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APPROVED V�IETLANDS INVENT pRY
Oregon Departinent of State Lands �
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C 0 M M U N I i Y
a E s o u e c E Date .��,�_. A�proved b�
P�ANNI�G
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with
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Loverna W�lson and Esther Lev,
EnvIlronffie�tal Cons�tants
Feb�a� 2003
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Table of Contents
Introduetion ...................................................................................................................................1
Study Area Ovefl vaevv ....................................................................................................................1
Historical ........................................................................................................................2
Current Use ..................,......................................................................................................3
Climate .........................................................................................:.,.........:...............................:...3
Topography ..................................................................................................................................4
Hydrology ...............................................................:.............................:......................................4
Geology ..................................... ..................................... ............................. ..... ........ .................... 5
Soils .............................................................................................................................................6
Vegetation Habitat Types ...............................................................................:.....................7
C ommunity Characteristics ...................:........:.......:..:.......................................................................... 7
Yegetation Types ........................................................................................................................ 8
Wetlands ...............................................................................:.............................................................13
P ubli� ancl Agen�y Involve�nent .................................................................................................15
Public Involvement ....................................................................................................................15
Agency Coordination .........................:................................. ......... ..........................................16
_ 1)ef nitions .....................................................................................................................................17
Resource Definitions (from Goal 5 Administrative Rule, Ch. 660, Division 23) .....................17
Other Terms ............................................................... .......:: ....'..... ......... ....:...:.......... ..........:.17
Wetlands .............................................................................................................:.........................23
InventoryMethods .....................................................................................................................23
Local Wetland Inventory Methods ..................................................................................................... 23
Wetland Function and Condition Assessment .................................................................................... 25
Mapping Procedures .......................................................................................................................... 27
Inventory .......................................................................................................................27
OFWAM Assessment Results ...................................................................................................30
Significant Wetlands Determination ..........................................................................................34
Riparian Corridors ......................................................................................................................36
Inventory Methods ............................................................
Review of Existzng Information ............................................
Field Inventory .....................................................................
Functional Assessment and Signifzcance Determination .....
Inventory Results ..............................................................
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............................................
............................................
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.............36
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.............. 37
.............. 38
.............39
�lest l.inn Wetland, Riparian and 1Nildlife Habitat Inventory
Winterbrook Planning
February 2003
Page i
Assessment Results .......................................................................................:............................42
Significant Riparian Corridor Determination ............................................................................43
Wildiife Habitat ...........................................................................................................................44
InventoryMethods .....................................................................................................................44
Review of Existing Information .......................................................................................................... 44
Field Inventoty ................................................................................................................................... 44
Sign�cance Determination ................................................................................................................ 46
Inventory ................................................................................................:......................46
Habitat Site Summaries ...................................................................................................:.....:............ 48
Assessment .......................................................................................'........................:.......... 52
Sig nificant Habitat Determination .....................................................................................:..:....53
Staff Qualif cations ......................................................................................................................54
Appendices �
Appendix A: Wetlaa►d Characterization '
Appendix B: Wetland Assessments
Appendix C: OFWAIVI Characterization _
Appendix D: Wetland Data Sl�ee#s
Appendix E: I2iparian Characterization
Appemdiac F: 12iparian Assessments
Append� G: Wildlife Assessuaents
West Linn Wetland, Riparian and Wildlife Habitat Inventory
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Table 6:
Table 7:
Table 8:
Table 9:
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Table 11:
'I'able 12:
West Linn Subwatersheds and �asin Areas ...........................................5
West I,inn Soil Characteristics ..........................................................7
Wetland Size by Subwatershed ........................................................27
Wetland Hydrogeomorphac Classifications ..........................................28
Wetland Cowardin Classifications ....................................................28
VVetland Size and Class by Subwatershed ...........................................29
O�+'W� Wetland Assess�ent Results ...............................................31
dVetland Assessrrient Results for the Study Area ........:..........................34
WestI�inn 12iparian Cor�-idors .........................................................40
lZiparian�unctfonal Assessment Summary .........................................48
Sum�aay of Wildlife �Iabitat Sites ...................................................4'7
�Iabitat Assessment Summary .........................................................52
Appendices
Appendix r�: Wetland Characterization
A.ppendix �: Wetland A.ssessments
Appendix C: OI+'VVAlV� Characterization f
Appendix I): Wetland Data Sheets
Appea►dix E: �aparian Charaeterizataon
Appendax F: I2iparian Assessments
Appendix G: V�aldlife r�ssessments
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West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
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Page iii
Introduction
This report summarizes the inventory of wetlands, riparian corridors, and wildlife habitats for the
City of West Linn, Oregon. The inventory is part of the City's efforts to address long-term
growth management goals and to comply with Statewide Planning Goal 5, which requires local
governments in Oregon to protect natural resources and conserve scenic and historic areas and
open spaces. The project originated from a Land Conservation and Development Commission
(LCDC) Periodic Review requirement for West Linn to inventory and protect wetlands and
riparian corridors. In May 2001, the City Council expanded the Goal 5 work program to include
wildlife habitat, natural areas, scenic areas, open spaces, and historic areas resources,
recognizing the importance of a comprehensive Goa15 program in achieving the City's livability
objectives.
The report begins with a review of study area characteristics, public involvement, agency
outreach efforts, and definitions of resources and related terms. Next, each resource (wetlands,
riparian corridors, and wildlife habitats) is addressed individually, with a brief introduction to the
resource category, review of inventory methods, a summary of inventory results, and preliminary
significance determinations. Site-specific documentation on the location, quantity, and quality of
individual wetland, riparian corridor, and wildlife habitat sites is provided in the appendices to
this report.
The location, quantity, and quality information and the associated inventory map provide the
basis for a significance determination, for analyzing the consequences of alternative courses of
action, and for making policy decisions regarding the type of protection program appropriate fox
each resource site. Following the inventory of natural resources, the City will review the draft
significant resource recommendations, make any amendments that may be warranted, and
formally adopt the inventory as part of the West Linn Comprehensive Plan.
Only those resources deemed "significant" will be included in the Goa15 Inventory and be
considered in Phase II of the project. In Phase II, the City will analyze conflicting uses and
weigh the economic, social, energy and environmental (ESEE) effects of different strategies to
protect resources. At the end of the process, after broad public outreach, neighborhood meetings,
and public hearings, a Goa15 resource protection plan with both non-regulatory conservation
incentives and new zoning requirements is likely to be adopted by the City.
Study Area Overview
The City of West Linn is located in northwest Clackamas County, across the Willamette River
from the communities of Oregon City and Gladstone, and southeast of Lake Oswego. The study
area is coincident with the City's Urban Planning Area (LTPA) , which totals approximately 5,258
acres. Approximately 5,038 acres are currently incorporated within the City, leaving 220 acres
of unincorporated land within the study area.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
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The Willamette River forms the eastern and southern boundary of the study area, extending
south from Marylhurst University and the Robinwood Neighborhood to the Tualatin River
confluence at Willamette Park. The study area is bounded by the Tualatin River on the southeast
(north to Johnson Road), unincorporated Clackamas County on the west, and the City of Lake
Oswego on the northwest. Interstate 205 bisects the southern part of the study area, at the base
of the West Linn hills.
HistoricaS Context
West Linn has a rich history that has been largely shaped by topography. The City lies at the
confluence of three Oregon Rivers: the Clackamas, Tualatin, and Willamette. Numerous streams
drain the hillsides that dominate West Linn; however, the City's historic commercial, industrial,
and residential areas were located on relatively flat land on the banks of the Willamette and
Tualatin Rivers.
These historic river flats had been occupied by Native American settlements for over 2,000 years
prior to European settlement. The Willamette R.iver and Willamette Falls were important fishing
and trading areas for the Watlamut and Kalapuya tribes. At ieast three archaeologically
significant sites are located along these rivers.
Beginning in 1840, European settlement in the West Linn area began. Several town sites were
established in the West Linn study area during the later part of the 19�` and early 20 centuries,
including Multnomah City (1842), Robin's Nest (1843), Linn City (1845), Willamette Falls
(1893), West Oregon City (1844), Millersburg (1913), and West Linn (1913). Economic growth
during this period was dependent upon shipping, which was limited by Willamette Falls and the
Clackamas Rapids. Farming and shipping interests, in particular, were constrained by hazardous
navigation and expensive portages around these natural features. The 1860 census showed a
population of 225. In 1861, a catastrophic fire destroyed much of the mills, wharves and
warehouses, as well as a steamship docked in the upper Linn City basin. No sooner had
reconstruction begun when the winter Willamette River floods swept away the remaining mills,
warehouses, stores and homes. The breakwater gave way, leading to the collapse of the grist and
sawmills. Only two dwellings and the warehouse remained standing.
In 1868, the Willamette Transportation Locks Company began excavation for a series of locks to
link the upper and lower portions of the river in 1868. In 1873, a boat passage was cut through
the rocks at the river's western bank to avoid Willamette Falls, thus removing navigational
impediments to trade and industry. The Willamette Falls Company platted the town of
Willamette in 1883 (which was incorporated into the City of West Linn in 1916).
West Linn's modern industrial base dates from 1888 when the Willamette Falls Pulp and Paper
Mill constructed a pulp mill on the banks on the river. In 1890, Crown Paper Company built a
mill on the adjoining site. Ownership of the locks changed several times over the years, until
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purchased by the US Army Corps of Engineers in 1913. The US Government has maintained the
locks ever since.
Current Land Use
Although West Linn had industrial beginnings, it has evolved primarily into a residential
community known for the quality of its quiet neighborhoods. The oldest homes are located near
the locks and near industrial sites — in the Willamette, Sunset, and Bolton Neighborhoods. New
neighborhoods have been established in flatter areas, both above and beiow the steep West Linn
hillside areas. More recently, residential development has moved onto the steeper hillsides and
former agricultural lands, particularly in the Tanner Creek basin. Development pressure in the
remaining undeveloped areas of West Linn is high, and management of this growth in a way that
preserves the important natural and scenic qualities of West Linn is a critical City goal.
Outside of the historic commercial core in the Willamette Neighborhood, commercial
development has expanded in two main strips along Willamette Drive (Highway 43), one near I-
205 and the other north of Mary S. Young Park. West Linn's new City Hall and adjacent
commercial center is located on the ridgetop at Salamo Road. Other institutional and community
service uses including the library, fire station, and several schools are located near the Highway
43 corridor. Other school sites are on located near City Hall and in the Willamette
Neighborhood.
Parks and open space lands ranging in size from one-tenth of an acre to 127 acres are found
throughout West Linn. Many of these lands are concentrated along the Willamette and Tualatin
Rivers, and in the west-facing hills between the Camassia Preserve and the northern city limits.
Climate
Weather patterns generally move west to east across the region, originating in the Pacific Ocean
and crossing the Coast Range and the Tualatin River valley before reaching West Linn. The
region's climate is greatly tempered by the winds from the Pacific Ocean. Annual average
precipitation is approximately 47 inches, more than 80 percent of which falls between October
and May. From November through January, monthly precipitation averages approximately 7
inches. Average annual snowfall is between 4 and 5 inches. Average daily minimum
temperatures range from 35 to 55 degrees (Fahrenheit). Average m�imum daily temperatures
range from 47 to 82 degrees.
Locally, temperatures, winds and rainfall vary with elevation, slope aspect, and degree of
vegetative cover. The West Linn ridge creates a mild rain shadow effect, with slightly lower
rainfall east of the ridge on the leeward slopes and lowlands.
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Topo4raahv
The City is situated on a series of terraces and foothills rising west from the banks of the
Willamette River and east from the Tualatin River. Ground elevations within the study area vary
between 5 feet (mean sea level) along the lower reach of the Willamette River to 760 feet at the
top of the hills.
The lowest terrace, which occurs primarily in the Willamette Neighborhood and north of the
Interstate 205 bridge, defines the Willamette River floodplain. A series of smaller forested
foothills and ravines rise above the floodplain to an elevation of approximately 130 feet (170 feet
to the south). A second terrace shelf extends inland to the base of the West Linn hills, which
parallels the Highway 43 and Interstate 205 corridors. The hills rise steeply, crossed by
numerous small ravines, to an elevation of 400 ta 600 feet. Above this elevation, the hills
become more rolling in character before reaching the summit along Rosemont Road.
Moderate to steep slopes (greater than 10 percent) make up about 58 percent of the study area,
while slopes of 10 percent or less represent only 42 percent. Approximately 15 percent of the
study area is comprised of slopes exceeding 25 percent. These slopes are generally located along
the steep eastern face of the West Linn ridgeline as well as along some of the city's southern and
west-facing slopes.
Hvdroloqv
The Willamette and Tualatin Rivers create the two primary hydrologic basins within the study
area. The Willamette River along the eastern edge of the City is the dominant hydrological
feature in the study area. The Willamette basin is 11,500 square miles in area and a11 of the
study area is contained within it. The Tualatin River, a tributary to the Willamette, is a
prominent feature in the southwestern portion of the study area. The Tualatin River basin is 166
square miles in area, of which approximately 700 acres is located within the West Linn study
area. These two rivers join at the southern tip of the study area and together form more than 60
percent of the study area boundary. A significant division of the Willamette River system, into
the "Upper" and "Lower" Willamette River, occurs at West Linn's Willannette Falls three miles
downstream of the Tualatin River.
Numerous small, perennial streams traverse the slopes of West Linn and discharge to the
Willamette and Tualatin Rivers. There are 13 Willamette subwatersheds, each with a stream
name designated by the City. They aze (listed in order from north to south): Fern Creek, Trillium
Creek, Heron Creek, Turkey Creek, Mary S Young Creek, Barlow Creek, Bolton Creek, Madd�
Creek, Cascade Springs Pond Creek, McLean Creek, Camassia, Sunset Creek, Tanner Creek, and
Bernert Creek.
The streams typically emerge from springs and seeps on the upland tenaces and slopes,
descending the West Linn hills through steep-gradient ravines before traversing the lowland
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terraces and discharging to the River. One additional stream (Fritchie Creek), located in the
southwest part of town, is a tributary to the Tualatin River. Approximately 393 acres of Fritchie
Creek's 670-acre basin are located within the study area.
Subwatersheds and their sizes within the study area are shown in Table 1.
Table 1. West Linn Subwatersheds and Basin Areas
Barlow Creek
Bernert Creek
Bolton Creek
Camassia
Cascade Springs Pond Creek
Fern Creek
Fritchie Creek
Heron Creek
Maddax Creek
Mary S Young Creek
McLean Creek
Sunset Creek
Tanner Creek
Trillium Creek
Turkey Creek
Tualatin River (remaining area)
Willamette River (remaining ar<
Total
201
412
117
219
52
555
393
123
106
269
38
77
659
543
20
309
1165
5258
The existing drainage system is a combination of natural streams, roadside ditches, culverts, and
underground storm drain conduits. The total length of the drainage system is approximately 93
miles, of which approximately 54 percent is piped. Numerous ponds are part of the drainage
system, serving a variety of functions. Some ponds were constructed for water quality or
quantity benefits, others as aesthetic amenities, and several are naturally occurring wetlands.
Although not directly part of the drainage system, two large (14 and 20 acre) aerated settling
basins for the West Linn and Blue Heron Paper Companies are prominent water features along
the Willamette riverbank in the southern part of the study area.
Geolopv
Geologic events leading to the formation of the West Linn hills began 16 million years ago
during the Miocene period. Volcanic fissures far to the east began discharging hundreds of cubic
miles of molten lava that flowed through an ancient Columbia River Gorge, flooding the
Willamette River valley. The solidified lava, Columbia River Basalt, covered the Scappoose
West Linn Wetland, Riparian and Wildlife Habitat Inventory
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Formation, a siltstone and shale deposit formed 22 million years ago when the region was
submerged under marine waters.
During the late Miocene period, a large upheaval of the Columbia River basalt base created the
West Linn hills and Tualatin Mountain ridge and simultaneously formed the Tualatin valley.
The valley floors settled over the course of several million years until, in the Pliocene period,
their basins breached, forming eddies in the Columbia River into which large quantities of
quartzite and granite river rock were deposited. Later in the Pliocene period, small volcanoes at
several locations along the hills began erupting Boring Lava, evident today in a layer of gray
basalt found around these volcanoes.
Later, silts were eroded from the Columbia River flood plain, carried down the gorge, and wind-
deposited on the hills. The massive Bretz Floods between 12,000 to 19,000 years ago eroded
this silt away from areas below 300 feet, but replaced it with Lacustrine deposits of silt and sand
as the flood waters receded. Evidence of West Linn's geologic past can be seen in the exposed
basalt outcrops in the vicinity of the Camassia Preserve. Also, during field surveys at Camassia,
a small granite boulder was observed, probably carried to West Linn from the far reaches of the
Columbia Basin. Silt and sand (alluvium) deposits formed in the more recent geologic past are
evident today along the Willamette and Tualatin River floodplains.
Soils
Soils in the West Linn study area belong to two primary soil associations: Aloha-Woodburn and
Cascade-Powell. The Aloha-Woodburn association is found along the Willamette and Tualatin
River terraces. It includes deep, somewhat poorly drained and moderately well drained soils that
formed in stratified glacio-lacustrine deposits. The Cascade-Powell association is found on the
rolling hills and high terraces in West Linn. It includes deep, somewhat poorly drained soils that
are underlain by a cemented layer and formed in silty material. The southern end of the West
Linn hills include Jory-Saum soils, which are deep, well drained soils that formed in colluvium
derived primarily from basalt.
Approximateiy 85 percent of the soils found in the West Linn study area are silt loams. Silty
clay loams cover about 5 percent of the area, located primarily along the stream corridors in the
Tanner Creek basin. Stony silt loams and basalt outcrops cover about 7 percent of the area,
along the south-facing hills above the Willamette River and the I-205 corridor. Table 2
summarizes the drainage, hydrologic, and erosion characteristics of soils found in the study area.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
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Table 2. West Linn Soil Characteristics
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Aloha silt loam lA, B 0-3, 3-6% somewhat poorly drained no C slight
Amity silt loam 3 0-3% somewhat poorly drained no D slight
Borges silty clay loam 7B 0-8% poorly drained yes D slight
Cascade silt loam 13B, C, E 3-g g o 5 ' somewhat poorly drained no C slight to severe
30-60 /o
Chehalis silt loam 16 0-3% well drained no B moderate
Coloquato silt loam 19 0-3% well drained no B moderate
Cornelius silt loam 23B, C, D 3-8 8 o rnoderately well drained no C slight to severe
15-30 /o
Cove silty clay loam 25 0-2% poorly drained yes D slight
Delena silt loam 30C 3-12% poorly drained yes D slight
Hardscrabble silt loam 36B 2-7% somewhat poorly drained . no D slight
Kinton silt loam 48D 15-30% moderately well drained no C moderate
Latourell loam 53C 8-15% well drained no B moderate
McBee silty clay loam 56 0-3% moderately well drained no C slight
McBee variant loam 57 0-3% somewhat poorly drained no D slight
Nekia silty clay loam 64B, C 2-8, 8-15% well drained no B slight to severe
Newberg silty clay 67 0-3% excessively drained no B slight
loam
Riverwash 73 0-3% N/A yes D N/A
Saum silt loam . 78C, D, E 8-15, 15-30, � drained no B moderate to severe
30-60%
Wapato silty clay loam 84 0-3% poorly drained yes D slight
Witzel very silty clay g9D 3-40% well drained no D moderate
loam
Woodberm silt Ioam 91B, C 3-8, 8-15% moderately well drained no C slight to moderate
Xerochrepts and 92F 20-60% well drained no C severe
He loxerolls
Veqetation and Habitat Tvpes
Community Characteristics
West Linn is located within the Willamette Valley vegetation zone as described by Franklin and
Dyrness (1973). A vegetation zone generally delineates a region of uniform macroclimatic
conditions with similar moisture and temperature gradients where one plant association
predominates. The Willamette Va11ey Zone is a relatively warm and dry region along the
Willamette valley bottom and lowlands enclosed by the Cascade and Coast Ranges. The zone
extends south from the Columbia River confluence area to the Umpqua River basin near Cotta.ge
West Linn Wetland, Riparian and Wildlife Habitat Inventory
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Grove, Oregon. Characteristic vegetation communities in the Willamette Valley Zone include
oak woodlands, conifer forests, grasslands, and riparian communities.
Yegetation Cover Types
Sixteen distinct vegetation cover types were identified during field investigations within the
West Linn study area. Upland and riparian classes include: Conifer Forest, Mixed Conifer /
Hardwood Forest, Hardwood Forest, Bottomland Forest, Oak Woodland, Shrub, Mixed Shrub /
Herbaceous, and Meadow / Grassland. Wetland classes are: Palustrine Forested, Scrub-Shrub,
Emergent and Open Water Wetlands. These cover types are summarized below. Additional
cover classes include: Parkland, Agriculture / Pasture, Developed/LJrban Land, and Quarry.
Several habitat types are further divided into subclasses, based on dominant vegetation or
wetland characteristics. These cover types are shown on the West Linn Wildlife Habitat
Assessment map.
The upland slopes of West Linn, stretching from the Willamette River to the ridgeline, include a
range of conifer, hardwood, and mixed hardwoodJconiferous forest types. They are generally
composed of a well-developed canopy and understory, including a diversity of trees, shrubs,
woody vines, herbs, and grasses. In some parts of the forest, particularly near the forest edge,
invasive plants such as English ivy and Himalayan blackberry have established themselves and
greatly reduced the diversiTy of the forest understory.
Conifer Forest
This habitat type is most prominent in Wilderness Park and occurs in smaller patches throughout
the city and along the forested ridge west of Highway 43. Approximately 198 acres of Conifer
Forest habitat occur within the West Linn planning area.
Conifer Forest habitat is comprised primarily of Douglas fir (Pseudotsuga menziesii) in fairly
pure stands, or a co-dominant with western red cedar (Thuja plicata). Hardwood species such as
bigleaf maple (Acer macrophyllum) and red alder (Alnus rubra) also can be found in this forest
type, but generally these comprise less than 30 percent cover within the stand. Other species
associated with Douglas fir are western hemlock (Tsuga heterophylla), grand fir (Abies gt-andis),
vine maple (Acer circinatum), serviceberty (Amelanchier alnifola), oceanspray (Holodiscus
discolor), Oregon grape (Berberis nervosa), western hazel (Corylus cornuta), salal (Gautheria
shallon), snowberry (Symphoricarpos alba), huckleberry (Vaccinium spp.), and red elderberry
(Sambucus racemosa). Forbs and grasses found within this cover type include: inside-out flower
(Vancouveria hexandra), avens (Geum spp.), strawberry (Fragaria spp.), chickweed (Galium
spp.), miner's lettuce (Montia siberica), trillium (Trillium spp.), violet (Viola spp.), and fescue
(Festuca spp.).
The structural and species diversity within this habitat type provides food, cover, and nesting
habitat for a variety of birds, both resident and migratory throughout the year. Great horned or
West Linn Wetland, Riparian and Wildiife Habitat inventory
Winterbrook Planning
February 2003 Page 8
other owl species, swallows, nuthatches, and wrens may use the tree cavities for nests. The
dense high shrub and low tree layer provides nesting habitat for song sparrow, kinglets and house
finch. Song sparrows, wrens, thrushes, and towhees will scour the leaf litter and downed logs for
insects and seeds. The diversity of seeds, nuts, downed logs, limbs, and leaf litter provide good
food, denning, and resting habitat for mamrnals. Squirrels, raccoons, coyotes, and fox may use
the downed wood and cavities as den sites. Skunks and deer mice reside in the fallen limbs and
downed trees. The large downed wood and leaf litter also is important for amphibians and
reptiles as both forage aud cover habitat. Salamanders, tree frogs, and garter snakes burrow
under the bark and use small crevices in the downed wood for thermal cover and refugia.
Mixed Conifer-Hardwoad Forest
Mixed forest types are common throughout the planning area, totaling approximately 578 acres.
This cover type includes a variety of tree species associations, found along a range of soil-
moisture gradients from dry south-facing slopes to shady north slopes and moist ravines and
lowlands. Mixed forest associations include:
• Douglas fir / Oregon white oak
• Douglas fir / bigleaf maple
• Douglas fir / red alder / bigleaf maple
• Douglas fir / westem red cedar / bigleaf maple
• Douglas fir / black cottonwood
• Douglas fir / Oregon ash
• western red cedar / bigleaf maple
• western red cedar / red alder
This habitat type typically has a closed canopy where both hardwood and conifer species
comprise greater than 30% of the stand. Some of these habita.ts were once oak dominated and
the firs have begun to overtop and in many cases stress the native oaks. In addition to the
dominant species in the various associations identified above, other tree species in this cover
type include western hemlock, grand fir, native and ornamental cherries, black hawthorn, and
occasionally cascara and Pacific dogwood, Associated understory shrub species include
oceanspray, western hazel, vine maple, osoberry, poison oak, salmonberry serviceberry, Oregon
grape, salal, and snowberry. Because of the deciduous nature of the overstory, a wide variety of
forb and grass species are found in the understory. English ivy is a threat to this native floristic
diversity, however, as it has encroached deep within many forested sites, suppressing the growth
of native species. Other invasive species such as Himalayan blackberry and English holly are
common along the edges of the forest.
Habitat quality is moderate to relatively high in this forest cover type, and tends to be higher in
areas with low levels of disturbance (e.g., ivy infestations) with greater species and structural
diversity. The mix of conifers and deciduous trees of different ages, tall and low-growing
shrubs, and a mostly native herbaceous layer provide a variety of forage, nesting and refuge
opportunities for wildlife. Many of the wildlife species identified in the conifer forest type were
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also noted in the mixed forests. A wide variety of both resident and migratory birds (warblers
and flycatchers) and several woodpeckers (including the sta.te-listed pileated woodpecker) also
use the mixed forest.
Hardwood Forest
Hardwood forest types are less common than mixed or conifer types and are scattered in small
stands within the planning area, particularly in the Bernert and Heron Creek basins. This forest
type covers approximately 120 acres of the city. It includes a variety of dominant trees and tree
associations, including:
■ bigleaf maple / red alder
■ bigleaf maple
■ red alder
• black cottonwpod
■ black cottonwood / bigleaf maple
■ Oregon ash
■ Oregon ash / red alder
■ Oregon white oak / Oregon ash
■ Oregon white oak / red alder
■ Oregon white oak / bigleaf maple
Conifers such as Douglas fir, western red cedar, and western hemlock also occur within this
forest type, but generally they comprise less than 30 percent cover within the stand. Understory
shrub species include salmonberry, red elderberry, western hazel, vine maple, osoberry, tall
Oregon grape, dewberry, salal, snowberry, and red osier dogwood. The herbaceous layer
consists of sword and lady fern, Pacific waterleaf, nettle, piggy-back plant, and inside-out flower.
Overall habitat quality in this cover type is moderate. Structural and species diversity is
moderate and disturbance levels are generally high due to the generally small and fragmented
stands of this cover type. Higher quality habitat occurs where this cover type is interspersed with
other upland and riparian communities (e.g., in Mary S. Young State Park).
There are close similarities between some of the associations identified in this cover type and
those of the Bottomland Forest (discussed below). The primary distinction is elevation: the
hardwood forest type is generally faund on the hills while the bottomland type occurs along the
Willamette and Tualatin River lowlands and floodplains.
Bottomland Forest
Remnant bottomland forest areas are found along the Willamette and Tualatin Rivers, with larger
patches occurring at Goat Island and Cedar Oak Park. This forest type once covered ten percent
of the Willamette River basin and now represents less than three percent. Bottomland forest
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covers approximately 83 acres within the West Linn planning area. It includes three
subcategories:
• black cottonwood
■ Oregon ash / black cottonwood
■ Oregon ash
Black cottonwood (Populus balsamifera var. trichocarpa) dominated forests make up about half
(or 45 acres) of this cover type. The cottonwood forest occupies slightly higher ground within
the floodplain and riparian corridor, which usually have a seasonally dry substrate. Flooding
events along the river provide occasional overland flow to these areas, but they generally tend to
be several feet higher than the lower-lying Oregon ash (Fraxinus latifolia) associations. Willows
(Salix spp.) are common associates of bottomland forest communities. Occasionally, red alder
(Alnus rubra) can be a significant component of an early successional bottomland forest, or a
transitional community between upland and bottomland. Conifers such as western red cedar
(Thuja plicata) occur infrequently in some of the bottomland communities. Other species found
in the bottomland forest include red-osier dogwood, Pacific ninebark (Physocarpus capitatus),
Douglas hawthorn (Crataegus douglasii), Douglas spiraea (Spiraea douglasii), salmonberry
(Rubus spectabilis), western hazel (Corylus cornuta), osoberry (Osmaronia cerasiformis),
serviceberry (Amalanchier alnifolia), red elderberry (Sambucus racemosa), and Nootka rose
(Rosa nutkana). Himalayan blackberry is widely established as an understory dominant in drier
portions of the forest, and has completely invaded some habitats such as Goat Island. The grass
and forb component include dewberry (Rubus ursinus), stinging nettle (Utica dioica), brome
grass (Bromus spp.), sedge (Carex spp.), and reed canarygrass (Phalaris arundinaceae).
Bottomland forests also may contain wetlands, but these are mapped separately as forested
wetlands.
Bottomland forests tend to be fairly productive wildlife habitats, but may be limited by the lack
of structural diversity in tree and shrub canopies when severe disturbance events (e.g., flooding)
produce even aged stands with little stratification. These forests serve as nesting, breeding, and
foraging habitats for a diverse range of bird, mammal, amphibian, reptile, and invertebrate
species. Great blue herons make wide use of this habitat, and a large colony of herons has
established a rookery on Goat Island. Osprey, belted kingfisher, downy and pileated
woodpeckers, Townsend's big-eared bat, and orange-crowned warbler are among the many other
bird species found within this habitat type. Ruby crowned kinglets, spotted towhees, bushtits,
wrens, thrushes and warblers will glean insects from the leaves, twigs, and branches of the
cottonwood, willows, and understory shrubs.
Oak Woodland
This habitat type is found on drier, generally south-facing slopes throughout the planning area,
but is particularly prominent in association with the basalt outcrops in the area of Camassia
Nature Preserve, West Linn High School, and the slopes bordering the I-205 corridor.
Approximately 89 acres of Oak Woodland habitat occur within the West Linn planning axea.
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This habitat is comprised primarily of widely spaced Oregon white oak (Quercus garrayana).
Pacific madrone (Arbutus menziesii) is common in some areas, and Douglas fir (Pseudotsuga
menziesii) has also established itself but generally comprises less than 30 percent cover of this
type. Occasionally, black hawthorn, grand fir (Abies gr�andis), and cherry (Prunus spp.) are
found here. Associated understory species include poison oak (Toxicodendron diversiloba),
common snowberry (Symphoricarpos alba), serviceberry (Amelanchier alnifola), oceanspray
(Holodiscus discolor), Oregon grape (Berberis ner-vosa), rose (Rosa spp.), and trailing
blackberry (Rubus ursinus). A variety of forbs and grasses are associated with this cover type.
A common dominant in areas on shallow soils and rock ledges is licorice fern; sword fern
(Polystichum munitum), bracken fern (Pteridium aquilinum), and fririgecup (Tellima gi-andiflora)
are also common associates. English ivy and Himalayan blackberry are occasionally found
along disturbed or cleared edges of this cover type.
This is a relatively rare and diminishing habitat in West Linn. Several sensitive plant and animal
species occur in association with this habitat type, as described in the habitat site summaries in
the Wildlife Habitat section. The Oak Woodland cover type provides habitat for a variety of
wildlife species. For example, kinglets, bushtits, wrens, thrushes, and warblers will eat insects
directly from the leaves, twigs, and branches. Woodpeckers, flickers, and brown creepers are
also common users of this habitat type. Oak galls and acorns provide a good food source for
titmice, scrub jays, Stellar jays, and nuthatches. Tree cavities in the oak provide nesting habitat
for swallows, nuthatches, wrens, great horn and other owls. Squirrels, gophers, and wood rats
eat the acorns, hazelnuts, and other nuts.
Shrub and Miged Shrub / Herbaceous
Two closely related cover types, which both tend to be dominated by non-native species, are
addressed here. The shrub cover type accounts for only 30 acres within the planning area.
Upland shrub habitat occurs primarily as a successional transition between urban land or
meadows and forest cover types. The mixed shrub/herbaceous type covers approximately 77
acres of land and consists of interspersed shrub thickets and grass-dominated fields.
Much of the shrub and mixed shrub/herbaceous habitat is found in and adjacent to disturbed
areas that are dominated by invasive non-native plant species such as Himalayan blackberry and
Scot's bBroom (Cytisus scoparia). Other shrub species found in association with these
dominants include Douglas' hawthorn, willow, red-osier dogwood, rose, and Douglas spiraea.
Common grass species include tall fescue, tall oatgrass, velvet grass, wild rye (Elymus cinerous),
wheat grass (Agropyron spp.), and bluegrass (Poa spp.).
Although many of the dominant plant species are exotic invasives, most of the plants found
within these habitat types produce fruit, nuts, and seeds that provide high food value for birds
and mammals. Cedar waxwings, robins, and thrushes eat the fruits of the hawthorn, elderberry,
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and other fruit bearing shrubs. Overall habitat quality is low, however, owing to the low levels
of structural and species diversity.
Meadow / Grassland
Meadow/grassland habitat occurs in small pockets within the planning area, and occasionally
may include managed pasture or park lands. Approximately 67 acres of ineadow/grassland
habitat occurs within the West Linn planning area.
Three subcategories of Meadow/grassland habitat were identified: unmanagedlseasonal mowing,
regular mowing, and a grassy bald community. The grassy bald community, approximately five
acres in total size, is located primarily at the Camassia Preserve and consists of native grasses
and forbs as well as non-native species such as velvet grass. The other two subcategories
typically occur in formerly disturbed areas and are dominated by perennial grasses such as tall
fescue, tall oatgrass, , and orchard grass which tend to crowd out the native species. Without
management by mowing or fire, Himalayan blackberry and Scot's broom begin to invade and
dominate these sites (resulting in succession to a more shrub dominated cover type).
Voles, pocket mice, snakes, and lizards are common within this habitat type, making them prime
feeding areas for hawks, falcons, owls, and coyotes. Butterflies are commonly found in upland
meadows. Crows, robins, song sparrows, and other common resident ground feeding bird
species are also found within this habitat type.
Wetlands
Three primary wetland types occur in West Linn: Palustrine Forested Wetland, Palustrine Scrub-
Shrub Wetland, and Palustrine Emergent Wetland. Emergent wetland is the most common type,
followed by forested wetland, and scrub-shrub wetland. Another wetland type, open water,
totaled less than one acre in size. These four wetland types are summarized below. A shrub-
shrub wetland mosaic (a complex of wetlands interspersed non-wetlands) is described in the
Wetland WI-03 characterization form in Appendix A.
Forested Wetlands
Forested wetlands generally include wetlands or portions of wetlands dominated by woody
species over 30 feet in height. Forested wetlands are distributed primarily along the Willamette
River and in smaller clusters along Tanner and Trillium Creeks. Approximately 38 acres of
forested wetland occur within the West Linn planning area.
Forested wetlands in West Linn include a combination of deciduous species dominated by
Oregon ash (Frcrxinus latifola) and black cottonwood (Populus trichorcarpa). Other common
tree species include red alder (Alnus rubra) , western red cedar (Thuja plicata ), and Pacific
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willow (Salix spp.). Understory vegetation varies widely, from native shrub and emergent
species to sites dominated by reed canary grass( Phalaris arundinaceae).
These wetland habitats generally provide high quality habitat for a wide variety of birds,
mammals, reptiles and amphibians. Structural and species diversity is generally high, although
may be limited in floodplain areas dominated by cottonwoods and a reed canary grass
monoculture. Habitat interspersion and connectivity is typically high, with linkages along
riparian corridors and to upland habitats.
Scrub-Shrub Wetlands
Scrub-shrub wetlands are transitional habitats characterized by woody species less than 30 feet in
height. These wetlands are distributed in small pockets throughout the West Linn planning area.
The total area of scrub-shrub wetlands is approximately 10 acres.
Scrub-shrub wetlands in West Linn include a wide variety of deciduous species dominated by
Salmonberry, red-osier dogwood, Pacific willow, Pacific ninebark, and in one instance quaking
aspen. Other less common species include Douglas hawthorn, Nootka rose, red-osier dogwood,
Douglas spiraea, and several other willows. Emergent species at these sites are limited in
diversity and often dominated by reed canary grass.
These wetland habitats provide insectivorous species such as warblers, flycatchers and swallows
food, cover, and nesting habitat. Otter and beaver are commonly found within this habitat type.
Structural and species diversity is moderate while connectivity is generally high for sites along
riparian corridors.
Emergent Wetlands
Emergent wetlands include marshes and shallow ponds dominated by grasses and other
herbaceous plants. This is the most common wetland type within the planning area; it occurs in
every subwatershed and is most abundant along the Willamette and Tualatin Rivers. The total
area of emergent wetlands is approximately 38 acres.
Many emergent wetlands in West Linn are dominated by non-native reed canarygrass, alone or
in combination with stinging nettle or slough sedge. Native species dominated associations
include skunk cabbage/piggy-back plant, skunk cabbage/giant horsetail, soft rush, and common
camas. Other emergent plants include sedges, bullrushes, and cattails.
Small mammals and snakes axe commonly found within this habitat type, which in turn attract
northern harriers, red tail hawks, owls, and coyotes that feed upon them. Overall habitat value of
this wetland type is moderate; species diversity is moderate, structural diversity is low, and
connectivity is generally high for sites along riparian corridors.
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Open Water
Open water habitats generally include ponds and standing water habitats greater than six feet in
depth. Open water areas provide important and necessary habitat for fish, aquatic invertebrates,
water dependent mammals such as river otter, fish-eating birds (kingfisher, osprey, eagles),
waterfowl, gulls and shorebirds. The off-channel open water habitats along the Tualatin and
Willamette Rivers also provide important habitat for fish, particularly juvenile salmon. Open
water areas are commonly associated with other wetland types (emergent, scrub/shrub, and
forested). Habitat connectivity is typically high, with linkages along riparian corridors and to
adjacent upland habitats.
Public and Agency Involvement
Public Involvement
On Apri14, 2001, the City Council held a public meeting to review the work scope for the Goal 5
inventory. Recognizing the importance of completing a comprehensive inventory of Goa15
resources, the City Council voted to expand the work scope (beyond the Periodic Review tasks
for wetlands and riparian corridors) to include wildlife habitat, scenic, open space, natural areas, ,�„
and historic resources. �
��
In response to a request by the Oregon Division of State Lands (DSL) during Si.unmer 2001 to s s '
delay the wetland field work until Spring 2002, the City reorganized its work schedule so that � �, �
scenic, open space, natural areas, and historic resources would be addressed first, with wetland, No �.r�'�
riparian, and wildlife habitat inventories to begin in the Spring of 2002. The following is a � =�.R�`
summary of public involvement efforts related to the wetland, riparian, and wildlife habitat
inventories. Most of the following discussion of public outreach efforts also applies to other
Goal 5 resources, including historic sites and structures, scenic resources, open space and natural
areas.
A joint City Council and Planning Commission work session was held in January 2002 to
discuss the status of the project and the natural resource field inventory scheduled to begin in the
Spring of 2002. Notice of the work session was posted in the West Linn Library, Post Office,
and City Hall. In addition to the City Council and Planning Commission, local residents, state
and regional agencies, and City staff participated in the meeting.
Draft inventory maps were available on the City's web site and at City Hall in early February
2002. At the same time, maps were sent to each of the City's neighborhood associations. Draft
inventory findings, definitions, criteria, project work schedule and contact information were also
available for public review and comment in February.
Between February and May, 2002, City planning staff attended meetings at seven of the City's
neighborhood associations and the Chamber of Commerce. At these meetings, staff presented
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information about the purpose, current status, and preliminary findings of the study. Staff
discussed opportunities for public participation and input, and attendees were invited to the city-
wide Open House. A survey was also distributed, requesting information on local resources and
general comments on the project.
In March 2002, a landowner notice was prepared with input from the City and DSL. The letter
included an invitation to the Open House and described ways that property owners and other
interested parties could become involved in the project and the process of resolving conflicts and
developing a wetlands protection program. The letter also included a right-of-entry request for
landowners whose property might potentially contain wetlands. The City prepared a spreadsheet
identifying the access status of all potential wetland properties, with contact information where
provided. Owners who requested contact prior to entry or wanted to be present for the fieldwork
were contacted directly by the consultant team.
A city-wide Open House was held in Apri12002, with members of the City Council, Planning
Commission, DSL and other agencies present. The Open House provided information about the
process, status and preliminary findings for wetlands, riparian corridors, and wildlife habitats, as
well as other Goa15 resources covered by the study. Information on the Goa15 process, ESEE
analysis requirements, and wetlands protection programs in general was also provided. A GIS
workstation was available for residents to view information about specific resources on
individual properties.
A City Council work session was held September 9, 2002 to discuss the draft inventory findings
and the next phases of the project. Subsequent Council Work Sessions were held on January 7
and March 6, 2003. The Council heard public comment at each of these work sessions and
provided additional input on the inventory and Goa15 policy direction.
Additional neighborhood meetings and open houses are planned in the Spring and Summer of
2003 to review the Phase 2 work.
Aqencv Coordination
The consultant team coordinated closely with DSL and other resource agencies throughout the ��
inventory process. Meetings with DSL occurred in August Z001, and in January and Apri12002;
with regular phone and email communications occurring during the intervening months and
continuing through the LWI approval process. DSL staff provided input in the scheduling of
fieldwork, landowner notice process, public involvement process, and attended the Apri12002
Open House.
City Council and public comments were incorporated into the Local Wetlands Inventory, which
was then sent to DSL for approval in Februa , 2003. Following DSL approval of the LWI, the
City will mail a notice to affected landowner� m �'�.,
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The consultant team and City planners also contacted and coordinated with other agencies
throughout the Goa15 process, including:
■ City of West Linn (e.g., Planning, Parks, Engineering);
■ Clackamas County;
■ Metro;
■ Oregon Department of Environmental Quality (DEQ);
■ Oregon Department of Fish and Wildlife (ODFW);
■ Oregon Department of Forestry (DOF);
■ Oregon Department of Land Conservation and Development (DLCD);
■ State Historic Preservation Office (SHPO);
■ The Oregon Natural Heritage Program (ORNHP);
■ The Nature Conservancy (TNC);
■ U.S. Fish and Wildlife Service (USFWS); and
■ West Linn - Wilsonville School District.
Definitions
This section provides a definition of each of the resources addressed in this report (wetlands,
riparian corridors, and wildlife habitat) followed by definitions of associated terms, inventory
methods and state Goa15 requirements.
Resource Definitions (from Goal 5 Administrative Rule, Ch. 660, Division 23)
Riparian Corridor — an area along a river, lake, or stream which includes the water areas, fish
habitat, wetlands, and adjacent riparian areas that mark the transition from an aquatic ecosystem
to a terrestrial ecosystem.
Wetland — an area that is inundated or saturated by surface water or groundwater at a frequency
and duration sufficient to support, and that under normal circumstances does support, a
prevalence of vegetation typically adapted for life in saturated soil conditions.
Wildlife Habitat — an area upon which wildlife depend in order to meet their requirements for
food, water, shelter, and reproduction.
Other Terms
Basin — a topographical entity within which all the surface water draining to a single point falls;
some of the surface water may have come from groundwater fed by geological strata outside the
basin.
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Cowardin Class — the wetland classification according to the U.S. Fish and Wildlife Service's
Classification of Wetlands and Deepwater Habitats of the Uxuted States, Cowardin et al., 1979.
The two primary Cowardin systems occurring in West Linn are:
■ palustrine - freshwater (less than 0.5 parts per thousand ocean-derived salts) area
dominated by trees, shrubs, persistent emergents, emergent mosses, or lichens. They can
be non-tidal or tidal. Palustrine also includes wetlands lacking this vegetation, but having
the following characteristics: (1) area less than 20 acres; (2) no active wave-formed or
bedrock shoreline; (3) water depth in the deepest part is less than 6.6 feet at low water.
■ riverine - freshwater (less than 0.5 parts per thousand ocean-derived salts) areas that are
contained within a channel and which are not dominated by trees, shrubs, and persistent
emergents (for example, rivers and streams).
Emergent — a plant that grows rooted in shallow water, the bulk of which emerges from the
water and stands vertically. Usually applied to non-woody vegetation.
Emergent Wetland — a subclass of palustrine system (see Cowardin Class above), a wetland
characterized by erect, rooted, herbaceous hydrophytes, excluding mosses and lichens.
Enhancement — an improvement in the functions and values of an existing wetland, forest, or
other natural resource.
Exotic species --plants that are not indigenous to the Pacific Northwest (see invasive species).
Field Verification — to walk over and/or visually check an area, for example, to make a wetland
determination and map wetlands (this may or may not include collecting sample plot data).
Fish habitat those areas upon which fish depend in order to meet their requirements for
spawning, rearing, food supply, and migration.
Floodplain — river valley apart from the river channel which is inundated only in a flood event,
attenuating the flood discharge. The 100-year floodplain shows the flood with a 100-year
recurrence interval (shown on Federal Emergency Management Agency (FEMA) Flood Rate
Insurance Maps).
Forested Wetland — a subclass of palustrine system (see Cowardin Class above), a wetland
characterized by woody vegetation that is six meters (20 feet) tall or taller.
GIS or Geographic Information System — a system of hardware, software and data storage that
allows for the analysis and display of information that has been geographically referenced.
Goa15 — Statewide Planning Goal (OAR Chapter 660, Division 23) intended to protect natural
resources and conserve scenic and historic areas and open spaces.
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Goa15 Inventory — a survey, map, or description of one or more resource sites that is prepared
by a local government, state or federal agency, private citizen, or other organization and that
includes information about the resource values and features associated with such sites.
Growing season — the portion of the year when soil temperatures are above biologic zero at 50
cm (19.7").
Herbaceous — with the characteristics of an herb; a plant with no persistent woody stem above
ground.
Hydric soil — a soil that formed under conditions of saturation, flooding, or ponding long
enough during the growing season to develop anaerobic conditions in the upper part.
Hydrogeomorphic Method or HGM — a scientific method of wetland classification and
functional assessment based on a wetland's location in the landscape and the sources and
duration of water flow. The HGM approach identifies the wetland classes present in each region,
defines the functions that each class of wetlands performs, and establishes reference sites to
define the range of functioning of each wetland class. HGM class or subclass means the
hydrogeomorphic classification of the wetland based upon its landscape position and hydrology
characteristics, according to the HGM key developed by the Division of State Lands.
Hydrology — The properties, distribution, and circulation of water.
Hydrophyte — Any plant growing in water or on a substrate that is at least periodically deficient
in oxygen as a result of excessive water content.
Hydrophytic vegetation — See hydraphyte.
Invasive species — Those species which become established easily in disturbed conditions,
reproduce readily, and often establish monocultures. Most invasive plants are non-native
species. Examples of common invasive species in West Linn are: Himalayan blackberry,
English ivy, and reed canarygrass.
Indicator - The soil, vegeta.tion, and hydrology characteristics or other field evidence that
indicate that wetlands are present.
Indigenous Anadromous Salmonids — Chuxn, sockeye, Chinook and Coho salmon, and
steelhead and cutthroat trout that are members of the family Salmonidae and are listed as
sensitive, threatened or endangered by a state or federal authority.
Local Wetlands Inventory (LWI) — A collection of maps and information about wetlands
throughout a local community that provides a planning tool for balancing the protection of
wetland functions with other community needs. In 1990, DSL adopted guidelines and rules for
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conducting LWIs within urban growth boundaries. The LWI rules were updated in February
2001. LWIs satisfy the requirements for wetland inventories under Statewide Planning Goa15
(Natural Resources). Once approved, LWIs become part of the Statewide Wetlands Inventory.
Mapped LWI wetland boundaries are generally accurate to within 25 feet, but may less in areas
that could not be field verified. A wetland boundary delineation may be needed to determine
whether regulations apply to a particular development proposal. The City of West Linn set a
minimum wetland size threshold of 5,000 square feet to recognize the significance of smaller
wetlands in the urban environment.
Locally Significant Wetlands (LSW) — Those wetland sites that provide fiinctions or exhibit
characteristics that are pertinent to community planning decisions made at a local scale, for
example, within a UGB. These wetland sites shall be identified by local governments according
to the criteria and procedures in sections 141-086-0340 and 141-086-0350.
Native Plant Community — A recognized assemblage of plant species indigenous to Oregon.
All such wetland plant communities are listed in the most recent version of Classification and
Catalog of Native Wetland Plant Communities in Oregon (Oregon Natural Heritage Program).
Offsite Determination — A wetland determination conducted without field verification using
NWI maps, soils maps, and aerial photographs.
Evaluation Descriptor — From OFWAM, a summary statement describing whether the wetland
is (1) intact, (2) impacted or degraded, or (3) function is lost or not present.
Ordinary high-water mark — The line on the shore established by the fluctuations of water and
indicated by physical characteristics such as: a clear, natural line impressed on the bank; changes
in the character of soil or vegetation; shelving; or the presence of a line of litter or debris.
Rare Plant Community - Relictual, uncommon or unique in Oregon, determined by number of
occurrences and threats following national heritage program criteria (i.e., rarity ranking of G1-
G3 or S1-S3).
Reach — A length of channel with uniform characteristics.
Restoration — Restoration is the process of repairing damage to the diversity and dynamics of
ecosystems. Ecological restoration is the process of returning an ecosystem as closely as
possible to predisturbance conditions and functions.
Riparian area — The area adjacent to a river, lake, or stream, consisting of the area of transition
from an aquatic ecosystem to a terrestrial ecosystem.
Riparian corridor — A Goa15 resource that includes the water areas, fish habitat, adj acent
riparian areas, and wetlands within the riparian area boundary.
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Riparian corridor boundary — An imaginary line that is a certain distance upland from the top
bank.
Sample Plot — A specific area on the ground where soils, vegetation and hydrology data are
recorded on a field data form in order to make a wetland determination.
Scrub-shrub Wetland — A subclass of palustrine system (see Cowardin Class above), areas
dominated by woody vegetation less than 6 meters (20 feet) tall. The species include tree shrubs,
young trees, and trees or shrubs that are stunted because of environmental conditions.
Stream — A channel such as a river or creek that carries flowing surface water, including
perennial streams and intermittent streams with defined channels, and excluding man-made
irrigation and drainage channels.
Top of bank — Has the same meaning as "bankfull stage" defined in OAR 141-085-0010(2).
The stage or elevation at which water overflows the natural banks of streams or other waters of
this state and begins to inundate the upland. In the absence of physical evidence, the two-year
recurrence interval flood elevation may be used to approximate the bankfull stage
Wetland Assessment or Functional Assessment — An evaluation and rating of the relative
quality of a wetland by measuring its condition and its capacity to perform certain functions.
Wetland Boundary — A line marked on a map that identifies the approximate wetland/non-
wetland boundary.
Wetland Condition — The integrity of a wetland's physical and biological structure, which
determines the wetland's ability to perform specific functions, as well as its resilience and
enhancement opportunities.
Wetland Delineation — A determination of wetland presence that includes marking the wetland
boundaries on the ground andlor on a detailed map prepared by professional land survey or
similar accurate methods.
Wetland Delineation Manual or 1987 Manual — Provides technical guidelines and methods to
determine whether an area is a wetland for purposes of Section 404 of the Federal Clean Water
Act. The objective of the Act is to maintain and restore the chemical, physical, and biological
integrity of the waters of the United States.
Wetland Determination — Identification of an area as wetland or non-wetland.
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Wetland Function — Characteristic action or behavior associated with a wetland that contributes
to a larger ecological condition such as wildlife habitat, fish habitat, water quality, and/or flood
control.
Wetland hydrology — The total of all wetness characteristics in areas that are inundated or have
saturated soils for a sufficient duration to support hydrophytic vegetation.
Wetland Indicator Status — Categories of plant species based upon the estimated probabilities
(expressed as a frequency of occurrence) of a species occurring in a wetland or non-wetland.
Wetland indicator status (WIS) includes the following:
■ Obli� (OBL): species that almost always occur in wetlands under natural conditions (estimated
probability >99%).
■ Facultative wetland (FACW): species that usually occur in wetlands (estimated probability 67 to
99%), but are occasionally found in non-wetlands.
■ Facultative (FAC): Species that are equally likely to occur in wetlands or non-wetlands
(estimated probability 34 to 66%).
■ Facultative u�land (FACU): species that usually occur in non-wetlands (estimated probability 67
to 99%}, but are occasionally found in wetlands.
■ Upland (UPL): species that almost always occur in non-wetlands under normal conditions
(estimated probability >99%).
■ Not listed (NL): species that are not listed and are presumed to be upland species.
■ No indicator status (I�TI): species that have not yet been evaluated.
A(+) or (-) following the WIS signifies a greater or lesser likelihood of being found in wetland
condition.
Wetland Mosaic — A complex of several wetlands smaller than one-half (0.50) acres in size each
that are interspersed between areas of non-wetland.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 22
Wetlands
The Local Wetland Inventory (LWI) was conducted in two phases to allow a substantial portion
of the field inventory to occur during the preferred spring season. (Drought conditions during
2001 and a recommendation from the Oregon Division of State Lands (DSL) prompted the City
Council to delay the fieldwork.) The first phase of the inventory was the planning phase in
which methods were defined, field base maps prepaxed, and significance criteria determined.
Public notice of the project was published in the local paper and project information and
preliminary inventory maps were placed on the City web site. This phase occurred between dune
2001 and March 2002. In March, the field inventory and public involvement process of the
Inventory Phase began. This phase included the on-site field inventory, functional assessments,
and significance determination. This phase concluded in June 2002.
West Linn's Loca1 Wetland Inventory differs from other standard inventories in an important way: the
West Linn City Council set a minimum wetland size threshold of 5,000 square feet (instead of one-
half acre) in recognition of the local importance of the many smaller wetlands and the functions they
provide in the urban environment. Nearly one-half (20 of 44) of wetlands identified in this inventory
are less than one-half acre in size.
A LWI provides maps and information about wetlands throughout a local community and
provides a planning tool for balancing the protection of wetland functions with other community
needs. In 1990, DSL adopted guidelines and rules for conducting LWIs within urban growth
boundaries. The LWI rules were updated in February 2001.
Once approved by DSL, the LWI replaces the National Wetlands Inventory (NWI) and is
incorporated into the Statewide Wetlands Inventory. A LWI fulfills the location and quantity
information required for Goa15 inventories, but does not provide quality information. A wetland
quality assessment was conducted concurrently with the LWI using the OFWAM method
developed by DSL. Data collected for the LWI will assist local landowners and planning
agencies in making decisions about future development. Mapped LWI wetland boundaries are
generally accurate to within 25 feet. A wetland boundary delineation may be needed to
determine whether regulations apply to a particular development proposal.
Inventorv Methods
Local Wetland Inventory Methods
Two levels of investigation were conducted for the inventory of wetlands: a review of existing
information and a field inventory.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 23
Review of Existing Information
A review of existing literature, maps, and other materials was conducted to identify wetlands or
site characteristics indicative of wetlands within the West Linn planning area. The document
review included the following sources of information:
■ B/W stereo photographs (David Smith, 1996)
■ Color aerial stereo photographs (Spencer Gross, 1999)
■ Digital color ortho-photographs (2001; scale of field maps: 1 inch = 200 feet)
■ Division of State Lands wetland determination files
■ Federal Emergency Management Act (FEMA) floodplain maps, and 1996 Flood Line,
FEMA, Metro RLIS
■ Historic aerial photographs (City of West Linn, 6/25/70, DFK-2LL-180 and -181)
■ Local knowledge of sites {e.g., residents, West Linn High School environmental program,
West Linn Parks Department, Camassia Preserve Manager);
■ Local wetland inventory data including "Wetland Inventory of the City of West Linn,
Oregon" (Sharp and Wilson, 1988), City of West Linn permit files with wetland
delineations, West Linn Parks Department wetland delineations, Wetland Visual Sites
(West Linn GIS 2001)
■ National Wetland Inventory maps (1982) qv� r� ,: : � r� � � � , � %� S � r �'� ��' af `"`✓ a � �'��' � Y
■ Oregon Natural Heritage Program data
■ Oregon Department of Forestry and Oregon Department of Fish and Wildlife stream
classification maps and maps of fish-bearing streams
■ Other agency data and communications (e.g., Clackamas County, Metro, Oregon
Departrnent of Fish and Wildlife, Oregon Department of Forestry, Oregon Division of
State Lands, U.S. Fish and Wildlife Service)
■ U.S. Geological Survey (USGS) 7.5 minute topographic maps
■ U.S. Natural Resources Conservation Service (NRCS 1976) Clackamas County soil
survey (with soil sample locations) and County list of hydric soils and soils with hydric
inclusions
■ West Linn Stormwater Drainage Master Plan (Woodward-Clyde Consultants, 1995) and
West Linn Storm System data (West Linn GIS 2001)
■ West Linn Topography (4-foot contours, West Linn GIS 2001)
This information was used as the basis for preparing a GIS base map showing potential wetland
sites. Aerial photo interpretation of was tested by interpreting several wetland types and ground-
truthing the interpretations. The 1996 and 1999 stereo-pair photographs were interpreted using a
Topcon stereoscope and the resulting potential wetland sites were mapped.
In cases where property access was denied, off-site determination methods were employed using
the above information and maps. In many cases, investigators were able to view the potential
wetland areas from nearby public rights-of-way, parks and open space lands. Areas e�ibiting
wetland indicators such as wetland hydrology or dominant hydrophytic vegetation were noted.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 24
Off-site determinations were based on off-site viewing, interpretation based on photo signatures
of adjacent wetlands, review of topography and soils data, and other information noted above.
Field Inventory
The inventory field work was performed between March and June, 2002. The methods followed
the Oregon Division of State Lands' (DSL) LWI procedures as outlined in OAR 141-86-180
through 240, as amended July 1, 2001. The wetland size threshold of 141-086-021Q(10) was
reduced by the West Linn City Council so that all wetlands 5,000 square feet (0.115 acre) and
larger were identified and mapped.
Where property access was permitted, wetland determinations were made using the Corps of
Engineers Wetlands Delineation Manual (Environmental Laboratory 1987). The manual
requires independent evidence of three parameters for an area to be declared as wetland: hydric
soils, hydrophytic vegetation, and wetland hydrology. Location of sample points and mapping
conventions followed state LWI standards and were not intended to define the limits of
regulatory jurisdiction.
Wetlands with DSL-approved determinations were field-verified to determine whether wetlands
were still present and of the same size and configuration as when delineated. Wetland
boundaries were verified through visual on-site observation of vegetation and hydrology. In
cases where boundaries could not be reliably verified through visual observation, sample plots
were established. Where revisions to recorded boundaries were warranted, the wetland mapping
was adjusted to reflect the approximate current boundary and the adjustment was noted on the
wetland summary sheets.
For other wetlands where access was granted, the consultant team generally established between
two and six sample plots at locations that best characterized the wetland. Consultants recorded
information regarding each of the three-wetland parameters (i.e., soils, vegetation, and
hydrology) to distinguish wetlands from non-wetlands. The LWI map shows the location of
wetlands and the individual sample sites. General characteristics of each wetland were
documented, including approximate wetland size, Cowardin and HGM classifications, soil type,
hydrologic source, dominant plant species, field dates, field investigators, a summary of the
wetland context, and other relevant data. Wetland characteristics were recorded on individual
summary sheets contained in Appendix A. Appendix B contains completed Wetland
Determination Forms for wetlands sampled using the on-site method.
Wetland Function and Condition Assessment
Wetland quality was assessed using the Oregon Freshwater Wetland Assessment Methodology
(OFWAM). The OFWAM evaluates the extent to which a wetland performs certain functions
based on specific characteristics. It assesses wildlife habitat, fish habitat, water quality,
hydrologic control, education, recreation, sensitivity to impact, enhancement potential, and
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 25
aesthetic quality. The result of the assessment is an"evaluation descriptor" indicating whether a
wetland function is intact, degraded, or not present. Factors such as size of wetland, structural
and biological diversity, presence of rare or endangered species, land-use, and access are used in
the rating system.
An OFWAM field form was used to characterize wetlands and address specific functions that
required field observation. Data collected in the field included the presence and extent of
Cowardin classes, vegetative cover, wetland hydrology (source, storage, discharge), character of
adjacent water bodies, degree of public access, aesthetic qualities, and other field data essential
to the OFWAM assessment. The field evaluations were generally conducted from viewing areas
near wetland sample sites where on-site access was permitted, or from neighboring public rights-
of-way or other public land when access was not granted. Viewing locations were documented
in the Wetland Characterization sheets (Appendix A) and the Wetland Assessment sheets
(Appendix B).
The OFWAM assessments were completed in the office using field data, aerial photographs,
maps, and information gathered from public agencies (e.g., water quality, sensitive species, and
related resource data). Several public agencies were contacted, including:
■ Oregon Department of Environmental QualiTy (DEQ);
■ Oregon Department of Fish and Wildlife (ODFV�;
■ Oregon Department of Forestry (DOF);
■ The Oregon Natural Heritage Program (ORNHP);
■ U.S. Fish and Wildlife Service (USFWS).
The OFWAM includes an initial set of questions to assess whether any wetlands within the study
area should be considered Wetlands of Special Interest for Protection (WSIP). The questions
address whether a wetland is in a management plan, is protected by regulatory rules and statutes,
or is uncommon in Oregon. An affirmative answer to any one of the ten questions will place the
wetland into the WSIP category and management decisions should be made to protect the site.
This report includes the following information:
■ Wetland Characterization results
■ Answer sheets for ali wetland assessment questions
■ Function and condition summary sheet
■ Assessment results represented in table format
Following completion of the LWI and the OFWAM functional assessment, all wetlands were
evalua.ted against the Locally Significant Wetland (LSW) Criteria of OAR 141-086-0350. In
addition to the mandatory criteria, the City chose to apply the two optional criteria (i.e., do
wetlands contain a locally unique native plant community or do they provide educational uses
and are publicly owned).
West Linn Wetland, Riparian and Wiidlife Habitat inventory
Winterbrook Planning
February 2003 Page 26
Mapping Procedures
Field maps were prepared using Year 2001 digital color ortho-photographs at a scale of 1 inch =
200 feet. All data was geo-referenced and registered with the City parcel data in GIS.
Information shown on the field maps included property boundaries, rights-of-way with street
names, designated open space areas and public lands, map number (and corresponding City Atlas
number), hydrologic basin boundaries, topography, hydric soils, streams and City storm system
data (detention basins, ponds, ditches, etc), existing wetland data (including digitized DSL and
City wetland determinations, NWI wetlands, Wetland Visual Sites (City point data), and 1988
Wetland Study (digitized point data)), and photo-interpreted potential wetland sites.
Wetlands and sample plots were mapped on the field maps. A combination of reference points
was used to establish the location and perimeter of each wetland polygon and the location of
sample plots. These references included property lines (e.g., survey corner markers), topography
(4-foot contours, or less where available), building lines, streets, utilities, trees and other mapped
physical features that could be used to determine location and distances on the ground.
Wetland boundaries and sample plots were digitized and registered with the base map in GIS.
Inventory maps meeting the requirements of OAR 141-086-0210 and the Digital Map Standards
of OAR 141-086-0225 were provided to the City and DSL.
Inventorv Results
Forty-four wetlands were identified as part of the Local Wetland Inventory. Wetlands varied in
size between 5,000 square feet and 15.5 acres, with a total combined acreage of 72.8 acres.
Wetlands were distributed within 10 subwatersheds: Bernert Creek, Camassia, Cascade Springs
Pond Creek, Fern Creek, Fritchie Creek, Tanner Creek, Trillium Creek, Turkey Creek, and the
remaining portions of the Tualatin and Willamette River basins. Several additional
subwatersheds were identified in the study area but did not contain wetlands. Table 3
summarizes the distribution and relative size of wetlands by subwatershed.
Table 3. Wetland Size by Subwatershed
Barlow Creek
Bemert Creek
Bolton Creek
Camassia
Cascade Springs Pond Creek
Fern Creek
Fritchie Creek
Heron Creek
Maddax Creek
201
412
117
219
52
555
393
123
I06
0.00
0.65
0.00
2.55
1.09
4:14
234
0.00
0.00
0
0.2%
0.0%
1.2%
2.1%
0.7%
0.6%
0
0
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003
Page 27
Mary S Young Creek 269 0.00 0
McLean Creek 38 0.00 0
Sunset Creek 77 0.00 0
Tanner Creek 659 5.90 0.9%
Trillium Creek 543 5.50 1.0%
Tualatin River 309 7.30 2.4%
Turkey Creek 20 0.16 0.8%
Willamette River 1165 43.23 3.5%
Study Area Total 5258 72.8 0.14%
With the exception of a few wetlands in the Camassia and Tanner Creek basins, most wetlands
were associated with rivers and streams. As a result, the hydrogeomorphic classification of
wetlands was predominantly Riverine Flow-Through, as shown in Table 4.
Table 4. Wetland Hydrogeomorphic Classifications
Riverine Flow-Through (RFT) 65.51 32
Headwater Slope (SH) 4.59 5
Depressional Outflow (DOF) 1.04 2
Depressional Closed, Permanently Flooded (DCP) 0.89 1
Depressional Closed, Nonpermanently Flooded (DNCP) 0.79 3
Flats 0.04 1
Total 72.8 44
Table 5 summarizes the distribution of wetlands by Cowardin classification within tl�e study
area. Since some wetlands had multiple classifications, total acres of each class is shown
without the number of wetland units affected.
Table 5. Wetland Cowardin Classifications
Forested Wetlands (PFO) 37.48
Scrub-Shrub Wetlands (PSS) 9.61
Emergent Wetlands (PEM) 2539
Open Water (POV� 0.36
Total 72.8
Table 6 provides a detailed summary of the distribution and size of wetlands within each sub-
watershed and the approximate acreages of each wetland type (Cowardin class).
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 28
Table 6. Wetland Size and Class by Subwatershed
,.; � � �..; �
�_
" :; -... . � '� ". ''�� . >:� �Vetl�nd Ar�a �< ;: Cow�rdui �la�s'
: Sub-Watershed .: ! r�rde �acres} �` .PENT : PSS `PF� ' POW:: .
Bernert Creek (BE) BE-Ol 0.34 0.20 0.14
BE-02 032 0.15 0.16
___ ___ _ _ __
.
�''�:�� � 0.35 0.00 0.30 0.00
Camassia (CA) CA-01 0.71 0.54 0.18
CA-02 0.89 0.89
CA-03P 0.35 0.35
CA-04 0.04* 0.04
CA-OS 0.14 0.14
CA-06 0.42 0.42
,=��55 �� ���� 0.77 1.61 O.QO 0.18
Cascade Sprin s Pond Creek (CS) CS-01 1.09 1.09
__ _ _ _ _ __. __ _ _ __
' �.09 - : 1.09 0.00 0.00 0.00
Fern Creek (FE) FE-Ol 1.52 1.52
(incl. Robinwood-RO-tributary) FE-02 2.33 .26 2.07
,
RO-O 1 0.29 .OS 0.24
�� � ��.. �� � ,
� : �'� °�:. _ ': � �3.�'7 �. 1.83 2.07 0.24 0.00
Fritchie Creek (FR) FR-Ol 1.42 1.42
FR-02 0.16 0.13 0.03
FR-03 035 0.35
,
FR-04 0.41 0.41
;�:34 : ` 1.96 0.00 0.38 0.00
Tanner Creek (TA) TA-01 0.37 037
TA-02 0.59 0.49 0.10
TA-03 0.48 0.48
TA-04 0.25 0.25
TA-OS 134 0.53 0.69 0.15
TA-06 0.18 0.18
TA-07 0.69 0.69
TA-08 0.39 0.39
� ,.
TA-09 1.58 0.28 1.27 0.03
� ;' , ' � ''��'� ,..�5.57: "f 1.08 1.50 3.14 0.18
Trillium Creek (TR) TR-01 1.59 0.16 1.43
(incl. Hidden Springs-HI-tributary) TR-02 0.61 0.54 0.07
TR-03 2.06 0.30 0.20 1.56
TR-04 0.93 0.93
HI-01 0.33 0.33
�. �`��� 5 52 _��- 0.46 2.00 3.06 0.00
Tualatin River (Tin TU-01 1.14 1.14
TU-02 0.30 030
TU-03 1.89 1.89
TU-04 0.13 0.13
TU-OS 3.83 3.39 0.44
West Linn Wetiand, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 29
OFWAM Assessment Results
Wetland quality was assessed for each wetland unit using the Oregon Freshwater Wetland
Assessment Methodology (OFWAM). The OFWAM assesses wetland functions (wildlife
habitat, fish habitat, water quality, hydrologic control), values (education and recreation), and
conditions (sensitivity to impact, enhancement potential, and aesthetic quality). The assessment
result is a determination of whether a function, value or condition is high (intact), moderate
(impactedJdegraded), or low (not present/appropriate).
Table 7 provides the results of the OFWAM assessments for each wetland unit in the study area.
Certain categories were not applicable to particular wetlands. For example, if a wetland was not
connected to a stream or other water body, fish habitat functions were not assessed. Also, if
wildlife habitat functions were determined to be "diverse," then enhancement potential was
considered inapplicable as provided in the OFWAM methodology.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 30
* Wetland was below the minimum size threshold but was included due to its local significance and protected status.
** This area includes the wetland portion (60%) of the wetland mosaic area.
Table 7. OFWAM Wetland Assessment Results
� � a " t� ` ; �' � t� c�r+a�o� e �i� n� `: � < '� �t � .�.i�s ��i� .:
„
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impacted � irnpacted potentially high moderately
BE-Ol 0.337 some de aded ��� de aded sensitive o ortunities not appropriate potential leasin
impacted impacted potentially high moderately
BE-02 0316 some de aded intact de aded sensitive o ortunities not appropriate potential �easin
impacted impacted potentially moderately
CA-Ol 0.714 diverse N/A de aded de aded sensitive N/A educational recreational leasin
potentially moderately
CA-02 0.887 some N/A not present intact sensitive moderate educational recreational leasin
impacted impacted potentially
CA-03P 0.346 some N/A de aded de aded sensitive little educational recreational pleasing
potentially
CA-04 0.041 some N/A not present intact sensitive moderate educational recreational pleasing
potentially
CA-OS 0.141 some N/A not present intact sensitive moderate potential recreational pleasing
impacted impacted impacted potentially high
CA-06 0.421 some de aded de aded de aded sensitive o ortunities Potential not appropriate pleasing
impacted impacted impacted potentially high moderately
CS-Ol 1.09 some de aded de aded de aded sensitive o ortunities not appropriate potential leasin
impacted potentially moderately
FE-Ol 1.518 some de aded not present lost sensitive moderate not appropriate not appropriate leasin
impacted impacted potentially moderately
FE-02 2.332 diverse intact de raded de aded sensitive N/A potential potential aeasin
impacted impacted potentially high
FR-Ol 1.424 some intact de aded de aded sensitive o ortunities not appropriate not appropriate not pleasing
impacted impacted potentially high
FR-02 Q.162 some de aded de aded �tact sensitive o ortunities not appropriate not appropriate pleasing
impacted impacted impacted potentially high moderately
FR-03 0.349 some de aded de aded de aded sensitive o ortunities not appropriate not appropriate leasin
impacted impacted potentially high
FR-04 0.409 some de aded de aded �tact sensitive o ortunities not appropriate not appropriate not pleasing.
West Linn Wetland, Riparian and Wildfife Habitat Inventory
Winterbrook Planning
February 2003 Page 31
E 8 ! '� � - � ♦ . R 6 �'`P;� F E �. \
� �?4�e�iandE �ildl�e � � ;���ro1+� �#��� U��� � �tet��
� ,. �: � �� � , � i � , � � � � ,, �� � ° ���� ��, ;
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_____� � �. � „ ,,
impacted potentially moderately
HI-Ol 0.326 some N/A not present de aded sensitive moderate educational recreational leasin
impacted impacted potentially high moderately
RO-Ol 0.291 some de aded de aded �tact sensitive o ortunities educational potential leasin
impacted impacted potentially moderately
TA-01 0.369 some de aded de aded �►tact sensitive moderate potential potential leasin
TA-02 0.588 some intact impacted intact Potentially �� not appropriate potential pleasing
de aded sensitive o ortunities
impacted impacted potentially high moderately
TA-03 0.479 some de aded de aded �tact sensitive o ortunities educational recreational leasin
impacted impacted potentially high moderately
TA-04 0.253 some intact not appropriate potential
de aded de raded sensitive o ortunities leasin
TA-OS 1.338 diverse �pacted impacted intact Potentially N/A not appropriate potential not pleasing
de aded de aded sensitive
potentially
TA-06 0.177 some N/A not present lost sensitive moderate not appropriate not appropriate not pleasing
impacted potentially high
TA-07 0.693 some N/A de aded lost Sensitive o ortunities not appropriate not appropriate not pleasing
impacted impacted impacted potentially high moderately
TA-08 0.386 some de aded de aded de aded sensitive o ortunities not appropriate potential leasin
impacted impacted potentially high moderately
TA-09 1.584 some intact not appropriate potential
de aded de aded sensitive o ortunities leasin
TR-Ol 1.586 diverse intact �pacted impacted potentially N/A potential not appropriate moderately
de aded de aded sensitive leasin
impacted impacted impacted potentially moderately
TR-02 0.594 diverse de aded de aded de aded sensitive N/A potential not appropriate leasin
impacted potentially high moderately
TR-03 2.062 some intact de aded �� sensitive o oriunities not appropriate not appropriate leasin
impacted potentially high
TR-04 0.931 some intact de aded �tact sensitive o ortunities not appropriate not appropriate not pleasing
impacted impacted impacted potentially high moderately
TU-Ol 1.143 some de aded de aded de aded sensitive o ortunities educational recreational leasin
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 32
� E
�
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,� - y sq
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. ., .11 �E �'� � �� M7Y` ,,...��� ,�,.;. ��� , ... „5��,����� �"V��� �� �. .. �,>�'�F7� � ., � � �.,t�� E� �� � ��.:.::
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impacted impacted potentially moderately
TU-02 0.302 some N/A de aded de aded sensitive moderate educational recreational leasin
TU-03 1.889 some �Pacted impacted impacted potentially high potential recreational not pleasing
de aded de aded de raded sensitive o ortunities
impacted impacted impacted potentially moderately
TU-04 0.132 some de aded de aded de aded sensitive moderate educational potential leasin
impacted impacted potentially high moderately
TU-OS 3.815 some de aded de aded �tact sensitive o ortunities Potential recreational leasin
TY-Ol 0.163 some �Pacted impacted impacted not sensitive moderate educational recreational moderately
de aded de aded de aded leasin
impacted impacted potentially high rnoderately
WI-Ol 8.091 some de aded de aded �ntact sensitive o ortunities educational recreational leasin
impacted impacted potentially high moderately
WI-Ol a 0.842 some N/A not appropriate potential
de aded de aded sensitive o ortunities leasin
impacted impacted potentially high
WI-02 15.547 some de aded de aded �tact sensitive o ortunities Potential potential not pleasing
impacted potentially
WI-03 2.845 diverse intact de aded intact sensitive N/A potential recreational not pleasing
impacted impacted potentially high moderately
WI-04 7.13 some de aded de aded intact sensitive o ortunities educational recreational leasin
impacted impacted impacted potentially rnoderately
� WI-OS 0.21 some de aded de aded de aded sensitive moderate educational recreational leasin
impacted impacted high rnoderately
WI-06 2.704 some de aded de aded �tact sensitive o ortunities not appropriate recreational leasin
WI-07 6.28 some impacted �tact intact sensitive high not approptiate recreational pleasing
de ded o ortunities
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 33
Table 8 summarizes the relative distribution of assessments for each function and condition, with
the percentage of total wetlands ranking high in each category.
Table 8. Wetland Assessment Results for the Study Area
_ ___ _ _ __ ___ _ _ _
; °10 R�etlands
Tu�ction / Condition Hi h 1Vloderate ` Lav� N/A ': Assessed Hi
_ 6 38 0 14%
Wildlife habitat
Fish habitat 8 26 0 10 18%
Water quality 3 35 6 7%
H drologic control 20 21 3 45%
Sensitivi to im act 2 41 1 5%
Enhancement otential 26 11 1 6 59%
Education 14 10 20 32%
Recreation 18 14 12 41 %
Aesthetic quality 7 2g 9 16%
Each wetland was assessed to determine whether it should be considered a Wetland of Special
Interest for Protection (WSIP). The questions in the WSIP category cover the presence of
federal or state listed species and habitats, existing local, state or federal protections, and existing
management plans. The following wetlands were found to be WSIP wetlands: TU-Ol (red-
legged frog breeding site) and CA-01 through CA-OS (part of Nature Conservancy's Camassia
Preserve).
During field investigations, no vacant, former wetlands of five acres or larger in size were
identified. Therefore, no potential wetland mitigation or restoration sites were noted in the LWI.
Siqnificant Wetlands Determination
In Oregon, local government planning responsibilities include the determination, designation,
and protection of significant wetlands. Wetlands are considered significant if the OFWAM
evaluation determines that they:
1. provide diverse wildlife habitat, intact fish habitat, intact water quality function, or intact
hydrologic control function;
2. are located within 1/4-mile of a"water quality limited stream" and have "intact" or
"impacted or degraded" water quality function;
3. contain rare plant communities or federal or state-listed species; or
4. have a surface water connection to a stream that is habita.t for indigenous anadromous
salmonids and have "intact" or "impacted or degraded" fish habitat function.
As noted above, the City of West Linn chose to apply the two optional significance criteria:
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 34
l. wetlands that represent a locally unique native plant community; or
2. wetlands that are publicly owned and have educational uses.
A total of 38 wetlands met the criteria and were determined to be significant. These wetlands
generally had 1) high wildlife or fish habitat, water quality, or hydrologic control function, 2) a
surface water connection to a salmonid stream, or 3) were located within 1/4-mile of a water
quality limited stream. Approximately one-half (20) of the significant wetlands were less than one-
half acre in size. The six wetlands not meeting the criteria were:
■ FE-01
■ HI-01
■ TA-06
■ TA-07
■ TA-08
■ TU-04 (stormwater swale created from upland, excluded)
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 35
Riparian Corridors
The inventory of riparian corridors was conducted concurrently with the wetlands inventory.
The first phase of the inventory was the planning phase in which methods, basins and riparian
reaches were defined, field base maps prepared, and significance criteria determined. This phase
occurred between June 2001 and March 2002. Public notice of the project and opportunities for
input was provided through printed media, notices at City Hall and the City Library, and through
a series of neighborhood meetings. A public open house was held in Apri12002. In March, the
field inventory phase began. This phase included the field surveys, functional assessments, and
significance determination and concluded in June 2002.
Unlike the preceding wetlands inventory, the DSL has not adopted special rules related to riparian
corridors. Riparian inventories follow the standard inventory requirements of the Goa15
Administrative Rule (OAR 660-023-0030). This rule, as amended in 1996, provides a"safe
harbor" process to identify and protect significant riparian corridors. The City determined that
the safe harbor process for determining significant streams and riparian corridors would leave
many of the city's streams out because many of West Linn's smaller streams are not "fish-
bearing" as defined by the Oregon Department of Forestry. Nevertheless, these stream corridors
are a highly-valued asset to the West Linn community. Thus, for the purposes of the inventory,
the City chose to follow the standard Goa15 process.
Inventorv Methods
Two levels of investigation were conducted for the inventory of riparian corridors: a review of
existing information and a field inventory.
Review of Existing Information
A review of existing literature, maps, and other materials was conducted to gather information on
riparian corridors along rivers, lakes, ponds, and streams within West Linn. The sources of
information identified in the LWI methods section were consulted for the riparian inventory.
This information was the basis for preparing a GIS base map showing potential riparian
corridors, including the approximate location of all streams and rivers, 100-year floodplains and
1996 flood boundaries, topography, major streets or landmarks, and study area boundaries. To
refine this information, stereo-pair photographs from 1996 and 1999 were interpreted using a
Topcon stereoscope. The resulting potential riparian sites were included on the base map.
The study area was divided into hydrologic basins — that is, the drainage areas for individual
streams, wetlands, lakes, or ponds. Each hydrologic basin was assigned a code based on the
recent City adopted list of stream names. This code was generally the first two letters of the
stream name, or the first and last letters where more than one stream had the same first letters.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 36
The riparian areas within each basin were then be divided into segments, or reaches. Reach
breaks were determined by a variety of factors including significant changes in stream gradient,
surface flow condition (e.g., a long piped section), or land use. A riparian reach code was
assigned identifying the hydrologic basin and the reach number.
Field Inventory
The inventory field work was performed between March arzd June, 2402. The West Linn
riparian inventory method was developed building on the basic guidelines found in DSL's Urban
Riparian Inventory and Assessment Guide (URIAG). URIAG relies on a combination of best
available knowledge, field observations, and best professional judgment. Riparian functions are
assessed for water quality, flood management, thermal regulation; and wildlife habitat. The
results indicate whether the functional integrity of each reach is high, medium, or low.
For the West Linn inventory, a Riparian Characterization Form was developed that provides
detailed information on the physical and biological characteristics of the riparian corridor. In
addition to a summary description of the reach and basic information on location and associated
wetland and habitat sites, the following data were collected:
• Stream type/order
• Channel type
• Reach length
. Reach gradient
• Side slopes
• Active channel width and depth
• Channel width - valley width ratio:
• Vegetated riparian width
■ Stream flow
• Channel shade
• Sub-watershed
• Vegetation (dominant, %native)
• Bank/channel condition:
• Dominant soil type
• Soil erosion potential
• Water quality limited stream/parameter
. Floodplains
• Fish-bearing streams
• Fish barriers
• Road density (crossing per linear feet)
• Large wood features
• Recruitment potential
• Other water resources
• Restoration/Enhancement Opportunities
A Riparian Functional Values Assessment form was developed based on the DSL guidelines to
evaluate the riparian area's functions. Water quality protection, flood management, fish habitat,
and wildlife habitat functions were evaluated for each reach, as well as its relative uniqueness
and ecological integrity (see discussion below). Using these forms, each riparian reach was
assessed from public parks and rights-of-way or from private lands where access permission was
granted. Multiple observation points were used for each stream reach, including observation
along the stream channel where accessible. Riparian characteristics were recorded on individual
Riparian Characteriza.tion Forms contained in Appendix E.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003
Page 37
Functional Assessment and Significance Determination
Five riparian evaluation factors measuring discrete riparian functions were evaluated and ranked
based on qualitative and quantitative parameters. The five factors and their associated functions
are described below:
Water quality�rotection: This factor assesses the potential of the riparian corridor to protect
water quality in streams and other water features associated with the corridor. Functional
parameters include the density and type of vegetation cover, width of vegetation cover along
the water feature, extent of impervious surfaces, steepness of corridor side slopes (in
conjunction with vegetation density), and erosion potential of soils (in conjunction with
vegetation density). Combined values for this function ranged from 5 to 15. The highest
rated sites have dense woody vegetation, wide buffers, and low impervious surfaces. With
steeper slopes and erosion-prone soils, the risk of water quality degradation increases and the
riparian vegetation functions (e.g., erosion control, slope stabilization) grow more important.
Flood mana eg ment: This factor assesses the potential of the riparian corridor to provide
water storage and conveyance during flood events. Functional parameters include the
capacity of the floodplain (valley to channel width ratio and frequency of flood events),
presence of stream-associated wetlands, extent of woody vegetation cover, degree of bank
armoring, and location of the site within the basin. Combined values for this factor ranged
from 5 to 15. The highest rated sites have large and active floodplains, dense woody
vegetation, low bank armoring, and are located in upper part of the basin.
Fish Habitat: This factor assesses the potential of the riparian corridox to provide functional
habitat and migration opportunities for fish. Functional parameters include the degree of
channel alteration, degree of channel shade, potential for large woody debris (LWD)
recruitment, presence of barriers to fish migration, and presence of fish documented by
�ODFW. Combined values for this factor ranged from 5 to 15. The highest rated sites have
low channel alteration, high degree of shade, high LWD recruitment potential, and are
documented fish-bearing streams.
Wildlife habitat: This factor assesses the potential of the riparian corridor to provide
important habitat values for wildlife. Functional parameters include the presence and
seasonality of water, degree of habitat diversity, opportunities for sanctuary and refuge,
habitat patch size, and habitat connectivity. Combined values for this factor ranged from 5 to
15. The highest rated sites have multiple water types including permanent water sources,
high habitat diversity, diverse sanctuary and refuge opportunities, contiguous habitat size of
greater than 10 acres, and are well-connected to upland and riparian habitats.
■ Raritv / Inte�: This factor assesses the ecological integrity and uniqueness of natural
communities within the riparian corridor. Functional parameters include the presence of
federal or state-listed species, Oregon Natural Heritage Program (ONHP) priority habitats,
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 38
locally rare species or habitats, e�ent of native vegetation cover, and degree of huxnan-
caused disturbance. Combined values for this factor ranged from 5 to 15. The highest rated
sites have one or more listed species, priority habitats, or locally rare species or habitats, high
native vegetation cover, and low levels of disturbance.
Riparian significance criteria were based on the functional assessment (high, medium or low)
and associated scores. A riparian corridor was deemed significant if it received a high ranking
for any of the five assessment factors, a combined score of 50 or more, or contained a perennial
fish-bearing stream. A riparian corridor was also deemed significant if any federal or state-listed
species, priority habitats, or locally rare species or habitats were documented within the reach.
Appendix F contains the Riparian Functional Values Assessment form with the functional
assessment and significance determination for each riparian site.
Inventorv Results
Seventeen subwatersheds containing 23 riparian corridors with 34 separate reaches were
identified during the riparian inventory. All riparian corridors were associated with streams or
rivers (i.e., Willamette and Tualatin Rivers). The width of riparian areas was determined by the
potentiai tree height of the dominan# tree species, which typicaliy was black cottonwood,
Douglas fir, or western red cedar. All of these species have a potential tree height of
approximately 120 feet. The actual width of vegetated riparian areas was recorded on the
characterization forms and varied between 0 and 120 feet. Table 9 lists West Linn
subwatersheds, reaches, and reach boundary, length, and gradient within the study area. The
reaches in the table are generally organized from north to south.
West Linn Wetland, Riparian and Wildtife Habitat Inventory
Winterbrook Planning
February 2003 Page 39
Table 9. West Linn Riparian Corridors
�� � r �a ° � � � �` ` ' �� � � �� �, �` �Reach ��,� � �.�
r
Subt�,a�ershed ' .. .: =.l�eac�. .,�.I �, I�i ar�an+�ade � � ', �C� °, bau�i�d �ri�s �: Ie th feet �.each'i irad�en
Willamette River Lower Willamette WI-R-1 N. City limits (Hog Island) to Cedar 7450 <2%
(1165 acre basin) Island (RM 22.2-23.5)
Clackamas Confluence WI-R-2 Cedar lsland to Willamette Falls (RM 16,035 <2%
23.5-26.7)
Upper Willamette WI-R-3 Willamette Falls to Tualatin River 9408 <2%
(RM 26.7-28.5)
Willamette Lowlands WI-R-4 Bernert Creek to Willamette Park 4481 <2%
Fern Creek Lower Fern Creek FE-R-1 Willamette River to Wallin Wa 4050 2-4%
(555 acre basin) Upper Fem Creek FE-R-2 Hwy. 43 to Carriage Way Open 4863 10%
S ace
Arbor Creek AR-R-1 Fern Creek to S e Parkwa 5009 9%
Robinwood Creek RO-R-1 Fern Creek confluence to Hillcrest 5158 10.5%
Trillium Creek Lower Trillium Creek TR-R-1 Willamette River to H. 43 6063 7%
(543 acre basin) U er Trillium Creek TR-R-2 Hw . 43 to Rosemont Rd. 5500 9%
Lower Robin Creek RN-R-1 Trillium Creek to H. 43 1507 13%
U er Robin Creek RN-R-2 Wallin Circle to Carria e Wa 2035 16%
Gans Creek GA-R-1 Kentho e to H. 43 808 6%
Heron Creek Lower Heron Creek HE-R-1 Willamette River to H . 43 3756 6%
(123 acre basin) U er Heron Creek HE-R-2 Larks ur to Pimlico Dr./Sorrel 960 19%
Turkey Creek Turkey Creek TY-R-1 Willamette River to MS Young State 1847 8%
20 acre basin Park
Mary S Young Creek Lower M S. Young Creek MA-R-1 Willamette River to H. 43 3248 7%
(269 acre basin) Up er M S. Youn Creek MA-R-2 H. 43 to Miles 3336 1S%
Barlow Creek Lower Barlow Creek BA-R-1 Willamette River to H . 43 1653 11 %
(201 acre basin) U er Barlow Creek BA-R-2 H. 43 to Sahallie Illahee Park 1806 13%
Bolton Creek Bolton Creek BO-R-1 Willamette River to Woodwinds Ct. 1043 12%
(117 acre basin
Maddax Creek Maddax Creek MX-R-1 Willamette River to Hwy. 43 1550 7%
106 acre basin)
Cascade Sp Pond Creek Cascade Spring Pond Creek CS-R-1 Willamette River to Cascade St. 2232 10%
(52 acre basin
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2Q03 Page 40
� � : � ,, � ��,
� � ; ' , �� � �� �h �� y� � :...
, � ea
.�'1�1t�W8t4'I'"$�1 .. � � �""� , ,,. ,. � � � .. : . ` `. � Y - . ,
� �' �.. ,. �eaeh . t� .. . ,. . � �:: ' Rea� , �d���... ... le�t � �"+�� `� � �e�c�► dien
McLean Creek McLean Creek MC-R-1 Willamette River to Hwy. 43 1113 7%
(38 acre basin)
Camassia Camassia CA-R-1 I-205 to Wilderness Park 3203 9%
(219 acre basin)
Sunset Creek Sunset Creek. SU-R-1 Sunset to Charman St. 758 7%
(77 acre basin)
Tanner Creek Lower Tanner Creek TA-R-1 Willamette River to Beacon Hill Ct. 5233 7%
(659 acre basin) Up er Tanner Creek TA-R-2 Beacon Hill Ct. to Rosemont Rd. 4230 4%
Salamo Creek (tribut ) SA-R-1 Tanner Creek to Weatherhill Rd. 1747 5%
Bernert Creek Bernert Creek BE-R-1 Willamette River to I-205 6527 2%
(412 acre basin)
Tualatin River Lower Tualatin River TU-R-1 Willamette River to Borlan bridge. 8483 <2%
(309 acre basin) Upper Tualatin River TU-R-2 Borlan Bridge. to City Limits 4939 <2%
(Fritchie Creek)
Fritchie Creek North Fritchie Creek FR-R-1 Tualatin River to Wisteria Court 3969 4%
(393 acre basin) South Fritchie Creek FR-R-2 North Fritchie Creek to A1 ine Dr. 5660 8%
West Linn Wetiand, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 41
Assessment Results
Riparian corridor quality was assessed using a Riparian Functional Values Assessment adapted
from the URIAG guidelines. Each corridor was evaluated for is water quality, flood
management, fish habitat, and wildlife habitat functions, as well as its relative uniqueness and
ecological integrity. Combined values for each category ranged from 5 to 15, resulting in ratings
of low (5-8), medium (9-11), and high (12-15). The total possible score for each riparian site
was 75. Table 10 summarizes the results of the riparian functional assessment.
Table 10. Riparian Functional Assessment Summary
�. .
�� �ar�a�r �atsr ; ti .g: Flo�� . �h ; . 'V�"����� , Ra� 1 ��.'T'E s,�����! �
, K � '�&�c :
����Rea�h u�T� ,.y H . ma�a �eint.. �.. 'I�i�i��� �a���t'',,.._� in ri ', ��c�nr� � ' ha��ta��t� ...;
WI-R-1 L L H M M 47 Y
WI-R-2 M M H H M 60 Y
WI-R-3 M H M H H 57 Y
WI-R-4 M H M H M 56 Y
FE-R-1 H M H H H 62 Y
FE-R-2 H M L H M 58 Y
AR-R-1 H M H M M 55 N
RO-R-1 H M M H H 61 Y
TR-R-1 M M M M M 51 Y
TR-R-2 H M H H H 64 Y
RN-R-1 H L M L L 43 N
RN-R-2 H M M M L 53 N
GA-R-1 M L M L L 39 N
HE-R-1 H M H H M 59 N
HE-R-2 H M M H M 58 N
TY-R-1 H M H H M 60 N
MA-R-1 H L M H M 58 Y
MA-R-2 H M M M L 49 N
BA-R-1 M L M L M 42 Y
BA-R-2 H M L M M 50 Y
BO-R-1 H L M H H 58 Y
MX-R-1 H M M H M 58 N
CS-R-1 H M M M L 50 Y
MC-R-1 M L M M M 47 Y
CA-R-1 H M M H H 60 Y
SU-R-1 L L L L L 29 N
TA-R-1 M M M M M 51 Y
TA-R-2 M H M M L 51 Y
SA-R-1 H M M L L 43 N
BE-R-1 M H L L L 40 N
TU-R-1 H M H H M 62 Y
TU-R-2 M M H H H 60 Y
FR-R-1 H H M H M 62 Y
FR-R-2 H M M M M 51 Y
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 42
Siqnificant Riparian Corridor Determina#ion
Riparian significance criteria were based on the functional assessment (high, medium or low),
total combined score, and the presence of federal or state-listed species, priority habitats, or
locally rare species or habitats occur within the reach. A riparian corridor was deemed
significant if it received a high functional ranking in any category, had a total combined scare of
50 or more, or if rare or listed species or habitats were present.
A total of 33 riparian sites met the criteria and were determined to be significant. Only one site,
Sunset Creek (SU-R-1), did not meet the criteria. This reach is highly degraded and isolated, and
enters a long series of pipes before discharging to the Willamette River.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 43
Wildlife Habitat
The inventory of wildlife habitats was conducted concurrently with the wetland and riparian
inventory. The first phase of the inventory, from June 2001 and March 2002, was a planning
phase in which methods, field base maps, and significance criteria were developed. Public
notice of the project and opportunities for input was provided through printed media, notices at
City Hall and the City Library, and through a series of neighborhood meetings. A public open
house was held in Apri12002. The second phase of the project covering the field inventory
concluded in June 2002.
Inventorv Methods
As for other resources, two levels of investigation were conducted for the inventory of wildlife
habitats: a review of existing information and a field inventory.
Review of Existing Information
A review of existing literature, maps, and other materials was conducted to gather information on
wildlife habitats within West Linn. Information sources included those identified in the LWI
methods section. A general literature search was also conducted to obtain published information
about habitat types in the Willamette and Tualatin River basins, wildlife species typically
associated with these habitats, and existing habitat management programs. Information
concerning the potential or documented occurrence of high-priority habitats and threatened,
endangered and sensitive species was also reviewed. The Nature Conservancy and Oregon
Natural Heritage Program (ONHP) databases were searched and ONHP, USFWS, and other
agencies were contacted for current information on special status species and habitats. �
A GIS base map showing potential wildlife habitats was prepared based on vegetative cover,
stream and riparian corridors, wetlands, existing published data (e.g., 1988 West Linn Wetland
Study, PGE wildlife studies, fish data) and other data sources (e.g., ONHP, ODFW, Metro).
Cover type classifications were developed to describe the dominant vegetation and habitat
function. Aerial photographs were interpreted using a Topcon stereoscope and cover types were
delineated on 2001 aerial orthophotos and then digitized using GIS to complete the map of
potential wildlife habitats. Potential habitat sites were defined in a manner consistent with other
resources, with coding generally based on hydrologic basins.
Field Inventory
Wildlife habitat sites were evaluated using the Wildlife Habita.t Assessment (WHA)
methodology, adapted for use in West Linn. This method has proven effective for assessing and
ranking Goa15 habitats throughout the Willamette Va11ey. The WHA methodology is a
scientifically accepted system for determining the relative value of different habitat types within
a region. The Wildlife Habitat Assessment has proven to be: reliable (provides information to
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 44
help make decisions); acceptable {meets statewide planning requirements); repeatable (generates
similar results when done by different entities); and understandable (communicates results to a
lay person).
The WHA ra.ting system evaluates each site in terms of its potential for wildlife. The WHA
method is designed primarily to assess three major components of wildlife habitat: presence and
quality of water, food and cover. A water source and a variety of cover and food types are highly
valuable for many species of wildlife, and sites with these features can generally accommodate a
greater number of species than sites that lack them. The rating system is weighted, and reflects
the presence or absence of each of these factors, plus three additional factors: disturbance,
connectivity, and special interest species or habitats. Each WHA assessment factor is sununarized
below.
Water: Water resources on a site are evaluated based on four characteristics: quantity and
seasonality; quality; proximity to cover; and diversity. All of these factors play an important
role in the site's significance to wildlife. The highest rated sites have several types of
permanent, high quality water, with nearby vegetation cover.
Food: Food is a basic requirement for any organisrn. Wildlife species cannot survive in one
area for any appreciable period of time without food. The greater the variety and quantity of
food, the greater the potential for serving the needs of more wildlife species. The three
factors considered in the assessment of forage habitat aze quantity and seasonality, variety,
and proxirnity to cover. The highest rated sites have a wide variety of food plants available
all year, in good quantity, with adjacent cover.
■ Cover: Cover habitat is important to wildlife, and important factors include structural
diversity (vegetation layers present), variety and seasonality of cover (species diversity,
evergreen vs. deciduous), nesting/denning (snags, logs, rocks}, and access/escape (refuge
opportunities). The highest rated sites have multiple layers of vegetation, snags and logs, and
a wide variety of evergreen and deciduous species in all layers.
■ Human Disturbance Assesses other factors that influence the relative value of habitat areas
including physical disturbance (invasive species, bulldozed, landslides) and human activity
(traffic, machinery and cars, pets). The highest rated sites have little or no disturbance.
■ Connectivitv: Connectivity to other habitats is important to allow migration and serve the
life cycle needs of many wildlife species. The highest rated sites have high connectivity to a
range of other habitats, including wetland, riparian, and upland areas.
■ Sensitive Species or Habitats: Assesses the presence or potential occurrence of sensitive
species or habitats within the site. Published and field-collected data on rare habitats or ,
species, or potential habitat for rare species, is recorded. If such species or habitats are
present, the site receives additional weighted points.
The scoring of each factor on the sheet is weighted based on its estimated importance for wildlife.
In particular, sites with water will rate higher in this system, as most terrestrial wildlife species
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 45
need access to water, and all species need some amount of cover while drinking at a water source.
However, habitat assessments are also intended to reflect the needs of the types of species that
would be expected to occur within the habitat site. Thus, an upland habitat site without on-site
water may outscore a riparian site in some cases, by providing highly rated forage or nesting
habitat for certain species, or the presence of rare species or habitats (e.g., a remnant oak
savanna). The proposed WHA method, as adapted for West Linn, provides an assessment
approach that adds greater emphasis on the value of natural communities, particularly those that
are rare or threatened.
Significance Determination
Wildlife habitat significance was determined based on several factors, including the WHA rating
and the presence of listed or rare species. A habitat site is significant if it:
■ Receives a Wildlife Habitat Assessment score of 45 points or more;
■ Receives a Wildlife Habitat Assessment score of 30 to 44 points and provides a linkage
between other significant Habitat Sites, Riparian Corridors, or Wetlands;
■ Provides habitat for a wildlife species listed by the federal government as a threatened or
endangered species or by the state of Oregon as a threatened, endangered, or sensitive
species;
■ Supports locally rare species or habitats (e.g., remnant Oak Savanna habitat);
■ Is documented (by a state or local resource agency) as a sensitive bird nesting, roosting, or
watering resource site for osprey, great blue herons, or other species;
■ Is documented to be essential to achieving policies or population objectives specified in a
wildlife species management plan adopted by the Oregon Fish and Wildlife Commission;
or
■ Is identified and mapped by the Oregon Fish and Wildlife Department as habitat for a
wildlife species of concern and/or as a habitat of concern.
Inventorv Results
Twelve habitat sites ranging in size from 39 to 323 acres were identified during the wildlife
habitat inventory. Most sites were associated with streams or rivers and included riparian
corridors andlor wetlands.
Table 11 summarizes the size, general boundaries, and associated wetland and riparian sites for
habitat sites within the West Linn study area. The sites are organized alphabetically by site
name.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 46
Table 11. Summary of Wildlife Habitat Sites
� �, ,t� ' ����.�'���'�'�� �. � `� � ' �� � F � y � }�. � � ' �1�`+�T����� ::!
% t �`
I�abzta��it+�.. : �oc� :; ,:. Ac . ' , . �.�'; �� ,., e � ;' �d���+es .. ,; , ° . � . � , . �.ea��e� . � .
Camassia/ CA-H-1 135 I-205 and Maple Ave (south), Prospect CA-01— CA-06 CA-R-1
Wilderness Park St (west), Skyline Dr (north), and West
A St (east)
Fritchie Creek FR-H-1 68 Interstate 205 north to study limits FR-01 FR-R-1
(UGB) and east to vicinity of Bland FR-R-2
Circle; includes 2 sub-areas
Lower Fern Creek FE-H-1 49 N. City limits south to Lower Fern Creek FE-02 AR-R-1
along old River Dr. — Willamette River RO-R-1
west to H 43. FE-It-1
Lower Trillium TR-H-1 70 Bordered to east by Willamette River TR-04 GA-R-1
Creek and Calaroga Dr., west by Hwy. 43, TR-03 RN-R-1
south by Mapleton Dr., north by city TR-R-1
limits
Mary S. Young / MA-H- 323 Willamette near Calaroga Dr. south to WI-04 WI-OS HE-R-1
Willamette 1 lower MS Young Cr. — Willamette River WI-06 MA-R-1
Lowlands west to Hwy 43. TY-01 TY-R-1
WI-R-1
WI-R-2
Mary S. Young/ MA-H- 150 Hidden Springs Rd, south to Webb St. — TR-O 1 TR-R-2
Upper Trillium 2 Hwy 43 west to Rosemont Rd. TR-02 HE-R-2
Ridge HI-O 1 MA-R-2
BA-R-2
Tanner Creek TA-H-1 ll0 Rosemont Rd. (north), Interstate 205 TA-1— TA-09 SA-R-1
(south), Summit and Sussex Streets TA-R-1
(east); west boundary near Salamo TA-R-2
Rd.
Tualatin River TU-H-1 137 Confluence of Willamette and Tualatin TU-01 through TU- T`U-R-1
north west to Fritchie Cr. O5, FR-02, FR-03, TU-R 2
FR-04 FR-R-1
FR-R-2
Upper Bernert BE-H-1 39 Tannler Drive (west), Haskins Road BE-R-1
Creek (north), and I-205 south
Upper Fern/ FE-H-2 165 North city limits south to Hidden RO-01, FE-01 AR-R-1
Skyline Ridge Springs Rd., Hwy. 43 west to city limits RO-R-1
FE-R-2
RN-R-2
Upper Willamette WI-H-2 265 Bordered on the east by Willamette WI-01 WI a, BE-R-1
/ Wetland River, west by I-205, south by Tualatin � WI-03 TA-R-1
Complex River (Willamette Park), north by BE-01 BE-02 �'R-3
Willamette Falls. WI-R-4
Willamette Falls / WI-H-1 247 Lower Barlow Creek south to CS-01, WI-07 BA-R-1
Clackamas Willamette Falls, south of Interstate 205 BO-R-1
Confluence and east of Hwy 43; includes Goat Island CS-R-1
MC-R-1
MX-R-1
WI-R-2
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 47
The wildlife habitat field inventory using the WHA methodology was performed between March
and June, 2002; some additional field data was collected during the summer of 2001. In addition
to the information collected as part of the WHA process, site boundaries were field verified and
data was collected on discrete habitat types found within each site.
Sixteen distinct habitat types (vegetation cover types) were identified during field investigations
within the study area. Upland and riparian habitats included Conifer Forest, Mixed Conifer 1
Hardwood Forest, Hardwood Forest, Bottomland Forest, Oak Woodland, Shrub, Mixed Shrub /
Herbaceous, and Meadow / Grassland. Wetland habitats included Palustrine Forested, Scrub-
Shrub, Emergent, and Open Water Wetlands. Additional cover types include: Parkland,
Agriculture / Pasture, Developed/LTrban Land, and Quarry. Several of these habitat types were
further divided into subclasses based on dominant vegetation. The habitat inventory and GIS
mapping includes information on the habitat types and associated vegetative characteristics
within each habitat site.
Habitat Site Summaries
Camassia / Wilderness Park
This is a regionally unique site with an extraordinary diversity of habitats and plants. More than
300 species of plants are found at the site, including rare Willamette Valley species such as the
white rock larkspur which occurs here and at only six other places in the world. Also rare to the
valley are the vernal pools and quaking aspen bog. The Oregon white oak-madrone woodlands
that grow on the shallow soils of this rocky plateau are locally rare. The rock was exposed by
the Bretz Floods 12,000 to 19,000 years ago which scoured soii and vegetation from parts of the
valley and deposited granitic boulders from as far away as Canada (a small granite boulder was
noted during field surveys). The site includes the 25-acre Camassia Preserve, 65-acre VVilderness
Park, and West Linn High School habitats. The site marks the juncture of the mesic mixed
conifer-hardwood forests along the north-south ridge and the drier, oak and grassland dominated
communities associated with the shallow stony soils on the south facing hills.
Fritchie Creek
This site is composed of two sub-areas of the upper Fritchie Creek basin: 1) north and middle
forks of Fritchie and 2) south fork. The site contains a diverse, cedar dominated riparian forest
with palustrine emergent wetlands at base of the canyon slopes. The corridor connects with the
large forested habitats to the west af the study area. The southern sub-area is a forested,
generally narrow corridor consisting primarily of the North �Villamette Park and Tanner Open
Space. The site includes a mixed forest community with the oldest Pacific madrone trees (more
than 40" diameter) observed in the City. Habitat types at this site include Conifer Forest, Mixed
Conifer/Hardwood Forest, Hardwood Forest, Mixed shrub/herbaceous, Meadow/grassland, and
Palustrine Emergent wetlands. Potential enhancement opportunities include replacement of the
culverts under I-205 with large arch culverts or bridges that could restore free passage af fish and
wildlife between the site and Tualatin River riparian habitats.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 48
Lower Fern Creek
A contiguous patch of habitat with more than two miles of uninterrupted stream corridors,
including Fern Creek and the lower reaches of Arbor and Robinwood Creek tributaries. The
fish-bearing streams flow through steep forested ravines, merging on a broader floodplain terrace
with braided stream channels west of and parallel to Old River Drive. The site contains a mosaic
of upland, riparian, and wetland habitats with its core located within an appro�cimately 13-acre
future community park site at the end of Fairview Way. The forested stream corridor continues
north with only one crossing (Old River Drive) before connecting to Willamette riverine and
riparian habitats across from Hog Island. Habitat types at this site include Mixed
Conifer/Hardwood Forest, Hardwood Forest, and Meadow/grassland, with Palustrine Scrub-
Shrub wetlands.
Lower Trillium Creek
The Lower Trillium Creek site contains a perennial stream corridor and tributaries supporting
cutthroat trout, with a generally good connection to the Willamette River. This site has multiple
associated wetlands and ponds providing diverse habitat. Nearby housing and roads constrain
and fragment the corridor in certain areas, limiting wildlife migration and refuge opportunities.
Wetland, riparian and upland habitats are located in forested ravines, the lower sections af which
have broad floodplain terraces with braided stream channels. Dominant canopy cover consists of
Douglas fir, bigleaf maple, red alder, and western red cedar. Habitat types at this site include
Mixed Conifer/Hardwood Forest (44 acres), Hardwood Forest (1 acre), Meadow/Grassland (1
acre), and Palustrine Scrub-Shrub (1 acre) wetlands.
Mary S Young / Upper Trillium Ridge
Central section of forested north-south ridge and associated stream corridors extending from
above Mary S. Yound Park south to Wilderness Park. Multiple streams emerge from springs as
far west as Rosemont Road; some springs are associated with ash forest and scrub-shrub
wetlands. The streams flow through natural ravines dominated by Douglas fir and bigleaf maple.
A forest links the multiple ravines along the steep ridge above Hwy. 43. This site contains
several significant park and open space lands, including the Hidden Springs Open Space (38
acres), Sahallie-Illahee/Ibach Park group (7 acres), and a portion of Sunburst Park. This site
contains moderate to high quality upland, riparian and wetland habitats. Habitat types include
Conifer Forest (27 acres), Mixed Conifer/ Hardwood Forest (93 acres), Hardwood Forest (8
acres), Oak Woodland (3 acres), Shrub (2 acres), Mixed Shrub/Herbaceous (4 acres), with
Palustrine Forested (12 acres) and Scrub-Shrub (6 acres) wetlands.
Mary S. Young / Willamette Lowlands
Large habitat site includes the 127-acre Mary S. Young State Park and the 26-acre Cedaroak
Boat Ramp/Cedar Island park site; contains a diverse range of habitats, including upland forests
integrated with multiple riparian corridors (Heron, Turkey and MS Young Creeks) and several
wetlands, directly linked to bottomland habitats along a 1.7-mile reach of the Willamette River.
This reach provides channel complexity with off-channel habitats (side channels and alcoves)
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 49
formed by Cedar Island and the rock islands off Mary S. Young State Park and north of
Cedaroak Boat Ramp. Steep forested canyons cross through the state park, their streams
emerging in these sheltered Willamette River side channels and backwater areas. Mary S.
Young Creek flows into a backwater area adjacent to two islands where several salmon carcasses
were observed; this stream has potential for restored fish access (culverts under park trails have
drops of up to 4 feet). Habitat types include Conifer Forest (0.4 acres), Mixed
ConiferlHardwood Forest (123.5 acres), Hardwood Forest (9.5 acres), Bottomland Forest (28.7
acres), Shrub (0.4 acres), Mixed shrublherbaceous (21 acres), Meadow/grassland (2.7 acres),
Palustrine Forested (5.5 acres) and Emergent (4.8 acres) wetlands, Open Water (river, 106 acres).
Tanner Creek
Tanner Creek is the largest subwatershed within the study area; it is experiencing heavy
development pressure. The significant habitat features within the site are generally limited to the
wetlands, riparian corridors, and adjacent uplands along Tanner Creek and its tributary streams,
which include Salamo Creek. The narrow, mostly wooded stream corridor contains multiple
streamside wetlands and several ponds; the stream and associated habitats descend across the
rolling hills of the upper basin until they reach the area of Imperial Dr. where the stream flows
into pipes and over rock ledges before discharging to the Willamette River. Roads and housing
development fragment the habitat corridor, limiting migratory and refuge opportunities for
wildlife. Though narrow and fragmented, these habitats contain a wide variety of resident and
migratory birds, mammals, amphibians, and reptiles. Fish have also been recorded in Tanner
Creek. Habitat types at this site include Oak Woodland (8 acres), Conifer Forest (10 acres),
M�ed Conifer/ Hardwood Forest (17 acres), Hardwood Forest (31 acres), Shrub (8 acres),
Mixed Shrub/Herbaceous (2 acres), Meadow/Grassland (12 acres), with Palustrine Forested (4
acres}, Scrub-Shrub (1 acre), and Emergent (2 acres) wetlands. Enhancement options include
restoration of vegetated buffers and retrofitting or replacement of culverts with arch culverts or
bridges to improve fish and wildlife passage.
Tualatin River
Tualatin River site extends 2.5 miles from Fritchie Creek to confluence with Willamette River.
The broad river valley narrows at Borland Bridge to a steeper gradient channel through forested
river canyon with steep wa11s to the south and a series of stepped floodplain and hillslope
terraces to the north, bordered by residential neighborhoods. This site includes the 14-acre
Tualatin River Open Space, the new 20-acre City Riverfront park, 9-acre Swift Shores Open
Space, and a small portion of Willamette Park. The Tualatin and lower Fritchie Creek riparian
corridors provide diverse forage and nesting habitat for a wide variety of wildlife including
several federal and state-listed species. The river has a functioning, well-connected floodplain
with remnant oxbows, and is directly linked to larger forest habitats to the west. Habitat types
include Conifer Forest, Mixed Conifer/Hardwood Forest, Hardwood Forest, Bottomland Forest,
Shrub, Mixed Shrub/Herbaceous, and Meadow/Grassland. Wetland habitats include: Palustrine
Forested, Palustrine Emergent, and Open Water. Across from the new City park is a wet-season
waterfall, a rare feature in the region.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 50
Upper Bernert Creek
This is a relatively small site in the upper Bernert Creek basin distinguished by having a small
remnant oak savanna/grassland habitat. A mixed Douglas firlbigleaf maple forest is located
northeast of the oak community. The upper Bernert Creek corridor continues south of Salamo
Road through maple and oak dominated forest before reaching I-205. Residential neighborhoods
border and bisect the site, and I-205 is located to the south. Habitat types include Mixed
Conifer/Hardwood Forest (12 acres}, Hardwood Forest (8 acres), Oak Savanna {4.5 acres), and
Mixed Shrub/Herbaceous (13.5 acres). The site provides forage, cover, and nesting habitat for a
variety of wildlife including species associated with oak communities such as band tailed pigeon
(a federal Species of Concern).
Upper Fern Creek / Skyline Ridge
Forested north-south ridge and associated stream corridors located in the Skyline Ridge,
Marylhurst and Hidden Springs neighborhoods above Highway 43. Hillside streams (some fish-
bearing) emerge from seeps and springs and flow through steep ravines dominated by Douglas
f�r, bigleaf maple, and occasionally Oregon white oak. This forest links the multiple ravines
along the steep ridge above residential areas along Hwy. 43. This sites includes a locally rare
Oregon ash-slough sedge-common camas wetland at the new City park at Upper Midhill Drive.
A variety of open space lands are part of the site, including the Arran (1 acre), Carriage Way (6
acres), Interstate Tractor (11 acres), Skye Parkway (8 acres), Troon (6 acres), and Wildwood (13
acres) Open Spaces. This site contains moderate to high quality upland, riparian and wetland
habitats. Habitat types include Conifer Forest (45 acres), Mixed Conifer/Hardwood Forest (82
acres), Hardwood Forest (18 acres), Oak Woodland (7 acres), Mixed ShrublHerbaceous (7
acres), Meadow/Grassland (1 acre), with Palustrine Forested (1 acre) and Emergent (1 acre)
wetlands.
Upper Willamette / Wetland Complex
The Upper Willamette / Wetland Complex Site is located along a wide and relatively
undifferentiated reach of the Willamette River between the Tualatin River confluence and
Willamette Falls. The confluence area, with its linkage to Site TU-H-1 and lazger habitats to the
west, provides important habitat functions; however, the major habitat feature of the site is a
forest, scrub-shrub and emergent wetland complex linked to Bernert Creek forests and the
Willamette River. This habitat area, located along the floodplain terrace between Willamette
Pazk and the West Linn Paper lagoon, comprises the largest wetland complex in the City,
totaling approximately 27 acres. The high interspersion of wetland types, with forested ash
wetlands and diverse scrub-shrub and open water areas, is also unique to the City. State and
federally listed species (both plant and animal) occur within the site. Other habitat features
include snags and large woody debris, which occur in greater abundance than at many other
sites. Two paper company settling basins border high quality wetland habitat. These area offer
potential wetland restoration and enhancement opportunities. Habitat types include Bottomland
Forest (32 acres), Conifer Forest (9 acres), Mixed Conifer/Hardwood Forest (1 acre}, Hardwood
Forest (10 acres), Oak Woodland (23 acres), Shrub (23 acres), Mixed Shrub/Herbaceous (2
acres), and Meadow/Grassland (2 acres). Wetlands include Palustrine Forested (10 acres),
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 51
Scrub-Shrub (2 acres), Emergent (11 acres), Wetland-Upland Mosaic (19 acres) and Open Water
(river, 118 acres).
Willamette Falls/Clackamas Confluence
This site marks the confluence of two major riverine systems, the Willamette and Clackamas
Rivers, integrated with other significant habitat features such as Goat Island, Willamette Falls,
and a network of forested stream corridors to the west. The site extends from Lower Barlow
Creek south to the falls along a mostly tree-lined reach of the Willamette River, and west along
the forested lowlands and stream corridors to Hwy. 43. This river reach provides a diverse mix
of instream habitats including both shallow and deepwater habitats, side channels and seasonal
alcoves, sand and gravel point bars, and rock ledges. The 17-acer Goat Island forms the core of
the confluence area across from the mouth of the Clackamas River. Goat Is1and is home to a
colony of Great Blue Herons (among other wildlife) with 54 active nests (estimated during
Spring 2002 surveys), making it one of the largest rookeries on the Willamette River. Upstream
from the island is the McLean House/Westbridge Park and the Abernathy Bridge, which is a
Peregrine Falcon nest site (eyrie). The site includes the 13-acre Burnside Park and 9-acre
Maddax Woods Open Space. Habitat types include Bottomland Forest (35 acres), Conifer Forest
(3 acres), Mixed Conifer/Hardwood Forest (77 acres), Hardwood Forest (8 acres), Oak
Woodland (5 acres), Mixed Shrub/Herbaceous (19 acres), with Palustrine Emergent wetlands (6
acres) and Open Water (river, 96 acres).
Assessment Summary
Table 12 summarizes the results of the WHA assessment, providing the WHA score, enhanced
score (potential score if identified enhancement actions are implemented), and special features
for each habitat site.
Table 12. Habitat Assessment Summary
�,.. ��, � � �� �� y . ��6�# � �� ��N� ��ir�ba��ei� �i�ci�l�e���s � `� � �� , �
�ai���t =�t�e ,. ,,,. � '' . . �. : �` � .. �i�Q ,�.�'�re.� �� ..� � . �� � � .r. ::, �� , i �d.:
...
Camassia/ CA-H-1 135 100 100 Vernal pools, quaking aspen bog;
Wilderness Park Baccharis, white rock larkspur, wivte-topped
aster;
Bald eagle, bandtailed pigeon, little willow
flycatcher, olive-sided flycatcher, pileated
wood ecker, le martin
Fritchie Creek FR-H-1 68 86 90 Cedar / skunk cabbage comtnunity;
Lar est Pacific madrones
Lower Fern Creek FE-H-1 49 80 87 Pileated woodpecker;
Cedar / skunk cabbage community, fish-
bearin stream
Lower Trillium Creek TR-H-1 70 75 85 Cutthroat trout;
Diverse wetland habitats
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 52
����.v �r Hakrtat ' �. '' �A ,. Ei�ha�ced . ��pe��i Features � `"
Hali�fa� �ite �.: Code "�� Acr.� Sciir� =Score� � �``� ���. u ��..
Mary S. Young / MA-H-1 323 90 96 Pileated woodpecker, little willow flycatcher;
Willamette Lowlands Winter steelhead, Coho salmon, Chinook
salmon;
Large habitat mosaic
Mary S. Young/ Upper MA-H-2 150 70 78 Bandtailed pigeon, live-sided flycatcher
Trillium Ridge Potential amphibian breeding sites
Ash forested wetlands
Tanner Creek TA-H-1 110 58 67 Pileated wood ecker; fish
Tualatin River TU-H-1 137 87 92 Bald eagle, band-tailed pigeon, little willow
flycatcher, pileated woodpecker
Red legged frog
Winter steelhead, coho salmon
Upper Bernert Creek BE-H-1 39 50 58 Remnant oak savanna;
band-tailed i eon
Upper Fern CreeW FE-H-2 165 72 79 olive-sided flycatcher, pileated woodpecker,
Skyline Ridge ash-sedge-camas wetland
fish-bearin stream
Upper Willamette / WI-H-2 265 82 89 White rock larkspur;
Wetiand Complex Ba2d eagle, bandtailed pigeon, pileated
woodpecker;
Steelhead, coho salmon, chinook salmon;
River confluence/Willamette Falls
Wetland complex
Willamette WI-H-1 247 86 93 Ba1d eagle, olive-sided flycatcher, peregrine
Falls/Clackamas falcon, pileated woodpecker;
Confluence Steelhead, coho salmon, chinook salmon;
Major confluence/habitat mosaic
Heron Rookery
Siqnificant Habitat Determination
Wildlife habitats were determined to be significant based on the WHA score for each site, the
presence of federal or state-listed species, the presence of locally rare species or habitats, and
other criteria described above. All 12 habitat sites met the WHA threshold criteria, and several
sites also were found to support federal or state-listed species or locally rare species or habitats.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 53
Staff Qualifications
Tim Brooks: Principal Environmental Planner
Project Role: Project Manager
Project Responsibilities: Wetland, riparian and wildlife inventories and assessments, mapping,
agency coordination, public involvement
Tim has more than 14 years of experience managing Goa15 natural resource inventory and planning
projects for local communities in Oregon. Several of Tim's projects have earned national and local
awards for policy innovation and environmental stewardship. Tim's recent Goa15 studies include work
for Hood River County, Corvallis, Beaverton and Ashland, as well as West Linn. In addition to project
management, Tim's responsibilities have included extensive field investigations, functional value
assessments, significance determinations, and impact analyses for multiple natural resources, including
wetlands. Tim has conducted wetland delineations, functional value assessments, and wildlife habitat
assessments for both public and private clients throughout Oregon and Washington. His wetland
delineations have consistently received concurrence from both federal (Corps) and state (DSL) regulators.
Tim Brooks holds a Master's degree in landscape design with an emphasis on stream and wetland ecology
and wildlife biology. Tim worked for six years under the guidance of Andy Castelle and other
professional wetland scientists at Adolfson Associates. He completed the Interagency Wetland
Delineation Course in 1993, "Grasses, Rushes and Sedges" course in 1995, and has completed related
coursework in ecology and botany at Portland State University.
Loverna Wilson: Biologist
Project Role: Wetland Scientist
Project Responsibilities: Wetland documentation and assessment, wetland summaries, data
compilation
Loverna Wilson obtained her M.S. in botany from Oregon State University, specializing in plant ecology.
She has extensive experience perForming wetland and riparian assessments and boundary delineations,
including field studies, report preparation, agency consultation and permitting guidance; wetland
mitigation, including restoration, creation, and enhancement design, and post-construction monitoring;
and impact assessment and mitigation design for both wetland and upland sites. In addition to individual
project delineations, she has also been responsible for conducting and completing Local Wetland
Inventories (LWIs) for the cities of Rockaway Beach, Gearhart, Tillamook, and Bay City on the northern
Oregon coast. LWI projects included field determinations, descriptions, and mapping of all wetlands
within the Urban Growth Boundary of each city, functional assessments of each wetland and, in
Tillamook and Rockaway Beach, functionai assessments of riparian corridors.
Loverna frequently teaches classes and workshops on wetland and upland plant identification. She also
conducts field trips and gives oral presentations about wetland characteristics, functional values and
restoration strategies, including presentations for DSL and other agencies.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 54
Esther Lev:
Project Role:
Project Responsibilities:
Ecologist
Wildlife and Wetlands Scientist
Wildlife habitat and wetland assessments
Esther Lev is a wildlife and restoration ecologist with over 25 years experience in wildlife, ecology,
wetlands assessment, natural resource planning, public outreach and education. Her experience includes
the preparation of designs for site and watershed assessments, restoration design, planting plans, project
permitting, project construction and implementation, collaborative community and volunteer education
and supervision. Esther is currently Executive Director of The Wetlands Conservancy (TWC). TWC's
on-going Oregon's Greatest Wetlands Project is an effort in Oregon to coordinate statewide conservation
efforts for biologically important wetlands. The proposed products of a map and associated biological
information will be available to any users through an easily-accessible web site. The project will also
facilitate partnerships to strengthen watershed and wetland conservation efforts throughout the state.
Angela Kearney: Staff Scientist
Project Role: Wetlands Scientist
Project Responsibilities: Wetlands documentation and assessment, data compilation
Angela Kearney's experience focuses on wetland planning and analysis for local communities in the
Portland metropolitan region. Her responsibilities include wetland determination and documentation af
streams, plant communities, soils and riparian corridors. As Stewardship Assistant for The Wetlands
Conservancy, Angela managed independent projects to restore and enhance urban wetland habitats. She
compiled and assessed data on area climate, topography, soils, vegetation, property easements and
government policy regarding land use and development. She also conducted site analyses and created
wetland property management plans and references for management, maintenance and restoration
projects. Angela incorporated statewide data and GIS maps into an interactive website
(http://www.wetland.p�.edu) and designed a community awareness program incorporating a multi-media
flash presentation, informational brochure, website development and information fairs.
Michele Dailey:
Project Role:
Project Responsibilities:
GIS 5pecialist
Cartographer / GIS Analyst
Mapping, digitizing, data compilation
Michele Dailey is a staff GIS Analyst with Ecotrust and has a variety of experience in compiling GIS data
from disparate sources, conducting spatial analysis, customizing Arc/View applications using Avenue
Programming, training students, laymen and professionals in GIS technology, and working with
volunteers. For example, Michele is currently principal analyst on a project with the Portland Water
Bureau. She has developed a GIS database of the Sandy and Bull Run watersheds and worked with
Bureau staff and scientists to update existing spatial data with first hand knowledge of the area, trained
staffand scientists in ArcView and Spatial Analyst by creating a custom training manual with cunent
basin data, and performed analyses of watershed and streams with existing elevation and hydrographic
data. Currently she performs ad hoc technical assistance and helps with specific project needs. She has
also developed a custom ArcView interface, using Avenue programming, for use by the public and
agency staff, for a project with the Oregon Deparhnent of Land Conservation and Development to create
a coastal access information system for the entire Oregon coast. Michele is the curator of the Inforain
web site, which serves as a spatial data and static and interactive map server.
West Linn Wetland, Riparian and Wildlife Habitat Inventory
Winterbrook Planning
February 2003 Page 55
0
WEST
�Oo �a � ����a �I D � �I���N�Oo ��
a�1��1�� � t� �.��
1 inch = 600 fcet
0 025 0.5 0.75 7
Miles
Inb�maoion shawn on tt�is map is �r planning �1tis map aM atl�er infwmation have been mmpileA
puryoses ony antl wetland infamation is wbject � West Linn Gaal 5 Planni�g. They ae not inOended
to change. The�e maY 6e �mnappetl wetlantls to be canplete a�M acwrate for any otlier purposes.
suhject Oo regulation and all wetlantl bounda�Y SPeu�plN. ihis iiAorma6on is rat intended b 6e
rtrappirg is approximate. In ad cases. xWal fieM �mplete fa p�uposes oT land use restriman, zoning,
mnditions detmnine wetlarM haundaNes. Yau a2 liUe, size.arM suiYabililY dC�e p�opalyfar specific usas.
ativisztl to cantac Yt tlie Oregon Divisron d State
ands aM ihe U.S. Army Caps of Ergi �s with
anY fegulatary Questio�s.
Legend
� Wetlands, Winterbrook Planning 2002
� Field Verified Wetlands, Winterbrook Planning 2002
. Possible Wetlands, Winterbrook Planning 2002
• Wetland Sample Plots, Winterbrook Planning 2002
Potential Jurisdicrional Drainages, West Linn GIS 2002
Potential Jurisdictional Waters, West Linn GIS 2002
Ta�ot COGO, West Linn GIS 2002
� Basin Boundaries, Winterbrook Planning 2002
�:�Y ;`�%
. �.
GIS
�,.���„,
t�S�IF(E
llfYElit
O Study Area Boundary, Winterbrook Planning 2003
Wetland unique ID code referenced in black (eg. FR-Ol)
Wetland sampie plots referenced in dark geen (eg. BEl • 1, BEl-2)
Possible Wetlaads referenced in dark blue (eg_ PVI�
DSL delineation numbers referenced in dadc bmwn (eg. det98-0092)
Basins referenced in maroon (eg. Bernet)
PLS system referenced in orange (eg. 3s1e01a)
w � � a.�.a
Append� A
Wetland Characterization
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Bernert 1
#s: DP-1, DP-2
Cowardin Class: PEM, PFO
Willamette River
: Willamette Falls Dr. at 7`� St.
Sub-basin: Bernert Creek
Lega1 description: Lots 1900, 2000; T2S, R1E, Section 35 (Atlas #5432)
Description (incl. topo. position, land use, basis): Wetland BE-O 1 is near the upper end of Bemert Creek
between I-205 and Willamette Falls Drive. There is a small group of business offices adjacent to the
wetland on the west, and residential housing to the south. The I-205 corridor is at the top of a steep bank
to the north, and residential and forested open space dominates the areas to the east. BE-01 is the
upstream one of two small wetlands at this locarion. Both BE-01 and BE-02 are on t�e stream and are
connected by a culvert. The stream is small, and bisects a bottomland wetland of reed canarygrass and
Oregon ash trees. 'There is sufficient subsurface discharge near the foot of the I-205 embanl�nent to
extend the boundary of BE-01 upslope in some areas. Data. samples were taken in this sloping area.
Wetland hydrology is primaa-ily provided by stream flow, with additional water coming from the seeps
upslope. The stream flows east through BE-02, under Willamette Falls Drive, and eventually into the
Willamette River. The wetland boundary is at a sharp topographic break along the south side of the
stream. On the north side where seeps extend the wetland upslope, the boundary lies where dense sedge
and slender rush decrease to a trace, and ta.11 fescue becomes dominant. The surrounding landscape is
quite disturbed and dominated by introduced, somewhat weedy species. Uplands are dominated by
Himalayan blackherry and ta.11 fescue.
Soils: Cove Silty Clay Loam
Source: stream flow, seeps
Vegetation:
Trees Shrubs Vines
Oregon ash
Herbs
reed canarygrass
Kentucky bluegrass
etland Functions: intact water quality; high enhancement potential; not appropriate for education; other
fimctions moderate
Significant? � Yes ❑ No Remarks: intact water quality
Code: BE-01 Field dates: 4/22/02
Size: 0.34 acres Method: � on-site ❑ off-site
HGM Class: RFT Investigators: TB, LW
1 Restoration Opportunities: Restore native emergent and woody plants, enhance buffer along
lot and road with dense native shrub plantings.
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Bernert 2 Code: BE-02 Field dates: 4/22/02 -
Plot #s: (see det98-0002) Size: 0.32 acres Method: ❑ on-site � off-site
Cowardin Class: PEM, PFO
Willamette River
Sub-basin: Bernert Creek
'address: Willamette Falls Dr. at 7�' St. (east of BE-01)
description: Lots 3400, 3500; T2S, R1E, Section 35 (Atlas #5432)
Description (incl. topo. position, land use, basis): Wetland BE-02 is near the upper end of Bernert Creek
between I-205 and Willamette Falls Drive. The I-205 corridor is at the top of a steep ba.nk to the north,
and residential and forested open space dominates the areas to the southeast. BE-02 is the downstream
one of two small wetlands at this location. Both BE-O 1 and BE-02 are on the stream and are conriected
by. a culvert The wetland is dominated by reed canarygrass and soft rush to the west, and Oregon ash to
the east. Wetland hydrology is prixnarily provided by the stream. The stream flows east through BE-02,
under Willamette Falls Drive, and eventually into the Willamette River. The wetland boundary is at a
sharp topographic break along the north and south sides of the wetland. Uplands are doxninated by
Himalayan blackberry.
Soils: Cove Silty Clay Loam
Source: stream flow, seeps
Vegetation:
Trees Shrubs. Vines Herbs
Oregon ash Oregon ash reed canarygrass
soft rush
etland Functions: intact water quality; high enhancement potential; not appropriate for education; other
functions moderate
Significant? � Yes ❑ No Remarks: intact water quality
HGM Class: RFT Investigators: TB, LW
1 Restoration Opportunities: Restore native emergent and woody plants, enhance buffer along
lot and road with dense native shrub plantings.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Camassia (big pond) Code: CA-01 Field da.tes: 4/4/02
�t #s: DP1, DP2 Size: 0.71 acres Method: � on-site ❑ off-site
Class: PSS, POW
Willamette River
Sub-basin: Camassia
Location/address: Camassia Natural Area off Walnut St. (north of Sunset Ave.)
description: Lots 1000, 3400, 3500; T2S, R2E, Section 30 (Atlas #5235, 5335); Lot 1000; T2S,
Section 31 (Atlas #5235, 5335)
Description (incl. topo. position, land use, basis): Carnassia Natural Area is a protected open space on the
cliffs above and north of I-205 and Willamette Falls. It is bounded by I-205 on the southeast, residential
housing on the southwest and West Linn High School property on the north and east. Wetland �A-01 is
near the center of Camassia Natural Area. This wetland contains the largest pond on the site, and has
water year round. Wetland hydrology is primarily provided by groundwater. There is some outflow
which eventually empties into the Willamette River. The wetland is bordered by gentle to sleep rocky
slopes on all sides except the south where the terrain is generally flat. The wetland boundary occurs at
the poirit where Oregon ash, spiraea and/or willow are replaced by Douglas fir, Oregon white oak ,
snowberry and/or sword fern as dominants. Uplands at the sample point are dominated by Oregon white
oak, Douglas fir, vine maple, trailing blackberry, snowberry, and sword fem.
Soils: Witzel Very Stony Silt Loam, 3-40% slopes
Source: groundwater
Vegeta.tion:
Trees Shrubs
Oregon ash
clustered rose
Vines Herbs
creeping buttercup
Wetland Functions: diverse habitat; has educational and recreational uses; other functions moderate
Significant? � Yes ❑ No Remarks: diverse habitat
HGM Class: DOF Investigators: TB, LW,.AK
Potential Restoration Opportunities: Sensitive site with diverse habitat; removal of exotic species along
perimeter by TNC is ongoing.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Camassia 2
#s: *see note beiow
Class: PSS
asin: Willamette River
Sub-basin: Cama.ssia
Camassia Natural Area off Walnut St. (north of Sunset Ave.)
Legal description: Lot 1000; T2S, R2E, Section 30; Lot i000; T2S, RZE, Section 31 (Atlas #5235, 5335)
Description (incl. topo. position, land use, basis): Camassia Natural Area is a protected open space on the
cliffs above and north of I-205 and Willamette Falls. It is bounded by I-205 on the southeast, residential
housing on the southwest and West Linn High School property on the north and east. Wetland CA-02 is
the wetland �nearest I-205 towazd the east edge of Camassia Natural Area. This wetland is a large
permanent pond that is filled with stands of willow and Douglas sptra,ea. Wetland hydrology is primarily
provided by groundwater. The wetland depression has gentle to moderately steep slopes on all sides.
The wetland boundary occurs at the point where spiraea and willow are replaced by Douglas fu�, Oregon
white oak , snowberry and/or sword fern as dominants. Uplands near the observation point are
dominated by Oregon white oak, Douglas f�r, tall Oregon-grape, salal, and licorice fern.
*No samplin.g was conducted due to site sensitivity and protected stature. Observation occurred at the
wetland edge.
Soils: Witzel Very Stony Silt Loam, 3-40% slopes
Source: groundwater
Vegetation:
Trees Shrubs
red alder Sitka willow
Douglas spiraea
Vines Herbs
creeping buttercup
etland Functions: inta.ct hydrologic control; has educational uses
Significant? � Yes ❑ No Remarks: inta.ct hydrologic control; has educational and recreational
uses; water quality function not present; other functions rnoderate; within 1/4 mile o£ WQ limited stream
Code: CA-02 Field dates: 4/4/02
Size: Q.89 acres Method: � on-site ❑ off-site
HGM Class: DCP Investigators: LW, AK
Restoration Opportunities: Sensitive site; removal of nearby exotic species by TNC is ongoing.
West Linn Goa.15 Inventary
Wetland Characterization Sheet
etland: Camassia meadows Code: CA-03P Field dates: 4/4/02
ot #s: *see note below Size: 035 acres Method: � on-site ❑ off-site
Class: PEM
Basin: Willamette River
Sub-basin: Camassia
Camassia Natural Area off Walnut St. (north of Sunset Ave.)
description: Lot 1000; TZS, RZE, Section 30 (Atlas #5235)
Description (incl. topo. position, land use, basis): Camassia Natural Area is a protected open space on the
cliffs above and north of I-205 and Willamette Falls. It is bounded by I-205 on the southeast, residential
housing on the southwest and West Linn High School property on the north and east. Potential Wetland
CA-03P encompasses three open meadows situated on basalt plateaus: sites with shallow or no soil on
rocky ground, and dominated by camas lilies and grasses. CA-03P are small depressions on a large, flat
rock, with saiuration for only a few weeks in the early spring. The two dominant plants are camas and a
dense mat of mosses. Wetland hydrolagy is primarily provided by precipitation. The wetland boundary
occurs at the point where camas is replaced by Oregon white oak, madrone, poison-oak, and/or upland
grasses. Adjacent uplands are dominated by Oregon white oak, licorice fern, and a variety of upland
grasses. The vegetation composition and rocky substrate may make this type of wetland non-
jurisdictional, but it is a key wetland community in open meadows of the Camassia Natural Area.
*No sampling was conducted due to site sensitivity and protected sta.ture. Observation occurred at the
wetland edge.
Soils: Witzel Very Stony Silt Loam, 3-40% slopes
Hydrologic Source: precipitation
Vegetation:
Tzees Shrubs Vines Herbs
common camas
mosses
Wetland Functions: has educational and recreational uses and is aesthetically pleasing; little
enhancement potential; other functions moderate
Significant? � Yes ❑ No Remarks: rare plants (Delphinium leucophaeum)
Potential Restoration Opportunities: Sensitive site; removal of nearby exotic species by TNC is ongoing.
Velvet �rass is invading some meadow area.
AGM Class: DCNP Investigators: TB, LW, AK
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Camassia Aspen Wetland
#s: *see note below
Code: CA-04
Size: 0.04** acres
Field dates: 4/4/02
Methad: � on-site ❑ off-site
Class: PSS
Willamette River
HGM Class: Flats
Investigators: TB, LW, AK
Sub-basin: Camassia
Location/address: Camassia Natural Area off Walnut St. (north of Sunset Ave.)
Legal description: Lot 1000; T2S, R2E, Section 30 (Atlas #5235)
Description (incl. topo. position, land use, basis): Camassia Natural Area is a protected open space on the
cliffs above and north of I-205 and Willamette Falls. It is bounded by I-205 on the southeast, residential
housing on the southwest and West Li.nn High School property on the north and east. Wetland CA-04 is
a small wetland pond dominated by qualdng aspen and Douglas spiraea located northwest of CA-01. The
presence of quaking aspen makes this wetland locally rare. Wetland hydrology is primarily provided by
groundwater. The wetland is located in a small depression on a gentle east-facing slope. The wetland
boundary occurs at the point where quaking aspen and spiraea are replaced by Douglas fir, Oregon white
oak , snowberry, salal and/or sword fern as dominants. Uplands near the observation point are dominated
by Oregon white oak, Douglas fir, salal, trailing blackberry, and licorice fern.
*No sampling was conducted due to site sensitivity and protected stature,
**This wetland is below size threshold but was included because of its local significance and protected
stature.
Soils: Witzel Very Stony Silt Loam, 3-40°/a slopes
Source: groundwater
Vegetation:
Trees Shrubs Vines Herbs
qua.king aspen Douglas spiraea licorice fern
mosses
etland Functions: intact hydrologic control; has educational and recreational uses and is aesthetically
Significant? � Yes ❑ No Remarks: intact hydrologic control
Restoration Opportunities: N/A
West Linn Goa15 �Inventory
Wetland Characterization Sheet
Wetland: Camassia 5
Code: CA-OS
Field dates: 4/4/02
Plot #s: *see note below
Cowardin Class: PSS
: Willamette River
Size: 1.14 acres
HGM Class: DCNP
Sub-basin: Carnassia
Method: � on-site ❑ off-site
Investigators: TB, AK
Camassia Natural Area off Walnut St. (north of Sunset Ave.)
description: Lot 1000; T2S, R2E, Section 30 (Atlas # 5235)
Description (incl. topo, position, land use, basis): Camassia Natural Area is a protected open space on the
cliffs above and north of I-205 and Willamette Falls. It is bounded by I-205 on the southeast, residential
housing on the southwest and West Linn High School property on the north and east. Wetland CA-OS is
a small scrub-shrub wetland dominated by Sitka willow and located 50 feet southwest of CA-04.
Wetland hydrology is primarily provided by groundwater. The wetland is located in a small depression
on a gentle east-facing slope. The wetland boundary occurs at the point where willow is replaced by
Douglas fir, snowberry, salal and/or sword fem as dominants. Uplands near the observation point are
dominated by Douglas fir, salal and sword fern.
*No sampling was conducted due to site sensitivity and protected stature.
Soils: Witzel Very Stony Silt Loarn, 3-40% slopes
Hydrologic Source: groundwater
Vegetation:
Trees Shrubs
Sitka willow
Wetland Functions: intact hydrologic control; has recreational uses and is aesthetically pleasing; water
quality function not present; other functions moderate �
Significant? � Yes ❑ No Remarks: intact hydrologic control
Potential Restorarion Opportunities: N/A
Vines Herbs
.,. . , m_. ,,,----------�-- r,._.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: West Linn High School
Code: CA-06
Field dates: 4/11/02
#s: DP-1, DP-2
Gowardin Class: PEM
: Willamette River
Size: 0.42 acres
HGM Class: RFT
Sub-basin: Camassia
Method: � on-site ❑ off-site
Investigators: TB, AK
Location/address: West Linn High School, near West A and Buse St.
Legal description: Lot 4500; T2S, R2E, Section 30 (Atlas # 5235)
Description (incl, topo. position, land use, basis): Westland CA-06 is located on West Linn High School
property along its border with Camassia Natural Area. It is bounded by I-205 on the south, West A Street
on the east, Camassia on the west, and the West Linn High School parking lot on the north. Wetland CA-
06 is an emergent wetland dominated by reed canarygrass, with other common species including creeping
buttercup, velvet grass, and colonial bentgrass. Occasianal woody species include Oregon ash and Sitka
willow. Wetland hydrology is primarily provided by surface water (a sma1l, springfed stream). The
wetland is on a relatively flat terrace between two elevated basalt outcrops (east and west). The wetland
boundary occurs at the point where reed canarygrass is replaced by Oregon white oak and poison oak as
dorninants. Uplands near the observation point are dominated by Oregon white oak, Pacific madrone,
poison oak and licorice fern. See also det99-0250.
Soils: Witzel Very Stony Si1t Loam, 3-40% slopes
gic Source: surface water
Vegetation:
Trees Shrubs Vines Herbs
reed canarygrass
etland Functions: high enhancement potential, aesthetically pleasing; not appropriate for recreation;
ser functions received moderate ratings
Significant? � Yes ❑ No Remarks: within 1 /a mile of a WQ limited river
Restoration Opportunities: Manage invasive exotic species; revegetate with native plan#s.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Cascade Springs Code: CS-Ol Field dates: 4/22/02
�t #s: DP-1 to DP-4 Size: 1.09 acres Method: � on-site ❑ off-site
Cowardin Class: PEM
Basin: Willamette River
Sub-basin: Cascade Spring Pond Creek
Location/address: north of Holly St. south of Cascade St.
Legal description: Lots 200, 300, 400, 500, 900, 2100, 2103, 2105, 2106, 3800, 3900, 5003, 5004, 5005,
5400, 5600; T2S, R2E; Section 30 (Atlas #5235, 5236)
Description (incl. topo. position, land use, basis): Wetland CS-01 is associated with Cascade Spring Pond
Creek, and is on a na�row floodplain at the bottom of a steep-sided canyon, surrounded by residential
uses, with commercial at the west end of the site. The stream has a meandering and braided channel
extending from side-slope to side-slope. The wetland is dominated by reed canarygrass near the sample
site, but upstream there are also patches of skvnk cabbage and other native emergents. Wetland
hydrology is provided primarity by stream flow plus smaller amounts of sheet flow from the surrounding
side-slopes. The wetland boundary is at a sharp topographic brealc at the foot of the canyon
embanlanents. The forested canyon walls are relatively undisturbed, except for a few cleared residential
back yaxds. Uplands are dominated by big-leaf maple and Himalayan blackberry (which, in addition to
steep slopes, does provide a buffer).
Soils: Xerochrepts and Haploxerolls, very steep
Source: stream flow, sheetflow
Dominant Vegetation:
Trees Shrubs
red alder
Vines Herbs
climbing nightshade reed canarygrass
stinging nettle
etland Functions: high enhancement potential; not appropriate for education; other functions moderate
Significant? � Yes ❑ No Remarks: within 1!4 mile of WQ limited stream
Potential Restoration Opportunities: Manage invasive species, particularly reed canarygrass and
Himalayan blackberry. Plant a variety of native emergents and shrubs (along perimeter) to diversify
habitat.
HGM Class: RFT Investigators: TB, LW, AK
ru.... n.... ran..r.._a nz.._ .................._ oL,._.
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Carriage Way Open Space Code: FE-Ol
#s: N/A
Fie1d da.tes: 4/18/02
t,�.�_., ;_r:
r ��:` �,,_'��
Size: 1.52 acres Method: ❑ on-site � off-site
Cowardin Class: PEM HGM Class: SH Investigators: TB, LW
Basin: Willamette River Sub-basin: Fern Creek
Location/address: Carriage Way at Suncrest Drive
Legal description: Lot 4900; T2S, R1E, Section 23 (Atlas # 5031)
Description (incl. topo. position, land use, basis): Wetland FE-O 1 is located at the headwaters of Fern
Creek in the Carriage Way Open Space, which was set aside as part of the adjacent residential
development. Groundwater seeps provide the primary source of wetland hydrology, and a small
springfed stream meanders east through the wetland. The wetland is dominated by a variety of emergent
species, including soft rush, slough sedge, bulrush, and several grasses. The obligate wetland species
occur in topographic depressions in the gently northeast sloping wetland. A few Douglas spiraea, red-
osier dogwoad and Oregon ash occur along the wetland perimeter. The wetland was delineated during
the development process (Proj 7935141); a small (approx. 300 sq. ft.) area at the southwest corner
appears to be filled and the LWI mapping was adjusted accordingly.
Soils: Cascade Silt Loam, 8-15% slopes
gic Source: groundwater (seeps)
Vegetation:
Trees Shrubs
�ines Herbs
soft rush
slough sedge
small fruited bulrush
meadow foxtail
velvet grass
etland Functions: Water quality and hydrologic control functions are not present; educational and
�reational functions are not appropriate; other functions are moderate.
Significant? ❑ Yes � No Remarks: criteria not met
Restoration Opportunities: Plant native woody plants along perimeter to enhance buffer values.
.t, . .. cv...r__a �2� .............:�,..:.... oi.,...s
West Linn Goal 5 Inventory
Wetland Characterization Sheet
Wetland: Lower Fern Creek
Code: FE-02
Field dates: 4/18/02, 6/6/02, 9/16/02
#s: N/A
Cowardin Class: PEM, PSS
Willamette River
Size: 2.33 acres
HGM Class: RFT
Sub-basin: Fern Creek
Method: � on-site � off-site
Investigators: TB, .AK
West of Old River Dr., from Fairview Way to Arbor Dr., incl. fizture park site
Legal description: Lots 400, 1900, 3500, 3800; T25, R1E, Sections 13 (Atlas # 4832, 4833)
Lots 400, 1700, 1800, 1900; T2S, R1E, Section 14 (Atlas # 4832, 4833)
Description (incl. topo. position, land use, basis): Wetland FE-02 is located along a 30- to 80-foot wide,
generally flat ravine bottom between Fairview Way and Old River Road. Much of the wetland is within
the boundaries of a future City community park and is bordered by residential uses on the south and east.
The wetland has both scrub-shrub and emergent components, with salmonberry as dominant species in
the former and lady fern and skunk cabbage in the latter. The wetland is fed by Fern Creek, a perennial
stream. The wetland boundary is mazked by a topographic break (located at the toe of the ravine side
slope or the toe of elevated terraces on the ravine bottom) and the transition to upland species dominated
by Douglas fir, big-leaf maple and vine maple. Part of the wetland was previously delineated (Det 96-
0496); the LWI mapping was adjusted to show the wetland extending south onto private lots and north to
where the ravine narrows.
Soils: Woodburn Silt Loam, 8-15% slopes
Hydrologic Source: surface water
Dominant Vegetation:
Trees Shrubs Vines
salmonberry
Herbs
lady fern
skunk cabbage
Wetland Functions: diverse wildlife habitat, intact fish habitat, other functions moderate
Significant? � Yes � No Remarks: diverse wildlife habitat, intact fish habitat, other functions
moderate
Potential Restoration Opportunities: English ivy management is needed.
West Linn Wetland Characterization Sheet
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: North Fork Fritchie Creek Code: FR-01
#s: DP-1, DP-2
Class: PEM
Size: 1.42 acres
HGM Class: RFT
Field dates: 3/20/02
Method: � on-site ❑ off-site
Investigators: LW, TB, AK
asin: Tualatin River Sub-basin: Fritchie Creek
ocation/address: north of I-205, east of Woodbine Road
egal description: Lots 600, 700; T2S, R1E, Section 34 (Atlas #5230, 5330)
Description (uicl. topo. position, land use, basis): Wetland FR-01 is associated with the Fritchie Creek
floodplain at the bottom of a steep-sided canyon. The stream is incised but meandering. A beaver dam
spans the stream about 100 ft. upstream from the sample site. Wetland hydrology is provided by the
stream and by precipitation and sheetflow from the beaver dam and surrounding side-slopes. The stream
flows into a culvert under I-205 about 200 ft. downstream from sample site. The forested canyon walls
and stream channel are relatively undisturbe�l. The wetland boundary is at a sharp topographic break at
the foot of the canyon embanlanents. Uplands are dominated by big-leaf maple, Hima.layan blackberry,
and red elderberry.
Soils: Xerochrepts and Haploxerolls, very steep
Source: surface flow, sheetflow, precipita.tion
Vegetation:
Trees Shrubs Vines Herbs
Westem red cedarHimalayan blackberry. reed canarygrass
Wetland Functions: intact fish habitat; high enhancement potential; low education, recreation and
aesthetic values; other functions moderate
Significant? � Yes ❑ No Remarks: within 1/4 mile of WQ lirnited stream; connected to ODFW
fish bearing stream
Potential Restoration Opportunities: Manage invasive species; add native emergents and shrubs for
greater species diversity.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Fritchie Creek tributary Code: FR-02
#s: DP-1, DP-2
Class: PEM
Size: 0.16 acres
HGM Class: RFT
Tualatin River
Field dates: 3/21/02
Method: � on-site ❑ off-site
Investigators: LW, TB
Sub-basin: Fritchie Creek
Street address/location: north of Johnson Rd., 200 feet southwest of I-205
description: Lots 500, 502; T2S, R1E, Section 34 (Atlas #5330)
Description (incl. topo. posztion, land use, basis for boundary): Wetland is associated with Fritchie Creek
floodplain at bottom of steep-sided canyon. Stream is incised but meandering in a 40- to 75-ft-wide
bottomland. The stream becomes more incised downstream. There is a high berm with a water con�rol
gate (open) downstream from the sample site. Wetland hydrology is provided by surface flow and
groundwater (a seep was noted near the toe of the I-205 embankment). Upstream, the creek flows out of
a culvert under I-205 about 200 ft. east of sample site. Forested canyon slopes and stream channel are in
a relatively natural condition. The wetland boundary is at a sharp topographic break at the foot of the
canyon slopes. Upland banks are dominated by big-leaf maple, Himalayan blackberry, osoberry, sword
fern, and Pacific waterleaf. In addition, some of the bottomland areas have been dewatered, and are
dominated by Himalayan blackberry, waterleaf and English ivy.
Soils: Xerochrepts and Haploxerolls, very steep
Source: streamflow, groundwater
Vegetation:
Trees Shrubs Vines Herbs
Pacific willow Himalayan blackberry reed canarygrass
stinging nettle
Wetland Functions: intact hydrologic control; high enhancement potential, aesthetically pleasing; not
appropriate for education or recreation uses; other functions moderate
Significant? � Yes ❑ No Rexnarks: direct connection to ODFW salmonid stream; within %a mile
WQ limited stream
atial Restoration Opportunities: Manage invasive species (reed canarygrass, blackberry and ivy).
native shrubs to diversity habitat.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: South Fork Fritchie Creek Code: FR-03
#s: DP-1, DP-2
Cowardin Class: PFO
Basin: Tua.latin River
Size: 0.35 acres
HGM Class: RFT
Field da.tes: 3/21/02
Method: � on-site ❑ off-site
Investigators: LW, TB
Sub-basin: Fritchie Creek
Street address/location: west side of Johnson Rd., north of Meadowview Ct.
Legal description: Lots 1300, 1700, 1900, 2000, 2100; T2S, R1E, Section 34 (Atlas #5330)
Description (incl. topo. posirion, land use, basis for boundary): Wetland is associated with the s�ream
channel which flows between Johnson Road and a steep embanlanent. There is residential development
at the top of the bank, The wetland e�ctends across much of the narrow bottomland, ending at the
topographic break at the foot of the west embanl�nent and at the foot of the short slope below Johnson
Road. Wetland vegetation is dominated by westem red cedar and red alder, with skunk cabbage common
on the ground layer. Common upland trees next to the wetland include big-leaf maple and red alder.
Other dominants are Himalayan blackberry, waterleaf, creeping buttercup, piggy-back and sword fern.
Soils: Xerochrepts and Haploxerolls, very steep
Source: streamflow
Vegetation:
Trees
Western red cedar
red alder
big-leaf maple
Shrubs Vines
salmonberry Himalayan blackberry
Herbs
skunk cabbage
piggy-back plant
etland Functions: high enhancement potential; low education and recreation values; other functions
Significant? � Yes ❑ No Remarks: connected to salmonid stream; within 1 /4 mile of WQ limited
stream
Restoration Opportunities: Add dense native shrubs along Johnson Rd. to improve buffer.
West Linn Goai 5 Inventory
Wetland Characterization Sheet
Wetland: Lowe� North Fork Fritchie
#s: DP-1, DP-2
Class: PENI
Basin: Tualatin River
Code: FR-04
Size: 0.41 acres
HGM Class: RFT
Field dates: 4/3/02
Method: � on-site ❑ off-site
Investigators: TB, LW
Sub-basin: Fritchie Creek
Location/address: east side of Johnson Rd., across from Tualatin River
Legal description: Lots 800, 1000, 1100; T2S, R1E, Section 34 (Atlas #5330)
Description (incl. topo. position, Iand use, basis): Wetland FR-04 is at the lower end of tlze North Fork of
Fritchie Creek, just east of Johnson Raad. Most of the surrourtding axea is residential, although it is near
the edge of the UGB and more open rural residential areas. The Tualatin River 100-year floodplain
extends up Fritchie to this wetland, and the owners noted that the area flooded in 1996-1997. Fritchie
Creek flows along the north edge of the floodplain at the toe of a moderately sloped forested
embankment that extends up to I-205. The stream is incised deeply at the north end of the reach, but less
downcut toward the south end. Wetland hydrology is provided by stream overflow and a seasonal high
water table with groundwater discharges from hillslope seeps. The emergent wetland follows the path of
the stream and widens to the west where seepage is evident and to east where it meets the floodplain.
Sampling was conducted at the west end of the wetiand. The stream flows into a culvert under Johnson
Road and continues south to the Tualatin River. The forested north slope is relatively undisturbed. The
bottomland area is being managed by the home owner, and includes blackberry removal, mowing, and
gardening. The wetland boundary to the north is at an irregular topographic break on the slope face;
groundwater is discharged at the foot of these breaks. The wetland boundary on flatter ground is defined
by a slight topographic rise and a change in vegetation. Uplands are dominated by big-leaf maple, red
alder, Hima.layan blackberry, osoberry, and sword fern.
Soils: Cloquato Silt Loam
Source: surface flow; groundwater seeps
Vegetation:
Trees Shrubs
Vines Herbs
Himalayan blackberry skunk cabbage
giant horsetail
Wetland Functions: intact hydrologic control; high enhancement potential; low education, recreation and
aesthetic values; other functions moderate
Significant? � Yes ❑ No Remarks: connected to salxnonid stream; 1/4 mile from WQ limited
strearn
Potential Restoration Opportunities: Continue management of invasive species. Consider moving home
vut of floodnlain.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Hidden Springs
Plot #s: DP-1, DP-2
Cowardin Class: PSS
Basin: Willamette River
: south of Derby St. in Sunburst Park
Sub-basin: Hidden Springs Creek
Legal description: Lot 13500; T2S, R1E, Section 23 (Atlas #5031)
Description (incl. topo. position, land use, basis): Wetland HI-01 is in a shrub thicket at Sunburst Park.
The park is open space surrounded by residential housing. HI-01 is the headwaters of Hidden Springs
Creek, a piped tributary to Trillium Creek. Wetland hydrology is provided by subsurface discharge from
a series of seeps along the bottom of a broad, flat swale. The wetland outflow enters a pipe, which
eventually discharges to Trillium Creek. There is no topographic break but the wetland boundary is
defined by the point where Pacific ninebark and willow drop out, and upland species dominate. Uplands
at the site are dominated by Oregon white aak,. Himalayan blackberry, and osoberry.
Soils: Hardscrabble Silt Loarn, 7-20% slopes
Hydrologic Source: groundwater
Dominant Vegetation:
Trees Shrubs Vines Herbs
Pacific willow Pacific ninebark hairy willow-herb
Wetland Functions: has educational and recreational values; water qua.lity function is not present; other
functions moderate
Significant? ❑ Yes � No Remarks: criteria not met
Potential Restoration Opportunities: Revegetate eroded soils; ge�ide users on designated trails outside and
around wetland.
Code: HI-01 Field da.tes: 4/2/02
Size: 0.33 acres Method: � on-site ❑ off-site
HGM Class: DOF Investigators: TB, LW
West Linn Goal 5 Inventory
Wetland Characterization Sheet
Wetland: Robinwood Creek wetlands Code: RO-01 Field dates: 4/23/02
Plot #s: DP-1, DP-2 Size: 0.29 acres Method: � on-site ❑ off-site
Cowardin Class: PEM, PFO HGM Class: RFT Investigators: TB, LW
Basin: Willamette River
Sub-basin: Robinwood Creek
: Upper Midhill Dr. nortih of Robinwood Way
Legal description: Lots 3800, 3900, 5000; T2S, R1E, Section 14 (Atlas # 4832)
Description (incl. topo. position, land use, basis): Wetland RO-O l is situated on a northeast facing slope
along Robinwood Creek in a future City park at Upper Midhill Urive. The park site is mostly forested
and the wetland includes both forested and emergent components; Oregon ash and black cottonwood are
dominants in the forest azeas, and slough sedge and common camas in the emergent areas. Single family
housing borders the park on all sides. Wetiand hydrology is provided by streamflow and groundwater
discharges from hillside seeps. The wetland boundary is defined by a change from slough sedge and
camas to English ivy, sword fern, oceanspray and hazelnut as dominants. Upland areas are dominated by
Oregon white oak and Himalayan blackberry.
Soils: Cascade Silt Loam, 8-15% slopes
Source: surface flow, seeps
Vegetation:
Trees Shrubs Vines
Oregon ash
black cottonwood
Herbs
common camas
slough sedge
Wetland Functions: intact hydrologic control, high enhancement potential has educational uses; other
functions moderate
Significant? � Yes ❑ No Remarks: intact hydrologic control, high enhancement potential ha.s
educational uses; other functions moderate
. Restora.tion Opportunities: Major Himalayan blackberry infestation in adjacent forest has been
cleared; will require continued management.
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Tanner 1(regional facility) Code: TA-Ol Field da.tes: 4/2/02
Plot #s: DP-1, DP-2 Size: 0.37 acres Method: � on-site � off-site
Cowardin Class: PEM HGM Class: RFT Investigators: TB, LW
: Willamette River
Sub-basin: Tanner Creek
Salaxno Rd. at Bland Circle
description: Lots 1103, 1402, 3500, 3700; T2S, RlE, Section 35 (Atlas #5332)
Description (incl. topo. position, land use, basis): Wetland TA-01 is near the upper end of Salamo Creek,
a small tributary to Tanner Creek. TA-01 is an on-line pond that has been redesigned as a retention basin
for newly developing areas nearby. The pond is surrounded by gravel and sand fill material on all sides
except the inflow channel on the north end. There is very little wetland vegetation except for reed
canarygrass along the inflowing stream. There is some vegetation on the surrounding banks, mostly
upland pioneer species. Wetland hydrology is provided by the stream. The stream flows into the pond
from the north, and empties into a culvert under Bland Circle. The wetland boundary is near the wetted
edge of the graveUsand banks. Uplands are dominated by tall fescue and cultivated clovers.
Soils: Delena Silt Loam, 3-12% slopes
Source: surface flow
Vegetation:
Trees Shrubs Vines
red alder willow
Herbs
reed canarygrass
cattail
small loosestrife
Wetland Functions: intact hydrologic control; other functions moderate
Significant? � Yes ❑ No Remarks: intact hydrologic control
Potential Restoration Opportunities: If consistent with regional storxnwater facility management
obj ectives, plant native shrubs along wetland perimeter to add buffer and wildlife cover.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
Wetland: Tanner 2 Code: TA-02 Field dates: 4/2IO2
Plot #s: (no access) Size: 0.59 acres Method: 0 on-site � off-site
Cowardin Class: PSS, PFO HGM Class: RFT Investigators: TB, LW
Basin: Willamette River Sub-basin: Tanner Creek
Location/address: between Old Parlcer Rd, and Rosemont Rd.
Legal description: Lots 300, 1100; T2S, R1E, Section 26 (Atlas #5232)
Description (incl. topo. position, land use, basis): Wetland TA-02 is at the headwaters of Tanner Creek.
It runs parallel to Old Parker Road south of Rosemont Drive, across from an area of new development.
The stream flows down a moderately sloped draw with Old Parker Road above the west bank, and a
hillside pasture above the east bank. Wetland hydrology is provided primarily by subsurface discharge,
with some surface flow inputs from the west. There is sufficient flow to fill a pond near the upstream
end of the stream channel. The pond may be impounded by a beaver dam but this could not be
conf'umed. The stream flows into a culvert under Palmer Road, then across an open space tract (future
park). The wetland boundary is limited to a narrow strip of wetland plants along the edge of the stream
channel and pond. Uplands are dominated by Hima.layan blackberry with some Douglas fir and Oregon
white oak near the headwaters.
Delena Si1t Loam, 3-12% slopes
Source: groundwater
Dominant Vegetation:
Trees Shrubs Vines Herbs
red alder Pacific willow reed canarygrass
black cottonwood Sitica. willow soft rush
'etland Functions: intact fish habitat and hydrologic control; aesthetically pleasing; high enhancement
�tential; not appropriate for education; other functions moderate
Significant? � Yes ❑ No Remarks: intact fish habitat; intact hydrologic control
Restoration Opportunities: Manage invasive exotic species.
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Tanner 3
Plot #s: N/A
Code: TA-03 Field dates: 4/18/02
Size: 0.48 acres Method: ❑ on-site � off-site
• • ' ' •. � :
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� ,� u s x�, ,x a�wMr. a e�a tt.,,� �. r y �z* � iw� ��s r r; � e . � � s � a � w�. k- � �"+ ; � ., , . �, �s � .� ..
�
; $�.�� t�' �'� �3���� �� �s . - ' �, � � � �.�' ^� �'z f ��c � `Ea'�° � "� 3 +r a ' �>f dt `r t f r � � -` + ��
�.,�.�a.�.�r� ..a .�.,.�m�.�, �r � ..�,,,e�,�.�a��r"„9-.. .��,.,...,.r „�.�,�.�...�.�;�'.;,�� ��„�_:��..�..k:�;..
( 1 • . � � - � • � - � � . � • � � � ' � -
Legal description: Lots 500, 7800; T2S, R1E, Section 26 (Atlas # 5232)
Description (incl. topo. position, land use, basis): Wetland TA-03 follows upper Tanner Creek from the
Parker Road crossing and TA-02 (upstream) to Wild Rose Drive. The wetland is set aside in open space
as part of the surrounding residential development (in progress—see Det 99-0558). Wetland hydrology is
provided by Tanner Creek. The wetland boundary is defined by a distinct topographic break at the base
of valley side slopes and by a change in vegetation from reed canarygrass, willow and alder to Douglas
fir, Himalayan blackberry and upland grasses.
Soils; Delena Silt Loam, 3-12% slopes
Source: surface flow
Vegetation:
Trees Shrubs
red alder
willow sp.
Vines Herbs
reed canarygrass
etland Functions: intact hydrologic control, high enhancement potential has educational and
�reational uses; other functions moderate
Significant? � Yes ❑ No Remarks: intact hydrologic control
Restoration Opportunities: Manage invasive species, particulaxly reed canarygrass; replace
y with riparian buffer of native trees and shrubs.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
Wetland: Tanner 4 (Imperial Dr.)
Plot #s: N/A
Cowardin Class: PSS
Basin: Willamette River
Code: TA-04
Size: 0.25 acres
HGM Class: RFT
Sub-basin: Tanner Creek
Field da.tes: 4/23/02
Method: ❑ on-site � off-site
Investigatozs: TB, AK
Location/address: between Imperial Drive and I-205, across from Manchester Court
Legal description: Lots 119, 120, i58; TZS, R1E, Section 36 (Atlas # 5333, 5433)
Description (incl. topo. position, land use, basisj: Wetland TA-04 is an ash, willow and dogwood
dominated scrub-shrub wetland bordered by housing and located south of Imperial Drive. Tanner Creek
flows through the eastern edge of the wetland. Wetland hydrology is provided by stream overflow and
by groundwater discharge from hillside seeps. The wetland is set on a gentle southeast slope and backs
up to berm along the I-205 right-of-way. The toe of this berm defines the south wetland boundary,
Tanner Creek is the east boundary, and a change from ash, willow and dogwood to dense blackberry
marks the northwest bounciary. Some development has occurred since delineation was completed (see
Det 94-0354); in particular, fill and grading have altered and potentially eliminated wetland hydrology
and the small wetland area previously mapped to the east of Tanner and Imperial Drive and new homes
have reduced the size of the current wetland.
Soils: Borges Silty Clay Loam, 0-8% slopes
Hydrologic Source: surface flow, groundwater seeps
Dorninant Vegetation:
Trees
Shrubs
Oregon ash
Pacific willow
red-osier dogwood
Vines Herbs
reed canarygrass
Wetland Functions: intact fish habita.t, high enhancement potential; not appropriate for education; other.
functions maderate
Significant? � Yes ❑ No Remaxks: withiri 1/4 mile of WQ limited river
Potential Restoration Opportunities: Restore downcut streambed; manage reed canarygrass and
Himalayan blackberry.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Tanner 5
Code: TA-05
Field dates: 5/16/02
#s: N/A
Cowardin Class: PFO, PEM, POW
Basin: Willamette River
Size: I.34 acres
HGM Class: RFT
Sub-basin: Tanner Creek
Method: ❑ on-site � off-site
Investigators: TB, AK
Location/address: south of Parker Road, north of Beacon Hill Drive
Legal description: Lots 180Q, 420Q, 5600, 8000; T2S, R1E, Section 25 (Atlas # 5232, 5233, 5333)
Lots 7900, 8000; T2S, R1E, Section 26 (Atlas # 5232, 5233, 5333)
Lot 4200; T2S, R1E, Section 36 (Atlas # 5232, 5233, 5333)
Description (incl. topo. position, land use, basis): Wetland TA-OS is a�ong, mostly linear wetland along
the Tanner Creek channel with a mix of palustrine forested and emergent components and three stream-
associated ponds. Land to the south of this wetland is the site of new housing developments, with roads,
homes and stormwater facilities under constructian in Spring 2002. Wetland hydrology is provided by
surface flow and to a lesser extent by hillside seeps and sheet flow. The wetland boundary is defined by
topographic break at the toe of the valley side slopes where they meet the Tanner Creek channel
migration zone; at the ponds, the boundary foliows a sharp topographic break (top of bank) and/or a
vegetation change from reed canarygrass, nettle and ash to tall fescue, Douglas fir and Oregon white oak
as dominants. The boundary defined in Det 98-0092 appears accurate, and is extended east of Beacon
Hill in the Local Wetland Inventory mapping.
Soils: Borges Silty Clay Loam, 0-8% and Delena Silt Loam, 3-12%
Source: surface flow
Vegetation:
Trees Shrubs Vines
Oregon ash
Herbs
reed canarygrass
stinging nettle
Wetland Functions: diverse wildlife habitat, intact hydrologic function; low education and aesthetic
functions; other functions moderate
Significant? � Yes ❑ No Remarks: diverse wildlife habitat, intact hydrologic function; low
education and aesthetic functions; other functions moderate
Potential Restoration Opportunities: Control impacts from new development, including erosion and
sedirnentation, stormwater discharge, fill and. vegetation removal. Avoid wetland crossings and plant a
dense and wide buffer of native vegetation along the wetland edge in the vicinity of new development.
Manage invasive species.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Tanner 6 (wet meadow)
#s: N/A
Code: TA-06 Field dates: S/16/02
Size: 0.18 acres Method: ❑ on-site � off-site
� . ' - . :
:. . � ' . ,.
a��� �, �."r,�m .. v v . .n � '��tvy uG �'�'Y ;'� '� �� �1 s� u.�'� `, �e„ ` ��-::� wa "�`"�' z f�' �
��,'�'��,z�n���'�'v.�ro���.�,��,�Wx���',"�.+�,�,..z�,�rs`a� �.�t..:a.�,����s,. � 4.v.�"��'2✓.�:��„���
� • .�� " • � � ' �•.• - � i'. • .�' ' �
description: Lot 1800; T2S, R1E, Secrion 25 (Atlas # 5233)
Description (incl. topo. position, land use, basis): TA-06 is a group of �four wet meadows on a south
facing slope, south of Parker Road. The surrounding land use is primarily open space, with new housing
developrnent occuring south of Tanner Creek. The wet meadows appear to be groundwater-fed,
headwater slope wetlands dominated by common camas, western buttercup and wetland grasses; viewing
from a distance suggested that the Det 98-0092 delineation is reasonably accurate, with a boundary at
least partly defuied by vegetation change.
Soils: Borges Silty Clay Loam, 0-8% slopes
Source: groundwater seeps
Vegetation;
Trees. Shrubs
etland Functions: all functions low or moderate
Vines Herbs
common camas
western buttercup
Significant? ❑ Yes � No Remarks: criteria not met
Restoration Opportunities: none noted
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Tanner 7 (ash forest)
ot #s: N/A
>wardin Class: PFO
isin: Willamette River
Code: TA-07
Size: 0.69 acres
HGM Class: SH
Sub-basin: Tanner Creek
Field dates: 5/16/02
Method: ❑ on-site � off-site
Tnvestigators: TB, AK
; south of Parker Road, west of Beacon Hill Lane extension
descriprion: Lot 1800; T2S, R1E, Secrion 25 (Atlas # 5233)
Description (incl. topo. position, land use, basis): Wetland TA-07 is a group of ash dominated wetlands
adj acent to TA-06 that could not be accessed or viewed, except for identification of canopy layer. No
development related disturbance was observed and the recent delineation (Det 98-0092) was assumed to
be accurate. The wetlands are on a gentle south-facing slope, surrounded by open space. Wetland
hydrology is assumed to be provided by groundwater seepage, similar to the adjacent TA-06.
Borges Silty Clay Loam, 0-8% slopes
Source: groundwater seeps
Vegeta.tion:
Trees Shrubs Vines Herbs
Oregon ash (na view of shrub and ground layer plants)
Wetland Functians: high enhancement potential; all other functions low or moderate
❑ Yes � No Remarks: criteria nat met
Potential Restoration Opportunities: none noted
West Linn Goa15 Inventory
Wetland Characterizahon Sheef
etland: Tanner 8
�t #s: N/A
>wardin Class: PFO
�sin: Willamette River
Code: TA-08
Size: 0.39 acres
HGM Class: RFT
Sub-basin: Tanner Creek
Field dates: 5/16/02
Method: ❑ on-site � off-site
Investiga.tors: TB
Location/address: north of Fairhaven Drive, east of North Hampton Court
description: Lots 4300, 4400, 7700; T2S, R1E, Section 36 (Atlas # 5333)
Description (incl. topo. position, land use, basis): Wetland TA-08 is ash dominated wetland along Tanner
Creek, which widens in areas of braided channels and local seeps. Residential home and road
construction are occuririg on all sides of the wetland. Wetland hydrology is provided both by stream
flow and by local groundwater seeps. The wetland boundary is defined by a topographic break at the
base of the ravine slopes, and by a change in vegetation from ash and salmonberry to Oregon white oak,
Douglas fir and snowberry. Delineation Det 97-0543 appears reasonably accurate.
Soils: Borges Silty Clay Loam, 0-8% slopes
Hytirologic Source: surface flow, seeps
Vegetation:
Trees Shrubs
Oregon ash salmonberry
Vines
Herbs
stinging nettle
soft rush
water parsley
etland Functions: Iugh enhancement potential, low educational value; other functions moderate
Significant? ❑ Yes � No Remarks: criteria not met
itial Restoration Opportunities: Manage and treat stormwater and impacts from new development on
sides of wetland.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Tanner 9
#s: DP-1, DP-2
Class: PSS, PFO
: Willamette River
Code: TA-09
Size: 1.58 acres
HGM Class: RFT
Sub-basin: Tanner Creek
Field dates: 5/2/02
Method: � on-site ❑ off-site
Investigators: TB, AK
south of Fairhaven Drive to vicinity of Tanner Creek Lane
Legal description: T,ots 500, 3100, 3200, 3600, 3700, 3800, 6600, 7000, 7800; T2S, R1E, Section 36
(Atlas # 5333)
Description (incl. topo. position, land use, basis): Wetland TA-09 follows Tanner Creek down a gentle
gradient south from Fairhaven Drive for approximately 1,000 feet to the area of Tanner Creek Lane. It is
bordered by roads and recent residential development. It contains a mi7c of palustrine forested and scrub-
shrub components with ash, willow and cottonwood dominant in the former and red-osier dogwood in the
latter. The wetland also includes two sma.11 ponds, one on each side of Tanner Creek Lane, connected by
three 4-foot diameter culverts (creating a continuous open water connection). The wetland widens in
several locations: where hillside seeps occur (upstream), where the stream channel is braided, at the
Salamo Creek confluence, and at the ponds. Wetland boundaries in the southem part of the wetland are
defined by distinct topographic breaks at the base of ravine slopes and/or fill embanlanents; to the north,
south of Fairhaven, Tanner Creek defines the eastern boundary and the western (upslope) boundary is at
the point where Oregon ash and soft rush transition to cottonwood with a mixed understory of upland
dominated species, including Himalayan blackberry. Boundaries of Det 97-0551 were slightly adjusted
to reflect new roadfill and grading.
Soils: Borges Silty Clay Loam, 0-8°/a slopes
Source: surface flow, groundwater (seeps)
Vegetation:
Trees
Oregon ash
Pacific willow
black cottonwood
Shrubs Vines
red-osier dogwood
Herbs
reed canarygrass
soft rush
creeping buttercup
etland Functions: intact hydrologic control, high enhancement potential, low educational value; other
functions moderate
Significant? � Yes ❑ No Remarks: intact hydrologic control
Potential Restoration Opportunities: Manage and pretreat stormwater inputs; control reed canarygrass
and Himalavan blackberrv.
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Trilliuxn 1 (ash forest)
Code: TR-01
Field ciates: 4/23/02
Plot #s: N/A
Size: 1.59 acres
Method: � on-site � off-site
Cowardin Class: PFO, PEM HGM Class: SH Investigators: TB, LW
Basin: Willamette River Sub-basin: Trillium Creek
Locataon/address: east of Rosemont Rd., near Bay Meadows Dr.
description: Lot 12500; T2S, R1E, Section 23 (Atlas # 5031, 5131)
Lots 5500, 12500, 12600; T2S, R1E, Section 26 (Atlas # 5031, 5131)
Description (incl. topo. position, land use, basis):
Wetland TR-Ol is located at the headwaters of Trillium Creek adjacent to Rosemont Road. It is bordered
by School District open space to the north and east, and residential development to the south and west.
The wetland is situated at the ridgetop with a very gentle slope to the north in the direction of the
emerging stream channel. Wetland hydrology is provided by groundwater seepage near Rosemont Road
along the southern School District property boundary. The wetland boundary is defined by a slight
topographic rise and a transition from Oregon ash, red-osier dogwood and common camas to Oregon
white oak, dewberry and Himalayan blackberry as dominants. The Local Wetland Inventory mapping
extends delineation RM 1093 west of the School District property.
Soils: Cascade Silt Loam, 8-15% slopes and Cornelius Silt Loam, 8-15% slopes
Hydrologic Source: groundwater, seeps
Dominant Vegetation:
Trees Shrubs Vines Herbs
Oregon ash red-osier dogwood common camas
Wetland Functions: diverse wildlife habitat, intact fish habitat; recreation not appropriate; other
functions moderate
Significant? � Yes [] No Remarks: diverse wildlife habitat, intact fish habitat
Potential Restoration Opporiunities: None noted (diverse habitat).
West Linn Wetland Characterization Sheet
West Linn Goal 5 Inventory
Wetland Characterizatian Sheet
Wetland: Trillium 2 (ash forest)
#s: N/A
Cowardin Class: PSS, PFO
Willamette River
Code: TR-02 Field dates: 4/23/02
Size: 0.59 acres Method: ❑ on-site � off-si.te
HGM Class: 5H Investigators: TB, LW
Sub-basin: Trilliutn Creek
Location/address: south of Hidden Springs Rd. east of Rosemont Rd.
Legal description: Lots 11000, 11100, 12301, 12500; T2S, R1E, Section 23 (Atlas # 5031, 5032)
Description (incl. topo. position,land use, basis): Wetland TR-02 is approximately 300 feet downstream
of TR-01. It is similar in character (see TR-Ol description), but with significant encroachment by
Himalayan blackberry. The wetland follows the low point in the valley along Trillium Creek. Oregon
ash is a dominant species and the wetland is bordered by Douglas fir to the south and European hawthorn
to the north. Site access was limited due to blackberry, but Delineation RM 1093 was assumed to be
accurate.
Soils: Hardscrabble Silt Loam, 2-7% slopes
Hydrologic Source: surface flow, seeps
Dominant Vegetatipn:
Trees Shrubs Vines
Oregon ash Oregon ash Himalayan blackberry
Wetland Functions: diverse wildlife habitat
Herbs '
Significant? � Yes ❑ No Remarks: diverse wildlife; recreation not appropriate; other functions
Restoration Opportunities: Diverse habitat; however, major blackberry eradication is wananted.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
Wetland: Trillium 3 Code: TR-03 Field dates: 4/23/02
Plot #s: DP-1, DP-2 Size: 2.06 acres Method: � on-site � off-site
Cowardin Class: PFO, PEM, PSS HGM Class: RFT Investigators: TB, LW
Basin: Willamette River
Sub-basin: Trillium Creek
Location/address: north of Cedaroak Dr., west of Trillium Dr.
Legal descriprion: Lots 7700, 8000, 8100; T2S, RlE, Section 13 (Atlas #4833, 4933)
Lots 200, 203, 300, 400, 900, 1000, 1101, 1102, 1200, 1300, 1301, 7900, 8100; T2S,
R1E, Section 24 (Atlas #4833, 4933)
Description (incl. topo. position, land use, basis): Wetland TR-03 is associated with Trillium Creek
where it flows north of Cedaroak Drive and para11e1 to Trillium Drive and Ridgewood Way. 'This is an
area surrounded by residential development. In most parts of this reach, the banks above the floodplain
are steep and high. The exception is part of the northeast bank, which is lower and has housing built near
the stream. Wetland hyclrology is provided by stream flow, and water is entering from several side
channels as well as the main stream. The weYland occupies much of the floodplain of the creek. The
wetland boundary is defined by skunk cabbage and/or lady fern on the wetland side, and big-leaf maple,
English ivy, and waterleaf on the upland side. Red alder and Himalayan blackberry are common in both
upland and wetland communities. Other common upland plants are trailing blackberry and western
virgin's-bower.
Soils: Woodburn Silt Loam, 8-15% slopes
Source: surface flow
Dominant Vegetation:
Trees Shrubs Vines Herbs
red alder red-osier dogwood Himal. blackberry lady fern
salmonberry skunk cabbage
Wetland Functions: intact fish habitat and hydrologic control; high enhancement potential; not
appropriate for education or recreation; other functions moderate
Significant? � Yes ❑ No Remarks: intact fish habitat and hydrologic control; connected to
salmonid stream
tial Restoration Opportunities: Manage invasive exotics; wetland conversion has occurred at the
end of wetland -- some restoration of wetland functions is possible in this area.
West Linn Wetland Characterization Sheet
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Trillium 4
#s: DP-1, DP-2
Code: TR-04 Field dates: 4/18/02
Size: 0.93 acres Method: � on-site � off-site
Cowardin Class: PSS HGM Class: RFT Investigators: TB, AK
Basin: Willamette River Sub-basin: Trillium Creek
Location/address: north of Elmran Dr., between Trillium Dr. and Calaroga Dr.
description: Lots 1800, ZI00, 2400, 2500, 2501, 2502, 3000, 3200, 4500; TZS, RlE, Section 13
# 4833)
Description (incl, topo. position, land use, basis): Wetland TR-04 is located on a wide floodplain terrace
bordering Lower Trillium Creek. Above the wetland rise steep ravine slopes, with residences located
near the edge of the ravine. The wetland extends north (downstream) from Elmran Drive, approximately
800 feet before the ravine banks narrow to the width of the channel. Wetland hydrology is provided by
stream overflow and by groundwater seepage at the base of the ravine banks. The wetland boundary is
defined by a sharp topographic break at the base of these slopes, where dominant wetland species,
including red-osier dogwood and lady fern, are replaced by big-leaf maple, Douglas fir, osoberry and
sword fern on the slopes.
Soils: Woodburn Si1t Loam, 8-IS% slopes
Hydrologic Source: surface flow, seeps
Dominant Vegetation:
Trees Shrubs Vines Herbs
red-osier dogwood lady fern
red alder
Wetland Functions: intact fish habitat and hydrologic control; high enhancement potential, low
education, recreation and aesthetic values; other functions moderate
Significant? � Yes � No Remarks: intact fish habitat and hydrologic control
Potential Restoration Opportunities: Manage encroaching invasive species, including English ivy and
Himalayan blackberry.
West Linn Wetland Characterization SheeP
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Swift Shore Open Space
Code: TU-O 1 Field dates: 3/20/02
Plot #s: DP-1, DP-2 Size: 1.14 acres Method: � on-site ❑ off-site
Cowardin Class: PEM HGM Class: RFT Investigators: TB, LW, AK
asin: Tualatin River
Sub-basin: Tualatin River
south of Kimberly Drive north of Tua.latin River, west of Weiss Bridge
descniption: Lots 2836, 4001; T3S, R1E, Section 02 (Atlas #5531)
Description (incl. topo. position, land use, basis): Wetland TU-01 is associated with the Tualatin River.
It is located south of Kimberly Drive, on a low terrace adjacent to and north of the river. The wetland is
partly withvn Swift Shores Open Space, and single family housing occupies the land upslope from the
terrace. The wetland is an approximately 1,000 ft. long and generally narrow swale with a small pond at
each end. The west pond was designed as a stormwater detention facility named the Swift Shores
Detention Pond. Local high school students are planting and maintaining the streambanks and terrace
and are monitoring aquatic life in the pond. The east pond is also excavated, and both have one or more
small overflow channels connecting to the Tualatin River. Wetiand hydrology is provided by stormwater
discharge (precipitation) and to a lesser extent stream flow; the two ponds ma.y also intercept a high
water table. Reed canarygrass dominates most of the wetland, and wetland shrub species grow on the
pond edges. The adj acent uplands support varying combinations of Douglas fir, grand fir, Oregon white
oak, and big-leaf maple. Other common upland species are trailing blackberry and orchard grass.
Soils: Cloquato Silt Loam
Hydrologic Source: precipitation, surface flow
Dominant Vegetation:
Trees Shrubs
red alder red-osier dogwood
Oregon ash Sitka willow
Douglas spiraea
Vines Herbs
Himalayan blackberry reed canarygrass
soft rush
Wetland Funcrions: high enhancement, educational and recreational values; other functions moderate
Significant? � Yes ❑ No Remarks: Habitat for sta.te-listed sensitive species (red-legged frog
breeding site); connected to salmonid stream; within 1/4 mile from WQ stream
Potential Restoration Opportunities: Support high school monitoring and enhancement efforts; manage
reed canarygrass and other invasives.
rr�..... I:..� R)��_._J !q" _""_..'_'__«_.. OL_..
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Tualatin Wet Meadow Code: TU-02 Field dates: 3/20702
�t #s: (See wd00-0514) Size: 0.3 acres Method: ❑ on-site � off-site
Cowardin Class: PEM
: Tuatatin River
Sub-basin: Tualatin River
Location/address: south of Willamette Falls Drive at Borland Bridge
description: Lots 300, 400; T2S, R1E, Section 34 (Atlas #5429)
Description (incl, topo. position, land use, basis): Wetland TU-02 is on a broad terrace between
Willamette Falls Drive and the Tualatin River on the west edge of town and south of the Borland Bridge.
The land was farzned, but is now a city park. The terrace is an upland field dominated by tall fescue,
with a cluster of three small wetland depressions on the south side of the field. Wetland hydrology is
provided by precipitation and sheetflow. The wetland boundary is at the shift in vegetation from reed
canarygrass dominance to tall fescue dominance. A recent boundary delineation (WD 00-OS I4) and
survey was confirmed by visual on-site observation of vegetation and hydrology.
Soils: Newberg Fine Sandy Loam
gic Source: precipitation, sheetflow
Vegetation: '
Trees Shrubs Vines Herbs
reed canarygrass
Wetland Functions: has educational and recreational uses; other functions maderate
Significant? � Yes ❑ No Remarks: within 1/4 mile of WQ limited stream
Potential Restoration OpporYunities: Integrate native emergent species while managing reed canarygrass.
HGM Class: DCNP Invesiigators: TB, LW, AK
Tu �� r:.,.. n,_.t__� nL----'-'_--`-_ m.__.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Tualatin
#s: (see wd00-0514)
Cowardin Class: PFO
Basin: Tualatin River
Sub-basin: Tualatin River
: south of Willamette Falls Drive near Borland Bridge
description: Lots 400, 500; T2S, RlE, Section 34 (Atlas #5429)
Description (incl. topo. position, land use, basis): Wetland TU-03 is ari old oxbow slough between
Willamette Falls Drive and the Tualatin River on the west edge of town and south of the Borland Bridge.
The slough is now part of a City Park. Wetland hydrology is provided by overflow from the Tualatin
River. The wetland boundary is defined by an abrupt topographic break and by a shift in vegetation from
reed canarygrass to Himalayan blackberry as a dominant species. A recent boundary delineation (WD
00-0514) and survey was confirmed by visual on-site observation of vegetation and hydrology.
Soils: Newberg Fine Sandy Loam
ic Source: surface flow
Vegetation:
Trees Shrubs
Oregon ash willow
red-osier dogwood
Vines Herbs
reed canarygrass
Wetland Functions: high enhancement potential; has recreational uses; low aesthetic value; other
functions moderate
Significant? � Yes ❑ No Remarks: connected to salmonid stream; within 1/4 mile of WQ limited
stream
Potential Restoration Opportunities: Manage reed canarygrass and blackberry to allow native flora to
survive.
Code: TU-03 Field dates: 3/20/02
Size: 1.89 acres Method: ❑ on-site � off-site
HGM Class: RFT Investigators: TB, LW, AK
� �. �;,.., n,_.,--, ,,, -- --•--�------- ��----
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Brandon Swale Code: TU-04 Field dates: 3/20/02
�t #s: DP-1, DP-2 Size: 0.13 acres Method: � on-site ❑ off-site
Class: PEM HGM Class: RFT Investigators: LW, AK, TB
� o �. � '
��e�� � '�' �� ��� ��t � �- ��,� � i � rr �� ��a� �° ,� ' � � ;1 �r�
a � ,- � "� �
.�,,, w3�.�.�a�,��.,.�e... 3s�,, c.�s,d.:, „r:�.�.�Yk.� s...�.,���.,�.�,v .,���,�: ? .�.� .. �� �_>� w��
1 1 . � � • i � � � . • I ' 1 " 1 �
description: Lot 3700; T2S, R1E, Section 34 (Atlas #5429)
Description (incl. topo: position, land use, basis): Wetland TLT-04 is located north of Willamette Falls
Drive near the Borland Bridge at the west edge of town. The wetland is along the bottom of a 400-foot .
constructed swale between the Tualatin River and an adjacent housing development. It was constructed
to receive runoff from the housing area and to divert floodwaters during storm events. Wetland
hydrology is provided by precipitation and collected stormwater runoff. The swale empties into the,
Tualatin River about 150 feet downstream from the sample site. The wetland boundary is confined to the
bottom of the swale. Upland vegeta.tion is a mixture of turf grasses dominated by tall fescue and
bluegrasses that are regularly mowed.
Soils: McBee Variant Loam
Source: precipita.tion and surface flow (stormwater)
�
Vegetation:
Trees Shrubs Vines Herbs
red aTder reed canarygrass
etland Functions: has educational uses; other functions moderate
Significant? ❑ Yes � No Remar�CS: Is artificially created from upland (meets exclusion criterion);
sta.te jurisdiction has not been determined.
Restoration Opporlunities: Native shrub plantings along and above the swale banks may
wetland functions.
West Linn Wetlarut Characterization.Sheet
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Tualatin Open Space
Plot #s: DP-1, DP-2
Cowardin Class: PEM, PFO
: Tua.latin River
Sub basin: Tualatin River
west of Michael Court aud south of Johnson Road along western city limits
description: Lots 1200, 1300, 1501, 8400; T2S, R1E, Section 34 (Atlas #5330, 5430)
Description (incl. topo. position, land use, basis): Wetland TU-05 is located west of Michael Drive, on
the Tualatin River floodplain at the bottom of a high, steep embankment. The south part of the wetland
is in the Tt.�alatin River Open Space, and the north part is in private ownership. The broad wetland swale
is probably the remnant of an old river channel. Historic and current land uses and manipulatian have
resulted in a wetland complex with varying water depths and plant communities. Wetland hydrology is
provided primarily by subsurface discharge from the adj acent embankments and interception of the high
water table. The Tualatin River fiunishes additional waters from winter overflow during flood events.
Water from TU-OS empties into the Tualatin River through an outflow channel to the west. The wetland
boundary on the southeast side is at a sharp topographic break at the foot of the embankment. The west
and north bonndaries are less sharQly defined by topography, but in most places are well marked by the
shift from wetland to upland vegetation. Uplands on the west side in the park are dominated by
a�ricultural clover and turf grasses including fescue, bluegrass and bentgrass. The east and south
ernbankments are dominated by big-leaf ma,ple and Himalayan blackberry.
Soils: Wapato Silty Clay Loam
Source: groundwater
Vegetation:
Trees Shrubs
willows
red-osier dogwood
Douglas spiraea
Vines
Herbs
reed canarygrass
slough sedge
Wetland Functions: intact hydrologic control; high enhancement potential; has recreational uses; other
functions moderate
Significant? � Yes ❑ No Remarks: intact hydrologic control; connected to salmonid stream;
within 1/4 mile of WQ limited stream
Potential Restoration Opportunities: Manage invasive species; enhance woody vegetative buffer to the
Code: T[J-OS Field dates: 3/21/02
Size: 3.82 acres Method: � on-site ❑ off-site
HGM Class: RFT Investigators: TB, LW, AK
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Turkey Creek Code: TY-01 Field dates: 4/23/02
�t #s: DP-1, DP-2 Size: 0.16 acres Method: � on-site ❑ off-site
Cowardin Class: PEM
Basin: Willamette River
Sub-basin: Turkey Creek
Location/address: east end of Mary S. Young Park, along boardwalk trail
Legal description: Lot 600; T2S, R1E, Section 24 (Atlas #4934, 5034)
Description (incl, topo. position, land use, basis): Wetland TY-O 1 is associated with Turkey Creek, which
flows th�rough Mary S. Young Park. The. creek is confined to a relatively narrow channel that widens
when it leaves a steep ravine. It is a palustrine emergent wetland, with ponding near the sample site;
upstream is a skunk cabbage community. Wetland hydrology is provided by stream flow. The wetland
boundary is at a rather sharp topographic break dividing the floodplain from the ravine side slopes. This
is the point where red alder and salmonberry are replaced by big-leaf maple and Himalayan blackberry.
Other upland dominants are Oregon wlute oak, �red elderberry, English ivy, waterieaf, and sword fern.
Soils: Xerochrepts and Haploxerolls, very steep
Aydrologic Source: surface flow
Vegetation:
Trees Shrubs
red alder salmonberry
Vines Herbs
piggy-back-plant
giant horsetail
Wetland Functions: has both educational and recreational values; is not sensitive, other functians
Significant? � Yes ❑ No Remarks: within 1/4 mile of WQ limited stream
Potential Restoration Opportunities: Some debris and dumping fill was noted along the boardwalk;
remove any fill and debris and train staff to keep any such matter out of the wetland.
HGM Class: RFT Investigators: TB, LW
.,,�,---".,-----�----•,-._ �,.__.
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Willamette Park area Code: WI-01 Field dates: 4/3/02
Plot #s: DP-1, DP-2 Size: 8.09 acres Method: � on-site ❑ off-site
Cowardin Class: PEM, PFO
Willamette River
Willamette Park to 9"' Street
Snb-basin: Willamette River
Legal description: Lots 100, 102, 300, 505, 506, 507, 700, 800, 902, 903, 2200; T3S, R1E, Section 02
(Atlas #5532)
Description (incl. topo. position, land use, basis): Wetland WI-01 is a large wetland located partly in
Willamette Park, which is just downstream from the mouth of the Tualatin River. WI-01 is a large and
diverse wetland with emergent and forested communities, small shrub thickets, and shallow ponds. The
wetland was enhanced to mitigate the construction of a new baseball field. Wetland hydrology is
provided by stormwater discharge and interception of the high water table. Water from WI-OI drains to
culverts under 9�' Street at two locations north and south of a developed island of higher ground.
Wetland boundaries to the north are at sharp topographic breaks, but others on more gradual slopes
boundaries are determined by the shift from wetland to upland vegetation. Uplands at the sample site
were dominated by cultivated clovers and turf grasses including tall fescue, orchard grass, and Colonial
bentgrass. Scattered trees and shrubs have been planted, both native and introduced species, along the
edees of the wetland.
Soils: Wapato Silty Clay Loam
Source: precipitation, groundwater
Vegetation:
Trees Shrubs
Pacific willow
willow sp.
Vines
Herbs
reed canarygrass
soft rush
small-fiuit bulrush
etland Functions: intact hydrological control; has educational and recreational uses; high enhancement
tential; other functions moderate
Significant? � Yes ❑ No Remarks: intact hydrological control; within 1/4 mile of WQ limited
stream
Restoration Opportunities: Manage invasives such as reed canarygrass and blackberry; restore
HGM Class: RFT Investigators: LW, TB
degraded pasture lands.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
Wetland: Willamette la Code: WI-Ola Field dates: 4/3J02
Plot #s: n/a Size: 0.84 acres Method: ❑ on-site � off-site
Cowardin Class: PEM
Willamette River
Sub-basin: Willaxnette River
South end of 11�' Street, northwest corner of Willamette Park
d�scription: Lots 2200, 4402, 4601; T3S, R1E, Section 02 (Atlas #5532)
Description (ix�cl. topo. position, land use, basis): Wetland WI-Ola is situatted on the Willamette
lowlands at the base of south-sloping Iullsides and is bordered on the south and east by Willamette Park
and by residential uses to the west. The boundaries of this relatively small emergent wetland are defined
by fill associated with park ballfield construction to the south and east, new home construction to the
west, and a hillside slope to the north. This wetland was recently planted with native vegetation,
primarily wetland shrub species, and is otherwise dorninated by reed canarygrass, particularly along the
north side. Wetland hydrology is provided by precipitation in the form of sheet flow and potentially by
stormwater discharge from pipes. It is also provided by groundwater discharge from seeps at the foot of
the hillside. The LWI mapping modifies delineation DET 97-0441 to reflect new fill to the west and to
connect to delineation WD 2002-007.
Soils: Wapato Silty Clay Loam
Hydrologic Source: precipitation, groundwater
Dominant Vegeta.tion:
Trees Shrubs Vines Herbs
Pacific willow reed canarygrass
black cottonwood
Wetland Functions: high enhancement potential; not appropriate far educational use, other functions
moderate
Significant? � Yes ❑ No Rernarks: within 1/4 rnile of WQ limited stxeam
Potential Restoration Opporttuiities: Native plantings have recently been installed, possibly as part of
mitigation for new house construction and fill; manage reed canarygrass
HGM Class: RFT Investigators: TB, LW
v,__"____ rrr,..r__� nr____.,..,�......-... nr.__.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Willamette-9� St. East Code: WI-02 Field dates: 4/4/02
�t #s: DP-1, DP-2 Size: 15.55 acres Method: � on-site ❑ off-site
Cowardin Class: PEM, PFO
asin: Willamette River
Sub-basin: Willamette River
Location/address: North of Volpp Street, between 4� and 9` Streets
Legal description: Lots 100, 200; T3S, RlE, Section O1 (Atlas #5432-33, 5532-33)
Lots 100, 200, 800, 1000, 1201, 1302, 2200, 6900, 6902, 7700, 7800, 8100, 8200,
8201, 8202, 8203; T3S, R1E, Section 02
Lot 200; T2S, R1E, �ection 35 (Atlas #5432-33, 5532-33)
Lot 200; T2S, R1E, Section 36 (Atlas #5432-33, 5532-33)
Description (incl. topo. position, land use, basis): Wetland WI-02 is the largest wetland in the city, and is
east of 9th Street, north of a grazed pasture, and south of new housing development. The wetland has a
mixture of emergent and forested communities and small shrub thickets. Wetland hydrology is provided
by stormwater runoff, subsurface dischaxge and surface flow from Wetland WI-01. Water from WI-02
empties into a culvert under 4� Sixeet, before entering Wetland WI-03. Wetland boundaries are generally
at sharp topographic breaks, but others on more gradual slopes (e.g., pastures) are marked by the shift
from wetland to ttpland vegetation. Uplands at the sample site (grazed land) were dominated by pasture
grasses including tall fescue, timothy, and Colonial bentgrass. Himalayan blackberry was present on the
edges of the field.
Soils: Wapato Silty Clay Loam
Hydrologic Source: precipitation, groundwater, surface flow
Dominant Vegetation:
Trees Shrubs
Oregon ash Pacific willow
willow sp.
Vines
Herbs
bluegrass spp.
buttercup
small-fruit bulrush
Wetland Functions: intact hydrologic control; high enhancement potential; low aesthetic value; other
fixnctions moderate
Significant? � Yes ❑ No Remarks: intact hydrologic control; withi.n 1/4 mile of WQ limited
stream
HGM Class: RFT Investigators: TB, LW, AK
Potential Restoration Opportunities: Recent flooding may be helping to manage exotic grasses, although
reed canarygrass remains comrnon. Cows have some access to the stream channel and this has caused
erosion; efforts to reduce or eliminate stream crossings rnay improve wetland functions.
West Linn Goa15 Inventory
Wetland Characterization Sheet
etland: Willamette-4� St. East Code: WI-03 Field dates: 4/5/02
�t #s: DP-1 to DP-4 Size: 2.85 acres Method: � on-site ❑ off-site
Cowardin Class: PSS
Basin: Willamette River
Sub-basin: Willamette River
Location/address: East of 4�' St., west of Blue Heron Paper treatment lagoon
Legal description: Lots 101, 1700; T2S, R1E, Section 36 (Atlas #5433, 5533)
Lots 100, I01, 1700, 1800; T3S, R1E, Section O1 (Atlas #5433, 553
Description (incl. topo. position, land use, basis): Wetland WI-03 is a large wetland east of 4th Street,
that is hydrologically linked to Wetlands WI-02 and WI-O 1. There are paper treatment lagoons to the
east and west of it, housing to the north, and the Willamette River to the south. Most of the wetland edge
is undeveloped open space owned by the paper companies. The wetland is primarily a shrub-scrub
community with a few small emergent openings. Wetland hydrology is provided by stream flow with
lesser amounts of subsurface discharge from springs and seeps. Surface flow from the other Willamette
lowland wetlands flows through the center of the wetland in a wide channel (averaging 20' wide) which
is backed up behind a beaver dam at the east end of the wetland. Water from WI-03 empties into the
Willamette River via Bernert Creek. Wetland boundaries are marked by the shift from wetland to upland
vegetation. An area south of the open channel contains a mosaic of 60% wetland / 40% uplands, with
wetland areas dominated by Oregon ash, Pacific ninebark, Douglas spira.ea and slough sedge,
interspersed with upland areas containing European hawthorn, snowberry and tall Oregon grape.
Uplands at the sample sites were dominated by woody species including red alder, snowberry, clustered
rose and Himalayan blackberry.
Soils: Wapato Siity Clay Loam
Hydrologic Source: surface flow, groundwater seeps
Dominant Vegetation:
Trees Shrubs
Oregon ash Douglas spiraea
red alder Pacific ninebark
Pacific willow red-osier dogwood
willow sp.
Vines Herbs
Wetland Functions: diverse wildlife habitat, intact fish habitat and hydxologic control; has recreational
uses; low aesthetic value; other functions moderate
Significant? � Yes ❑ No Remarks: diverse wildlife habitat, intact fish habitat and hydrologic
control; connected to salmonid stream; 1/4 mile from WQ limited stream
HGM Class: RFT Investigators: TB, LW, AK
Restoration Opporiunities: Diverse habitat; limited enhancement opportunities include selective
of European Hawthorn and other exotics (e.�., blackberrv).
West Linn Goal 5 Inventory
Wetland Characterization Sheet
etland: Willamette Bench-4
Plot #s: DP-1, DP-2
Cowardin Class: PEM, PFO
Basin: Willamette River
Code: WI-04 Field dates: 4/23/02
Size: 10.71 acres Method: � on-site ❑ off-site
HGM Class: RFT Investigators: TB, LW
Sub-basin: Willamette River
Location/address: West Terrace of Willamette River, south of Cedar Island
Lega1 description: Lots 100, 20Q, 300, 400, 500, 600; T2S, R1E, Section 24 (Atlas #4934, 5034)
Description (incl. topo. position, land use, basis): Wetland WI-04 is located at the east edge of Mary S.
Young State Park. It is on a river terrace on the west bank of the Willamette River. The river is to the
east, and a moderately sloped bank rises to the west. Wetland hydrology is provided by overflow from
the river during high water. The wetland boundary is generally at the foot of the west bank. In some
spots upland azeas extend out on the terrace. These boundaries are defined by changes from wetland to
upland vegetation and/or changes in soil colors. Uplands are dominated by big-leaf maple, red alder,
black cottonwood, English ivy, hazel-nut, and waterieaf.
Soils: Newberg Fine Sandy Loam
Source: surface flow
Vegeta.tion:
Trees Shrubs Vines Herbs
Pacific willow black cottonwood reed canarygrass
etland Functions: intact hydrologic control; has educational and recreational uses; high enhancement
tential; other functions moderate
Significant? � Yes ❑ No Remarks: intact hydrologic control; connected to salmonid stream;
within 1/4 mile of WQ limited stream
Restoration Opporiunities: Manage reed canarygrass; add native shrub layer.
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Cedaxoak pond Code: WI-OS Field dates: 4/23/02, 6/27/02
Plot #s: DP-1, DP-2 Size: 0.21 acres Method: � on-site ❑ off-site
Cowardin Class: PEM
in: Willamette River
Sub-basin: Lower Willamette River
Cedaroak Boat Ramp (south of parking lot)
description: T2S, R1E, Section 13 (Atlas #4833-34)
Description (incl. topo. position, land use, basis): Wetland WI-OS is a shallow pond at the south end of
the Cedaroak Boat Ramp site with an outflow channel to the Willamette River across from Cedar Island.
The pond is located in the floodplain at the base of the east-facting river terrace above the floodplain.
Residential uses axe located on the terrace to the west, and open space uses border the wetland on the
other sides. Wetland hydrology is provided by surface flow from a small drainageway, high river flows
and by precipitation (sheetflow) from adj acent uplands. The wetland boundary is defined by the limits of
Himalayan blackberry (rooting) and a topographic break at the pond edge. .
Soils: Chehalis Salt Loam, Riverwash
Source: surface flow, precipitation
Vegetation:
Trees Shrubs
Pacific willow Himalayan blackberry
Vines Herbs
reed canarygrass
stinging nettle
Wetland Functions: ha.s educational and recreational uses; other functions moderate
Significant2 � Yes ❑ No Remarks: direct connection to salmonid stream; within 1/4 mile of WQ
limited stream
HGM Class: RFT Investigators: TB, LW
Potential Restoration Opportunities: Manage reed canarygrass and Himalayan blackberry.
West Linn Goal 5 Inventory
Wetland Characterization Sheet
Wetland: Cedaroak wetland Code: WI-06 Field dates: 5/2/02
Plot #s: DP-1, DP-2 Size: 2.7 acres Method: � on-site ❑ off-site
Cowardin Class: PEM, PFO
Basin: Willamette River
HGM Class: RTT Investigators: TB, LW
Sub-basin: Lower Willamette River
Location/address: North of Cedaroak Boat Ramp, along Willamette River
Legal description: Lots 500, 601, 700, 800; T2S, R1E, Section 13 (Atlas #4833-34)
Description (incl. topo. position, land use, basis): Wetland WI-06 is located adjacent to the Willamette
River on a low floodplain terrace. The wetland borders the Cedaroak Boat Ramp parking lot to the south,
the river to the north and east, and residential uses to the west. The wetland is composed of both
palustrine emergent and forested classes, with reed canarygrass as the emergent dominant and black
cottonwood and Pacific willow as forest dominants. Wetland hydrology is provided by surface flow
from a small hillside drainageway and from Willamette River high flows. The wetland boundary is
defined by the toe of the west hillslope and the south road fill, and by the Willamette River elsewhere.
Soils: Chehalis Silt Loam
Source: surface flow
Vegetation:
Trees Shrubs Vines Herbs
black cottonwood Pacific willow reed canarygrass
Wetland Functions: high enhancement potential; not appropriate for educational use, has recreational
use: other functions moderate
Significant? � Yes ❑ No Remarks: direct connection to salmonid stream; within 1/4 mile of WQ
limited stream
ial Restoration Opportunities: Manage reed canarygrass and replace Himalayan blackberry with a
shrub buffer.
West Linn Wetland Characterization Sheet
West Linn Goa15 Inventory
Wetland Characterization Sheet
Wetland: Willamette Bend
Plot #s: n/a
Code: WI-07 Field dates: 5/23/02
Size: 6.28 acres Method: ❑ on-site � off-site
Cowardin Clas�: PEM HGM Class: RFT Investigators: TB
Basin: Willamette River Sub-basin: Willamette River
Location/address: East of River Street, on floodplain upstream of Goat Island
Legal description: Lots 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400; T2S, R2E,
Secrion 30 (Atlas #5136, 5236)
Description (incl. topo. position, land use, basis): Wetland WI-07 is situated on the Willamette River
floodplain tema,ce.at the bend in the river above Goat Island and the Clackamas River Confluence. Aerial
photos taken after the 1996 floods show massive scouring across this depositional poiunt bar, from
southeast to northwest, which created a lower wetland area adjacent to the river. [Wetland hydrology is
provided by overflow from the river during high water.] At the south end of the wetland are two scoured
depressions that are permanently flooded. Vegeta.tion at this site is dominated by reed canarygrass, with
a mixture of Pacific willow, black cottonwood, Oregon ash, spiraea, red osier dogwood, and stinging
nettle occuned near the ponds. The wetland boundary is marked by a change in topagraphy (edge of
flood scour) and a change in vegeta.tion to more xeric species (e.g., tansy, Scot's broom). Upland areas
are dominated by Douglas fir, western red cedar, cottonwood, Hima.layan blackberry and mowed turf
Soils: Riverwash, Newberg Fine, Sandy Loam
Source: surface flow
Vegetatian:
Trees Shrubs
Pacific willow (by pond)
Vines Herbs
reed canarygrass
etland Functions: Intact water quality and hydrologic control functions, sensitive to impacts, high
hancement potential, recreational use, pleasing aesthetics
Significant? � Yes ❑ No Remarks: Intact WQ and HC functions, within 1/4 mile of WQ litruted
stream, connected to salmonid stream
Potential Restoration Opportunities: Manage invasive exotic species
Appendix B
Wetland Assessments
jest Linn Goa15 Inventory
etland Assessment Summary Sheet
OFWAM Wildlife Fish
uestion Habitat Habitat
1 a c
2 b b
3 c c
4 c a
5 a c
6 a b
7 a
8 c
9 b
Descriutor some deQradec
1 Code: BE-01
t Class• PEM, PFO
: � on-site ❑ off-site
Water ydrologic Se
ualit Control to
a b
a a
a c
b b
a b
c a
a
intact deQraded p
Field date: 4/22/02
Investigators: TB, LW
Observation point: Willamette Falls Drive
itivity Enhancement Education
n act Potential
a a c
b a b
c a b
a c b
a b b
c b b
not
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used far acrive surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances. materials or wastes ner 141-086.
LSW Criteria. Wetiand is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intacY' hydrologic control function.
5. Wetland is less than '/< mile from a DEQ water yuality limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indi¢enous anadromous salmonids. and has "intacY' or "im�acted or degraded" fish habitat function.
1
�
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is publiclv owned and has "educational uses" and such use is documented for that site.
eation Aesthetic
Qualit
b b
c a
c b
b b
b b
b b
�nrial moderate
Yes I No
(West Linn Goa15 Inventory
�w etland Assessment Summary Sheet
�
2.
etland Code: BE-02
etland Class: PEM, PFO
ethod: � on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
Wildlife Fish
Habitat Habitat
a b
b b
c c
c a
a c
a b
a
c
b
some deeraded
Water ydrologic Se
ualit Control to
a b
a a
a c
b b
a b
c a
a
intact de�raded n
Field date: 4/22/02
Investigators: TB, LW
Observation point: Willamette Falls Drive
itivit Enhancement Education Recreation
n act Potential
a a c b
b a b c
c a b c
a c b b
a b b b
c b b b
not
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AI�ID is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated bv hazardous substances, materials or wastes ver 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the foilowing criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intact" hydrologic contro] function.
5. Wetland is less than'/< mile from a DEQ water quality limited water body (303 (d} list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communiries.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids. and has "intact" or "imnacted or de�raded" fish habitat function.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is oubliclv owned and has "educational uses" and such use is documented for that site.
Yes
Aesthetic
�
0
�
�
�
��
moderate
No
�est Linn Goa15 Inventory
etlancrt.Assessment Summary Sheet
Wetland Code: CA-01
Wetland Class: PEM, POW
Method: � on-site ❑ off-site
pFWAIVI Wildlife Fish
�uestion # Habitat Habit;
1 a n/a
2 a
3 b
4 b
5 a
6 b
7 a
8 a
9 a'
Descrintor diverse n/a
Water
c
a
a
b
c
c
Control
b
a
b
c
a
c
c
Field date: 4/4/02
Investigators: LW. AK, TB
Observation point: sw corner of wetland, end of trail
Sensitivity Enhanceme
to Im act Potential
a n/a
a
c
c
c
a
n/a
Education Recreation Aesthetic
Quali
a a b
a c b
a a a
a a a
a b a
b b a
educarional recreational moderate
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is arrificially created entirely from upiand AND is either:
a) created for the purpose of controlling, storing, or maintainixig stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) Iess than one acre in size and created unintenrionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, ctanberry producrion, fann or stock watering,
settiing of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances. materials or wastes ner 141-086.
LSW Criteria. Wetland is locall si �cant if it meets one or more of the fol
1. Wedand rovides "diverse" wildlife habitat.
2. Wetland ovides "intact" fish habitat.
3. Wetland rovides "intacY' water ualiry funcrion.
4. Wetland rovides "intact" h drolo 'c control function.
5. Wetland is less than'/a mile from a DEQ water quality limited water body
wetland's water uali function is described as "intact" or "im acted or d
6. Wetland contains one or more rare lant communities.
7. Wetland is inhabited by any species listed federally as threatened or endar
sensitive,.threatened or endan ered.
8. Wetland has a d'uect surface water connection to a stream segxnent mappe�
indiaenous anadromous salmonids, and has "intact" or "impacted or de¢ra
303 (d) list) and the
graded."
;ered, or state listed as
by ODFW as habitat for
ed" fish habitat function.
Optional LSW Criteria. Wetland is locaily significant if it meets one or more of the
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
2. Wetland is publiclv owned and has "educarional uses" and such use is documenti
criteria:
for that site.
1'��`►C!
�
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
OFWAM
1
2
3
4
5
6
7
8
9
1 Code: CA-02
1 Class: PSS
: � on-site ❑ off-site
Vildlife Fish Water ydrolog
[abitat Habitat Qualit C ontrol
b n/a c b
a a a
c a b
c c a
b c a
b c c
a a
a
a
some n/a lost intact
Field date: 4/11/02
Investigators: LW. AK
Observation point: east side trail
5ensitivi Enhancement Education
to Im act Potential
n/a b a
a b a
c n/a b
c b a
c a a
a b b
moderate
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or vortion thereof is contaminated bv hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intact" hydrologic control funcrion.
5. Wetland is less than 1 /4 mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communiries.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indi�enous anadromous saimonids. and has "intacY' or "im�acted ar de�raded" fish habitat funcrion.
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted ar degraded" hydrologic control.
2. Wetland is publicly owned a�d has "educational uses" and such use is documented for that site.
Aesthetic
��
��
��
L'!�
��
��
moderate
Yes I No
�
�est Linn Goa15 Inventory
etlandAssessment Summary Sheet
� Cade: CA-03P
i Class: PEM
: � on-site ❑ off-site
OFWAM IWildlifel Fish I Water
Field date: 4/1 I/02
Investigators: LW. AK, TB
Observation point: CNA trail
�stion Habitat Habitat Quali Control to Im act Potential
1 b n/a b b b b
2 c b b a c
3 c a c c n/a
4 c c a c c
5 b c c. c a
6 b c c b b
7 a a
8 a
9 a
:riptor some n/a de�raded degraded potential little
Education Recreation Aesthetic
Quali
a a c
a c a
b a a
a b a
a b a
b b a
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construcrion; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooIing indusa water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetiand is locall si i6cant if it meets one or more of the followin criteria:
1. Wetland rovides "diverse" wildlife habitat.
2. Wet3and rovides "intact" fish habitat.
3. Wetland rovides "intact" water uali function.
4. Wedand rovides "intacY' h drolo 'c control funcrion.
5. Wetland is less than'/< mile fzom a DEQ water quality limited water body (303 (d) list) and the
wetland's water uali function is described as "intact" or "' acted or de ed."
6. Wetland contains one or more rare lant communities.
7. Wetland is inhabited by any species listed federally as tbreatened or endangered, or state listed as
sensitive, threatened or endan ered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intact" or "imnacted or deeraded" fish habitat funcrion.
1
2.
onal LSW Criteria. Wetiand is locally significant if it meets one or more of
Wetland regresents a locatiy unique narive piant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or de�aded" water quality; or
d) "intacY' or "unpacted or degraded" hydrologic control.
Wetland is publicly owned and has "educarional uses" and such use is docum
for that site.
Yes I N
�
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: CA-04
CZass: PSS
� on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
I 1
2.
Vildlife Fish Water ydrolog
[abitat Habitat Quali Control
b n/a c b
a a a
c a c
c c a
b c a
b c c
a a
a
a
some n/a lost intact
Field date: 4/4/02
Iavestigators: TB, AK LW
Observation point: NE side of wetland
Sensitivit Enhancement Education
to Im �act Potential
n/a b a
a b a
c n/a b
c c a
c a a
a b b
moderate
Aesthetic
a c
c a
a a
b a
b a
b a
usions. Wetland is not locally significant if one of the following condirions applies:
Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining storxnwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d)less than one acre in size and created unintenrionally fi irrigarion or constracrion; or
e) created for the purpose of wastewater treatment, cranberry production, fann or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish liabitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intacY' hydrologic control funcrion.
5. Wetland is less than'/a mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality futtction is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant comtnuniries.
7. Wetland is inhabited by any species listed federal2y as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indisenous anadromous salmonids, and has "intact" or "imnacted or deeraded" fish habitat function..
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
2. Wetland is publiclv owned and has "educarional uses" and such use is documented for that site.
/
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
etland Code: CA-OS
etland Class: PSS
ethod: � on-site ❑ off=site
OFWAM
1
2
3
4
5
6
7
8
9
Vildlife Fish Water ydrolog
[abitat Habitat Quali Control
b n/a c b
a a a
c a c
c c a
b c a
b c c
a a
a
a
some n/a lost intact
Field date: 414/02
Investigators: TB, AK
Observation point: SW side of wetland
�ensitivit Enhancement Education
to Im act Potential
n/a b a
a b a
c n/a b
c c a
c a a
a b b
moderate
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. WetIand is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construction; or •
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a goIf course hazard.
2. Wetland or vortion thereof is contaminated bv hazardous substances, materials or wastes ver 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intacY' hydrologic control function.
5. Wetland is less than '/< mile from a DEQ water quality limited water body (303 {d) list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indigenons anadromous salmonids, and has "intacY' or "imaacted or deQraded" fish habitat function.
1
`�
onal LSW Criteria. Wetland is locally significant if it meets one or more of the follo�
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is nubliclv owned and has "educational uses" and such use is documented for
criteria:
srte.
Aesthetic
a c
c a
a a
b a
b a
b a
Yes � No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
Code: CA-06
Class• PEM
� on-site ❑ off-site
OFWAM
�
�
3
0
�
�
�
0
E
Field date: 4/11/02
Investigators: TB. AK
Observation point: data plot
Control to Im
b a
a a
c c
c c
b a
c b
a
Enhancement Edncation
:t Potential
a b
a a
a b
c a
a c
b a
not
Aesthetic
��
��
��
��
��
��
Exclusions. Wetland is not locall si ificant if one of the following conditions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than otte acre in size and created unintentionally from irrigation or consttuction; or
e) created for the purpose of wastewater treaiment, cranberry production, fazm or stock watering,
settlin of sediment, cooiin industrial water, or as a olf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
L5W Criteria. Wetland is locall si ificant if it meets one or more of
1. Wetland rovides "diverse" wildlife habitat.
2. Wetland rovides "intact" fish habitat.
8.
1.
2.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intact" hydrologic control function. •
5. Wetland is less than'/n mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
Wetland contains one or more rare plant communiries.
Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
inc3igenous anadromous salmonids, and has "intacY' or "impacted or degraded" fish habitat function.
onal LSW Criteria. Wetland is locally significant if it meets one or more of
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Watland is nubliclv owned and has "educarional uses" and such use is docum
b
b
c
c
a
b
a
a
a
some
Fish
Habitat
b
a
c
a
a
c
Water
a
a
a
b
c
c
criteria:
that site.
No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
etland Code: CS-01
etland Class: PEM
ethod: � on-site ❑ off-site
OFWAM
Water
Fish
�stion Habitat Habitat Qualit Control
1 a b a b_
2 b a a a
3 c c b c
4 c a b c
5 a c a b
6 a c c a
7 a a
8 c
9 a
:riptor some de�raded deQraded de�raded
Field date: 4/22/02
Tnvestigators: TB, LW
Observation point: data lot
�ensitivit Enhancement Education
to Impact Potential
a a c
b a b
c a b
a c c
a a c
c b b
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds,
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazazd.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat. '
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intacY' hydrologic control function.
5. Wetland is less than'/o mi]e from a DEQ water quatity limited water body (303 (d) list) and the
wetland's water quality funcrion is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as thxeatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a d'uect surface water connection to a stream segment mapped by ODFW as habitat for
indiQenous anadromous saimonids, and has "intact" or "imnacted or degraded" fish habitat function.
0
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic controt.
Wetland is pubiicly owned and has "educational uses" and such use is documented for that site.
Aesthetic
��
��
��
��
��
moderate
Yes I No
Test Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: FE-01
Class: PEM
� on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
Field date: 4/18/02
Investigators: TB. LW
Observation point: east side of wetland
Vildlife Fish Water ydrologic Sensil
[abitat Habitat uali Control to Im
a c c b a
c a c c b
c c c c c
c a b c a
a c a c a
a c c c b
a a
c
b
some degraded lost lost noter
Education
Potential
b c
b a
n/a b
c c
b c
b b
moderate
Recreation Aesthetic
Quali
c c
c a
c a
b b
b a
b a
not avprou. moderate
Exclusions. Wetland is not locally significant if one of the following condirions applies:
1. Wetland is artificialiy created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrianally from irrigation or construcrion; or
e) cteated for the purpose of wastewater treatment, cranbenry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazazd.
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes ver 141-(
LSW Criteria.
1. Wetland p
6.
7.
8.
ia is ioca�ry sigmncant ir u meets one or more
"diverse" wildlife habitat.
"intact" fish habitat.
"intact" water Qualitv function.
Wetland provides "intact" hydrologic control function.
Wetland is less than'/4 mile from a DEQ water quality Innited wafer body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
Wetland contains one or more rare plant communities.
Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
Wedand has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indi�enous anadromous salmonids, and has "intact" or "imAacted or deQraded'' fish habitat funcrion.
Optional LSW Criteria. Wefland is locally significant if it meets one or more of the following crit�
1. Wetland represents a Iocally unique native plant comrnunity AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
2. Wetland is nubliclv owned and has "educational uses" and such use is documented for that site.
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
etland Code: FE-02
etland Class: PEM, PSS
ethod: � on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
Wildlife Fish Water ydrotogic Se
Habitat Habitat Quali Control to
a a a b
a a a a
b b a c
c a b c
a a c a
a a c c
a a
a
a
diverse intact desraded deeraded n
Field date: 4/18/02, 6/6/02
Investigators: TB, AK
Observation point: west side of wetland
itivit Enhancement Education
n act Potential
a n/a a
b b
c a
c a
a b
a b
n/a
Aesthetic
b b
b c
b a
a a
b a
b a
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connection to natural watexs of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materiats or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intact" hydrologic control function.
5. Wetland is less than 1 /4 mile £rom a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intacY' ar"impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intacY' or "imnacted or de�raded" fish habitat function.
1
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species' ;
b} "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for that site.
moderate
Yes I N
A
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
Code: FR-01
Class: PEM
� on-site ❑ off-site
OFWAM Wildlife
Question Habitat
#
1 b
2 b
3 c
4 c
5 a
6 a
7 a
8 a
9 a
Descrintor some
Field date: 3/20/02
Investigators: LW, AK, TB
Observation point: at data plots
Fish Water HydroIogic Sensitivity Enhancement Education
abitat Quality Control to Impact Potential
c a
a a
b a
a b
a c
a c
intact
L��7
��
��
��
��
��
��
not
Exclusions. Wetland is not locally si ificant if one of the followin conditions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, fann or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes ner 141-C
�
�
�
�
�
�
�
❑�
�
/ Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland provides "diverse" wildlife habitat.
Wetland provides "intact" fish habitat.
Wetland nrovides "intacY' water aualitv fimction.
Wetland provides "intacY' hydrologic control function.
Wetland is less than'/a mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
Wetland contains one or more rare plant communiries.
Wefland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat ]
indigenous anadromons salmonids, and has "intact" ar"impacted or degraded" fish habitat funcri
onal LSW Criteria. Wetland is locally sig�ificant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded".water quality; or
d) "intacY' or "impacted or degra@ed" hydrologic control.
Wetland is nublicly owned and has "educarional uses" and such use is documented for that site.
��
��
��
��
��
���
Aesthetic
Quality
��
��
��
��
L'��
L���
Yes
Test Linn Goal 5 Inventory
etland Assessment Summary Sheet
We�land Code: FR-02
Wetland Class: PEM
Method: � on-site ❑ off-site
OTWAM Wildlife Fish Water
Question Habitat Habitat Quality
#
1 a b a
2 b a a
3 b c a
4 c a c
5 a c a
6 b c c
7 a
S c
9 a
Descrintor some degraded desrailec
Field date: 3/21/02
Investigators: LW. TB
Observation point: at c
ydrologic Sensitivity Enhancement Education
Control to Impact Potential
��
��
��
��
��
��
��
��
��
��
•��l�
��
��
intact
Exclusions. Wetland is not locall significant if one of the followin conditions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and o.pen connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigarion or construcrion; or
e) created for the purpose of wastewater treatment, crauberry production, farm or stock watering,
settlin of sediment, coolin industriat water, or as a olf course hazard.
2. Wetland or portion thereof is contanvnated by hazardous substances, materials or wastes per 141-C
, _ .. �w _ ,._.. __. , .:. .. _
LSW Criteria. Wetland is locall si i$cant if it meets one or more of the followin criteria:
1. Wetland rovides "diverse" wildiife habitat.
2. Wetland rovides "intact" fish habitat.
3. Wetland rovides "intact" water uali function.
4. Wetland rovides "intact" h drolo 'c control function.
5. Wetland is less than '/a mile from a DEQ water quality limited water body (303 (c3) list) and the
wetland's water uality funcrion is described as "intacY' or "impacted or de aded."
6. Wetland contains one or more rare lant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endan ered.
8. Wefland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intacY' or "imnacted or de�raded" fish habitat function.
Optional LSW Criteria. Wetland is locally significant if it meets one ox more of the following crit�
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intacY' or "irnpacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control:
2. Wetland is vublicly owned and has "educational uses" and such use is documented for that site.
Aesthetic
Quality
��.
��
��
��
��
��
Yes I No
�est Linn Goal 5 Inventory
etland Assessment 5ummary Sheet
coa�: �R-a3
Class: PFO
� on-site ❑ off-site
OFWAM Wildlife Fish Water
Question Habitat Habitat Qnality
#
1 b a a
2 a a a
3 c c a
4 c a c
5 a c a
6 b c c
7 a
8 c
9 a
Describtor some deQraded degradec
Field date: 3/21/02
Investigators: LW, TB
Observation point: JoY
ydrologic Sensitivity Enhancement Education Recreation Aesthetic
Control to Impact Potential Quality
�'�
��
��
��
��
��
���
not approp. � not approp. � moderate
Exclusions. Wettand is not locally significant if one of the foliowing conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the pucpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigarion or construction; ar
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contanunated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
i. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intact" water quality funcrion.
4. Wetland provides "intacY' hydrologic control funcfion.
5. Wetland is less than'/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's wa.ter quatity funcrion is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a streazn segment mapped by ODFVV as habitat for
indiQenous anadromous salmonids, and has "intacY' or "impacted or degraded" fish habitat function.
Optional LSW Criteria. Wetiand is Iocaliy significant if it meets one or more of the
1. Wetland represents a locally unique native plant community A�1D provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacP' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
2. Wetland is publicly owned and has "educational uses" and such use is documentE
�OS�sy
�■a■eo�
��'Q�
�00�
�a���
�00�
criteria:
for that site.
es � No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
Code: FR-04
CIass: PEM
� on-site ❑ off-site
OFWAM Wildlife Fish 'Water
Question Habitat Habitat Quality
#
1 b c c
2 b b a
3 c c a
4 c a b
5 a c a
6 a a c
7 a
S c
9 a
Descrintor some de�raded dearaded
Education
�0�
�a��
�0�
�0�
�a�
�0�
�-�
_-�
--�
� ��-��. ..� �. �.
Field date: 4/3/02
Investigators: LW. TB
Observation point: at da
Control � to Impact � Potential
��
��
��
��
��
��
��
intact
Exclusions. Wetland is not locall si ificant if one of the following conditions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes ner 141-o
LSW Criteria. Wetland is locally significant if it meets one or more of t
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intacY' hydrologic control funcrion.
5. Wetland is less than I/< mile from a DEQ water quality limited water
wetland's water quality function is described as "intact" or "impacte
6. Wetland contains one or more rare plant communiries.
7. Wetland is inhabited by any species listed federally as threatened or
sensirive, threatened or endangered.
8. Wetland has a direct surFace water connection to a stream segment n
indieenous anadromous salmonids, and has "intact" or "imnacted or
1
2.
criteria:
ody (303 (d) list) and the
or deeraded."
or state listed as
by ODFW as habitat for
ed" fish habitat function.
onal LSW Criteria. Wefland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted oz degraded" hydrologic control.
Wetland is oublicly owned and has "educarional uses" and such use is documented for that site.
�eation Aesthetic
Quality
c c
c c
c a
b b
b a
b b
pnron. not nleasin�
Yes I No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
i Code: HI-01
i Class: PSS
: � on-site ❑ off-site
OFWAM
0
�
3
�
�
3
�
3
.7
�ildlife Fish Water ydrologic Se.
[abitat Habitat uality Control to
b n/a c b
a c c
c a c
c c c
c a a
b c a
a a
�
a
some n/a lost deQraded n�
Field date: 4/2/02
Investigators: TB, LW
Observation point: data nlot #2
itivit . Enhancement Education
�n act Potential
a b a
b b a
c n/a b
a c a
a a a
a b a
moderate
Exclusions. Wetland is not locall si ificant if one of the followin condirions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface xnining or active log ponds;
c) a ditch without free and open connecrion to naturat waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigarion or construction; ar
e) created for the purpose of wastewater treatcnent, cranberry production, farm or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intact" water quality funcrion.
4. Wetland provides "intact" hydrologic confrol function.
5. Wetland is less than %< mile from a DEQ water quality limited water body (303 (d) list) aad the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communiries.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
seusitive, threatened or endangered.
8. Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indi¢enous anadromous salmonids, and has "intacY' or "irnnacted or de¢raded" fish habitat function.
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland represents a localIy unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intacY' or "impacted oz degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologia control.
Aesthetic
a c
c b
a a
b a
b a
b a
moderate
Yes i No
2. Wetland is nubliclv owned and has "educational uses" and such use is documented for that site.
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
Code: RO-01
Class• PEM, PFO
� on-site ❑ off-site
OFWAM Wildlife Fish
Question Habitat Habitat
1 a a
2 a a
3 b c
4 c a
5 a c
6 a c
7 a
8 c
9 a
Descriptor some deQraded
Water ydrolog
�uali Control
a b
a a
a c
b c
a a
c a
a
e�raded intact
Field date: 4/23/02
Investigators: TB. LW
Observation point: data plot
�ensitivi Enhancement Education Recreation Aesthetic
to Im act Potential Quali
a a a b b
b a a b b
c a b b a
a c a b a
a a b b a
a b b b a
botential hi�h educational potential moderate
Exclusions. Wetland is not locally significant if one of the following condirions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigarion or construcrion; or
e) created for the purpose of wastewater treatment, cranbezry production, fann or stock watering,
settiing of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Critenia. Wetland is locatly significant if it meets ane or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacP' fish habitat.
3. WeYland provides "intacY' water quality funcrion.
4. Wetland provides "intact" hydrologic control function.
5. Wetland is less than'/. mile from a DEQ water quaiity limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare piant communiries.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indigenons anadromous salmonids, and has "intacY' or "impacted or degraded" fish habitat function.
1
2.
onal LSW Criteria. Wetland is Iocally significant if it meets one or more of the folIowing critE
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for that site.
!!
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: TA-01
Class• PEM
� on-site ❑ off-site
OFWAM Wildlife Fish
Question Habitat Habitat
1 c c
2 b b
3 c c
4 c a
5 a c
6 a c
7 a
8 c
9 c
Descriutor some deQraded
Water ydrologic Se
Quality Control to
a b
a a
a c
b a
a b
c a
a
.e�raded intact p
Field date: 4/2/02
Investigators: TB. LW
Observation point: data �lot
itivit Enhancement Education
n act Potential
a a b
b a b
c a b
a c b
a c a
c b a
moderate
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation ox construction; or
e) created for the purpose of wastewater treatment, cranberry production, fann or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazazd.
2. Wetland or portion thereof is contaxninated bv hazazdous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locatly signifcant if it
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetlanc! provides "intact" water quality funci
criteria:
4. Wetland provides "intact" hydrologic control function.
5. Wetland is less than I/ mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality funcrion is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wet2and is iuiiabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened oz endangered.
8. Wetland has a d'uect surFace water connection to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, and has "intact" or "impacted or degraded" fish habitat fizncrion..
1
2.
onal LSW Criteria. Wefiand is locatly significant if it meets one or more o
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educarional uses" and such use is docm
criteria:
for that site.
c
b
b
b
b
Aesthetic
L�
0
�
0
�
0
moderate
No
Test Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: TA-02
Class• PSS, PFO
❑ on-site � off-site
OFWAM
Water
Fish
�stion Habitat Habitat Qualit Control
1 b b c b
2 a a a a
3 b b c b
4 c a b b
5 a a c a
6 a c c a
7 a a
8 a
9 a
;rintor diverse intact lost intact
Field date: 4/03/02
Investigators: TB, LW
Observation point: Oid Palmer Rd.
to
itivi Enhancement Education
n act Potential
a a c
b b a
c a b
c b a
a a a
a b a
Aesthetic
��
��
��
��
��
��
Exclusions. Wetland is not locally significant if one of the following conditions applies:
i. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construcrion; or
e) created for the purpose of wastewater treatment, cranberry producrion, fann or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances. materials or wastes ner I41-086.
LSW Criteria. Wetland is locall si ificant if it meets one or more of the followin criteria:
1. Wetland rovides "diverse" wildlife habitat.
2. Wetland rovides "intact" fish habitat.
3. Wetland rovides "intacY' water uality function.
4. Wetland rovides "intacY' h drolo 'c control function.
5. Wetland is less than'/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water uality funcrion is described as "intacY' or "im acted or degraded."
6. Wetland contains one or more rare lant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids. and has "intact" or "imnacted or deeraded" fish habitat function.
1
�
onal T,SW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for that site.
Yes I No
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
i Code: TA-03
l Class• PSS
: � on-site ❑ off-site
Field date: 4/18/02
Investigators: TB, LW
Observatiou point: trail
OFWAM IR'itdlife� Fish I Water
0
�
�
�
�7
�
�
�
�
c b
a b
c c
c a
a c
a b
a
c
a
some de�ra
�
�
�
0
0
�a
'� ' m
0�
is�
s�
s■
��
ss■
s��
intact
itivi Enhancement Education
n act Potential
a a a
b a a
c a n/a
a c a
a a a
a b a
Exclusions. Wetland is not locall si 'ficant if one of the followin conditions a lies:
1. Wedand is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, sYoring, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
' c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazard.
2. Wetland or portion thereof is contaminated bv hazardous substances, materials or wastes ner 141-C
1.
�
LSW Criteria. Wetland is Iocally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wiidlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intacY' water quality funcrion.
4. Wetland provides "intacY' hydrologic control funcrion.
5. Wetland is less than '/a mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contaix►s one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened ar endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, and has "intacY' or "impacted or degraded" fish habitat futtction.
onal LSW Criteria. Wetland is locaily signif cant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for that site.
�eation Aesthetic
Quali
a c
c a
a a
b b
b a
b b
ational moderate
Yes No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
etland Code: TA-04
etland Class: PSS
ethod: � on-site ❑ off-site
OFR'AM
1
2
3
4
5
6
7
8
9
�ildlife Fish Water ydrologic Se
[abitat Habitat uali Control to
c a a b
a b b b
c a a c
c a b b
a c a a
a b c a
a a
c
a
some intact deeraded desraded v�
Field date: 4/23/02
Investigators: TB, AK
Observation point: Imperial Dr.
itivi Enhancement Education Recreation
n act Potential
a a c b
b a b c�
c a a c
a c b b
a a b b
a b b b
not
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intact" water quatity function.
4. Wetland provides "intact" hydrologic control function.
5. Wetland is less than '/< mile from a DEQ water quality limited water body (303 (d) Iist) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids. and has "intacY' or "imnacted or de�aded" fish habitat funcrion.
�
►:a
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wettand represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetiand is publicly owned and has "educational uses" and such use is documented for that site.
Yes
Aesthetic
0
�
0
�
�
l��
moderate
No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
1 Code: TA-OS
� Class: POW, PEM, PFO
: [] on-site � off-site
OFWAM IWildlife� Fish � Water
0
�
3
�
0
0
�
0
�
a b
a b
a b
c a
a a
a b
a
a
a
diverse de�ra
�3
0
0
L�'
0
e
" ' m
0�
s�
0�
s�
S�
iss�
�;�■
intact
n/a inot
Exclusions. Wetland is not locally significant if one of the following condirions applies:
l. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive swrface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigarion or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, ox as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes tier 141-086.
LSW Criteria. Wetland is locally significant if it rneets one or more of the following criteria:
l. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intact" hydrologic control funcrion.
5. Wetland is less than'/ mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intact" or "imnacTed or de�raded" fish habitat futtcrion.
�
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criti
Wetland represents a locally nnique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is uublicly owned and has "educarional uses" and such use is documented for that site.
Field date: 5/16/02
Investigators: TB, AK
Observation point: Beacon Hill Lane
itivi Enhancement Education
n act Potential
a n/a c
b b
c a
c b
a b
a b
eation Aesthetic
Quali
b c
c c
c c
a b
b b
b b
�ntial not leasin3
Yes No
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
OFWAM
Question
1
2
3
4
5
6
7
8
9
1 Code: TA-06
t Glass• PEM
: 0 on-site � off-site
b
c
c
c
b
b
a
a
a
some
FieId date: 5/16/02
Investigators• TB
Observation point: new road to west
Fish Water ydrologic Sensif
Habitat ualit Control to Im
n/a c b a
c c a
a c c
c a c
c c a
c c b
a
n/a lost lost votex
Education
Potentiat
b c
b a
n/a b
c b
a c
b b
moderate
Recreation Aesthetic
Quali
c c
c c
c a
b a
b b
b a
not apt�rop. not pleasin�
Exclusions. Wetland is not locally si ificant if one of the following conditions a lies:
1. Wetlanc3 is arrificially cxeated entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and cteated unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settlin of sediment, coolin industdal water, or as a olf course hazard.
2. Wetland or portion thereof is contaminated bv hazardous substances, materials or wastes ner 141-C
, LSW Criteria. Wetland is locall si ' cant iF it meets one or more of the followin criteria:
1. Wetland rovides "diverse" wildlife habitat.
2. Wetland rovides "intact" fish habitat.
3. Wetland rovides "intact" water uality function.
4. Wetland rovides "intacY' h drolo 'c contzol funcrion.
5. Wetland is less than'/a mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water uality function is described as "intacY' or "im acted or de aded."
6. Wetland contains one or more rare lant communities.
7. Wetland is inhabited by any species Iisted federally as threatened or endangered, or state listed as
sensitive, threatened or endan ered.
8. Wetland has a d'uect surface water connecriun to a stream segment mapped by ODFW as habitat for
indi enous anadromous salxnonids, and has "intact" or "im acted or de ed" fish habitat function.
O tional LSW Criteria. Wetiand is locall si� ificant if it meets one or more of the followin criteria:
l. Wetland represents a locally unique native plant community AND provides:
a} "diverse habitat" or "habitat for some wildiife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted ox degraded" water quality; or
d"intacY' or "im acted or de aded" h drolo 'c control.
2. Wetland is Uubiicly owned and has "educational uses" and such use is documented for that site.
!!
jest Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: TA-07
Class• PFO
❑ on-site � off-site
OFWAM Wildlife Fish
Questi Habitat Habitat
1 b n/a
2 a
3 c
4 c
5 b
6 b
7 a
8 a
9 a
Descriptor some n/a
Field date: 5/16/02
Investigators: TB
Observation point: new road to west
�
� }� � x � � ���
� �:� ara a'' � �'� �aa � �v'r�: *
v� ,� � '� < a .�:' � � �,�� ` �
a
�
,- � � a
. .,:_> , ._. � �� rl� .^���,� �'. �='`,,,? , , . � ��'� , �„
ydrologic Sensitivi Enhancement Education Recreation Aesthetic
Control to Im act Potential Quali
b a a c c c
b a c a c c
b c n/a b c a
a c b b b a
c a a c b b
c a b b b a
a
ieQraded potential hi�h not aUUrop. not aUproU. not pleasin
Water
c
b
a
b
c
c
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connectian to natural waters of the state and,no food or game fish;
d) less than one acre in size and created nnintentionally from irrigation or conshuction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes ner 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
l. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat. .
3. Wetland provides "intacY' water quality funcrion.
4. Wetland provides "intacP' hydrologic control function.
5. Wetland is less than'/4 mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quatity function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communiries.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, and has "intacY' or "impacted or degraded" fish habitat funcrion.
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intact" or "impacted ar degraded" fish habitat;
c) "infact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
2. Wetland is publicly owned and has "educational uses" and such use is documented for that site.
Yes I No
0
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: TA-08
Class: PFO
� on site ❑ off-site
OFWAM
0
0
�
0
�
0
�
0
�
1
2.
b
a
b
c
a
a
a
c
a
some
Fislt
Habitat
b
b
b
a
c
b
Water
c
a
a
b
a
c
'� ' m
0�
s�
S�
��
��
s�
��■
Field date: 5/16/02
Investigators• TB
Observation point: new road to east
�itivi Enhancement Education Recreation Aesthetic
n act Potential Quali
a a c b c
b a b c b
c a b c b
a c b b b
a a b b a
a b b b a
not
usions. Wedand is not locally significant if one of the following conditions applies:
Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c} a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentional2y from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
Wefland or roortion thereof is contaminated bv hazardous substances, materials or wastes per 141-086.
LSW Criteri
1. Wetland
2. Wetland
3. Wetland
id is locally significant if i
"diverse" wildlife habitat.
"intact" water
one or more of the following criteria:
4. Wetland provides "intacY' hydrologic control function.
5. Wetland is less than.'/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality funcrion is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant comrnunities.
7. Wetland is inhabited by any species listed federally as tbreatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, attd has "intact" or "impacted or degraded" fish habitat funcrion.
1
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the follo�
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is uublicly owned and has "educational uses" and such use is docuxnented for
criteria:
site.
moderate
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: TA-09
Class• PSS. PFO
� on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
Vildlife Fish Water ydrologic Se:
[abitat Habitat Quali Control to
a a c b
a b a a
a b a b
c a b a
a c a a
a b c a
a a
c
a
some degraded deQraded intact p�
Field date: 5/Z/02
Investigators: TB, AK
Observation point: Tanner Czeek Ln.
itivit Enhancement Education
n act Potential
a a c
b a a
c a b
b b b
b a b
b b b
Aesthetic
��
��
��
��
��
��
moderate
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, stoxing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to naturai waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigarion or conshuction; or
e) created for the purpose of wastewater treatment, cranbenry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland ar vortion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
�
0
0
0
�
0
�
�
C
�
Wetland is locallv si�nificant if it meets one or more of the followine criteria:
Wetland provides "diverse" wildlife habitat.
Wetland provides "intact" fish habitat.
Wetlaad provides "intacY' water quality function.
Wetland provides "intact" hydrologic control funcrion.
Wetland is less than '/< mile from a DEQ water quality limited watex body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
Wetland contains one or more rare plant communities.
Wetland is inhabited by any species listed federaliy as threatened or endangered, or state listed as
sensirive, threatened or endangered.
Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat 1
indiQenous anadromous salmonids, and has "intact" or "impacted or degraded" fish habitat funcri
onal LSW Criteria. Wetland is locally significant if it meets one or more of the
Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat
c) "intacY' or "impacted or degraded" water quality; or
d) "inTacY' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educarional uses" and such use is document
criteria:
that site.
o K � ! '�
�, ,U,1 N'r�
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
etland Code• TR-01
etland Class: PFO. PEM
ethod: � on-site ❑ off-site
OFWAM
�
0
0
�
�
C
�
�
E
iVVildlife Fish Water
Habitat Habitat uali
a a c
a a a
b b a
c a b
a a c
a c c
a
a
a
diverse intact degrade�
Field date: 4-23-02
Investigators: TB, LW
Observation point: west edge of wetland
Control to Im
b b
a b
b c
c c
a b
c a
a
Potential
n/a
Education
Aesthetic
���
�a�
���
�a��
�0�
�0�
not
Exclusions. Wetland is not locally si ificant if one of the followin condirions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazard..
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes ner 141-086.
LSW Criteria. Wetland is locall si 'ficant if it meets one or more of the followin criteria:
1. Wetland rovides "diverse" wildlife habitat.
3:� Wetland rovides "intacY' fish habitat.
3. Wedand rovides "zntact" water uali funcrion.
4. Wetland rovides "intacY' h drolo 'c coatrol function.
5. Wetland is less than'/< mile from a DEQ water quality lunited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indi enous anadromous salmonids, and has "intact" or "' acted or de ed'' ftsh habitat function,
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
2. Wetland is uubliclv owned and has "educarional uses" and such use is documented for that site.
Yes
moderate
Test Linn Goal 5 Inventory
etlaad Assessment Summary Sheet
1
2.
Code: TR-02
Class• PSS, PFO
� on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
VVildIife Fish
Habitat Habitat
a a
a a
b c
c a
a a
a c
a
a
a
diverse degraded
Water
c
a
a
b
c
c
'� ' m
0�
��
��
s�
sss�
s�
■��
Field date: 4/23/02
Investigators: TB. LW
Observation point: west end of wetland
�itivity Enhancement Education
n act Potential
b n/a b
b b
c a
c b
b c
a b
n/a
Recreation Aesthetic
Quali
c b
c c
c a
a a
b a
b a
not approp. moderate
usions. Wetland is not locally significant if one of the following conditions applies:
Wetland is artificially cieated entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free aud open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigarion or construction; or
e) craated for the purpose of wastewater treatment, cranberry producrion, fann or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
Wetland or p.ortion thereof is contaminated bv hazardous substances, materials or wastes ner 141-086.
LSW Criteria. Wetland is locall si ificant if it meets one or more of the followin criteria:
1. Wetland rovides "diverse" wildlife habitat.
2. Wetland rovides "intact" fish habitat.
3. Wetland rovides "intacY' water uali function.
4. Wetland rovides "intact" h drolo 'c control function.
5. Watland is less than i/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water uali function is described as "intact" or "im acted or de ded."
6. Wetland contains one or more rare lant communities.
7. Wetland zs inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, ttireatened or endan ered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indi�enous anadromous salmotuds, and has "intact" or "imnacted or degraded" fish habitat function.
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
2. Wetland is pubiicly owned and has "educational uses" and such use is documented for that site.
Yes I No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
OFWAM
1
2
3
4
5
6
7
8
9
Code• TR-03
Class: PEM, PSS, PFO
� on-site ❑ off-site
Vildlife Fish Water
[abitat Habitat Quali
a a a
a a a
a a a
c a b
a c a
a a c
a
c
a
some intact degrade�
Field date: 4/23/02
Investigators: TB, LW
Observation point: data plot #1
Control to Im
b a
a b
b c
c a
a a
a a
a
intact
Education
Potential
a c
a a
a a
b c
a c
b b
�
�
�
�
�
�
�
�
�
�• ,►
Exclusions. Wetland is notlocall si 'ficant if one of the followin conditions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unitttentionally from irrigatian ar construction; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or sYock watering,
settlin of sediment, coolin industrial water, or as a olf course hazazd.
2. Wetland or rtion thereof is contaminated b hazardous substances, materials or wastes er 141-086.
. LSW Criteria. Wetland is Iocally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fsh habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intact" hydrologic control function. .
5. Wetland is less than'/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intacY' or "imnacted or de2raded" fish habitat funcrion.
Optional LSW Criteria. Wetland is locally significant if it meets one or more of
1. Wetland represents a Iocally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species"; �
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
2. Wetland is publicly owned and has "educational uses" and such use is docum
for
criteria:
Aesthetic
�
�
�
�
�
�
moderate
Yes I No
�est Linm Goal 5 Inventory
etland Assessment Summary Sheet
OFWAM
i
2
3
4
5
6
7
S
9
i Code: TR-04
I Ctass• PSS
: � on-site ❑ off-site
b
a
C
c
a
a
a
c
a
some
Fish Water ydrologic Se
Habitat Quali Control to
a a b
a a a
b a b
a b c
c a a
a c a
a
intact Ide�radedl intact
Field date: 4/18/02
Investigators: TB, AK
Observation point: dataplot #1
itivi Enhancement Education
n act Potential
a a c
b a b
c a a
a b c
a a c
a b b
not
' ��', '�� �,y� �fi �' t il�t �p, °�;;
Recreation Aesthetic
uali
c c
c a
c a
b c
b a
b a
not aupron. not nleasin;
Exclusions. Wetland is not locall si ificant if one of the followin condirions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connection to nahxral waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigarion or construction; or
e) created for the purpose of wastewater treatment, cranberry production, fann or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
, � LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland nrovides "diverse" wildtife habitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intact" hydrologic control ftmction.
5. Wetiand is less than '/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indi�enous anadromous salmonids, and has "intact" or "impacted or deQraded" fish habitat funcrion.
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria: _.
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wiidlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "zmpacted or degraded" hydrologic control.
2. Wetland is publicly owned and has "educational uses" and such use is documented for that site.
Yes I No
�
/ y/J
c
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
Code: TU-01
Class: PEM
� on-site ❑ off-site
OFWAIVI
1
2
3
4
5
6
7
8
4
Vildlife Fish Water ydrologic Se
[abitat Habitat Qualit Control to
b c b a
b a a a
c c a b
e c b b
a a c b
a a c c
c a
a
a
some degraded degraded degraded p
Field date: 3/20/02
Investigators: TS, LW. AK
Observation point: SW comer of west pond
itivi Enhancement Education
n act Potential
b a a
a c a
a n/a b
c b a
a a a
c b b
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely &om upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contanunated by hazazdous substances, materials or wastes per 141-086.
is locallv siQnificant if it meets one or mote
6.
7.
8.
1
2.
Wetland provides "intact" fish habitat.
Wetland provides "intacY' water quality fimcrion.
Wetland provides "intact" hydrologic control function.
Wefland is less than'/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality funcrion is described as "intacY' or "impacted or degraded."
Wetland contains one or more rare plant communities.
Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered
Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intact" or "imnacted or de�raded" fish habitat function.
onal LSW Criteria. WetIand is locally significant if it meets one or more of the follo�
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b} "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is uubliclv owned and has "educational uses" and such use is documented for
criteria:
srte.
Aesthetic
a c
a a
a a
b a
a a
b a
moderate
l���
✓
o�
�
� �* �7�
r,,�r°"'� , �_:�..
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
etland Code: TU-02
etland Class: PEM
ethod: � on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
i'ildlife Fish Water Hydrologic Se
[abitat Habitat Qualit Control to
c n/a b a
c a a
c a c
c c a
b c c
b c c
c a
a
c
some n/a de�raded intact p
Field date: 3/20/02
Investigators: TB, LW, AK
Observation point: data lot
itivit Enhancement Education
n act Potential
a a a
a c a
a n/a b
c c a
c c a
b b a
moderate
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining storxnwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construcrion; or
e) created for the purpose of wastewater treatment, cranberry producrion, fatm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated bv hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intact" hydrologic contro] function.
5. Wetland is less than '/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. . Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intact" or "imoacted or de¢raded" fish habitat funcrion.
1
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacP' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is publiclv owned and has "educational uses" and such use is documented for that site.
Aesthetic
��
��
��
��
��
��
moderate
Yes I No
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
etland Code: TCT-03
etland Class: PFO
ethod: � on-site ❑ off-site
! �►.'l_�u I
1
2
3
4
5
6
7
8
9
Vildlife Fish Water ydrologic Se
[abitat Habitat Qualit Control to
b c a a
a a a a
c b a b
c c b b
a a c a
a a c c
c a
a
a
some degraded de�raded intact p�
Field date: 3/20/02
Investigators: TB, LW. AK
Observation point: north bank overlooldng slou�h
itivi Enhancement Education
n act Potential
b a a
a a b
a b b
c b a
c a a
a b a
reation Aesthetic
Quali
a c
a � c
b b
b a
n1a b
a a
�ational not pleasin;
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substattces, materials or wastes ner 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intact" hydrologic control function.
5. Wetland is less than'/< miie from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant cormnunities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, and has "intact" or "imnacted or de�.*raded" fish habitat function.
1
�
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitax for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for that site.
Yes I No
biL �t}""�'�'f
1�� ,;� P "`
Test Linn Goa15 Inventory
etland Assessment Summary Sheet
OFWAM
1
2
3
4
5
6
7
8
9
t Code: TCT-04
i Class: PEM
: � on-site ❑ off-site
�ildlife Fish Water ydrologic Se
[abitat Habitat uality Control to
c c b a
c b a a
c c a c
c c b b
a a c c
a a c c
c a
a
c
some de�raded deeraded de�raded u
Field date: 3/20/02
Investigators: TB. LW, AK
Observation point: data plot
itivity Enhancement Education
n act Potential
b a a
a c a
a n/a b
c c a
a c b
b b a
moderate leducational
Aesthetic
b c
a a
a b
b b
a a
a b
Exclusions. Wedand is not locally significant if one of the following conditions applies:
i. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater,
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigarion or construcrion; or
e) created for the purpose of wastewater treatment, cranberry production, fann or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intact" hydrologic control funcrion.
5. Wetland is less than'/< mile from a DEQ water quality limited water body (303 (d} list) and the
wetland's water quality function is descnbed as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communiries.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indi�enous anadromous salmonids, and has "intact" or "imnacted or deeraded" fish habitat function.
Oprional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wedand represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wild3ife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
2. Wetland is publiclv owned and has "educational uses" and such use is documented for that site.
moderate
���►r
Test Linn Goa15 Inventory
etland Assessment Summary Sheet
etland Code: TU-OS
etland Class: PEM, PFO
ethod: � on site ❑ off-site
OFWAM
1
2
3
4
5
6
7
$
9
Jildlife Fish Water ydrologic Se
[abitat Habitat Quality Control to
a c c a
b a a a
a c a b
c c b a
a a c b
a a c c
c a
a
a
some deQraded depraded intact u
Field date: 3/21/02
Investigators: TB, LW
Observation point: data plot
itivit Enhancement Education
n act Potential
b a a
a b b
a n/a b
c b a
a a a
c b a
Aesthetic
��
��
��
''�
��
��
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose af wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cool'mg industrial water, or as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes ver 141-086.
, LSW Criteria. Wetland is locall si ificant if it meets one or more of the followin criteria:
1. Wedand rovides "diverse" wildlife habitat.
2. Wetland rovides "intacY' fish habitat.
3. Wetland rovides "intact" water uali function.
4. Wetland rovides "intact" h drolo 'c control function.
5. Wetland is less than'/< mile from a DEQ water quality limited water body (303 (d) list) and the
1
2.
wetland's water quality funcrion is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant cornmunities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segxnent mapped by ODFW as habitat for
indi:�enous anadromous salmonids, and has "intact" or "imUacted or degraded" fish habitat function.
onai LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a localty unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for tiiat site.
moderate
Yes I No
�
✓
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
i Code: TY-01
1 Class: PEM
: � on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
Vildlife Fish Water ydrolog
[abitat Habitat Quali Control
b b a b
b a a a
c c a c
c a b c
c a c b
a c c c
a a
a
a
some dearaded deeraded deeraded
Field date: 4/23/02
Investigators: TB, LW
Observation point: trail near plot #1
5ensitivit Enhancement Education
to Im act Potential _
b b a
b a a
c a b
c c a
c a a
c a a
not sens. I moderate I educational
Aesthetic
��
��
��
��
��
��
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) u.sed for acrive surface mining or acrive log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construcrion; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or vortion thereof is contaminated bv hazardous substances, materials or wastes ver 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intacY' hydrologic control function.
5. Wetland is less than 1 /4 mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
S. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indieenous anadromous salmonids, and has "intact" or "imnacted or deeraded" fish habitat funcrion.
1
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;.
c) "intacY' or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is nubliclv owned and has "educational uses" and such use is documented for that site.
moderate
Yes I No
�
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: WI-01
Class: PEM, PFO
� on-site n off-site
OFWAM Wildlife Fish Water
Question Habitat Habitat Quality
#
1 a c b
2 b b a
3 a c a
4 c a a
5 a c a
6 a b c
7 a
8 c
9 b
Descrivtor some de�raded deeraded
FieId date: 4/3/02
Investigators: TB, LW
Observation aoint: at <
ydrologic Sensitivity Enhancement Education
Control to Impact Potential
��
��:
��
��
��
��
��
a a
c a
n/a b
a a
b a
b a
intact
Quality
a b
a b
a a
b a
b a
b a
educarionallrecreationall moderate
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created enrirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacP' fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetiand provides "intacP' hydrologic control function.
5. Wetland is less than'/4 mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered. .
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, and has "intact" or "impacted or deQraded" fish habitat function.
1
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the foliowing criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
WetIand is pubiiclv owned and has "educational uses" and such use is documented for that site.
Yes I No
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
OFWAM
Code• WI-Ola
Class: PEM
❑ on-site � off-site
Field date: 4/3/02
Investigators: TB, LW
Observation point: Willamette Park trail to south
Education
Potential
a c
c a
n/a b
b a
b a
b a
0
�
0
�
�
G
�
�
C
Jildtife Fish Water ydroIogic Se
[abitat Habitat uali Control to
b n/a b b
c a a
c a b
b c c
b c c
a c c
a a
a
b
some n/a desraded deeraded n
a
c
c
c
c
not
Exciusions. Wetland is not locally significant if one of the following condirions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or acrive log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, fazm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habita�
2. Wetland provides "intact" fish habitat.
3. Wefland provides "intacY' water quality funcrion.
4. Wetland provides "intact" hydrologic control funcrion.
5. Wetland is less than'/4 mile from a DEQ water quality limited water body (303 (d) Iist) and the
wetland's water quality function is described as"intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endan ered. �' .� ^
8. Wetland has a direct surface water connecrion to a stream e ent mappe�t"iy ODFW as habitat for
indieenous anadromous salmonids, and has "intacY' or "imnacted or de�aded" fish habitat funcrion.
Optional LSW Criteria. Wetiand is locally significant if it meets one or more of the following criteria:
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' s� "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat; �
c) "intacY' or "impacted or degraded" water quality; ot
d) "intact" or "impacted or degraded" hydrologic control.
2. Wetland is publicly owned and has "educational uses" and such use is documented for that site.
eation Aesthetic
Quali
a c
a a
b c
b b
b a
b a
�tial moderate
Yes No
�-
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
etland Code: WI-02
etland Class: PFO, PEM
ethod: � on-site ❑ off-site
OFWAM
�
0
�
�
�
3
�
3
�
Jildlife Fish Water ydrolog
[abitat Habitat Quali Control
a a b a
a a a a
a c a a
c a a b
a c a a
a b c _ c
a a
c _
a
some desraded de�raded intact
Field date: 4/4/02
Investigators: TB, LW, AK
Observation point: 9`� Street
�ensitivi Enhancement Education
to Im act Potential
a a b
b c b
c n/a b
a a a
a a b
a b b
eation Aesthetic
Qualit
b c
a b
c c
b a
b b
b b
�ntial not vleasin
Exclusions. Wetland is not locally significant if one of the following condirions applies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or conshuction; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes ner 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intact" hydrologic control function.
5. Wetland is less than'/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality funcrion is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, and has "intact" or "impacted or degraded" fish habitat function.
1
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacY' or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documentE
criteria:
for that site.
Yes I No
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
Code: WI-03
Class• PSS
� on-site ❑ off-site
OFWAM
1
2
3
4
5
6
7
8
9
Field date: 4/5/02
Investigators: TB. LW. AK
Observation point: 4`� Street
Wildlife Fish Water ydrologic Sensitivi Enhancement Education
Habitat Habitat uali Control to Im act Potential.
b a a a a n/a b
a a a a b b
b b a b c a
c a b a c b
a a c a a b
a a c c a b
a a
a
a
diverse intact de�raded intact votential n/a
Aesthetic
��
��
��
��
��
��
not
Exclusions. Wetland is not locall si 'ficant if one of the following condirions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controliing, storing, or maintaining stormwater,
b) used for active surface mining or acrive log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentzonally $om irrigation or construction; or
e) created for the purpose of wastewater treatment, cranberry production, fatm or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazard.
2. Wetland or nortion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
is locally significant if it meets one or more of the followin� criteria:
�
2.
1. Wetland provides "diverse" wildlife habitat.
2. . Wetland provides "intacY' fish habitat.
3. Wetland provides "intacY' water quality funcrion.
4. Wetland provides "intact" hydrologic control funcrion.
5. Wetland is less than '/< mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality funcrion is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indigenous anadromous satmonids, and has "intact" or "impacted or degraded" fish habitat function.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the
Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
Wetland is nubliclv owned and has "educarional uses" and such use is document
criteria:
that site.
✓
�'
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
[� �►+�'/_\►i I
1
2
3
4
5
6
7
8
9
Code: WI-04
Class• PEM, PFO
� on-site ❑ off-site
Jildlife Fish Water ydrologic Se
[abitat Habitat Qualit Control to
a c a a
b a a a
b c a a
c c a c
a a c b
a a a c
c a
a
a
some dearaded degraded intact v
Field date: 4/23/02
Investigators: TB, LW
Observation point: data plot
itivi Enhancement Education Recreation
n act Potential
a a a a
a a a a
a a b a
c a a b
c a a a
c b a b
educational
Exclusions. Wetland is not locall si ificant if one of the followin conditions a lies: Yes
1. Wetland is artificially created entirely from upland AND is either: ❑
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from irrigation or construcrion; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settlin of sediment, coolin industrial water, or as a olf course hazazd.
2. Wetland or nortion thereof is contaminated bv hazardous substances, materials or wastes ner 141-086. ❑
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intact" water quality function.
4. Wetland pr.ovides "intact" hydrologic control function.
5. Wetland is less than'/a mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as"intact" or "impacted or degraded."
6. Wetland contains one or more rare plant comrnuniries.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indisenous anadromous salmonids, and has "intacY' or "imnacted or de�raded" fish habitat function.
Optional LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland represents a locally unique native plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intact" or "impacted or degraded" hydrologic control.
2. Wetland is nubliclv owned and has "educarional uses" and such use is documented for that site.
Aesthetic
b
a
a
a
a
a
moderate
No
�
✓
�est Linn Goal 5 Inventory
etland Assessment Summary Sheet
Code: WI-OS
Class; PEM
� on-site ❑ off-site
OFWAM Wildlife Fish
uestion Habitat Habitat
1 b c
2 b a
3 c c
4 c c
5 c a
6 a a
� G
8 a
9 a
Descrintor some desradec
Water
0
0
0
0
0
�
Control
a
a
c
c
b
c
a
Field date: 4/23/02
Investigators: TB, LW
Observation point: east side of pond
to
Aesthetic
��
��
��
��
��
��
itivity Enhancement Education
npact Potential
a a a
a c a
a n/a b
c c a
c a a
c b a
moderate
Exclusions. Wetland is not locally significant if one of the followin conditions a lies:
1. Wetland is artificially created entirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintentionally from imigarion or construcrion; or
e) created for the purpose of wastewater treatment, cranberry producrion, farm or stock watering,
settlin of sediment, coolin industrial water, or as a o1f course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intact" water quality function.
4. Wetland provides "intacY' hydrologic control function.
5. Wetland is Iess than '/4 miie from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality funcrion is described as "intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wedand is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indigenous anadromous salmonids, and has "intact" or "impacted or degraded" fish habitat fimction.
1
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following critE
Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intacY' or "ixnpacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hyd.rologic control.
Wetland is nubliclv owned and has "educarional uses" and such use is documented for that site.
moderate
Yes � No
✓
�
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
i Code: WI-06
i Class• PEM, PFO
: � on-site ❑ off-site
;�7 �i/_�► I
Water
Field date: 5/2/02
Investigators: TB, AK
Observation point: parkin� lot to south
Fish
;stion Habitat Habitat Quali Control to Im ac
1 a c a a a
2 a a a a a
3 b c a b a
4 c c b c c
5 b a c a c
6 a a a c a
7 c a
8 a
9 a
;rintor some de�raded deQraded intact sensitive
Enhancement Education
Potential
a c
a a
a b
b a
a a
c a
Exclusions. Wetland is not locally significant if one of the following conditions appiies:
1. Wetland is artificially created enrirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for active surface mining or active log ponds;
c) a ditch without free and open connection to natural waters of the state and no food or game fish;
d) less than one acre in size and created nnintenrionally from irrigation or construcrion; or
e) created for the purpose of wastewater treatment, cranberry production, farm or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated bv hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intacY' fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intacY' hydro�ogic control funcrion.
5. Wetland is less than'/4 mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as"intact" or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensirive, threatened or endangered.
8. Wetland has a direct surface water connecrion to a stream segment mapped by ODFW as habitat for
indi�enous anadromous salmonids, and has "intact" or "impacted or degraded" fish habitat function.
1
�
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
Wetland represents a locally unique native plant community AND provides:
a) "diverse habitat" or "habitat for some wildlife species";
b) "intact" or "impacted or degraded" fish habitat;
c) "intacP' or "impacted or degraded" water quality; or
d) "intacP' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for that site.
Aesthetic
a b
a a
c a
b a
a a
b a
moderate
Yes i No
✓
�
�est Linn Goa15 Inventory
etland Assessment Summary Sheet
Code: WI-07
Class• PEM
❑ on-site � off-site
OFWAM
0
�
3
�
�
�
�
0
�
Water
Field date: 5/23/02
Investigators: TB
Observation point: river bank to west
to
Fish
Habitat Quali Control
b c a a a
b a a a a
c c a a a
c c a c c
a a c b a
a a a c c
c a
a
a
some de�raded intact intact sensitive
Enhancement Education
Potential
a c
a a
a b
a a
a b
c b
Exclusions. Wetland is not locally significant if one of the following conditions applies:
1. Wetland is artificially created enrirely from upland AND is either:
a) created for the purpose of controlling, storing, or maintaining stormwater;
b) used for acrive surface mining or active log ponds;
c) a ditch without free and open connecrion to natural waters of the state and no food or game fish;
d) less than one acre in size and created unintenrionally from irrigation or construcrion; or
e) created for the purpose of wastewater treatment, cranberry production, fann or stock watering,
settling of sediment, cooling industrial water, or as a golf course hazard.
2. Wetland or portion thereof is contaminated by hazardous substances, materials or wastes per 141-086.
LSW Criteria. Wetland is locally significant if it meets one or more of the following criteria:
1. Wetland provides "diverse" wildlife habitat.
2. Wetland provides "intact" fish habitat.
3. Wetland provides "intacY' water quality function.
4. Wetland provides "intacP' hydrologic control function.
5. Wetland is less than'/4 mile from a DEQ water quality limited water body (303 (d) list) and the
wetland's water quality function is described as "intacY' or "impacted or degraded."
6. Wetland contains one or more rare plant communities.
7. Wetland is inhabited by any species listed federally as threatened or endangered, or state listed as
sensitive, threatened or endangered.
8. Wetland has a direct surface water connection to a stream segment mapped by ODFW as habitat for
indiQenous anadromous salmonids, and has "intact" or "imnacted or desraded" fish habitat funcrion.
L
2.
onal LSW Criteria. Wetland is locally significant if it meets one or more of the following criti
Wetland represents a locally unique narive plant community AND provides:
a) "diverse habitaY' or "habitat for some wildlife species";
b) "intacY' or "impacted or degraded" fish habitat;
c) "intact" or "impacted or degraded" water quality; or
d) "intacY' or "impacted or degraded" hydrologic control.
Wetland is publicly owned and has "educational uses" and such use is documented for that site.
Aesthetic
b � c
a a
c a
b a
a a
b a
Yes I No
✓
Appendix C
�__
OF�VAM Characterization
�,, don Freshwater Wetland Assessment Methodology
Watershed setting
All questions pertaining to the watershed can be answered in the office
from aerial photographs, U.S. Geological Service topographical
maps, and other reference materials. (See Appendix A.) The answers
to these questions are used to give decision makers a broader under-
standing of ecological functions and land uses in the watershed. The
answers are summarized on the Watershed Summary Sheet at the end
of the Assessment Questions section.
Drainage basin
The Oregon Water Resources Department has divided the state into 18
drainage basins. Check th� map in Appendix -H to see which draihage
basin contains the study site.
1. What is the name of tl�e drainage basin that contains your
assessment area?
Physrcal characteristres of the watershed
being assessed (within the drainage basin)
Topogrophy
What is the watershed's area in square miles? The watershed area
is often much sinalier than the drainage basin (see Appendix E).
3. Calculate the average slope of the watershed {see Appendix F�.
Hydrologic profile
4. Is the stream flow in the watershed modified by dams,
channelization or levees? (Choose all that are appropriate.)
a. Tributary streams to the main stem stream are modif'ied.
b. Main stem stream is modified.
c. Stream flow.is not modified (free-flowing.)
5. Is water being taken out of the stream(s) through active diking,
drainage or irrigation districts in the watershed upstream of the
assessment area?
a. Yes.
b. No.
Watershed Notes
�`�l� WU�+�GG�C. �v�PX E.� �II�A�+�C �-
Cl�s�n. ��a� � a� �I��.��
� �P.N- !�` 1 � .
C -r
b C��, ��
�
-� I�a,la�. P�e.r � tJ�°Q''' ��'�
{�(� �AM� �+�vPX
30 � Speclal interest & characterizatian
West Linn Watershed Area and Average Slope
Barlow Creek 201 11
Bernert Creek 412 7
Bolton Creek 117 12
Cama ssia 219 12
Cascade Springs Pond Creek 52 7
Fem Creek 555 8
Heron Creek 123 10
Maddax Creek 106 14
Mary S Young Creek 269 10
McLean Creek 38 11
Su�set Creek 77 13
Tanner Creek 659 7
Trillium Creek 543 7
Tualatin River (includes Fritchie Creek trib.) 702 9
Turkey Creek 20 7
Willamette River (excluding above watersheds) 1165 11
Oregon Freshwater Wetland Assessment Methadodogy
Land uses within the watershed
6. What is the dominant land use in the watershed upstream from the
assessment area?
a. Urban.
b. Urbanizing (mix of urban, agriculture and forest uses).
c. Agriculture (farmiug, ranching or grazing).
d. Forested or natural area. �
WCrf@r CrLICyII �(Use more specific water qunlzty info�matian, if available.
�Contact local DEQ o„�iee, or cadl the DEQ lab at (503) 229-5983 for sampling
information.)
7. Consult the most recent State of Oregon Department of Environ-
mental Quality 305(b) Report to deternune whether any streams
in the study area are listed as a water quality limited. (You may
want to ask DEQ whether there are any proposed changes.) This
information is included in Clean Water Act section 303(d)
repoRing.
a. 'Streams orportions:of streams within the study area are listed
as water quality limited.
b. No. streams or:portions of streams within the study area aze
� listed as water quality limited.
8. ConsultthemastrecentOregonStatewideAssessmentofNonpoint
Sources of WaterPodlution to deteimine the water quality condi-
tion of stream reaches in the watershed upstream from the
assessment azea. (If both "b" and "c" apply, choose "c.")
� a. All upstream reaches are Iisted as no problem (or no data
available).
b: One or more upstream reaches are listed in moderate water
quality condition. _
c. One or more upstream reaches are listed in severe water
quality condit�on.
`�.
� ;.
Watershed Notes
�, -- I�!�, � w�u��� P�
a - a�k�r w�'Gu.�
- v����.t�,� , d�.e..�. gs� . av, �S�
b
� — �' �ov� � wJU��.�6e,
`�2�t?�X'
c
^� J � � 5�.
V
, „
J
. � � � �`'
,
.
� �. , ; . , �.
Special interest 8r characterizotion 31
Oregon Freshwater Wetland Assessment Methodology
Biological characteristics of the watershed
9. Fisheries: Select all that are appropriate and list type if known.
(Contact local Oregon Department of Fish and Wildlife o� ce far
this utformation.)
Type
a. Cold water.
b. Warm water:
c. Anadromous.
d. Wild population. �
e. Introduced or hatchery
populations.
f. None.
g. Other (list).
10. Are known sensitive, threatened or endangered fish species
present in the watershed? If so, list which species.
Species
a. Yes.
b. No. '
c. Unknown.
Watershed Notes
� ..h�va,�i, e c�, �►��,('�. �
�N�t�a�:e�e �exs
Gl. F.�.�n� �0 t�, �eYN.,� ��41�Nt¢X
CP��
I ,>. � � '�
� � � � �� .
—�- , �, ' :
� � �
11. Wildlife species: Select all that are appropriate and list species if
known. (Contact local Oregon Department of Fish and Wildlife
off'ice for this inforniation.)
Spe.cies
a. Migratory 6irds. •
b. Big game.
c. Nesting birds:
12. Are known sensitiye, threatened or. endangered plant species or
wildlife species other than fish present in the watershed? If so, list
which species. (Contact local ODF'W off'ice or Natural Heritage
Council for this information.)
Species
a. Yes. �
b. No.
c. Unknown.
�, �Q � �G ChN►�t�wf�S '�'
�.e ��
� — �c�� C� ►�,�;
►�. .,�,,��, ��:��c��>
_ - rv�� �1�. � �ti`�(�
�t � btlD�b 4�1 I ���
t "e� t�'� �'�
��� ��� . ��
- Oregon Freshwater Wetland Assessment Methodology
(,vestLi�� - ,8�.v� �
Watershed Notes
Figure 1. Watersheds as corridors for wildlife movement.
Areas A and B are the end points of a movement corridor through the watershed.
Natural areas are shaded darkly, the irregular polygons represent highly developed
areas, and the thickblack line represents an impassable barriersuch as an interstate
highway. In the first part of the illustratdon, the contiguous natural area connects
both ends of 1he corridor. The developed area is a barrier, but it does not obstruct
species movement. The second half of the illustration shows fragmented natural
areas with an impassable barrier. If the barrier stopped at the smatler developed
area and did not continue off'the lower left, species movementwould still be possible.
13. Does the watershed provide a natural corridor for fish or wildlife
movement? (Observe from aerial photographs.) List whether
for fish, wildlife or both. Consider fences, dams and other
barriers to travel. Aerial photographs of the watershed area are
the best source of in�formation. Fragmented systems have barriers
to movement or a section where the natural area is broken by
developed area.
A corridor is a landscape feature that enables fish or wildlife species
to travel between brnad geographical areas. (See Figure 1.)
a. There are contiguous natural areas that allow species
movement, and if barriers exist, they do not stop animal or
fish movernent.
b. The natural areas are fragmented, but species movement is
still possible.
c. The habitat system is fragmented, and there are barriers to
species movement.
14. What are the landscape features at both ends of the movement
corridor? (These may lie outside the assessment area.) From an
aerial photo, observation or local knowledge, determine whether
there are large natural areas at either end of the movement
corridor. The natural area does not have to be a wetland.
a. Large natural habita.t areas aze at both ends.
b. One end has a naturat habitat area and the other end is
developed.
c. Both ends are developed.
Special interest & characferization 33
•Oregon Freshwater Wetland Assessment Methodology
Individual wetland sites
Fill out this part of the characterization for each wetland in
assessment area. Some of the information can be gathered in
office; some must be gathered at the site. You may want to do a roi
sketch of the site (doesn't have to be to scale) to refer to back in
office.
Wetland structure and re/ation to
surrounding landscape
r 15. What percentage of the area within 500 feet of the wetland's ec
is dedicated to the Iand uses listed below? (From overlay 2 0
the field.)
It is best to deternune the land uses from a recent aerial photc
an aerial photo is not available, measure 500 feet in the fielc
get an idea of distance to evaluate. Use the following ranges
your answers for each land-use category:
a. Less than 20%.
b. Between 20% and 50%.
c. Greater than 50%.
1. Open Space (includes natural areas, parks and developed
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchards, range land
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial or industrial—
ruraland nrban).
5. Other (list).
r16. What is the dominant existing land use within 500 feet of
wetland on the downstream or down-slope edge of the wetiv
Use the same land-use categories as question 15.
17. What is the wetland's area iz� acres? (Measure the entire are�
contiguous wetland, not just the portion within the assessm
area. Use the dimensions of the wetland as outlined on the b
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
✓ Questions preceded by a check mark can be completed in the field.
34 Special inferest & characterization
�� D/ �3Lr D Z
Wetland 1 Wetland 2 Wetland 3
° Oregon Freshwater Wetland Assessment Methodology
a b c
� {� �
�� . g . �� : ; ,.�: S >� _ :� ���'•
t�� F [��� �. ,}�� �
� � `�§ a� � �t�3°` ��f ( �"; e �� �' g ;
���e , k�� fi ���-; . $�� . �_' 3 k�z ���Y ' ` L��. , �� g .� $�� :.
� a , :�t a.� � .. g
s •
�������� �����!#� �� ����'la
��t 3 + .� � ; s� x
�f
�'s`� �'�`� ��; F ' �.r� � � ��� `� � � ��� ���'�� �� �
Figure 2. Connectivity to streams, lakes and ponds.
The lightly s�aded area represents a wetland, the darkly shaded area represents a
lake or pond and the dark line represents a stream. Part "a" shows the wetlared
connected to a stream, lake or pond, part "b " shows a, stream, lake or pond within
1 mile but no surface connection, and pan "c" shows no stream, lake or pond within
1 mile and no surface connecrion.
18. How is the wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may.be by a culvert, irrigation ditch, inter-
mittent stream or perennial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all or parE of the wetland located within the 100-year floodplain
(use floodplain maps to determine} or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. Yes.
b. No. .
�'��� �� �
Wetland 1 Wetland 2 Wetland 3
�
� g
�
Special interesf & characferization 35
Oregon Freshwater Wetland Assessmeni Methodology
20. What percentage of the area within 500 feet of the wetland's edge
is zoned for each of the land uses listed below?
Use the following ra.tzges for your answers:
a. Less than 20%
b. Between 20% and 50%
c. Greater than 5�%.
l. Open Space (includes natural a.reas, parks and developed
recreation areas, but not lands zoned for Exclusive Forest
Use).
2. Agriculture (pasiure, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residentiat, commercial, industrial). �.
5. Other (list).
Wetland habitat
r21. What percentage of the wetland's area is covered by the follow-
ing Cowardin wetland classes? ( Cowardin wetland classes refer
to a classification of wetland type by vegetation cover. See
Appendix D.) Only list those that compose 10% or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. Use the following categories for your answers:
a. Between 70% and 100°Io.
b. 50% or more, but less than 70%.
c. 20% or more, but less than SO%.
d. 10% or more, but less than 20%.
1. Open water (deep water habita.t, greater than or equal to
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants
that can tolerate flooding and living in wet soils). ���
3. Scrub-shrub (woody vegetation under 20 feet tall).
4. Forested (woody vegetation 20 feet or taller). -.r °�
r22. For urban areas, how many wetland plant species are present?
(You need not list the species name.)
a. More than 5 plant species.
b. Between 2 and 5 plant species
c. 1 plant species (monotypic).
r23. What is the dominant wetland vegetaxion cover type?
a. Woody vegetaxion (forested and scrub-shrub}.
b. Emergent vegeta.tion and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
���� ��°'�r �
Wetland 1 Wetland 2 Wetland 3
�-.�., �
�:- �
, �
�.
�.. �
� �
�
36 Special interest 8r characterization
' Oregon Freshwater Assessment Methodoiogy
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembies the interspersion of Cowardin wetIand classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland azea surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a complex pattern have a moderate interspersion
pattem. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
interspersion pattem. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to determine
the complexity of the interspersion pattern and draw a sketch of
the wetland.
a. High.
b. Moderate.
c. Low.
High Interspersion (a)
� , ;
Moderate Interspersion (b)
Low fnterspersion (c)
Figure 3. Interspersion of Cowardin classes and upland inclusions.
���.� �:"��
Wetlaaad i Wetland 2 Wetland 3
�,a �
Special interest 8c chcracteri2ation 37
Oregon Freshwater Wetlarad Assessment Methodology
�25. For rural areas: What percentage of the wetland's edge is
bardered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland �abitat for this question. Actively farmed
lands are not considered wildlife habita.t. (See Figure 4.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
r26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffez consists of trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure 5.)
a. Greater than �0%.
b. Between 10% and 40%.
c. Less than 10%.
27. How is the wetland connected to oCher wetlands? (Look at an
aerial photo or map to determine this.}
a. Connected to other wetlands within a 3-mile radius by a
perennial or intermittent stream, irrigarion or drainage
ditch, culvert, canal or lake.
b. Not connected�by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other unconnected. wetlands lie within a 3-mile radius.
28. Estimate the area of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c: Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
���'� ����
Wetland 1 Wetla�td 2 Wetland 3
,.�
� �
�,.. �
� �
38 Special interest & characterization
' Oregon Freshwater Wetland Assessment Methodolog}�
Wetland 1 Wetland 2 Wetland 3
�
��
" s�s � 3 � + � �'�`� :': ° 4,.
, � ' �° f a ��:� �•_
i �P � � a � �s �� 4��
# �%, sr�� € ��.� a
e t �3b t E �(` �� x
�����������r`�������: ��������`;��;� .
� �� �" ��� ����� ��,�� ���������� ��������
�,�.', �� �� a � �
� �
��� �� ���� �
�� �
.a �.� �R, �k r�"�"��
� -r a „a �. � �`s�� "'�:
< � �; � �-� :
Figure 4. Percent of wetland edge bordered by upla�d habitat
{for Question 25). *
The dashed line delineates the area within I50 feet of the wetland; the "wq,odland "
and "6rush " areas are upland habitat; and the lines perpendicular to the wetdand
edge indicate where the upland habitat adjacent to the wetland habitat is at lea 1 SO
feerwide. The dark Zines (portions of the wetland bordered by upland habitat at 1'ertst
1 SO feet wide) make up roughly one-third (between 10% and 40%) of the wetla�
perimeter.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 26).
The dashed line delineates the area within 25 feet of the wetland; the vegetative
bufferareas are labeted "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative buffer adjacent to the wetland habitat is at least 25 feet
wide. The dark lines (portions of the wetland bordered by a vegetative buffer at least
25 feet wide) make up roughly one-rhird (between 10% and 40%) of the wetdand
perimeter.
3pecial interesf & characterization 39
Oregon Freshwater Wetland Assessment Methodology
Fisheries habitat
�� � �
Wetland 1
� n�, �
Wettand 2
Wetland 3
29. Are fish present in a stream, lake or pond connected ta the
wetland.
a. Salmon, trout or sensitive species are present at some time
during the year.
b. Species not covered in "a" are present at some time during
the year.
c. No species are present at any time during the year.
Streams connected to the wetland
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
r30. What is the physical character of the stream channel? To observe
stream channel modif'ications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel; or modif'ied portions of
the stream are returning to a natural channel.
b. Oniy portions of the stream are modified.
c. The stream is extensively modif'ied or confined in a non-
vegetated channel or pipe.
�31. What percentage of the stream is shaded by streaxnside (riparian)
vegetation?
a. Greater than 75°Io.
b. Between 50 and 75%.
c. 25°l0 or more, but less than 50%.
d. Less than 25%. �
✓32. What percentage of the stream contains instream structures such
as large woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
CCy�CeS Of pOl7C�S (entire lake or pond and wefland complex)
Complete this section only if the wetland being assessed has a surface
water connection to a lake or pond.
33. .Does the lake or pond conta.in areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
�
�
�
�
�
�i
� �'
N� ��-�
40 Special interest 8c characterization
, ' Oregon Freshwater Wetlancl Assessment Methodology
�34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a. 60% or more.
b. 20% or more, but less than 60%.
c. Less than 20%.
r35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Determine in
the field or in the office. This may be diff'icult to determine. If a
surface water connection exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
Groundwater, including springs or seeps.
r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains an trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to determine or not applicable.
c. No.
r38.Is water flow out of the, wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
�j�;, ` � ��.'� �
Wetland 1 Wetland 2 Wetland 3
�,y.- G�l....
�-- ��
� ;�'� �". ) b
q�k 9
� � �.�.�t��
G; � � ,�^ �`'N:�r��v�
�' �,�, � [ �`���
� �
�
� ����`"-:
� �""��`� �
�� ��'� �R.�
� �'' �,�,���
.�.'� � �
Special interest & characterization 41
Oregon Freshwater Wetland Assessment Methodology
�
s,
r39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
strea.m in a pipe.
a. Yes.
b. No.
Public access to wetland site (setect an appropriate area
to observe the wetland to answer these questions.)
41. Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the puhlic.
b. Yes, but wetland access is allowed only by pernussion of
the landowner or managing entity.
c. No, access is not allowed.
r42. Are there visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. Na
b. One or two visible safety hazards exist (describe).
c. More than two visible safety hazards exist (describe).
r43. Are there other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent.)
b. No.
Wetland 1 Wetland 2 Wetland 3
� �
�,. �."�'�, .
� �
� �
�� ����� b���
YD°`� � ���,
�
u!����
� �
�� � ���� .
42 Special interest & characterization
. , Oregon Freshwater Wetland Assessment Methodology
r44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
ather habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
�45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
r46. Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the area is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recreation
�47. Is the wetland accessible by boat?
a. Boat launching areas or access points exist on site or within
1/2 mile on a connected lake, river, bay or other body of
water.
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points exist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
� �� µ �,�
Wetland 1 Wetland 2 Wetland 3
� �
� �
� '� �` #�,.��r�`�� � �
�"� �``"�` �'�„`� � �
�- �
� ����
;,� ��'T. �
�
;� �
Special interest & characterizafion 43
Oregon Freshwater Wetland Assessment Methodology
r48. Are there trails, viewing areas or other structures that guide user
movement to a particular area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, undeveloped txails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife office.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either all or part of the year}.
b. No.
c. Not applicable.
50. Is hunting allowed at the wetland? (If the wetland is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either alI or part of the year).
b. No.
Aesthetics
r51. For rural areas, what is the extent of visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with sunounding landscape.
c. Little or no contrast with surrounding landscape.
r52. For urban areas, what is the visual character of the surrounding
area? (See Figure 7.}
a. Open space or naturally landscaped areas.
b, Areas landscaped or manipulated by people.
c. Developed with no landscaping.
r53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland? �
a. Yes.
b. No.
r54. If the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
�+' � 3� � �`
Wetland 1 Wetland 2 Wetland 3
� �
� �
.� �
�
ca�.. �
� �
S�^ R �`'�� �
� s ,��. � �•�
.�-,� -. ,
� �
44 Special interest & characterization
�� Oregon Freshwater Wetland Assessrnent Methodology
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
✓55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
BG— � �,�,d. �,
Wetlarcd 1 Wetland 2 Wetland 3
(,,,.���` ,��"�" d, � � � � ,
�. q�.. ,:=.
I �i.�
� �'�
�
���� �" ��
���;.-�'��.
�� � �,
g � �
�
Special interest & chcracterizafion 45
Figure 6. Visual contras�
The top part of the figure shows a wetland wirh significant visual contrast with the
surrounding landscape. The bottom part shows a wetland with little or no visual
contrast with the surrounding landscape.
__ ... _
Oregon Freshwater Wetland Assessment Methodology
���� ��'� y ��
Wetlr�nd 1 Wetland 2 Wettand 3
r56. What noises are audible at the primary viewing location(s)?
a. Bird and wildlife noises and other naturally occurring
sounds.
b. Some traffic and other similar backgraund sounds are
audible in addition to naturally occurring souncl.s.
c. Continuous traff'ic or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continuous traffic or other intrusive naise is audible, but no
naturally occurring sounds are.
r57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50°l0.
b. Between 25°Io and 50%.
c. Less than 25%.
�58. How many Cowardin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.)
a. More than twa
b. Two
c. One
� �%'
� �
� �
46 Special interest & characterization
Figure 7. Visual character of urban wetlands.
Beginning with the left part, this figure shows an urban wetdand with naturally
dandscaped areas, areas landscaped by people and with unlandscaped devel-
oped areas.
Oregon Freshwater Wetland Assessmeni Methodology
n U ,
Camassia - West Linn OFWAM
Individual wetland sites
Fiil out this part of the chazacterization for each wetland in the
assessment azea. Some of the information can be gathered in the
office; some must be gathered at the site. You ma.y want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and rela tion to
surrounding landscppe
� 15. What percentage of the azea within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.)
It is best to determi.ne the land uses from a recent aerial photo. If
an aerial photo is not available, measure 500 feet in the field to
get an idea of distance to evaluate. Use the foIIowing ranges for
your answers for ea.ch land-use category:
a. Less than 20°l0. �
b. Between 2U°!o and 50%.
c. Greater than 50°l0.
1,�'Open Space (includes natural areas, pazks and developed
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. D�veloped uses (residential, commercial or industrial—
rural and urban).
5. 4ther (list).
r16. What is the dominant existing land nse within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as .quesrion 15.
17. What is the wetland's area in acres? (Measure the entire area of
contiguous wetland, not just the portion within the assessment
azea. Use the dimensions of the wetiand as outlined on the base
map.)
a. Greater than 5 acres.
b. $etween 0.5 acres and 5 acres.
c. Less than 0.5 acres.
_�uestions preceded by a check mark can be completed in the field.
34 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
C
�-
Camassia - West Linn OFWAlVI
a b c
;� �- ��
������ � �� � � �
��� �� ��� ��� � �� �
i g �
�5�,�� �'���������"'. '����������� '' ;''� ��� ����� ;
,�,< ;%, ,
�
y�� � �� �
� � �
��� ����� � 3� � � ��� � ���� ��
� � ��� ��� �:��� � �����, ;, "� ���% ����� �
�gure 2. Connectivity to streams, lakes and ponds.
The lightly shaded area represents a wetlancl, the darkly shaded area represents a
lake or pond and ihe dark line represents a stream. Part "a" shows the wetland
connected to a stream, lake or pond, pan "b" shows a stream, lake or pond within
1 mile but no surface connection, and pan "c" shows no stream, lake or pond within
I mile and no surface connection.
18. How is xhe wetland connected to another body of water, such as
a stream, lake or pond7 (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perennial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all orpart of the wetland located within the 100-yearfloodplain
(use floodplain maps to determine) or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. �Yes.
b. No.
1
Cp,.ol ��-�� �
Wetland I Wetland 2 Wetland 3 ��
�� � �` �� �
�
�
�
i
a
�
i
,�
;
�°
u
d�
i
�
j
�
�
�
(
j
�
�.o. � '� ca„ .� � �
�
� �
L
Y
� �
�
� � `: � � �
�
�
�;
;
�
�
Special interest & characterization 35
Oregon Freshwater Wetland Assessment Methodology
Camassia - West Linn OFW.AM
2Q. What percentage of the area within SQO feet of the wetland's edge
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20% and 50%
c. Greater than 50%.
l. Open Space (includes natural areas, parks and develoged
recreation azeas, but not lands zoned for Exclusive Forest �–
Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial, industrial). ----�.�
5. Other (list).
Wetland habita t
r21. What percentage of the wetland's azea is cavered by the follow-
ing Cowardin wetland classes? ( Cowardin wetland classes refer
to a classification of wetland type by .vegetation cover. See
Appendix D.) Only list those that compose 10°!0 or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. Use the following categories for your answers:
a. Between 70% and 100%. .
b. 50% or more, but less than 70%.
e. 20% or more, but less than 50%.
d. 10% or more, but less than 20%.
1. Open water (deep water habita.t, greater than or equal to --�
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants --�
that can toleraxe flooding and living in wet soils).
3. (woody vegetaxion under 20 feet tall). --�
4. Forested (woody vegetation 20 feet or taller). —.,.
�22. For urban areas, how many wet2and plan species aze gresent?,
(You need not list the species name.) �`�°�"'°`�''�°� G °""" ° ` -° '�`j
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic).
.23. What is t�he dominant wetland vegetation cover type?
a. Woody vegetation (forested,and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
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36 Speciat interest & charocterizotion
Oregon Freshwater Wetland Assessment Methadology
�
Camassia - �est Linn OFWAM
✓24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowazdin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion. .
Wetland and upland complexes that have at least two wetland
classes and a complex pattern have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex� pattem and lots of edge have a high
interspersion pattern. If the wetland you aze observing does not
reflect any of the diagrams, use the above guidance to determine
the comple�ty of the interspersion pattern and draw a sketch of
the wefland (��- G ��—^ +_ `��.l•� Ri, G_ G-�-FS�,�2��
a. High.
b. Moderate.
c. Low.
High Interspersion (a)
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Moderate Interspersion (b)
;s��
Low Interspersion (c)
Figure 3. Interspersion of Cowardin classes and upland inclusions.
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Wetland I Wet d 2 Wetland 3
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Special interest & characterization 37
Oregon Freshwater Wetland Assessment Methodology
Camassia - West Linn OFWAM
r25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at Ieast 15Q feet wide?
Brush, woodland, non-farnied agricultural land and range land
are considered upland habitat for this question. Actively farmed
lands aze nat considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10°k.
�26. For urban areas: What percenta.ge of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists af . trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure 5.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
27. How is the wetland connected to other wetlands? (Look at an
aerial photo or map to determine this.)
a. Connected to other wetlands within a 3-mile radius by a
pexennial or intermittent stream, irrigation or drainage
ditch, culvert, canal or lake.
• b: Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radins.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lie vvithin a 3-mile radius.
C�i- o� �=
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28. Estimate the area of unvegetated, open water within the wetland. .
a. More than 3 acres. ;� �} �
b. Greater than 1 acre, up to 3 acres.
c. Between 0:5 acre and 1 acre.
d Less than 0.5 acre. �
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38 Speciol interesf 8c characterization
Oregon Freshwater Wetland Assessment Methodology
Camassia - West Linn OFWAM
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 2�.
The dashed line delineates the area within 1 SO feet of the wetland; the "woodland "
and "brush" areas are upland habitat; and the lines perpendicular to the wetland
edge indicate where the upland habitat adjaceni to the wetland habitat is at least l50
feet wide. The dark lines (portions of the wetland bordered by upland habitat at teast
I50 feet wide) make up roughly one-third (betweerz 10% and 40%) of the wetland
perimeter. �
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 2�.
The dashed line delineates the area within 25 feet of the wetdand; the vegetative
buffer areas are labeled "buffer"; and the lines perpendicular to the wetland edge
� indicate where the vegetative bufferadjacent to the wetdand habitat is at least 25feet
wide. The dark lines (portions of the wetland bordered by a vegetative bu, f,�'er at least
25 feet wide) make up roughly one-third (between 10°lo and 40%) of the wetland
perimeter.
�
Special interest & characterization 39
�,q_ o(
Oregon Freshwater Wetland Assessment Methodology
^
Camassia - West Lmn QFWAM ��., � ����_�
Wetland I Wetland 2 Wetland 3
Fisheries habita t.
29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Sa.lmon, trout or sensitive species are present at some time
during the year.
b. Species not covered in "a" are present at some time during
the yeaz.
c. No species aze present at any time during the year.
Streams connected to the wet/and
Complete this section only if the wetland being assessed has an
unirnpeded surface water connection to a stream.
r30. What is the physical character of the stream channel? To observe
stream channel modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channel.
b. Only portions of the stream are modified. �
c. The stream is extensively modif'ied or confined in a non-
vegetated channel or pipe.
What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between 50 and 75 °lo.
c. 25% or more, but less than 50%.
d. Less than 25%.
r32. What percentage of the stream contains insiream structures such
as large woody debris, floating or submerged vegetation, lazge
rocks or boulders?
a. Greater than 25%.
b. Between 10°lo and 25%.
c. Less than 10%.
�C�C'@S O� jJO�IC�S (entire lake or pond and wetland complex)
Complete this section oniy if the wetland being assessed has a surface
water connection to a lake or pond.
33. Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be deternuned.
c: No.
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40 Special interest 8c characterization
Oregan Freshwater Wetland Assessment Methodology
i. . �
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Camassia - West Linn OFWAM
r34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a. 60% or more.
b. 20% or more, but less than 60%.
c. Less than 20%.
r35. What percenta.ge of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders? �
a. Greater than 25%
b. Between IO and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Determine in
the field or in the o�ce. This may be difFcult to determine. If a
surface water connection exists—stream, lake, ditch—use it as
the prunary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation oz sheet flow.
c. Groundwater, including springs or seeps.
�37. Is thez�e evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is l�own to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to determine or not applicable,
c. No.
�38. Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized cuivert}?
a. Yes, the outlet is restricted or the wetland has no outiet_.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
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Wetland 1 Wetland 2 Wetland 3
Special interest & characterization
�
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4l
Oregon Freshwater Wetland Assessment Methodology
Camassia - West Linn OFWAM
�39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a: Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. . Has the stream flow or streain bank been modified by human
activities less than 1 mile above the wedand? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
b. Na
Public access to wetland site (select an appropriate ar�a
to observe the wetland to answer these questians.)
41.
Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b. Yes, but wetland access is allowed only by permission of
the landowner or ma.naging entity.
c, No, access is not allowed. .
r42. Are there visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. No. '
b. One or two visible safety hazazds exist (describe).
c, More than two visible safery hazards exist (describe).
r43. Are there other natural landscape features, sucH as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes.. (List type and extent.)
b. No. �
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Wetland 1 Wetland 2 Wetland 3
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42 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
L1
�'.
Camassia - West Linn OFWAM
r44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made fram the site.
c. Public access daesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
�45. Does it appeaz that access to a viewing spot or wetland edge is
available for individuals with limited mobiliry? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical bazriers.)
r46. Is there a public access point within 250 feet of the wefland's
edge? Access points include parking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the area is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other azea that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recrea tion
r47. Is the wetland accessible by boat?
a. Baat launching areas or access points exist on site or wiihin
1/2 mile on a comnecteri lake, river, bay or other body of
water.
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points e�st within 1
mile of the wefland, and potential to develop launching
azeas or access points is limited.
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Special interest & characterization 43
Oregon Freshwater Wetland Assessment Methodology
Camassia - West Linn OFWAM
�48. Are there trails, viewing azeas or other structures that guide user
movement to a particular azea or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist
b. Yes, undeveloped trails or viewing azeas exist that do not
disrupt wildiife or plant habitat.
c. No trails or viewing azeas exist, or those that do disrupt
wildlife or plant habitat.
49. Is �shing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife o�ce.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either all or part of the year).
b. No.
c. Not applicable:
50. Is hunting allowed at the wetland? (If the wedand is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife off'ice for this informa-
tion.)
a. Yes (either all or part of the yeaz).
b. No.
Aesthetics
�51. For rural areas, what is the extent of, visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Lirnited contrast with surrounding landscape.
a Little or no contrast with surrounding landscape.
�52. For urban areas, what is the visual character of the surrounding
area? (See Figure 7.)
a. Open space or naturally Iandscaped areas.
b. Areas landscaped or manipulated by people.
c. Developed. with no landscaping.
r53. Are there visual detractors at the wetland site such as abandoned
cazs, litter, shopping carts or other objects that distract the viewer
from the wetland?
a. Yes.
b. No.
�54. If the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
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44 Speciol interest & characterization
Oregon Freshwater Wetland Assessment Methodology
E Camassia = West Linn OFWAM
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
r55. What odors are present at the primary viewing location(s)?
a. Narival, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment ptant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
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Specia! interest & charocferization 45
G�- o I �- - a��.::�.��
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Figure 6. Visuai contras�
The top pan of the ftgure shows a wetland with significant visual contrast with the
surrounding landscape. The bottom part shows a wetland with little or no visual
contrast with the surrounding landscape.
Oregon Freshwater Wetlund Assessment Methodology
Camassia - West Linn OFWAM
✓56. What noises are audible at the primary viewing location(s)?
a. Bird and wildlife noises and other naturally occurring
sounas.
b. Some traff'ic and other similar background sounds are
audible in addition to naturally occuiring sounds.
c. Continuous tr�c or other intrusive noise is audible in
additaon to naturally occurring sounds.
d. Continuous traffic or other intcusive noise is audible, but no
� naturally occurring sounds are.
✓57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a, Greater than 50°l0.
b. Between 25% and 50%.
c. Less than 25%.
✓58. How many Cowazdin classes are visible from the primary view-
ing a.rea(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
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d6 Se��cial interes� Rr charrarcterizntien
re 7. Visual character of urban wetlands.
. .zning with the left part, this fgure shows an urban wetland with naturally
caped areas, areas landscaged by people and wirh uniandscaped devel-
�,.. 1 areas.
Oregon Freshwater Wetland Assessment Methodology
FE77�c..�v c��
West Linn - �o��N+�o Ge�'K
Cascade Spruags Pond Creek
Individual wetland sites
Fill out this part of the chazacterization- for each wetland in the
assessment area Some of the information can be gathered in the
off'ice; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and re/ation to
surrounding landscape
r 15. What percentage of the azea within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.) ,
It is best to detemune the land uses from a recent aerial photo. If
an aerial phoCo is not avaitable, measure 500 feet in the field to
get an idea of distance to evaluate. Use the following ranges for
your answers for each land-use category:
a. Less than 20%.
b. Between 20°!o and 50°l0.
c. Greater than 50%.
1. Open Space (includes natural azeas, parks and developed
. recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchazds, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial or industrial—
rural and urban).
5. Other (list).
..16. What is the dominant existing land use within 500 feet of the
wetla�d on the downstream or down-slope edge of the wetland?
Use the same land-use categories as .question 15.
17. What is the wetland's area in acres? (Measure the entire area of
contiguous wetland, not just the portion within the assessment
azea. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
�uestions preceded by a check mark can be completed in the,field.
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34 Speciol inte�est & charocterization ,
Oregon Freshwater Wetland Assessment Methodology
�eSt �iTiri - =�'
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Cas�ade Springs Pond Creek __,� 5_.�{ �p_b�
�
Wetland I Wetlan 2 Wetland 3
a ;b c
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Figure 2. Connectivity to streams, lakes and ponds.
The lightly shaded area represents a wetland the darkly shaded area represents a
lake or pond and the dark line represents a stream. Pan "a" shows the wetdand
connected to a stream, lake or pond, pan "b" shows a stream, lake or pond within
1 mile but no surface connection, and part "c " shows no stream, lake or pond within
I mile and no surface connection.
18. How is the wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigarion ditch, inter-
mittent stream or perennial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No .surface-water connection exists to another body of
water, and no other bodies of water lie within 2 mile of the
wetland.
19. Is a11 or part of the wetland located within the 100-yearfloodplain
(use floodplain maps to determine) or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. �Yes.
b. No.
�.
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Speciai interest & charocterization 35
Oregon Freshwater Wetland Assessment Methodology
West Linn - �-
Cascade Springs Pond Creek
20. Whatpercentage of the azea within 500 feet of the wetland's edge
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 2U% and 50%
c. Greater than 50%.
1. Open Space (includes natural areas, pazks and develaped
recreation azeas, but not lands zoned for Exclusive Forest
Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial, industrial).
s. orner �St>.
Wettand habitat
-- r21. What percentage of the wetland's area is covered by the follow-
ing Cowardin wefland classes? ( Cowardin wetland classes refer
to a classification of wetland rype by .vegetation cover. See
Appendix D.) Only list those that compose 10% or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. IJse the following categories for your answers:
a. Between 70% and 100%.
b. 50°l0 or more, but less than 70%.
c. 20% or more, but less than 50%.
d. 10% or more, but Iess than 20%.
1. Open water (deep water habitat, greater than or equal to --
� 6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants —
that can toleraxe flooding and living in wet soils).
3. Sczub-shrub (woody vegetation under 20 feet tall).
4. Forested {woody vegetation 20 feet or taller).
v22. For urban areas, how many wedand plant species aze present?
(You need not list the species name.) �d°'"^�"'�"�-'"�°,` c°m""-`",
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic).
r23. What is the dominant wetland vegetation cover type?
a. Waody vegetaxion (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
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36 Specia0 Interest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - -��ra�ssiR .�
Cascade Springs Pond Creek �� ��
� „ r . :=--�5-�-o r:. ��,_�
Wetland I Wetland 2 Wetland 3
�
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowardin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a complex pattern have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
intezspersion pattern. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to determine
the complexity of the interspersion pattem and draw a sketch of
the wetland. l..s-r_ c�� o�',,'��:t:� A�� �. �_=:�-.�-,� J;
a. High..
b. Moderate.
c. Low.
High Interspersion (a)
Moderate Interspersion (b)
Low I'nterspersion (c)
Figure 3. Interspersion of Cowardin classes and upland inclusions.
�"".. � L:r
0
Special interest & characferization 37
Oregon Freshwater Wetland Assessment Methodology
West Linn - �
Cascade Springs Pond Creek
�25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agriculturalland and range land
are considered upland habitat for ttus qnestion. Actively farmed
lands aze not considered wildlife habitat. (See Figure 4.)
a. Greater than 40°l0.
b. Between 10% and 40%.
c. Less than 10%.
r26. Far urban areas: What percenta.ge of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta.-
tive buffer consists of trees, bushes or vegeta.tion that is not
regularly mowed or farmed. (See Figure 5.)
a. Grea.ter than 40%.
b. Between 10% and 40%.
c. Less than 10%.
�►�TII
28.
How is the wetland connected to other wetlands? (Look at an
aezial photo or map to determine this.)
a. Connected to other wetlands within a 3-mile radius by a
perennial or intermittent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands tie within a 3-mile ra.dius.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lie within a 3-mile radius.
Estimate the area of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c. Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
'FE I 'FE�c Z
-�"'grq'"�
w�er�a 1 werra,� a
.
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38 Special interest & charocterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - �ia
Cascade Springs Pond Creek �' FE—a�
�°�� �S—o I �-� E
Wetland 1 Wetland 2 Wetland 3
�
�
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area wishin 1 SO feet of the wetland; the "woodland"
and "brush" areas are upland habitat; and the lines perpendicular to the wetland
edge indicate where the upland habitat adjacent to the wetland habitat is at least 1 SO
feet wide. The dark lines (portions of the wetland bordered by upland habitat at Zeast
ISO feet wide) make up roughly one-third (betrueen 10% and 40%) of the wetland
perimeter.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 2fi}.
The dashed dine delineates the area within 25 feet of the wetland; the vegetative
huffer areas are labeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative buffer adjacentto the wetland habitat is at least 25feet
wide. The dark lines (portions of the wetland bordered by a vegetative buffer at least
25 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
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4�
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Special dnteresf & characterization 39
Oregon Freshwater Wetland Assessment Methodology
West Linn - �a ��i .F.�-aZ
, Cascade Springs Pand Creek ,�,�, G , s _ d �
Wetland I Wetland 2 Wetland 3 ��� •
Fisheries habitat.
�- 29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species are present at some time
during the yeaz.
b. Species not covered in "a" are present at some time during
, the yeaz.
c. No species are present at a:ny time during the year.
Streams connected to the wetland
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
✓30. What is the physical character of the s�eam channel? To observe
stream channel modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream aze reluming to a natural channel.
b. Only portions of the stream aze modified. .
c. The stream is extensively modified or confined in a non-
vegetated channel or pipe.
�. What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between 50 and 75%.
c. 25% or more, but less than 50%.
d. Less than �5%.
r32. What percenta.ge of the stream contains instream structures such
as large woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
�C�C@S O� rJ0/iC�S (entire lake or pond and wefland complex)
Complete this section only if the wetland being assessed has a sarface
water connecrion to a lake or pond.
33. Does the lake or pond contain azeas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be deternrined.
c. No.
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40 Special interest & characterization
Oregon Freshwater Wetland Assessrrcent Methodology
�,. .
West Linn - �ia ,� .�
- Cascade Springs Pond Creek ,., _..,r - � --
CS-cl �,o..��
Wetland 1 Wetland 2 Wetland 3
�
��
r34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a, 60% or more.
b. 20% or more, but less than 6Q%.
c. Less than 20%.
�35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders? -
a. Gieater than 25%
b. Between 10 and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Determine in
the field or in the office. This may be difficult to determine. If a
surface water connection exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs ar seeps.
�37. Is there evidence of flooding ar ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wedand. Is it in a distinct
topographic depression or adjacent to a streazn that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe). �
b. Unable to determine or not applicable.
c. ,No.
r38.Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
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a
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Special inferest & chcrrocterization 41
Oregon Freshwater Wetland Assessment Methodology
West Linn - �
' Cascade Springs Pond Creek
r39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed. easily.
b. Permanent blockage to the flow e�cists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
b. Na
Public access to wetland site (select an appropriate a�ea
ta observe the wetland to answer these questions.)
41.
Is the wedand site open to the public for direct access or
observation?
a. Yes, the wedand is open to the public.
b. Yes, but wetland access is allowed only by pernaission of
the landowner or managing entity.
c. No, access is not allowed.
r42. Are there visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contanninated water,)
a, No.
� b. One or two visible safety hazazds exist (describe).
c, More than two visible safety hazards exist (describe).
r43. Are there other natural landscape features, such as a siream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List rype and extent.)
b. No.
�'�-flt -�-o Z
�r4-� - - -� � 5 - a l
Wetland I Wetland 2 Wetland 3
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42 Speciat interest & characterizcrtion
Oregon Freshwater Wetland Assessment Methodology
We�t Linn - �
� .
Cascade Springs Pond Cree�€
r44.Is there e�sting physical puhlic access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't e�st and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
�45. Does it appeaz that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
r46. Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the azea is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an un�naintained access point exists (deseribe).
c. No access point exists, or the access point is hazardous.
Recrea tion
r47. Is the wetland accessible by boat?
a. Boat launching areas or access points exist on site or within
1/2 mile on a connected lake, river, bay or other body of
water.�
b. Potential to develop boat launching areas or aceess points
exists, or such features are more than 1/2 mile but less than
1 mile from the wefland.
c. No boat launching azeas or access points exist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
�
��'-or ���2.
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Special inferest & characferization 43
Wetland I Wetland 2 Wetland 3
Oregon Freshwater Wetland Assessment Methododogy
West Linn - �
Cascade Springs Pond Creek
r48. Are there trails, viewing azeas or other structures that guide user
movement to a particulaz area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing azeas exist.
b. Yes, undevelaped trails or viewing azeas exist that do not
disrupt wildlife or plant habitat.
c. No trails.or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife office.)
Answer "not applicable" if question 18 wa.s answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either a11 or part of the yeaz).
b. No.
c. Not applicable:
50. Is hunti.ng allowed at the wetland? (If the wetland is within the
ciry lirnits, hunting is not allowed. Otherwise, cantact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either all or part of the year).
' b. No.
Aesthetics
r51. For rural areas, what is the extent of. visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant cantrast with surrounding landscape.
b. Limited contrast with surrounding landscape.
� c. Little or no contrast with surrounding landscape.
r52. For urban areas, what is the visual character of the surrounding
azea? (See Figure 7.)
a. Open space ar naturally landscaped areas.
b. Areas landscaped or manipulated by people.
c. Developed with no landscaping.
r53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland?
a. Yes.
b. No.
�54. if the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
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E,��+,� A . �.
Wetland 1 Wetland 2
Cs- d' �.� � �
Wetland 3
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44 Special interest 8c characterization
Oregon Freshwater Wetland Assessment Methodology
��
West Liru� - �-flt � �
FE �
� .
�
Cascade Springs Pond Creek
Locate the primary viewiag area(s) for the following faur ques-
tians (be snre to indicate the location on the overlay).
�55. What odors are present at the prunary viewzng location(s)?
a. Narival, pleasant odors only.
b. Ungleasant odors such as automobile exhaust or stencl�
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
°�'�"-�`^�- C 5 -� t
Wetland 1 Wettand 2 Wetland 3��
��5:�' � t�-e�`{ r �,�.�'
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e�..- � �'-
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Special interest � ��+�•���A.:�-�:-- -"
Figure 6. Visual contras�
The top pan of the, figure shows a wetland with significant visual contrast with the
surrounding tandscape. The bottom part shows a wetland with little or no visual
conirast with the surrounding tandscape.
Oregon Freshwater Wetland Assessmerzt Methodology
West Linn - - ���s`s�
Cascade Springs Pond Creek
.�56. What noises are audible at the primary viewing location(s)?
a. Bird and wildlife noises and other naturally occumng
sounds.
b. Some traffic and other similar background sounds are
audible in addition to naturally occurring sounds.
c. Continuous traffic or other intrusive noise is audible in
addifion to naturally occurring sounds.
d. Continuous trafFic or other intrusive noise is audible, but no
naturally occurring sounds are.
r57. Haw much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50%.
b. Between 25% and 50%.
c. Less than 25�/0.
�58. How many Cowardin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
��i T�
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Wetland I Wetland 2
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Wetland 3 ��� t
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46 Special interest & charact�rization
F�aure 7. Visual chacacter of urban wetlands.
7ning with the [eft part, this figure shows an urban wetland with naturafly
scaped areas, areas landscaped by peaple and with unlandscaped devel-
��d areas.
Oregon Freshwater Wetland Assessment Methadology
�tershed identification � � � Cfd/� C��� d�
Wetland Characteriza tion (Page 5 of 19)
Individual wetland sites
Fill out this part of the characterization for each wetland in the
assessment area. Some of the information can be gathered in the
off'ice; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and relation to
surrounding landscape
� � 15. What percentage of the area within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.)
It is best to determine the land uses from a recent aerial photo. If
an aerial photo is not available, measure S00 feet in the field to
get an idea of distance to evaluate. Use the following ranges for
your answers for each land-use category:
a. Less than 20%.
b. Between 20% and 50%.
c. Greater than 50%.
1. Open Space (includes natural areas, parks and developed
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
, 4. Developed uses (residential, commercial or industrial—
rural and urban).
5. Other (list).
��16. What is the dominant eacisting land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as question 15.
, 17. What is the wetland's azea in acres? (Measure the entire azea of
contiguous wetland, not just the portion within the assessment
area. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
Questions preceded by a check nsark can be completed in the field.
�-��
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t
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118 Appendix 8
FF FK-o2 �-�-03
Wetland 1 Wetland 2 Wetland 3
Oregon Freshwater Wetland Assessment Methodology
Watershed identif'ication �Y ►�G� ��� Ut- F/Z - 6 � �-- o Z F� ro3
Wetland I Wetland 2 Wetland 3 ��
Wetland Characterization (Page 6 of 19)
a b c
-� . � '
;, , d " � i
, �� ��% i,�!, �.
r �
„i; ! ' >;,�%, i
;� c
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%; � �;
, G r / i
��;, '„
,� � , ,;,
Figure 2. Connectivity to streams, lakes and ponds.
The lightly shaded area represents a wetland, the darkly shaded area represents a
' lake or pond and the dark line represents a stream. Pan "a" shows the wetland
connected to a stream, lake or pond, part "b" shows a stream, lake or pond within
1 mile but no surface connection, and part "c" shows no stream, lake or pond within
1 mile and no surface connection.
18. How is the wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perennial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all or part of the wetland located within the 100-year flood-
plain (use floodplain maps to detemiine) or within an enclosed
basin? An enclosed basin has no inlet or outlet.
a. Yes.
b. No.
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Appendix 8 119
Oregon Freshwater Wetland Assessment Methodology
itershed identification �� f��� e C�, �
Wetland Characteriza tion (Page 7 of 19)
20. What percentage of the area within 500 feet of the wetland' s edge
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20% and 50°l0
c. Greater than 50%.
1. Open Space (includes natural areas, parks and developed
recreation areas, but not lands zoned for Exclusive Forest
Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial, indnstriat).
5. Other (list).
Wetland habitar t
�21. What percentage of the wetland's area is covered by the follow-
ing Cowardin wetland classes? ( Cowazdin wetland classes refer
to a classif'ication of wetland type by vegetation cover. See
Appendix D.) Only list those that compose 10% or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. Use the following categories for your answers:
a. Between 70% and 100%.
b. 50% or more, but less than 70°Io.
c. 20% or more, but less than 50%.
d. 10% or more, but less than 20%.
1. Open water (deep water habitat, greater than or equal to
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants
that can tolerate fiooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet tall).
4. Forested (woody vegetation 20 feet or taller).
—
��� - o i
Wetland I
F2 - 0 2 F2 - r� 3 �2-�
Wetland 2 Wetland 3
GL �4 - I �''�
f
, � �
�22. For urban areas, how many wetland plant species are present?
(You need not list the species name.) �
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant sgecies (monotypic).
Gt.. I a-
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�
120 Appendix B
Oregan Freshwater Weiland Assessment Methodology
Watershed identification ��G� t e C-� .
Wetland Characteriza tion (Page 8 of 19)
�23. What is the dominant wetland vegetation cover type?
a. Woody vegetation (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
r24. Refer to the diagzams in Figure 3 and select the one that most
closely resembles the interspersion of Cowardin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two wetland
classes and a simple pattern have low interspersion. Wetland and
upland complexes that have at least two wetland classes and a
complex pattem have a modezate interspersion pattern. Wetlands
with two or more wetland classes or upland inclusions wirh a
complex pattern and lots of edge have a high interspersion pattern.
If the wedand you are observing dces not reflect any of the diagranLS,
use the above guidance to determine the comple�city of the intersper-
sion pattern and draw a sketch of the wetland.
a. High.
b, Moderate.
c. Low.
High Interspersion (a)
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h
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Moderate Interspersion (b)
,
yi
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ii
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Low Interspersion (c)
Figure 3. Interspersion of Cowardin classes and upland inclusions.
�;"C -oZ F� -03 dt�
Wetland Z Wetland 3
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Appendix B 121
Oregon Freshwater Wetland Assessment Methodology
atershed identification �r�`f� �-, e- �'
Wetiand Characterization (Page 9 of 19)
r25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. Actively farmed
lands are not considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
�26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure 5.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area within 1 SO feet of the wetland; the "woodland"
and "brush" areas are upland habitat; and the lines perpendicular to the wetland
edge indicate where the upland habitat adjacent to the wetland habitat is at least 1 SO
st wide. The dark lines (ponions of the wetland bordered by upland habitat at least
�0 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
rrimeten
�'�-61 1=�-e2_ ��'-�3 ��..�
Wetland I Wetland 2 Wetlared 3
GL Gc- �
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122 Appendix 8
Oregon Freshwater Wetland Assessment Methodology
Watershed identif'icarion �t �� i�- �K �
Wetland Characteriza tion (Page 10 of 19)
27. How is the wetland connected to other wetlands? (Look at an
aeriat photo or map to determine this.)
a. Connected to other wetlands within a 3-mile radius by a
perennial or internuttent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lie within a 3-mile radius.
��-DI
Wetland 1
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Wetland 2
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Wetland 3
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28. Estimate the azea of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c, Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Qaestioa 2�.
The dashed line delineates the area within 25 feet of the wetland; the vegetative
buffer areas are labeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative buffer adjacent to the wetland habitat is at least 25 feet
wide. The dark lines (portions of the wetland bordered by a vegetntive buffer at least
25 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
�
Appendix 8 123
Cf
Oregon Preshwater Wetland Assessment Methodology
�tershed identification �' ��i� lCG G��.
F�-a�
Wetlaad I
�f�� aZ
Wetland 2
�=� 0 3
Wetland 3
Dt-�
Wetland Characterization (Page 11 of 19)
Fisheries habita t
29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species aze�present at some time GL
during Che year.
b. Species not covered in "a" are present at some time during
the year. '
c. No species are present at any time during the year.
Streams connected to the wetland
Connplete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
r30. What is the physical character of the stream channel? To observe
stream channei modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channel.
b. Only portions of the stream aze modified.
c. The stream is extensively modified or confined in a non-
vegetated channel or pipe.
�3I . What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between 50 and 75%.
c. 25% or more, but less than 50%.
d. Less than 25%.
�32. What percentage of the stream contains instream structures such
as large woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
�C7�C@S O� pOnC�S (entire lake or pond and wetland complex)
Complete this section only if the wetland being assessed has a surface
water connection to a lake or pond.
33. Does the lake or pond contain azeas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
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-�124 Appendix B
Oregon Freshwater Wetland Assessment Methodology
Watershed identification ��''�'�� °�" ��L
�=�-o�
Wetland I
T�-- aZ
Wetland 2
r�`43
Wetland 3
�✓4
Wetland Characteriza tion (Page 12 of 19)
r34. Whatpercentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a. 60% or more.
b. 20% or more, but less than 60%.
c. Less than 20%.
r35. What percentage of the wedand complex contains cover objects
such as submerged logs, floating or submerged vegetation,lazge
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
Wet/and hydrology
36. What is the wetland's primary source of water? (Detemune in
the field or in the office. This may be difficult to deternune. If a
surface water connection exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to detennine or not applicable.
c. No.
r38. Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions stow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
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Appendix 8 125
Oregon Freshwater Wetland Assessment Methodology
�tershed identification �+ �G�i `�% C��
Wetland Characteriza tion (Page 13 of 19)
�39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
b. No.
Public access to wet/and site (select an appropriate area
to observe the wetland to answer these questions.)
, Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b. Yes, but wetland access is allowed only by permission of
the landowner or managing entity.
c. No, access is not allowed.
�42. Are ther� visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
" sidewalk exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safety hazazds exist (describe).
c. More than two visible safety hazards exist (describe).
�43. Are there other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent.)
b. No.
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126 Appendix B
Oregon Freshwater Wetland Assessment Methodology
Watershed identif'ication �►`� �G � r� ck
Wetland Characteriza tion (Page 14 of 19)
r44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats e�sts or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
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Wetland 2 Wetland 3
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�45. Does it appeaz that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
r46. Is there a public access point within 250 feet of the wetland's
edge? Access points include pazking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the azea is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recrea tion
�47. Is the wetland accessible by boat?
a. Boat launching azeas or access points exist on site or within
1/2 mile on a connected lake, river, bay or other body of
water.
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points exist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
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Appendix B 127
Oregon Freshwater Wetland Assessment Methodology
�ershed ident�cation �'�' ��� �` 0 e- G ��
Wetland Characterization (Page 17 of 19)
�48. Are there trails, viewing areas or other structures that guide user
movement to a particulaz area or areas in or around the wetland?
a. Yes, developed or maintained �ails or viewing azeas exist.
b. Yes, undeveloped trails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat. ,
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife o�ce.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either all or part of the year).
b. No.
c. Not applicable.
50. Is hunting allowed at the wetland? (If the wetland is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either all or part of the year).
b. No.
Aesthetics
r51. For rural areas, what is the extent of visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with surrounding landscape.
c. Little or no contrast with surrounding landscape.
�52. For urban areas, what is the visual chazacter of the sunounding
area? (See Figure 7.)
a. Open space or naturally landscaped azeas.
b. Areas landscaped or manipulated by people.
c. Developed with no landscaping.
�53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland?
a. Yes.
b. No.
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128 Appendix 8
Oregon Freshwater Wetland Assessment Methodology
Watershed identification I 1 G� '� C-��-
Wetland Characteriza tion (Page 18 of 19)
r54. If the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay). �
�55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
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Appendix 8 129
Figure 6. Visual contras�
The top part of the figure shows a wetland with signi, ficant visual contrast with the
surrounding landscape. The bottom pan shows a wetland with little or no visual
contrast with the surrounding landscape.
aregon Freshwater Wetland Assessrnent Methodology
atershed identification �� � �� "'�- `--� •
Wetland Characterization (Page 19 of i9)
r56. What noises are audible at the primary viewing location(s)?
a. Bird and wildtife noises and other naturally occurring
sounds.
b. Some traffic and other similar background sounds are
audible in addirion to naturally occurring sounds.
c. Continuous tr�c or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continuous haffic or other intnzsive noise is audible, but no
naturally occurring sounds are.
�57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50%.
b. Between 25% and 50%.
c. Less than 25%.
r58. How many Cowazdin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
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130 Appendix B
Figure 7. Visual character of urban wetlands.
, �ginning with the left part, this figure shows an urban iverland with narurally
zdscaped areas, areas landscaped by people and with unlandscaped devel-
ed areas.
Oregon Freshwater Wetland Assessment Methodology
West Linn - '
Tanner Creek
Individual wetland sites
Fill out this part of the characterization for each wetland in the
assessment area. Some of the information can be gathered in the
office; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and rela tion to
surrounding landscape
� 15. What percentage of the area within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the �eld.)
It is best to deternune the land uses from a recent aerial photo. If
an aerial photo is not available, measure 500 feet in the field to
get an idea of distance to evaluate. Use the following ranges for
your answers for each land-use category:
a. Less than 20°Io.
b. Between 20% and 50%.
c. Greater than 50%.
l. Open Space (includes natural areas, parks and developed �
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchards, range land). -���
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial or industrial— -
rural and urban).
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r16. What is the dominant existing land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as questian 15.
17. What is the wetland's area in acres? (Measure the entire area of
c�ntiguous wetland, not just the portion within the assessment
azea. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
L ,7uestions preceded by a check mark can be completed in the feld.
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34 Special inferest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - '
� Tanner Creek
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. i MILE . 1 MILE . 1 MILE
Figure 2. Connectivity to streams, lakes and ponds.
The [ightly shaded area represenis a wetland, the darkly shaded area represents a
lake or pond and the dark line represents a stream. Part "a" shows the wetland
connected to a stream, lake or pond, part "b" shows a stream, lake or pond within
1 mile but no surface connection, and pan "c" shows rzo stream, lake or pond within
� 1 rnile and no surface connection.
18. How is the wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perenn'ial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is ail or part of the wetland located within the 100-yeaz floodplain
(use floodplain maps to determine) or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. Yes.
b. No.
Special interest & characterization 35
%A-ol TA'dz- 7'A-
Wetland I Wetlnnd 2 Wetland 3 �T/4�b5
Oregon Freshwater Wetland Assessment Methodology
West Linn -
Tanner Creek
20. What percentage of the area within 500 feet of the wetland
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20�10 and 50%
c. Greater than 50°Io.
1. Open Space (includes natural areas, parks and develo�
recreation areas, but not lands zoned for Exclusive Fo
Use).
2. Agriculture (pasture, cropped lands, orchards, range 1�
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial, industrial).
5. Other (list).
Wetland habita t
r21. What percentage of the wetland's area is covered by the f
ing Cowazdin wetland classes? ( Cowardin wetland classe
to a classification of wetland type by vegetation cove
Appendix D.) Only list those that compose 10% or more
overall wetland.
The percentages can be estimated in the �eld or from
photograghs. Use the following categories for your ansv�
a. Between 70% and 100%.
b. 50% or more, hut less than 70°!0.
c. 20°Io or more, but less than 50%.
d. 10% or more, but less than 20%.
1. Open water (deep water habitat, greater than or equal
6.6 £eet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous pl<
that can tolerate flooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet tall). _
4. Forested (woody vegetation 20 feet or taller). _.._.-..--.
�22. For urban areas, how cnany wetland plant species are p�
(You need not list the species name.) «'"�` �' :�'�' `:
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic).
r23. What is the dorxunant wetland vegetation cover type?
a. Woody vegetation (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water oniy
c. Emergent vegetation only or wet meadow.
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36 Special interest & characteri�ation
�T'A o� TA-oz - �t—�3
�' - -
WeUand I Wetland 2 Wetland 3
Oregon Freshwater Wetland Assessment Methodology
�
�
West Linn -
Tanner Creek
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowardin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a complex pattem have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
interspersion pattern. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to deternune
the complexity of the interspersion pattern and draw a sketch of
the wetland. � c �,��._� ��f�.. �.� o , � c_.'-;�_ ,
�- �
a. High.
b. Moderate.
c. Low.
High Interspersion (a)
Moderate Interspersion (b)
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Low interspersion (c)
3 �
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Figure 3. Interspersion of Cowardin classes and upland inclusions.
Special interest & characterization 37
�� �� Tf+� - 03 .
�
Oregon Freshwater Wetland Assessment Methodology
West Linn -
Tanner Creek
�25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. Actively farmed
lands are not considered wildlife habitat. (See Figure 4.}
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
r26. For urban areas: What percentage of the wetland's edge is
bardered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure 5.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10°l0.
27. How is the wetland connected to other wetlands? (Look at an
aerial photo or map to detemune this.)
a. Connected to other wetlands within a 3-mile radius by a
perennial or intermittent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lie within a 3-mile radius.
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28. Estimate the azea of unvegetated, open water within the wetland. �
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c. Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
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38 5pecial interest & charactsrizafion
Oregon Freshwater Wetland Assessment Methodology
C�
�
WeSt I..1T111 - �,.�.:�__.�_ � i•_--�
Tanner Creek
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Figure 4, Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area within I50 feet of the wetland; the "woodland"
and "brush" aseas are upland habitai; and ihe lines perpendicular to the wetland
edge indicate where the upland habitat adjacent to the wetland habitat is at least 1 SO
feet wide. The dark lines (portions of the wetland bordered by upland habitat at least
I50 feet wide) make up roughly one-third (benveen 10% and 40%) of the wetland
perimeter.
Figure 5. Percent of wetiand edge bordered by vegetative buffer
(for Questian 2�.
The dashed line delineates the area within 25 feet of the wetland; the vegetative
buffer areas are labeled "buffer"; and the lines perpendicu[ar to the wetland edge
indicate where the vegetative buffer adjacent to the wetland habitat is at least 25 feet
wide. The dark lines (ponions of the wetland bordered by a vegetative bufferat least
25 feet wide) make up roughly one-third (berween 10% and 40%) of the wetland
perimeter.
- T . ,4 --� r �--t-�-fl z -- t"�4 -- 0 3
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Special interest & characterizotion 39
Wetland 1 Wetland 2 Wetland 3 �Tf+�
Oregon Freshwater Wettand Assessment Methodology
West Linn -
Tanner Creek
Fisheries habita t.
29. Are fish present in a stream, lake or pond connected to the
wetland.
Til--��
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Wetland 1
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a. Salmon, trout or sensitive species are present at some time �..
during the year.
b. Species not covered in "a" aze present at some time during
the year.
c. No species are present at any time during the year.
Streams connected to the wet/and
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
�30. What is the physical character of the stream channel? To observe
stream channel modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channel.
b. Only portions of the stream are modified.
c. The stream is extensively modified or confined in a non-
vegetated channel or pipe.
What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75°Io.
b. Between 50 and 75%.
c. 25% or more, but less than 50°l0.
d. Less than 25%.
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r32. What percentage of the stream contains instream structures such
as large woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
�a�CGS O� pOI1CJS (entire lake or pond and werland complex)
Complete this section only if the wetland being assessed has a surface
water connection to a lake or pond.
33. Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
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40 Specia! interesf & characfQrization
Oregon Freshwarer Wetland Assessment Methodology
C
West Linn -
Tanner Creek
r34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
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a. 60% or more.
b. 20°l0 or more, but less than 60%.
c. Less than 20%.
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r35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Deternune in
the �eld or in the office. This may be difficult to determine. If a
surface water connection exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to loca] natural resource people for hints.)
a. Surface flow, including sti and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
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r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to determine or not applicable.
c. No.
�38.Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
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Special interest & characterizotion
41
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Oregon Freshwater Wetland Assessment Methodology
WCSt LII2I1 -
Tanner Creek
r39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
b. No.
Pubiic access to wetland site {select an appropriate area
to observe the wetland to answer these questions.)
41. Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b. Yes, but wetland access is allowed only by permission of
the landowner or managing entity.
c. No, access is not allowed.
�42. Are there visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safety hazards exist (describe).
c. More than two visible safety hazards exist (describe).
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r43. Are there other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List rype and extent.)
b. No.
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42 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn -
� Tnnner Creek
�44.Is there existing physical public access to features listed in
Question 43? If not, can such access be creaied easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access couId also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
r45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA reqvirements, a more thorough examination
shouid be done.)
a. Yes.
b. No. (List physical barriers.)
r46. Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
� lanes, trails and water courses. Maintained means that the area is
designated as a car ar transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
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access.
a. Yes, a maintained access point exists (describe).
b. Yes, a� unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recrea tion
r47. Is the wetland accessible by boat?
a. Boat launching azeas or access points exist on site or within
1/2 mile on a connected lake, river, bay or other body of
water.
b. Potential to develop boat launching azeas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points exist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
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Special interest & characterization 43
Oregon Freshwater Wetland Assessment Methodology
West Linn -
Tanner Creek
r48. Are there trails, viewing areas or other structures that guide user
movement to a particular area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, undeveloped trails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is �shing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife office.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either a11 or part of the yeaz).
b. No.
c. Not applicable:
50. Is hunting allowed at the wetland? (If the wetland is within the
city Iimits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either all or part of the year).
b. No.
Aesthetics
�51. For rural areas, what is the extent of visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with surrounding landscape.
c. Little or no contxast with surrounding landscape.
�52. For urban areas, what is the visuat character of the surrounding
area? (See Figure 7.)
a. Open space or naturally landscaped areas.
b. Areas landscaped or manipulated by people.
c. Developed with no landscaping.
r53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland?
a. Yes.
b. No.
�54. If the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
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4�4 Special interest & characterizcrtion
- r�--dl '7'p,oz
We�l Wet�nd 2
Oregon Freshwater Wetland Assessment Methodology
�
West Linn -
Tanner Creek
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
r55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
7N-o/ rA-flz TA- 3
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Special interest & characterization 45
Figure 6. Visual contrast.
The top pan of the figure shows a wetland with significant visual contrast with the
surraunding landscape. The bonom part shows a wetland with linle or no visual
contrast with the surrounding landscape.
Oregon Fresizwater WetIand Assessment Methodo[ogy
West Linn -
Tanner Creek
�56. What noises are audible at the primary viewing location(s)?
a. Sird and wildlife noises and other naturally occurring
sounds.
b. Some traff'ic and other similar background sounds are
audible in addition to naturally occurring sounds.
c. Continuous traffic or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continuous traffic or other intrusive noise is audibie, but no
naturally occumng sounds are.
r57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50%.
b. Between 25% and 50%.
c. Less than 25%.
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�58. How many Cowardin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.) �
a. More than two.
b. Two
c. One
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46 Special interest & characferizafion
Figure 7. Visual character of urban wetlands.
nning with the left part, this fgure shows an urban wetland with naturally
scaped areas, areas landscaped by people and wfth unlandscaped devel-
_d areas.
�Oregorz Fresltwater Wetland Assessment Methodology
�f� n.1 N � Gle ��-
lndividual wet/and sites
Fill out this part of the characterization for each wetland in the
assessment area. Some of the information can be gathered in the
office; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
o�ce.
Wetland structure and relation to
surrounding landscape
� 15. What percentage of the area within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.)
It is best to determine the land uses from a recent aerial photo. If
an aerial photo is not available, measure 500 feet in the field to
get an idea of distance to evaluate. Use the following ranges for
your answers for each Iand-use category:
a. Less than 20%.
b. Between 20% and 50%.
c. Greater than 50%.
. Open Space (includes natural areas, parks and developed -----
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchards, range land). -
3. Exclusive Forest Use lands. -
4. Developed uses (residential, commercia] or industrial—
rural and urban).
5. Other (list).
�16. What is the dominant existing land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as question 15.
17. What is the wetland's area in acres? (Measure the entire area of
contiguous wetland, not just the portion within the assessment
area. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
i�uestions preceded by a check mark can be completed in the field.
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Wetland I Wetland 2 Wetland 3
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34 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
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a b c
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Figure 2. Connectivity to streams, lakes and ponds.
The Zightly slinded area represents a wetland, the darkly shaded area represents a
lake or pond and the dark line represenrs a stream. Part "a" shows the wetland
connected to a stream, take or pond, part "b" shows a stream, fake or pond within
1 mile but no surface connection, and part "c" shows no stream, lake or pond within
1 mile and no surface connection.
1S. How is the wetland connected to another hody of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perennial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all or part of the wetland located within the 100-year floodplain
(use floodplain maps to determine) or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. Yes.
b. No.
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Special interest & cha►racterization 35
Oregorz Fres/zwater Wetland Assessment Methodology
�
20. What percentage of the area within 500 feet of the wetland's ed�
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20% and 50°l0
c. Greater than 50%.
1. Open Space (includes natural areas, parks and developed .
recreation areas, but not lands zoned for Exclusive Forest
Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial, industrial). —_-
5. Other (list).
Wetland habitat
r21. What percentage of the wetland's area is covered by the follo�
ing Cowardin wetland classes? ( Cowardin wetland classes ref
to a classification of wetland type by vegetation cover. S�
Appendix D.) Only list those that compose 10% or more of t]
overall wetland.
The percentages can be estimated in the field or from aeri
photographs. Use the following categories for your answers:
a. Between 70% and 100�Io.
b. 50% or more, but less than 70%.
c. 20% or more, but less than 50%.
d. 10% or more, but less than 20%.
1. Open water (deep water habitat, greater than or equal to �
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants
that can tolerate flooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet tall). °---
4. Forested (woody vegetation 20 feet or taller). --.---- __
r22. For urban areas, how many wetland plant species are presen
(You need not list the species name.)
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic).
r23. What is the dominant wetland vegetation cover type?
a. Woody vegetation (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
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36 Special interest & characterization
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Wetland 1 WeUand 2 Wetland 3
Oregon Freshwater•.Wetland Assessment Methodology
��
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowardin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a complex pattern have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
interspersion pattern. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to deterinine
the complexity of the interspersion pattern and draw a sketch of
the wetland.
a. High.
b. Moderate.
c. Low.
. .- .
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Figure 3. Interspersion of Cowardin classes and upland inclusians.
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Wetland 1 Wetland 2 Wettand 3
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Special interest & choracterization 37
Oregora Freshwater Wetland Assessment Methodology
/,"
r25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. Actively farmed
lands are not considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
r26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure 5.)
a. Greater than 40%.
b. Between 10% and 40°l0.
c. Less than 10%.
27. How is the wetland connected to other wetlands? (Look at an
aeria� photo or map to determine this.)
a. Connected to other wetlands within a 3-mile radius by a
perennial or intermittent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lie within a 3-mile radius.
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28. Estimate the area of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
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c. Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
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38 Special interest & characterization
Orego�i Freshwater Wetland Assessment Medlodology
Wetland 1 Wetland 2 Wetland 3
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area within I50 feet of the wetland; the "woodland "
and "brush" areas are upland habitat; and the lines perpendicular to the wetland
edge indicate where the uptand habitatadjacent to the wetland Itabitat is at least I50
feet wide. The dark lines (portions of the wet[and bordered by upland habitat at least
l50 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 26).
The dashed iine delineates the area within 25 feet of the wetland; the vegetative
buffer areas are labeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative bufferadjacent to the wetland habitat is at least 25 feet
wide. The dark tines (portions of the wetland bordered by a vegetative buffer at least
25 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
Special interest & characterizafion 39
Oregon Fres/twater Wetland Assessment Methodology
! r '
Fisheries habitat
29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species are present at some time
during the year.
b. Species not covered in "a" are present at some time during
the year.
c. No species are present at any time during the year.
Streams connected to the wetland
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
r30. What is the physical character of the stream channel? To observe
stream channel modifications, look for built rock banks, cement
sides> straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channel.
b: Only� portions of the stream are modified.
c. The stream is extensively modified or confined in a non-
vegetated channel or pipe.
r31. What percenta�e of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75°Io.
b. Between 50 and 75%.
c. 25% or more, but less than 50%.
d. Less than 25%. �
r32. What percentage of the stream contains instream structures such
as large woody debris, floating ar submerged vegetation, large
rocks or boulders?
a. Greater than 25%. .
b. Between 10% and 25°Io.
c. Less than 10%.
�C7/CES OI' pOnCIS (entire lake or pond and wetland complex}
Complete this secrion only if the wetland being assessed has a surface
water connection to a lake or pond.
33. Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
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40 Special interest & characterizafion
Oregon Freshwater Wetland Assessment Methodologv
/ 7
✓34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a. 60% or more.
b. 20% or more, but less than 60%.
c. Less than 20%.
�35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Determine in
the field or in the office. This may be difficult to determine. If a
surface water connection exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to determine or not applicable.
c. No.
r38. Is water flow out of the, wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
S �0 7 �% �'
Wetland 1 Wetland 2 Wetland 3 ►
. �
� �
C.� �. �.- Us
,-��.�.� �„ � �.
.-� '� `' I
;
e�?:�.,- f� r� �.
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i
C.�,
Special interest & characterization 41
Oregvn Freshwater Wetland Assessment Methodology
��
r39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
b. No.
pt1b�lC pCC2SS f0 W@t�pllC� 5%t@ {select an appropriate area
to observe the wetland to answer these quesrions.)
41. Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b. Yes, but wetland access is allowed only by permission of
the landowner or managing entity.
c. No, access is not allowed.
r42. Are there visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewallc exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safety hazards exist (describe).
c. More than two visible safeiy hazards exist (describe).
r�' 3. Are there other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent.)
b. No.
S� 4 �
Wetland 1 Wetland 2 Wetland 3
a.. N��. N�f�.
`
G�....
�� � �
� �� � �
�v �:� - ����.',
�
�,--��.r��-�
�
C3—,�- C-�.— �-
f��"�
��R �t!" �..�.�._.`°�°
����� �
�
Sf' `,
� � �.'..�
�� ��:.�.
�
� .. �,.
,
�
;
� �� J �
��' �" 6�
,� s
,� {�:�:�� . �
;
��.., � �'='.,�.
� .�
�' �.. .*. � s
LL; C-� ti
t
�
42 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
�
�44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists ar can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
r45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barners.)
�46.Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the area is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recreation
r47. Is the wetland accessible by boat?
a. Boat launching areas or access points exist on site or within
-• 1/2 mile on a connected lake, river, bay or other body of
water.
b. Potential ta develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points exist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
� �
Wetland I Wetland 2
7 ���
Wetland 3
� � I �
�
�
�
�
,
�,;�;. : ,
re :.,� , �t�
;
C
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�ry..
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-� �.,f. t.
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"5
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Special interest & characterization 43
Oregon Freshwater Wetland Assessment Methodology
� �l
�4$. Are there trails, viewing areas or other structures that guide user
movement to a particular area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, unde��eloped trails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife office.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wettand's
area is covered by open water.
a. Yes (either all or part of the year).
b. No. �
c. Not applicable.
50. Is hunting allowed at the wetland? (If the wetland is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either all or part of the year).
b. No.
Aesthetics
r51. For rural areas, what is the extent of visual contrast with the
surrounding Iandscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with surrounding landscape.
c. Little or no contrast with surrounding landscape.
r52. For urban areas, what is the visual character of the surrounding
area? (See Figure 7.)
a. Open space or naturally landscaped areas.
b. Areas landscaped or manipulated by people.
c. Developed with no landscaping.
r53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland? �
a. Yes.
b. No.
r54. If the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
b �P �
Wetland 1 Wetland 2 Wetland 3
G � `�-
�
� � �..
� � �
�
i
�
� �
� ��
,
� �
d�-��� f ��
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X L�
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�
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1
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44 Special interesf & characterization
4regon Freshwater Wetland Assessment Meti:odology
l�
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
�55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
S
Wetland 1
;�f�ic;[ W =t,���w
�f�
�
� ? Fr 9
Wetland 2 Wetland 3 �
�
' „-� ��z �c�.Nr.
� r ;��,.. .,..,-�I �h� d � � �,, L,,,V
,, r-,,:§: g �.� �
��, �,�, . �..... ` O�
Specia► inferest & characterization 45
Figure 6. Visual contrast�
The top part of the figure shows a wetland with significant visual contrast with the
surrounding landscape. The bottom part shows a wetland with litile or no visual
contrast with the surrounding landscape.
Oregon Freslawater Wetland Assessment Methodology
�/6
r56. What noises are audible at the primary viewing location(s)?
a. Bird and wildlife noises and other naturally occurring
sounds.
b. Some traffic and other similar background sounds are
audible in addition to naturally occurring sounds.
c. Continuous traffic or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continuous tr�c or other intrusive noise is audible, but no
naturally occurring sounds are.
�57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50%.
b. Between 25% and 50°Io.
c. Less than 25%.
r58. How many Cowardin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
� �q �' g
Wetland I Wetland 2 Wetland 3
� � ��
�- �-- �'
�.. c- G
�
�
G
�
�
�
46 Special interest & characterization
Figure 7. Visual character of urban wetlands.
Beginning with the left part, this figure shows an urban wetland with naturally
landscaped areas, areas larcdscaped by people and with unlandscaped devel-
oped areas.
Oregon Freshwater Wetland Assessment Methodology
West Linn - Trillium Creek
Individual wetland sites
Fiil out this part of the characterization for each wetland in the
assessment area. Some of the information can be gathered in the
office; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and relation to
surrounding landscape
� 15. What percentage of the area within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.)
It is best to deternune the land uses from a recent aerial photo. If
an aerial photo is not available, measure 500 feet in the field to
get an idea of distance to evaluate. Use the following ranges for
your answers for each land-use category:
a. Less than 20°l0.
b. Between 20% and 50%.
c. Greater than 50%.
1. Open Space (includes natural areas, parks and developed
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchards, range land)
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial or industrial—
ruraland urban).
5. Other (list).
r16. What is the dominant elcisting land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as .question 15.
17. What is the wetland's azea in acres? (Measure the entire area of
contiguous wetland, not just the portion within the assessment
area. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
i ,Juestions preceded by a check mark can be completed in the field.
7'�-0� � ��'-d� ,�-o �
Wetland I Wettand 2 Wetland�
G �� ;
�
� ,
°`" b C � �
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-b > �J
�
�
�
�
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•
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34 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
C
West Linn - Trillium Creek
�-�_6� TI�'"3 /
Wetland I W etlan d 2 Wetland 3
•
k��� � �� �� � �� � s3'k G � .
�� f ��� � �
�� r �, � ����" � � �
�: � � �4.�" ¢�� t y
� ry� �..
1 � �a�"�.um ql � � �a�.'sr'�'���7��� ��� Q �� �
� �
. 1 MILE ,� . 1 MILE . � MILE
� F � , £� , ��� �
�. ,��'; '�� b ��, ,
� � � � � � � 'q� , � � � ,
,, �� � , � � � " , � � ��
, 1 MiLE . 1 MILE . � MILE
Figure 2. Connectivity to streams, lakes and ponds.
The lightly shaded area represents a wetland, the darkly shaded area represents a
lake or pond and the dark line represents a stream. Part "a" shows the wetland
connected to a stream, lake or pond, pan "b" shows a stream, lake or pond within
1 mile butno surface connection, and part "c" shows no stream, lake orpond within
1 mile and no surface connection.
18. How is the wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perenn'ial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all or part of the wetland located within the 100-year floodplain
(use floodplain maps to determine) or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. Yes.
b. No. �
�
!{
E
i
ld.� � �.._ �,.,�
b � b �
,.
i
Special interest & characterization 35
Oregon Freshwater Wetland Assessment Methodology
West ? inn - Trillium Creek
20. What percentage of the area within 500 feet of the wetland's edge
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20°Io �
b. Between 20% and 50%
c. Greater than 50%.
1
2
3
4
5
Open Space (includes natural areas, parks and developed
recreation areas, but not lands zoned for Exclusive Forest
Use).
Agriculture (pasture, cropped lands, orchards, range land).
Exclusive Forest Use lands.
Developed uses (residential, commercial, industrial).
Other (list).
Wetland habitat
�21. What percentage of the wetland's area is covered by the follow-
ing Cowardin wetland classes? ( Cowardin wetland classes refer
to a classification of wetland type by vegetation cover. See
Appendix D.) Only list those that compose 10% or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. Use the following categories for your answers:
a. Between 70°Io and 100°l0.
b. 50% or more, but less than 7.0%.
c. 20°Io ar more, but less than 50%.
d. 10% or more, but less than 20%.
1. Open water (deep water habitat, greater than or equal to --s
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants ---�
that can tolerate flooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet tall).----
4. Forested (woody vegetation 20 feet or taller).
T�-o�
� 7"e -vz.
Wetland l
�- o�
Wetland 2
��v�
Wetland 3
C �
� `�
�
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i
i �
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; � � �
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r22. For urban areas, how many wetland plant species are present?
(You need not list the species name.) ��`T"�' "` c'""�.�"�"�
a. More than 5 plant species. a-- � a-
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic). �
,.23. What,is the dominant wetland vegetation cover type? �
a. Woody vegetation (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
�....
GZ- ; ��---
�
�
�
36 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
�
West Linn - Trillium Creek
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowardin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a compl�x pattern have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
interspersion pattern. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to deternune
the complexity of the interspersion pattern and draw a sketch of
the wetland. r�_ �'' � e:{.Y.._ �_�:�, ;�� � � < <- '.-,.�.�,
�,��. `
a. High.
b. Moderate.
c. Low.
�
High Interspersion (a)
��� , �
:��
'; .
; -,.;
f-
Moderate Interspersion (b)
;
Low Interspersion (c)
I�
Figure 3. Interspersion of Coward'ut classes and upland inclnsions.
T2 --�-�3 �- cx-/
W�nd I y Wetland 2 Wetland 3
� ! � � C�
Special interest & characterization 37
Oregon Freshwater Wetland Assessment Methodology
r25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. Actively farmed
lands are not considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10°Io and 40%.
c. Less than 10%.
�26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regulazly mowed or fanned. (See Figure 5.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
27. How is the wetland connected to other wetlands? (Look at an
aerial photo or map to deternune this.)
a. Connected to other wetlands within a 3-mile radius by a
perennial or internuttent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to otfier wetlands by surface waters, and no
other unconnected wetlands lie within a 3-mile radius.
28. Estimate the area of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c. Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
TZ� � � �� - r'� -o �
We �nd l� Wetland 2
�
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L.�C- �
�
��
��
�
'771- D `�
Wetland 3
0
�
��.
��
�1
�J
�
West Linn - Trillium Creek
38 3pecial interest & characterization
Oregon Freshwater Wetland Assessment Methodology
��
West Linn - Trillium Creek
� a� '('�'-�� �-6�j
WeUarsd 1 Wetland 2 Wetlarzd 3
Woodland. ,
°� �; �
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Lg q �
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•�. ti , �
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Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area within I50 feet of the wetland; the "woodland"
and "brush" areas are upland habitat; and the lines perpendicular to the wetland
edge indicate where the upland habitat adjacent to the wetland habitat is at least I50
feet wide. The dark lines (portions of the wetland bordered by upland habitat at least
I50 feet wide) make up roughly one-third (between 10% and 40%J of the wetland
perimeter.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 26).
The dashed line delineates the area within 25 feet of the wetland; the vegetative
buffer areas are fabeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative buffer adjacent to the wetland habitat is at least 25feet
wide. The dark lines (ponions of the wetland bordered by a vegetative bufferat least
25 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
i i
I
�
I
i
, i
i
i
i �
,
`,
���
Special ir�terest & characterization 39
Oregon Freshwater Wetland Assessment Methodology
VVest Linn - Tri1lium Creek
Fisheries habita t
29. Are �sh present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species are present at some time
during the year.
b. Species not covered in "a" are present at some time during
the year.
c. No species are present at any time during the yeaz.
Streams connected to the wetland
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
�30. What is the physical character of the stream channel? To observe
strea� channel modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modi�ed portions of
the stream are returning to a natural channel.
b. Only portions of the stream are modified.
c. The stream is extensively modified or confined in a non-
vegetated channel or pipe.
. What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between 50 and 75%.
c. 25% or more, but less than 50%.
d. Less than 25%.
r32. What percentage of the stream contains instream structures such
as laxge woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
�ClrCGS O� p0►1C�5 (entire lake or pond and wefland complex)
Complete this section only if the wetland being assessed has a surface
water connection to a lake or pond.
33. Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
782� �1 'T�-o3 ;1�-c�{
Wetlan�'�� Wetland 2 Wetland 3
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f� �� � �'
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40 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - Trillium Creek
r34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a. 60% or more.
b. 2Q% or more, but less than 60%.
c. Less than 20%.
r35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Deternune in
the field or in the office. This may be difficult to determine. If a
surface water conneetion exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift ]ines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because o� storm pulses?
a. Yes (describe).
b. Unable to detemune or not applicable.
c. No.
�38.Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has anrestricted flow.
o/
0
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4
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Wetland 2
Ge-
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Wetland 3
r.�
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Special inlerest & characterization 4l
Oregon Freshwater Wetland Assessment Methodology
West Linn - Trillium Creek
�39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
6. No.
!'(/b�/C (xCCe$$ f0 wef�a/�d $jfe (select an appropriate area
to observe the wetland to answer these questions.)
41
Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b. Yes, but wetland access is allowed only by permission of
the landowner or managing entity.
c. No, access is not allowed.
r42. Are there visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safery hazards exist (describe).
c. More than two visible safety hazards exist (describe).
r43. Are there other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent,)
b. No.
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Wetland Z Wetland 2 Wetland 3
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42 Special interest & characterizafion
Oregon Freshwater Wetland Assessment Methodology
West Linn - Trillium Creek
r44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
..45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
�46. Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
� ianes, trails and water courses. Maintained means that the area is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-aff or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous
Recrea tion
r47. Is the wetland accessible by boat?
a. Boat launching areas or access points exist on site or witiun
it2 mile on a connected lake, river, bay or other body of
water.
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points eacist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
a �-�3 �.-o y
1� 'J�-d Z
Wetla�id 1 Wetland 2 Wetland 3
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Specia! interest & characterization 43
Oregon Freshwater Wetland Assessment Methodology
West Linn - T'rillium Creek
r48. Are there trails, viewing areas or other strucrures that gnide user
movement to a particular area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, undeveloped trails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife office.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either all or part of the year).
b. No.
c. Not applicable:
50. Is hunting allowed at the wetland? (If the wetland is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either all or part of the year).
b. No.
Aesthetics
�51. For rural areas, what is the extent of visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with sunounding Iandscape.
b. Limited contrast with surrounding landscape.
c. Little or no contrast with surrounding landscape.
�52. For urban areas, what is the visual character of the surrounding
azea? (See Figure 7.)
a. Open space or naturally landscaped azeas.
b. Areas landscaped or manipulated by people.
c. Developed with no landscaping.
r53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland?
a. Yes.
b. No.
�54. If the wetland contazns visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
/2 �a� 7��°3 �t�-o�
Wetland I Wetland 2 Wetland 3
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44 Special interest & charact�rization
Oregon Freshwater Wetland Assessment Methodolagy
.
►
�
West Linn - Trillium Creek
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
r55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
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Wetlrtnd 1 Wetland 2
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Special interest �C characterization
s15
r
Figure 6. Visual contras�
The top part of the figure shows a wetland with significant visual contrast with the
surrounding landscape. The bottom part shows a wetland with little or no visual
contrast with the surrounding landscape.
Oregon Freshwater Wetland Assessment Methodology
West Linn - Trillium Creek
r56. What noises are audible at the primary viewing location(s}?
a. Bird and wildlife noises and other naturally occurring
sounds.
b. Some traffic and other similar background sounds are
audible in addition to naturally occurring sounds.
c. Continuous traffic or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continuous ir�c or other intrusive noise is audible, but no
naturally occurring sounds aze.
�57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50%.
b. Between 25% and 50%.
c. Less than 25%.
r58. How many Cowardin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.}
a. More than two.
b. Two
c. One
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Wetlan�l Wetland 2
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Wetland 3
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46 Speciai inter$st & characterization
T"�ure 7. Visual character of urban wetlands.
nning with the teft part, this figure shows an urban wertand with naturally
'scaped areas, areas landscaped by people and with unlandscaped devel-
.:d areas.
Oregon Freshwater Wetland Assessment Methodology
West Linn - Tualatin River
lndividual wetland si�es
FiII out this part of the characterization for each wetland in the
assessment area, Some of the information can be gathered in the
office; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and relation to
surrounding /andscape
.-15. What percentage of the area within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.)
It is best to deternune the land uses from a recent aerial photo. If
an aerial photo is not available, measure 500 feet in the field to
get an idea of distance to evaluate. Use the foIlowing ranges for
your answers for each land-use category:
a. Less than 20%.
b. Between 20% and 50%.
c. Greater than SO%.
1. Open Space (includes natural areas, parks and developed =� '
recreation areas, but not land designated for Exclusive '
Forest Use). ,
2. Agriculture (pasture, cropped lands, orchazds, range land)- I
3. Exclusive Forest Use lands. ----.:.Y;�. I
4. Developed uses (residential, commercial or industrial— ----_��
rural and urban).
5. Other (list).
r16. What is the dominant existing land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as .question 15.
17. What is the wefland's area in acres? (Measure the entire area of
contiguous wetland, not just the portion within the assessment
area. Use the climensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
Questions preceded by a check mark can be completed in the field.
�"y- �- o�. 7
Wetland l Wetland 2 Wetland 3
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34 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
►
West Linn - 'Tualatin River
�z!- a � l�C' °.z 71!' �3
Wetland I Wetland 2 Wetland 3
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G46
_ 1 MILE . 1 MILE . 1 MILE
Figure 2. Connectivity to streams, lakes and ponds.
The lightly shaded area represents a wetland, the darkly shaded area represents a
lake or pond and the dark line represents a stream. Part "a" shows the wetland
connected to a stream, lake or pond, pert "b" shows a stream, lake or pond within
1 mile but no surface connection, and part "c" shows no stream, lake or pond within
1 mile and no surface connection.
18. How is the wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perenn'ial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all or part of the wetland located within the 100-year floodplain
(use floodplain maps to deternune) or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. Yes.
b. No.
Q � C<--
C.�. �
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Special interest & characterization 35
Oregon Freshwater Wetland Assessment Methodology
2Q. What percentage of the area within 500 feet of the wetland's edge
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20% and 50%
c. Greater than 50%.
1
2
3
4
5
Vb'est Linn - Tualatin River
Open Space (includes natural areas, parks and developed �
recreation areas, but not lands zoned for Exclusive Forest
Use).
Agriculture (pasture, cropped lands, orchards, range land). �
Exclusive Forest Use Iands. �
Developed uses (residential, commercial, industrial). �
Other (list).
Wetland habita t
�21. What percentage of the wetland's area is covered by the follow-
ing Cowardin wetland classes? ( Cowardin wetland classes refer
to a classification of wetland type by vegetation cover. See
Appendix D.) Only list those that compose 10% or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. Use the following categories for your answers:
a. Between 70°Io and 100%.
b. 50% or more, but less than 70%.
c. 20% or more, but less than 50%.
c3. i0% or more, but less than 20%.
l. Open water (deep water habitat, greater than or equal to -----;
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants�----�
that can tolerate flooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet tall) --_—%
4. Forested (woody vegetation 20 feet or taller). �
Tcl-o i Tu-o�z
Wetland 1 Wetland 2
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Wetland 3
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�22. Por urban azeas, how many wetland plant species are present?
(You need not list the species name.) �� °"'"' J'�`�; c �'`"""'' T'"�-' �"'
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic).
�23. What is the dominant wetland vegetation cover type? b
a. Woody vegetation (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
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36 Special inferest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - Taalatin River
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowazdin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a complex pattern have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
interspersion pattern. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to determine
the complexity of the interspersion pattern and draw a sketch of
the wetland. (�._ � �� r.�� e% f=�, °.�,a`! � �:�-: G. �. �.�r.�`
a. High.
b. Moderate.
c. Low.
High Interspersion (a)
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Moderate Interspersion (b)
yz
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Low Interspersion (c)
Figure 3. Interspersion of Cowardin classes and upland inclusions.
Tcl-�:, � ll-o� 7Gl-o 3
Wetland I Wet 2 Wetland 3
� G �
Special inferest & characterization 37
Oregon Freshwater Wetland Assessment Methodology
West Linn - Tualatin River
r25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. Actively fanned
lands are not considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10°Io and 40%.
c. Less than 10%.
�26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure S.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
27. How is the wetland connected to other wetlands? (Look at an
aerial photo or map to deternune this.)
a. Connected to other wetlands within a 3-mile radius by a
perennial or internuttent stream, imgation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lie within a 3-mile radius.
��- o,
Wetland I
G�-
;.�..�
28. Estimate the area of unvegetated, open water within the wetland. �
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c. Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
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Wetland 2
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Wetland 3
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38 Special interest & characterizatior►
Oregon Freshwater Wetland Assessment Methodology
West Linn - T�alatin River
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area within I50 feet of the wetland; the "woodland"
and "brush" areas are upland habitat; and the lines perpendicular to the wettand
edge indicate where the upland habitat adjacent to the wetland habitat is at least 1 SO
feet wide. The dark lines (portions of the wetland bordered by upland habitat at least
I50 feet wide) make up roughly one-third (between IO% and 40%a) of the wetZand
perimeter.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 26).
The dashed line delineates the area within 25 feet of rhe wetland; the vegetative
buffer areas are labeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative buffer adjacent to the wetland habitat is at least 25 feet
wide. The dark lines (portions of the wetland bordered by a vegetative bufferat least
25 feet wtde) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
T(,�., a I T�,{ �o.z - y'u - o�
Wetland I Wetland 2 Wetland 3
Special interest & characterization 39
Oregon Freshwater Wetland Assessment Methodology
West Linn - Tualatin River
Fisheries habita t.
29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species are present at some time
during the year.
b. Species not covered in "a" are present at some time during
the year.
c. No species are present at any time during the year.
Streams connected to the wetland
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
r30. What is the physical character of the stream channel? To observe
stream channel modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channel.
b. Only portions of the stream are modified.
c. The stream is extensively modified or confined in a non-
vegetated channel or pipe.
What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between 50 and 75%.
c. 25% or more, but tess than 50%.
d. Less than 25%.
r32. What percentage of the stream contains instream structures such
as large woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
�C7�CeS O� pOI1C�S (entire lake or pond and wetland complex)
Complete this section only if the wetland being assessed has a surface
water connection to a lake or pond.
33. Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
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40 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - Tunlatin River
r34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
�- o )
Wetland I
�-o,�:
Wetland 2
T�u-o�
Wetland 3
a. 60% or more.
b. 20% or more, but less than 60%.
c. Less than 20%.
r35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
INet/and hydrology
36. What is the wetland's primary source of water? (Determine in
the �eld or in the office. This may be difficult to determine. If a
surface water connectian exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to determine or not applicable.
c. No.
r38.Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
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Special interest & characterization 41
Oregon Freshwater Wetland Assessment Methodology
West Linn - Tualatin River
r39. If the primary source of water is surface flow, is the water flow
'vnto the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists bnt may be breached
or a new flow channel created (engineering or earth moving
solution). _
�c. Flow is restricted and cannot be restored.
40. Has the streacn flow or stream bank been modi�ed by human
activities less than 1 mile above the wetland? Modif'ications
include dams, channelizations and levees, and confinement of the
streaxn in a pipe.
a. Yes.
b. Na
Public access to wetland site (select an appmpriate area
to observe the wetland to answer these questions, j
41. Is the wedand site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
_ b: Yes, but wetland access is allowed only by permission of
the landowrier or managing entity.
c. No, access is not allowed.
r42. Are there visible hazards to the public at the wetiand site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safety hazards exist (describe).
c. More than two visible safery hazards exist (describe).
r43. Are there other naturallandscape features, such as a stream; lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent.)
b. No.
7'l�-a� - Tt,c -o�.
Wetland I Wetland 2
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42 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - TuAlatin River
r44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond ar
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made frorn the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
r45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
,.46.Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the area is
designated as a caz or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recrea tion
r47. Is the wetland accessible by boat?
a. Boat launching azeas or access points exist on site or within
1/2 mile on a connected lake, river, bay or other body of
water.
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching azeas or access points exist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
TC(—o � jLt - o�
Wetland I Wetland 2
I
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L1
�
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Wetland 3
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Special interest & characterization 43
Oregon Freshwater Wetland Assessment Methodology
West Linn - T«alatin River
�48. Are there trails, viewing areas or other structures that guide user
movement to a particular area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, undeveloped trails or viewing areas exist that do not
disrupt wildlife or piant habitat.
c. No trails or viewing areas exist, or those that do disrupe
wildlife or plant habitat.
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife of�ice.)
Answer "not applicable" if questian 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wettand's
area is covered by open water.
a. Yes (either all or part of the year).
b. No.
c. Not appficable:
50. Is hunting aliowed at the wetland? (If the wetland is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife off'ice for this informa-
tion.)
a. Yes (either all or part of the year).
b. No.
Aesthetics
r51. For rural areas, what is the extent of visual con� with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with sunounding landscape.
c. Little or no contrast with sunounding landscape.
Ttt-o/ T�-o� ru- o�
Wetland I Wetland 2 Wetland 3
a-' i � I �
�
,
r52. For urban areas, what is the visual character of the surrounding �
area? (See Figure 7.)
a. Open space or naturally landscaped areas.
b. Areas Iandscaped or manipulated by people.
c. Developed with no landscaping.
�53. Are there visual detractors at the wetland site such as abandoned �
cars, litter, shopping carts or other objects that distract the viewer
from the wetland?
a. Yes.
b. No.
�54. If the wetland contains visual detractors, as indicated in question ���
53, can they be removed easily?
a. Yes.
b. No.
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44 Special interest & charcrcferization
Oregon Freshwater Wetland Assessment Methodology
West Linn - Tualatin 12iver
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
r55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
-� o/ Tll a�. TU
Wetland I Wetland 2 Wetland 3
� � Ctr�^r-�''l �.�,fct� SLN'"�-f jy� �td-A.{ ,
� t ��.t�!'� I
�� W �'" � �� • d"�`'�' �' .�� k..
�,.C�=
� � �
Special interest & characterization 45
Figure 6. Visual contrast.
The top part of the figure shows a wetland with significant visual contrast with the
surrounding landscape. The bottom pan shows a wetland with linle or no visual
contrast with the surrounding Zandscape.
Oregon Freshwater Wetland Assessment Methodology
West Linn - Tualatin River
,�56. What noises are audible at the primary viewing location(s)?
a. Bird and wildlife noises and other naturally occurring
sounds.
b. Some traff�ic and other similar background sounds are
audible in addition to naturally occumng sounds.
c. Continuous traffic or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continuous traffic or other intrusive noise is audible, but no
naturally occurring sounds are.
�57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50%.
b. Between 25% and 50%.
c. Less than 25%.
r58. How many Cowardin classes are visible from the primary view-
zng area(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
T'G! oi Tu-o� �-o�
Wetland 1 Wettand z Wetland 3
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46 Speciai interest & characterization
''��*ure 7. Visual character of urban wetlands.
nning with the left part, this figure shows an urban wetland with naturally
'scaped areas, areas landscaped by people and with unlandscaped devel-
_ areas.
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
Individual wetland sites
✓ �
Tu - v� - TU- os' W.� -o/ IN1-�ia �
Wetland I Wetland 2 Wetland 3
Fill out this part of the characterization for each wetland in the
assessment area. Some of the information can be gathered in the
office; some must be gathered at the site. You may want to do a rougt
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and rela tion to
surrounding landscape
r15. Whatpercentage of the area within 500 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or ir
the field.)
It is best to determine the land uses from a recent aerial photo. Ii
an aerial photo is not available, measure 500 feet in the field tc
get an idea of distance to evaluate. Use the following ranges fo�
your answers for each land-use category:
a. Less than 20%.
b. Between 20% and 50%.
c. Greater than 50°Io.
1. Open Space (includes natural areas, parks and developed
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
�,.� 3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial or industrial—
rural and urban).
� 5. Other (list).
�16. What is the dominant existing land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland i
Use the same land-use categories as .question 15.
17. What is the wetland's azea in acres? (Measure the entire area oi
contiguous wetland, not just the portion within the assessmeni
area. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
�uestions preceded by a check mark can be completed in the fzeld.
i
�
�
34 Special interesf & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
�
� , . . .
'-� � �"� �, '•� ��� ,� y �?�� , �,
a �
�� y
�� �. �' 1 , FE 4 �� � � �/y �
� ��� � ��� ��� h ��� �� � �� / /����
1 MILE � 1 MILE 1 MILE
, �� - �� ,
<� i , y�� ; .�
�S a ,x e
� y � � ; � � � � ��� � � �� , , �; ,;
, , ����'� �.. � �
�. 1 MILE '. 1 MILE '. 1 MILE
Figure 2. Connectivity to streams, lakes and ponds.
The Iightly shaded area represents a wetland, the darkly shaded area represents a
lake or pond and the dark line represents a stream. Part "a" shows the wetland
connected to a stream, lake or pond, pan "b" shows a stream, lake or pond within
1 mile but no surface connection, and part "c" shows no stream, lake or pond within
1 mile and no surface connection.
18. How is the wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perenn'ial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all or part of the wetland located within the 100-year floodplain
(use floodplain maps to determine) or.within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. Yes.
b. No.
�—o�l Tu—oS Wz— 01 ��I-!�(e
Wetland I Wetland 2 Wettand 3
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Special interest & choracterization 35
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
Ti�- o� f
Wetland I
INi-
Tu-OS �,�-o� �
Wetland 2 Wetland 3 � 4 '�.
�
20. What percentage of the area within 500 feet of the wetland's edge
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20% and 50°Io
c. Greater than 50%.
l. Open Space (includes natural areas, pazks and developed
recreation areas, but not lands zoned for Exclusive Forest
Use).
2. Agriculture (pasture, cropped lands, orchards, range land)
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial, industrial).
5. Other (list).
Wetlpnd habitpt
r21. What percentage of the wetland's azea is covered by the follow-
ing Cowazdin wetland classes? ( Cowardin wetland classes refer
to a classification of wetland type by vegetation cover. See
Apgendix D.) Only list those that compose 10% or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. Use the following categories for your answers:
a. Between 70°Io and 100°Io.
b. 50% or more, but less than 70°!0.
c. 20% or more, but less than 50%.
d. 10% or more, but less than 20%.
1. Open water (deep water habitat, greater than or equal to —�
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants --�
that can tolerate flooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet ta11). -�
4. Forested (woody vegetation 20 feet or taller).
�22. For urban areas, how many wetland plant species are present?
(You need not list the species name.) � �"'""�`
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c, 1 plant species (monotypic).
�23. What is the dominant wetland vegetation cover type?
a. Woody vegetation (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
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36 Special interest & charocterizatian
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowardin wetIand classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a complex pattern have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
interspersion pattern. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to determine
the complexity of the interspersion pattern and draw a sketch of
the wetland. ��_� ��� c__ �{---r �.��a�_ � a: t. �:1:.��,i.
a. High.
b. Moderate.
c. Low.
High Interspersion (a)
�.�
,�x<; � ,i;
,.
Moderate Interspersion (b)
�
�,
Low Interspersion (c)
Figure 3. Interspersion of Cowardin classes and upland inclusions.
w►-
Tu- 0�{ TU-o5 W L- o t j„�,-- %�
Wetland I Wetland 2 Wetland 3
G � �
Special interest & characterization 37
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
�25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. ActiveIy farmed
lands are not considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
r26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regulazly mowed or farmed. (See Figure 5.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
27. How is the wetland connected to other wetlands? (Look at an
aerial photo or map to determine this.}
a. Connected to other wetlands within a 3-mile radius by a
perennial or internuttent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other uncannected wetlands Iie within a 3-mile radius.
28. Estimate the area of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c. Between O.S acre and 1 acre.
d. Less than 0.5 acre.
�u-o� 7-u-os
Wetland I Wetland 2
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Wetland 3
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38 Special interest & chcrractQrization
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
VUoodland_ '
�',�fr �/� _.
, ',r;� "� :
a ;
', � -€....
� efi
� '.
�150' yy
;� ,�
�, �,
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area within 150 feet of the wetland; the "woodland"
and "brush" areas are uplarzd habitat; and the lines perpendicular to the wetland
edge indicate where the upland habiiatadjacent to the wetland habitat is at least 1 SO
feet wide. The dark lines (portions of the wetland bordered by upland habitat at least
1 SO feet wide) make up raughly one-third (between 10% and 40%) of the wetland
perimeter.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 26).
The dashed line detineates the area within 25 feet of rhe wetland; the vegetative
buffer areas are labeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative buffer adjacent to the wetland habitat is ar least 25feet
wide. The dark lines (ponions of the wetland bordered by a vegetative bufferat least
25 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
f�JI o �
Wetland 3
Special interest & characterization 39
'rK�o� -�_aS
Wetland 1 Wetland 2
Oregon Freshwater Wetland Assessment Methodology
West Linn - Wittamette River
Tualatin River
Fisheries habitat
29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species are present at some ticne
during the year.
b. Species not covered in "a" are present at some time during
the year.
c. No species are present at any time during the year.
Streams connected to the wet/and
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
r30. What is the physical character of the stream channel? To observe
stream channel modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channel.
b. Only portions of the stream are modified.
c. The stream is extensively modified or confined in a non-
vegetated channel or pipe.
What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between SO and 75%.
c. 25°Io or more, but less than 50%.
d. Less than 25%.
r32. What percentage of the stream contains instream structures such
as large woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
Ld�C@S Of `30�1C�S (entire lake or pond and wetland compiex)
Complete this section only if the wetland being assessed has a surface
water connection to a Iake or pond.
33. Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
Tj,�O+� �-05
Wetla 1 Wetland 2
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40 Special interest & characterizafion
Oregon Freshwater Wetland Assessment Methodology
West Linn - �'ViIlamette River
Tualatin River
4�w o�
Wetland 1
7`Z(- oS
Wetland 2
W�ol
Wetland 3
!N � `
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..34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a. 60% or more.
b. 20% or more, but less than 60°l0.
c. Less than 20°Io.
r35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Determine in
the �eld or in the office. This may be difficult to determine. If a
surface water connection exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Ts it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to determine or not applicable.
c. No.
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�38. Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
Gt� �.
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e .�
- �1 a.",
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Special interest & characterization �1
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
r39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
b. No.
Pu��IC QCC�SS f� Wet�Qn� $lfe (se[ect an appropriate area
to observe the wetland to answer these questions. J
41. Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b. Yes, but wetland access is allowed only by permission of
the landowner or managing entity.
c. No, access is not allowed.
�42. Are there visible hazards to the public at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safery hazards exist (describe).
c. More than two visible safety hazards exist (desczibe).
r43. Are there other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent.)
b. Na
?Gt -d f Tt�- o s t� Z vr
Wetland l Wetland 2 Wetland 3
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42 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
West Linn - �'Villamette River W�_
Tualatin River �(-o�{ Tu -os l,�lZ- o� ��- �
Wetland 1 Wetland 2 Wetiand 3
�44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily,
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
�45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
r46. Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the area is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recrea tion
�47. Is the wetland accessible by boat?
a. Boat launching areas or access points exist on site or within
1/2 mile on a connected lake, river, bay or other body of
water.
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points exist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
t,'l.
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Special interest & characterization 43
Oregon Freshwater Wetland Assessment Methodology
West Linn - �Villamette River
Tuaiatin River
�48. Are there trails, viewing areas or other structures that guide user
movement to a particular area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, undeveloped trails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife office.)
Answer "not applica6le" if question I 8 was answered "b" or "c,'°
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either all or part of the year).
b. No.
c. Not applicabte:
50. Is hunting allowed at the wetland? (If the wetland is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either all or part of the year).
b. No.
Aesthetics
r51. For rural areas, what is the extent of visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with surrounding landscape.
c. Little or no contrast with surrounding landscape.
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r52. For urban areas, what is the visual character of the surrounding b
area? (See Figure 7.)
a. Open space or naturally landscaped azeas.
6. Areas tandscaped or manipuiated by people.
c. Developed with no landscaping. .
r53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer a ' �
from the wetland?
�V",�'�
a. Yes. ��
b. No.
r54. If the wetiand contains visual detractors, as indicated in question
53, can they be removed easily? �-
a. Yes.
b. No.
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44 Special interest & characterization
Oregon Freshwater Wetlarsd Assessment Methodology
West Linn - Willamette River
Tualatin River
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
r55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors onIy.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant aze present at certain times.
c. Unpleasant odors are distinct and continuously present.
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Wetland I Wetland 2
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Specia! interest & characterization 45
Figure 6. Visual contrast�
The top part of the figure shows a wetland with signifccant visual contrast with the
surrounding tandscape. The bottom pan shows a wettand with littte or no visual
contrast with the surrounding landscape.
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
Tualatin River
r56. What noises are audible at the primary viewing location(s)?
a. Bird and wildlife noises and other naturally occurring
sounds.
b. Some traff'ic and other simiiar background sounds are
audible in addition to naturally occurring sounds.
c. Continuous traffic or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continuous traf�c or other intrusive noise is audible, but no
naturally occurring sounds are.
r57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than SO�Io.
b. Between 25% and 50%.
c. Less than 25°Io.
�58. How many Cowardin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
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�6 Special interest & characterizafion
" 7. Visual character of urban wetlands.
nning with the lef7 part, this fgure shows an urban wetland with naturally
rcaped areas, areas landscaped by people and with unlandscaped devel-
. �d areas.
, Oreg^,n �F"reshw,atar Wetland Assessment Methodology
. �J
West Linn - Willamette River ,l f�l� �{ovc�
u� s- 2 W 3 �,,�z -�
�� Wetland I Wetland 2 Wetland 3 ��� �
lndividudl wetland sites
Fill out this part qf the characterization for each wetland in the
assessment area. Some of the information can be gathered in the
office; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
"Wetland structure and rela tion to
surrounding /andscape
r 15. What percentage of the area within S00 feet of the wetland's edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.)
It is best to determine the land uses from a recent aerial photo. If
an aerial photo is not available, measure 500 feet in the field to
get an idea of distance to evaluate. Use the following ranges for
your answers for ea.ch land-use category:
a. Less than 20%.
b. Between 20% and 50°Io.
c. Greater than 50%.
l. Open Space (includes natural areas, parks and developed
recreation areas, but not land designated for Exclusive
Forest Use).
2. Agriculture (pasture, cropped lands, orchazds, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial or industrial—
rural and urban).
5. Other (list).
r16. What is the dominant eacisting land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as .question 15.
17. What is the wetland's area in acres? (Measure the entire azea of
contiguous wetland, not just the portion within the assessment
azea. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
. Questions preceded by a check mark can be completed in the field.
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34 Special interest & characterization
` � Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
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.
a b c
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Figure 2. Connectivity to streams, lakes and ponds.
The lightly shaded area represents a wetland, the darkly shaded area represents a
lake or pond and the dark line represents a stream. Part "a" shows the wetland
connected to a stream, lake or pond, part "b" shows a stream, lake or pond within
I mile but no surface connection, and pan "c" shows no stream, lake or pond within
1 mile and no surface connection.
18. How is the wedand connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by.a culvert, irrigation ditch, inter-
mittent stream or perennial strearn.
b. No surface-water connection exists to another body of
water, but other bodies of water lie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
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19. Is all or part of the wetland located within the 100-yeaz floodplain
(use floodplain maps to determine) or within an enclosed basin? �
An enclosed basin has no inlet or outlet.
a. Yes.
b. No.
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Special interest & choracterization
35
Oregon Freshwater Wettand Assessment Methodotogy
�Vest Linn - Willamette River
20. What percentage of the area within 500 feet of the wetiand's edge
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20% and 50°Io
c. Greater than 50%.
1. Open Space (includes natural azeas, parks and developed
recreation areas, but not lands zoned for Exclusive Forest
Use).
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial, industrial).
5. Other (list).
Wetland habita t
�21. What percentage of the wetland's area is covered by the follow-
ing Cowardin wetland classes? ( Cowazdin wetland classes refer
to a class�cation of wetland type by vegetation cover. See
Appendix D.) Only list those that compose 10°!0 or more of the
overall wetland.
The percentages can be estimated in the field or from aerial
photographs. Use the fallowing categories for your answers:
a. Between 70% and 100%.
b. 50%a or more, but less than 70%.
c. 20% or more, but less than 50%.
d. 10% or more, but less than 20%.
1. Open water (deep water habitat, greater than or equal to >
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plants --�
that can tolerate flooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet tall). --------�
4. Forested (woody vegetation 20 feet or taller). �
r22. For urban areas, how many wetland plan species aze present?
(You need not list the species name.) ��''""�'"�'" �°'`rt'"�`'';`
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic).
r23. What is the dominant wetland vegetation cover type?
a. Woody vegetation (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only ar wet meadow.
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36 Special interest & characterizotion
' Oregon Freshwater Wetland Assessment Methodology
�
West Linn - Willamette River
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Wetland 1 Wetland 2
r24. Refer to the diagrams in Figure 3 and select the one that most
closely resembles the interspersion of Cowardin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of oniy one wetland class or with two
wetland classes and a simple pattern have low interspersion. .
Wetland and upland complexes that have at least two wetland
classes and a complex patfern have a moderate interspersion
pattern. Wetlands with two or more wetland classes or upland
inclusions with a complex pattern and lots of edge have a high
interspersion pattern. If the wetland you aze abserving does not
reflect any of the diagrams, use the above guidance to determine
the complexity of the interspersion pattern and draw a sketch of
the wetland. l-�-r- � ' �
c.�..�.i �� �f.� '.Od � v�: <._ L�r,��
a. High.
b. Moderate.
c. Low.
High lnterspersion (a)
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.
Figure 3. Interspersion of Cowardin classes and upland inclusions.
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Special interest & characterization
37
s�
Oregaa F'reshwrater Wetland Assessment Methodolagy
West Linn - V�illamette River
r25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. Actively farmed
lands are not considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10°l0.
r26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure 5.)
a. Greater than 40%a.
b. Between 10% and 40%.
c. Less than 10%.
27. How is the wetland connected to other wetlands? (Look at an
aerial photo or map to determine this.)
a. Connected to other wetlands within a 3-mile radius by a
perennial ar intermittent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lie within a 3-mile radius.
28. Estimate the area of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c. Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
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38 Special interest & characterization
' Oregon Freshwater Wetland Assessment Methodology
West Linn - Wiltamette River
� W��p� Wi-v3 WT-o�
Wetland I Wetland 2 Wetland 3
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25).
The dashed line delineates the area within 150 feet of the wetland; tiie "woodland"
and "brush" areas are upland habitat; and the lines perpendicular to the wetland
edge indicate where the upland habitat adjacent to the wetland habitat is at least I50
O feet wide. The dark lines (portions of the wetland bordered by upland habitat at least
I50 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 26).
The dashed line delineates the area within 25 feet of the wetland; the vegetative
buffer areas are labeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative buffer adjacent to the wetland habitat is at least 25feet
� wide. The dark lines (ponions of the wetland bordered by a vegetative bufferat least
2S feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
Special interest & characterization 39
Oregan FreshwatQr Wetland Assessment Methodology
West Linn - Willamette River
Fisheries habita t.
29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species are present at some time
during the year.
b. Species not covered in "a" are present at some time during
the year.
c. No species are present at any time during the year.
Streams connected to the wetland
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
v30. What is the physical character of the stream channel? To observe
stream channel modifications, look for built rock banks, cement
sides, straightened azeas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channeL
b. Only portions of the stream are modified. �
c. The stream is extensively modi�ed or confined in a non-
vegetated channel or pipe.
��. What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between 50 and 75%.
c. 25% or more, but less than 50%.
d. Less than 25%.
�32. What percenta.ge of the stream contains instream structures sucn
as lazge woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
�O�C@S O� pOl1C�5 (entire lake or pond and wetland complex)
Complete this section only if the wetland being assessed has a surface
water connection to a lake or pond.
33. Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
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40 Special interest & characterization
' Oregon Freshwater Wetland Assessment tLlethodology
�
West Linn - Willamette River
Wr az GJr_ 03- �F-o�{ � ,
Wetland I Wetland 2 Wetland 3
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�34. What percentage of the shoreline is shaded at the water's edge by
forested or scrub-shrub vegetation?
a. 60% or more.
b. 20% or more, but less than 60%.
c. Less than 20%.
r35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%
b. Between 10 and 25%
c. Less than 10%
Wetiand hydrology
36. What is the wetland's primary source of water? (Determine in
the field or in the office. This may be difficult to determine. If a
surface water connection e�sts—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
�37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains on trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wetland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable ta determine or not applicable.
c. No.
✓38.Is water flow out of the wetland restricted (e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restrictions slow down the water (e.g., undersized
culvert).
c. No, the outlet has unrestricted flow.
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Special interest & characterization 41
Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
r39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but ma.y he breached
or a new flow channel created (engineering or earth moving
solution}.
c. Flow is restricted and cannot be restored.
40. Has the stream flow or stream bank been modified by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and conf'inement of the
stream in a pipe.
a. Yes.
b. No.
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Public access to wetland site (select an appropriate area
to observe the wetland to answer these questions.)
41. Is the wefland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b. Yes, but wetland access is allowed only by permission of
the landowner or managing entiry.
c. No, access is not allowed.
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r42. Are tl�ere visible hazards to the public at the wetiand site?
(Exaznples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safery hazards exist (describe).
c. More than two visible safety hazazds exist (describe}.
r43. Are theze other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent.)
b. No.
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42 Special interest & charocteriaation
�
� Oregon Freshwater Wetland Assessment Methodology
West Linn - Willamette River
r44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
�45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with limited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
r46.Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
� lanes, trails and water courses. Maintained means that the area is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe).
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the aecess point is hazardous.
Recrea tion
�
�47. Is the wetland accessible by boat?
a. Boat launching areas or access points exist on site or within
1/2 mile on a connected lake, river, bay or other body of
water.
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points e�cist within 1
mile of the wetland, and potential to develop launching
areas or access points is limited.
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Special interest & characterization 43
Oregnn F`resh►.vater Wetland Assessment Methodology
West Linn - Willamette River
r48. Are there trails, viewing areas or other structures tliat guide user
movement to a particular area or areas in or around the wetland?
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, undeveloped trails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is �shing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife off'ice.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is covered by open water.
a. Yes (either all or part of the year).
b. No.
c. Not applicable:
50. Is hunting allowed at the wetland? (If the wetland is within the
city limits, hunting is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife office for this informa-
tion.)
a. Yes (either all or part of the year).
b. Na
Aesthetics
r51. For rural areas, what is the extent of visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with surrounding landscape.
c. Little or no contrast with surrounding landscape.
�52. For urban areas, what is the visual character of the surrounding
azea? (See Figure 7.) _
a. Open space or naturally landscaped areas.
b. Areas landscaped or manipulated by people.
c. Developed with no landscaping.
�53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland?
a. Yes.
b. No.
r54. If the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. Na
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44 Special interest & characterization
. � Oregon Freshwater Wetland Assessment ltlethodology
West Linn - Willamette Itiver
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Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
r55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automabile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
.
.
Special interest & characterization 45
W.2-o� w�-v3 w
Wetland 1 Wetland 2 wet�a 3 � r �
Figure 6. Visual contras�
The top part of the figure shows a wetland with significant visual contrast with the
surrounding landscape. The bonom pan shows a wetland with little or no visual
contrast with the surrounding landscape.
Oregon FresF�water Wetland Assessment Methodology
West Linn - Witlamette River
r56. What noises are audible at the primary viewing location(s)?
a. Bird and wildlife noises and other naturally occurring
sounds.
b. Some traff'ic and other sunilar background sounds are
audible in addition to naturally occurring sounds.
c. Continuous traffic or other intrusive noise is audible in
addition to naturally occurring sounds.
. d. Continuous traffic or other intrusive noise is audible, but no
� naturaliy occumng sounds are.
�57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50°Io.
b. Between 25% and 50%.
c. Less than 25%.
r58. How many Cowardin classes are visible from the primary view-
ing azea(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
WI-oa. tJI��3 W�-�'� Y��.1 e
Wetland I Wetland 2 Wetland 3
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46 Special interest & characterization
Figure 7. Visual character of urban wetlands.
B��inning with the left part, this figure shows an urban wetland with naturally
�caped areas, areas landscaped by peopde and with unlandscaped clevel-
o�.�d areas.
Oregon Freshwater Wetland Assessment Methodology
I.��S? Li�� � 1,�1 L��4N2�1�E P t VL.
�IAAEN ���NGs
Watershed Notes
Figure 1. Watersheds as corridors for wildlife movemen�
Areas A and B are the end points of a movement corridor through the watershed.
Naturaf areas are shaded darkly, the irregu[arpotygons represent highly developed
areas, and the thick black line represents an impassable barriersuch crs an interstate
highwm>. In the first part of the illustration, the cantiguous natural area connects
both ends of the corridor. The developed area is a barrier, but it does not obstruct
species movement. The second half of the illustration shows fragmented natural
areas with an impassable barrier. If the barrier stopped at the smaller developed
area and did not continue off the lower left, species movement would still be possible.
13. Does the watershed provide a natural corridor for fish or wildlife
movement? (Observe from aerial photographs.) List whether
far fish, wildiife or both. Consider fences, dams and other
barriers to travel. Aeria1 photographs of the watershed area are
the best source of information. Fragmented systems have barriers
to movement or a section where the natura] area is broken by
developed area.
A corridor is a landscape feature that enables fish or wildlife species
to travel between broad geographicat azeas. (See Figure 1.)
a. There are contiguous natural areas that allow species
movement, and if barriers exist, they do not stop animal or
fish movernent.
b. The natural areas aze fragmented, but species movement is
still possible.
c. The habitat system is fragmented, and there are barriers to
species movement.
14. What are the landscape features at both ends of the movement
corridor? (These may lie outside the assessment area.) From an
aerial photo, observation or local knowledge, determine whether
there are large natural areas at either end of the movement
corridor. The natural area does not have to be a wetland.
a. Large natural habitat areas are at both ends.
b. One end has a natural habitat area and the other end is
developed.
c. Both ends are developed.
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Tve,��l C i2 �lG
•Oregon Freshwater Wetland Assessment Methodology
�a —t��
�v� -05 w� - ot�' �+«-A�-
Wetland 1 Wetlared 2 Wetland 3
lndividual wet/and sites
Fill out this part of the characterization for each wetland in the
assessment area. Some of the information can be gathered in the
office; some must be gathered at the site. You may want to do a rough
sketch of the site (doesn't have to be to scale) to refer to back in the
office.
Wetland structure and relation to
surrounding landscape
r15. What gercentage of the area within 500 feet of the wetland' s edge
is dedicated to the land uses listed below? (From overlay 2 or in
the field.)
It is best to determine the land uses from a recent aerial photo. If
an aerial photo is not available, measure 500 feet in the field to
get an idea of distance to evaluate. Use the following ranges for
your answers for each land-use category:
a. Less than 20%.
b. Between 20% and 50%.
c. Greater than 50%.
1. Open Space (includes natural areas, parks and developed
recreation areas, but not land designated for Exclusive
Forest Use}.
2. Agriculture (pasture, cropped lands, orchards, range land).
3. Exclusive Forest Use lands.
4. Developed uses (residential, commercial or industrial—
rural and urban).
5. Other (list). ,
�16. What is the dominant existing land use within 500 feet of the
wetland on the downstream or down-slope edge of the wetland?
Use the same land-use categories as question 15.
17. What is the wetland's area in acres? (Measure the entire area of
contiguous wetland, not just the portion within the assessment
area. Use the dimensions of the wetland as outlined on the base
map.)
a. Greater than 5 acres.
b. Between 0.5 acres and 5 acres.
c. Less than 0.5 acres.
d Questions preceded by a check mark can be completed in the field.
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Oregon Freshwater Wetland Assessment Methodology
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a b � c
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��
��� ��.� ;�
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��1 ��� �� �� F I ����� �� ��r`�. s ��� � ���� � ,
Figure 2. Connectivity to streams, lakes and ponds.
The lightty shaded area represents a wetland, the darkty shaded area represents a
lake or pond and tlie dark line represents a stream. Part "a" shows the wetland
connected to a stream, lake or pond, part "b" shows a. stream, lake or pond within
1 mile but no surface connectian, arzd part "c" shows no stream, lake or pond within
1 mile and no surface connection.
18. How is the, wetland connected to another body of water, such as
a stream, lake or pond? (See Figure 2.)
a. The wetland is connected by surface water to another body
of water. This may be by a culvert, irrigation ditch, inter-
mittent stream or perennial stream.
b. No surface-water connection exists to another body of
water, but other bodies of water tie within 1 mile of the
wetland.
c. No surface-water connection exists to another body of
water, and no other bodies of water lie within 1 mile of the
wetland.
19. Is all or parf of the wetland located within the 100-year floodplain
(use floodplain maps to deternune) or within an enclosed basin?
An enclosed basin has no inlet or outlet.
a. Yes.
b. No. .
Wettand I Wetland 2 Wetland 3
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Special interesf & characterization 35
Oregon Freshwater Wetland Assessment Methodology
}-; I—�f
W/-OS W1-p(r bal��
20. What percentage of the area witfiin 500 feet of the wetland's
is zoned for each of the land uses listed below?
Use the following ranges for your answers:
a. Less than 20%
b. Between 20% and 50%
c. Greater than 50%.
1. Open Space (incIudes natural areas, parks and deveIope�
recreation areas, but not lands zoned for Exclusive Fore
Use).
2. Agriculture (pasture, cropped lands, orchards, range lan
3. Exclusive Forest Use lands.
4. Developed uses (residential, commerciat, industria!).
5. Other (list).
Wetland habitat
�21. What percentage of the wetland's area is covered by the fol]
ing Cowardin wetland classes? ( Cowardin wetland classes i
to a classi�cation of wetland type by vegetation cover.
Appendix D.) Only list those that compose 10% or more oi
overall wetland.
The percentages can be estimated in the field or from a�
photographs. Use the following categories for your answer
a. Between 70% and 100°Io.
b. 50% or more, but less than 70%.
c. 20°l0 or more, but less than 50%.
d. 10% or more, but less than 20%.
1. ,Open water (deep water habitat, greater than or equal to
6.6 feet or 2 meters).
2. Emergent (includes floating aquatics—herbaceous plant
that can tolerate flooding and living in wet soils).
3. Scrub-shrub (woody vegetation under 20 feet tall). -�-= -
4. Forested (woody vegetation 20 feet or taller). ---
�22. For urban areas, how many wetland plant species are pres�
(You need not list the species name.)
a. More than 5 plant species.
b. Between 2 and 5 plant species.
c. 1 plant species (monotypic).
�23. What is the dominant wetland vegetation cover type?
a. Woody vegetaxion (forested and scrub-shrub).
b. Emergent vegetation and ponding, or open water only.
c. Emergent vegetation only or wet meadow.
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36 Special interest & characterization
Wetland I Wetland 2 Wetland 3
Oregon Freshwater.Wetland Assessment Methodology
✓24. Refer to the diagrams in Figure 3 and select the one that rnost
closely resembles the interspersion of Cowardin wetland classes
and, if present, upland inclusions. (An upland inclusion is an
island or an upland area surrounded on three sides by wetland.).
Wetlands composed of only one wetland class or with two
wetland classes and a simple pattern have low interspersion.
Wetland and upland complexes that have at least two wetland
classes and a complex pattern have a moderate interspersion
pattem. Wetlands with two or more wetland classes or upland
inclasions with a complex pattem and lots of edge have a high
interspersion pattern. If the wetland you are observing does not
reflect any of the diagrams, use the above guidance to determine
the complexity of the interspersion pattern and draw a sketch of
the wetland.
a. High.
b. Moderate.
c. Low.
. .- •
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,� �
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��(� ;��
Y ���;-
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Moderate Interspersion (b)
Low Interspersion (c)
;:� .
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Figure 3. Interspersion of Cowardin classes and upland inclusions.
�,,c -C6
Wetland I
�/-�/
��-o� �
Wetland 2 Wet[and 3
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Soecial interest & characterization 37
Oregon Freshwater Wetland Assessment Methodology
r25. For rural areas: What percentage of the wetland's edge is
bordered by upland wildlife habitat that is at least 150 feet wide?
Brush, woodland, non-farmed agricultural land and range land
are considered upland habitat for this question. Actively farmed
lands are not considered wildlife habitat. (See Figure 4.)
a. Greater than 40%.
b. Between 10°Io and 40%.
c. Less than 10%.
r26. For urban areas: What percentage of the wetland's edge is
bordered by a vegetative buffer at least 25 feet wide? A vegeta-
tive buffer consists of trees, bushes or vegetation that is not
regularly mowed or farmed. (See Figure 5.)
a. Greater than 40%.
b. Between 10% and 40%.
c. Less than 10%.
27. How is the wetland connected to other wetlands? (Look at an
aerial photo or map to determine this.}
a. Connected to other wetlands within a 3-mile radius by a
perennial or intermittent stream, irrigation or drainage
ditch, culvert, canal or lake.
b. Not connected by surface waters, but other unconnected
wetlands lie within a 3-mile radius.
c. Not connected to other wetlands by surface waters, and no
other unconnected wetlands lze within a 3-mile radius.
28. Estimate the area of unvegetated, open water within the wetland.
a. More than 3 acres.
b. Greater than 1 acre, up to 3 acres.
c. Between 0.5 acre and 1 acre.
d. Less than 0.5 acre.
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Wetland 1 Wetland 2 Wetland 3
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p�. GL. �
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38 S�ecial interest & characterization
Oregon Freshwater Wetland Assessment Methodology
Wetland 1 Wetland 2 Wetland 3
���n..
Figure 4. Percent of wetland edge bordered by upland habitat
(for Question 25). . �e
The dashed line delineates the area within I50 feet of the wetland; the "woodland "
and "brush" areas are upIand habitat; and the lines perpendicular to the wetland
edge indicate ivhere the upland habitat adjacent to lhe wetland habitat is at least 150
feet wide. The dark lines (portions of the wetland bordered by upland habitat at least
150 feet wide) make up roughty one-third (between 10% and 4D%) of the wetland
perimeter.
',
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Figure 5. Percent of wetland edge bordered by vegetative buffer
(for Question 26).
The dashed line delineates the area within 25 feet of the wetland; the vegetative
bufferareas are labeled "buffer"; and the lines perpendicular to the wetland edge
indicate where the vegetative bufferadjacent to the wetland habitat is at least 25 feet
wide. The dark tines (portions of the wetland bordered by a vegetarive bufferar least
25 feet wide) make up roughly one-third (between 10% and 40%) of the wetland
perimeter.
Special interest & chcrracterizafiion 39
Oregon Fr eshwater Wetland Assessment Methodology
Fisheries habitat
29. Are fish present in a stream, lake or pond connected to the
wetland.
a. Salmon, trout or sensitive species are present at some time
during the year.
b. Species not covered in "a" are present at some time during
the year.
c. No species axe present at any time during the year.
Streams connected to fhe wetland
Complete this section only if the wetland being assessed has an
unimpeded surface water connection to a stream.
r30. What is the physical character of the stream channel? To observe
stream channel modifications, look for built rock banks, cement
sides, straightened areas or other human-created features.
a. The stream is in a natural channel, or modified portions of
the stream are returning to a natural channel.
b. Only portions of the stream are modified.
c. The stream is extensively modified or co�ned in a non-
vegetated channel or pipe.
r31. What percentage of the stream is shaded by streamside (riparian)
vegetation?
a. Greater than 75%.
b. Between 50 and 75%.
c. 25% or more, but less than 50%.
d. Less than 25°Io. �
�32. What percentage of the stream contains instream structures such
as large woody debris, floating or submerged vegetation, large
rocks or boulders?
a. Greater than 25%.
b. Between 10% and 25%.
c. Less than 10%.
�Cy/C@S Of /30f1C�S (entire lake or pond and wedand complex)
Complete this section only if the wetland being assessed has a surface
water connection to a lake or pond.
33. .Does the lake or pond contain areas of deep and shallow water?
("Deep" is defined as more than 6.5 feet deep.)
a. Yes.
b. Cannot be determined.
c. No.
40 SAecial interest & characferization
�1_0�-� �;.t-P�t,� �±''."'��
°" #
Wetland l Wetland 2 Wetland 3 i r"
Oregon Freshwater Wetland Assessment Methodology
r34. What percentage of the shoreline is shaded at the water's edge by
forested orscrub-shrub vegetation?
a. 60% or more.
b. 24% or more, but less than 64%.
c. Less than 20%.
r35. What percentage of the wetland complex contains cover objects
such as submerged logs, floating or submerged vegetation, lazge
rocks or boulders?
a. Greater than 25% .
b. Between 10 and 25%
c. Less than 10%
Wetland hydrology
36. What is the wetland's primary source of water? (Deternune in
the field or in the office. This may be diff'tcult to determine. If a
surface water connection exists—stream, lake, ditch—use it as
the primary source. If no surface water connection is present, talk
to local natural resource people for hints.)
a. Surface flow, including streams and ditches.
b. Precipitation or sheet flow.
c. Groundwater, including springs or seeps.
r37. Is there evidence of flooding or ponding during a portion of the
growing season? Look for evidence of water fluctuation such as
sediment stains an trees, drift lines, surface scour or sediment
deposits. Also look at the location of the wefland. Is it in a distinct
topographic depression or adjacent to a stream that is known to
flood or fluctuate because of storm pulses?
a. Yes (describe).
b. Unable to determine or not applicable.
c. Na.
r38.Is water flow out of the, wetland restricted {e.g., beaver dam,
concrete structure, undersized culvert)?
a. Yes, the outlet is restricted or the wetland has no outlet.
b. Minor restricrions slow down the water (e.g., undersized
culvert).
c. No, the outlet has. unrestricted flow.
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Wetland 1 Wetland 2 Wetland 3
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Special inferesf & characterization 41
Oregon Freshwater Wetland Assessment Methodotogy
�39. If the primary source of water is surface flow, is the water flow
into the wetland restricted?
a. Flow is not restricted, or if blocked, the obstruction can be
removed easily.
b. Permanent blockage to the flow exists but may be breached
or a new flow channel created (engineering or earth moving
solution).
c. Flow is zestricted and cannot be restored.
40. Has the stream flow or stream bank been modi�ed by human
activities less than 1 mile above the wetland? Modifications
include dams, channelizations and levees, and confinement of the
stream in a pipe.
a. Yes.
b. No.
P(Jb�1C C1CC@SS �O Wet�41TC� SIf2 (selectanappropriatearea
ta observe rhe wetland to answer these questions.)
41. Is the wetland site open to the public for direct access or
observation?
a. Yes, the wetland is open to the public.
b_ Yes, but wetland access is allowed only by pernussion of
the landowne� or managing entity.
c. No, access is not allowed.
r42. Are there visible hazards to the public. at the wetland site?
(Examples: busy road adjacent to the site, and no buffer or
sidewalk exists; steep embankment; and contaminated water.)
a. No.
b. One or two visible safety hazards exist (describe).
c. More than two visible safety hazards exist (describe).
�43. Are there other natural landscape features, such as a stream, lake,
pond, forest or agricultural land contiguous or adjacent to the
wetland?
a. Yes. (List type and extent.)
b. No.
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42 Special interesf & characterizafion
Wt -4�a ir=' ~��9 4�i — C:s!
�d�- Wetland 2 Wetland 3
Oregon Freshwater Wetland Assessment Methodology
r44.Is there existing physical public access to features listed in
Question 43? If not, can such access be created easily, or can
other habitats be observed from the site? For a stream, pond or
lake, access may require dry ground to the water's edge. Stream
access could also be at a road crossing, but consider the safety at
such locations
a. Public access to other habitats exists or can be created
easily.
b. Public access doesn't exist and can't be created easily, but
observation of other features can be made from the site.
c. Public access doesn't exist and can't be created easily. In
addition, observation of other features can't be made from
the site.
r45. Does it appear that access to a viewing spot or wetland edge is
available for individuals with Iimited mobility? (To see whether
the site meets ADA requirements, a more thorough examination
should be done.)
a. Yes.
b. No. (List physical barriers.)
r46. Is there a public access point within 250 feet of the wetland's
edge? Access points include parking lots, transit stops, bike
lanes, trails and water courses. Maintained means that the area is
designated as a car or transit area by the managing entity.
Unmaintained would be a road pull-off or other area that people
use but is not designated for such use. Describe the type of
access.
a. Yes, a maintained access point exists (describe}.
b. Yes, an unmaintained access point exists (describe).
c. No access point exists, or the access point is hazardous.
Recreation
�47. Is the wetland accessible by boat?
a. Boat launching areas or access points exist on site or within
•.- 1/2 mile on a connected lake, river, bay or other body of
water. -
b. Potential to develop boat launching areas or access points
exists, or such features are more than 1/2 mile but less than
1 mile from the wetland.
c. No boat launching areas or access points exist within 1
mile of the wetland, and potential to develop launching
azeas or access points is limited.
� C w � �. �,� i„�, }-(�•-�"�
Wettand 1 Wetland 2 Wetiand 3
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Snecial interest & choracterization 43
Oregon Freshwater Wetland Assessment Methodology
r48. Are there trails, viewing areas or other structures that guide user
movement to a particular area or areas in or around the wetland?.
a. Yes, developed or maintained trails or viewing areas exist.
b. Yes, undeveloped trails or viewing areas exist that do not
disrupt wildlife or plant habitat.
c. No trails or viewing areas exist, or those that do disrupt
wildlife or plant habitat.
49. Is fishing allowed at the wetland or connected water body?
(Contact local Oregon Department of Fish and Wildlife office.)
Answer "not applicable" if question 18 was answered "b" or "c,"
unless question 21 indicates that 10% or more of the wetland's
area is cavered by open water.
a. Yes (either aII or part of the year).
b. No.
c. Not applicable.
50. Is hunting allowed at the wetland? (If. the wetland is within the
city limits, huntitr►g is not allowed. Otherwise, contact the local
Oregon Department of Fish and Wildlife off'ice for this informa-
tian.)
a. Yes (either all or part of the year).
b. No.
Aesthetics
r51. For rural areas, what is the extent of visual contrast with the
surrounding landscape? (See Figure 6.)
a. Significant contrast with surrounding landscape.
b. Limited contrast with surrounding landscape.
c. Little or no contrast with surrounding Iandscape.
r52. For urban areas, what is the visual character of the surrounding
area? (See Figure 7.)
a. Open space or naturally landscaped areas.
b. Areas landscaped or manipulatecl by people.
c. DeveIoped with no Iandscaping.
r53. Are there visual detractors at the wetland site such as abandoned
cars, litter, shopping carts or other objects that distract the viewer
from the wetland? �
a. Yes.
b. No.
r54. If the wetland contains visual detractors, as indicated in question
53, can they be removed easily?
a. Yes.
b. No.
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wPtland 1 Wetland 2 Wetland 3 4 i -� �;; ;
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b � �, �
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44 Special interest & characterization
Oregon Freshwater Wetland Assessment Methodology
Locate the primary viewing area(s) for the following four ques-
tions (be sure to indicate the location on the overlay).
,.55. What odors are present at the primary viewing location(s)?
a. Natural, pleasant odors only.
b. Unpleasant odors such as automobile exhaust or stench
from a sewage treatment plant are present at certain times.
c. Unpleasant odors are distinct and continuously present.
�".�� � ��, �'�,'� -�°�? ...,,..
Wetland 1 Wetland 2 Wetland 3 `� �"" ��
, ,
� � t � $ .: u� �.,'�.� k',%-� . C ��. � , �. �'`
r .�
.;��r� b i � :s,� k� ��',x`+ ..^ �:. �� �
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s
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�
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Special interest & choracterizafion 45
Figure 6. Visual contras�
The top part of the figure shows a wetland with significant visual contrast with the
surrounding landscape. The bottom part shows a wetland with little or no visual
contrast with the surrounding landscape.
Oregon Freshwater Wetland Assessment Methodolagy
r56. What noises are audible at the prunary viewing location(s)?
a. Bird and wildlife noises and other naturally occurring
sounds.
b. Some traffic and other similar background sounds are
audible in addition to naturally occurring sounds.
c. Continuous tr�c or other intrusive noise is audible in
addition to naturally occurring sounds.
d. Continaous traffic or other intrusive noise is audible, but no
naturally occurring sounds are.
r57. How much of the wetland is visible from the viewing area(s)?
Describe the view.
a. Greater than 50°Io.
b. Between 25°I'o and 50%.
c. Less than 25%.
r58. How many Cowardin classes are visible from the primary view-
ing area(s)? (See question 21 for list of Cowardin classes to use.)
a. More than two.
b. Two
c. One
q� p� � � �' t ,�. �t f
Wetland 1 Wetland 2 VPetland 3� r'�` �—�:
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4
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46 Special interest & characterization
Figure 7. Visual character of urban wetlands.
Beginning with the left part, this figure shows an urban wetland. with naturally
tandscaped areas, areas landscaped by peopde and with untandscaped devel-
oped areas.
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: BE-01
�
More thau one Cowardin class
Dominated by emergent vegetation and p
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water bo
Less than 50% of stream is shaded
Only portions of stream are modified
<10% of stream has instream stxuctures
�ry water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Wetland has minor flow restrictions
S.tream modified
Water not taken out of stream
No adiacent Water Qualitv Limited s
Wetland functions are ixnpacted or de�a
Primary water source is surface #low
Water flow is not restricted
No access allowed to wetland
One or two visible hazards to public
intact fish or wildlife, but both functions not
Unmaintained public access within 250 feet
No boat launching can be developed
No trails, viewine areas e�cist
Two Cowardin classes visible
>50% of wetland can be seen
Visual detractors exist but can be removed
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is between 10 and 40%
' >:>:> : > �r�det�::>::::>::::: <;::»:<::>::>:::z;:':<::'>;::>::::::>>::::>::>:::>:;:»;::<:;:::>>::;;»:> >.
� .:::. , ..:.
No adjacent Water Quality Limited streams
Adjacent land use is primarily developed uses
Some non-salmonid fish snecies vresent in strea
Wetland is 0.5 to 5 ac
Adjacent land use is
No adiacent Water
or <0.5 and connected
iaxily developed uses
lity Limited streams
Dominated
Urban uses
etation and pondi
pe of wetland
of wetland
Adjacent land use is primarily developed nses
Adjacent zoning is primarily developed uses
Dominated by emergent vegetation and pondin,
e�?::::ai�e��ia� ::»::»::::>:::<:::>::::>::::::::>: ::> >:>;:;:::: ::::::>:: :<:::>::»::: ::;::::<::::>::: ::>::::>:::>:
1� .:::::::. :::::::::::: ::.::::::..:::::: :.:. . :::::::::::::::::::::::: :.: :.::: .::::: :.:::::. :.
Wetland is less than 0.5 acre
Wetland buffer is between 10 and 40%
Potentiallv sensitive to future imnacts
Other habitats can be observed not accessed
Umnaintained public access point e�cists
Wetland is not limited mob�itv access�le
Wetland provides habitat for some wildlife
No fishing is a�lowed
No huntinQ is allowed
Wetland surrounded by landscaped areas
U�pleasant odors present at certain times
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: BE-02
More than one Cowardin class Surface water connection to -other wetland
Dominated b emer ent ve etation and ondin No ad'acent Water li limited streams
Low inter ersion Ad'acent land is rimaril develo ed uses
Less than 0.5 acre of o en water Wetland buffer is between 10 and 40%
Surface water connection to water body
; ; :.: ;:.;:.; :.,:.
;T::>><:: . >':;::::::>:i
>:::::: >:.::: ,:..
,., .>"> mE .��
;:.;::. - :.:..: >::> ;:.,;... r : ..... :. .. ...
... .
Between 50% and 75% of stream is shaded IVo ad'acent Water Qua1i Limited streams
Onl ortions of stream are modified Ad'acent land use is rimaril develo ed uses
<10% of slxeam has instream slructures Some non-salmonid fish species t�resent in strea
iry water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Wetland has minor flow restrictions
Stream modified
Water not taken out of stream
No adjacent Water Qualitv Limited streams
Wetland fimctions are impacted or degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
One or two visible hazards to. public
o intact fish or wildlife, but bot]i functions not
Unmaintained
No boat lai
No trai
access within 250 feet
; can be developed
ins areas exist
Two Cowardin classes visible
>50% of wetland can be seen
Visual detractors exist but can be removed
Wetland is 0.5 to 5 ac
Adjacent land use is
No adjacent Water
tl'`
> : :> : : : <.; ::de�:::>::><::::<::< :<:::;;»»»>:
�:::: :::: :: ::::. . : .
Dominated by emerg�
Development d
Urban uses u
;:.;:.;:.:�:.;::;;:> <;:.>::;:.;:.:»::>::: :
ta> °i��>
�ct�: <:>:<::::
�l�-..........1� .:... ...........
Adjacent land use is
Adjacent zoning is �
Dominated bv emergi
or <0.5 and connected
iarily developed uses
lit�Limited streams
�etation and ponding
>lope of wetland
pe of wetland
_ . _.
iarily developed uses
arily developed uses
e�etation and pondin�
Wetland is less than 0.5 acre
Wetland buffer is between 10 and 40%
Potentially sensitive to future impacts
Other habitats can be observed not accessed
Unmaintained public access point exists
Wetland is not limited mobilitv accessible
Wetlandprovides habitat for some wildlife
No fishing is allowed
No hunting is allowed
��� ��� :'::>::>::>::?::>:: �;:<:<; : �>:>:s>:::i: ;:<';::;!�<:>:<:::>::>::<:::':'!`!� :::
,:.
�,�',+,�... b ........................................... :..:.......:.:::::::..........::::::........
Wetland surrounded by landscaped areas
Uripleasant odors present at certain tunes
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Cond.itions Summary Sheet
Wetland Assessment Unit: CA-01
More than one Cowardin class
Dominated bv woodv ve�etatio
Between 0.5 and 1 acre of open water
Surface water connection to water bod�
iry water source is
Wetland floods or
�h wetland vegetat
No surface comiection, but wetlands w/in 3 miles
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is greater than 40%
xndwater Wetland is 0.5 to 5 acres, or <0.5 and connected
�ds Ad'acent land is rimaril o en ace
cover No adiacent Water Quality Limited streams
Wetland is not within 100 year floo lain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connecl
Water has �estricted flow out of wetland
Stream modified
Water taken out of stream
No adjacent Water Quality Limited streams
Wetland is open to the public
No visible hazards to public
etland provides diverse wildlife, intact fish
Maintained p
No boat lai
Maintained
access within 250 feet
ig can be developed
, viewin� areas exist
Two Cowardin classes visible
25 - SO% of wetland can be seen
No visual detractors are present
Dominated
of wetland
Forest/natural area
ijacent land is �
acent zoning is
Dominated by �
Public access to other habitats exist
Maintained public access point exists
Wetland is not limited mobilitv accessible
Wetland provides diverse wildlife habitat
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres�
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: CA-02
One Cowardin class with >5 species
Dominated by woody vegetation
Low interspersion
Less than 0.5 acre of open water
No surface connection, but waterbodv w/in 1
ry water source is
Wetland floods or
�h wetland ve�etal
No surface cormection, but wetlands w/in 3 miles
No adjacent Water Qualitv limited s�eams
Adjacent land is pi
Wetland buffer is
zndwater Wetland is less than 0.5 acre and not connected
ds Ad'acent land is rimaril en ace
cover No adiacent Water Qualitv Limited streams
Wetland is not within 100 yeaz floodplain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland has restricted outlet
NfA
Water taken out of stream
No adiacent Water Qualitv Limited streams
One or more functions lost/not
Primary water source is groun
N/A
Wetland is open to the public
No visible hazards to public
intact fish or wildlife. but both functions not
Maintained public access within 250 feet
No boat launching can be developed
Maintained trails, viewin� areas exist
One Cowardin class is visi`ble
25 - 50% of wetland can be seen
No visual detractors are present
Urban uses
ijacent land is pri�
acent zoning is pri
Dominated bv woc
than 40%
e of wetland
of wetland
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
'otentiallv sensitive to future impacl
Public access to other habitats e�st
Maintained public access point e�usts
Wetland is not limited mobilitv accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: CA-03P
Y,
One Cowardin class with >5 species
Dominated by emergent vegetation
Low interspersion
Less than 0.5 acre of open water
No surface counection, but waterbody w/in 1
Primary water source is precipitation
Can't determine if wetland floods or ponds
High wetland vegetation cover
;;;:.;;:.;:.;::::;. .< : ::::.:::: :: : ::.;;::.:;::::::;::::;:.;;;:..:: :::.;:;::.
>::>:;::'<:I� :���d
;::::::>::::::>:::::::€:::>::>::>::»::>::::>:::<:>::::::«:::::>:::<:>;::>::;:::>:<::<:::>:>:::>::>::>::»:::...... p............
Wetland is not within 100 year floodplain
Can't determine ifwetland floods orponds
Wetland is less than 0.5 acre and not connectec
Wetland has restricted outlet
» <:::::Pv�eri�iall :'':::se�sif
� ::::::::: .:::.
Stream not modified
Water taken out of stream
No adjacent Water Quality Limited streams
";;:.;;:1
>::::::>::�:i��Z£ :�lql��'��.
One or more functions losdnot present
Primary water source is precipitation
Wetland is open to the public
No visible hazards to public
o intact fish or wildlife, but both functions not
>:::::��r��z�# es<:ir�er;
Maintained public access within 250 feet
No boat launching can be developed
Maintained lrails, viewing areas exist
One Cowardin class is visi`ble
>50% of wetland can be seen
No visual detractors are present
No surface connection, but wetlands w/in 3 m:
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is greater than 40%
Wetland is less than 0.5 acre and not connected
Adjacent land is primarily open space
No adjacent Water Quality Limited streams
�:: ::;:;: :'��d:'::::::>:::::::::::>:::>:::>::> >::`!>::>:<:<::::::>::::::::::>:::::::<:::: ::>::::>:::<::<:<:::;::>::;::<'':::::>::::;:: :::::>::>`:':
............................................................................................
Doxninated by emergent vegetation
Open space downslope of wetland
Urban uses upslope of wetland
acent land is �
cent zoninQ is
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
Potentially sensitive to future impacts
a3ii� ::tt5es<?<:::`:::;;<:::;<:>:::<:::::<.:::«»::>::>::>`::>:<;::;;:; :>.<»::>::>:»>?::»»::»s»::>.
I .::::::: : . : :: : : : :::. . : : :. : : : : : : :::: :. : : : : : :: : ::: : : : : : : : :.: : : : :.: : :::.:: ::::: : : : ::: : : : : ::::.
Public access to other habitats e�st
Maintained public access point exists
Wetland is. not limited mobility accessible
;: �>':>' :orti�idi�.tii�s:><:>::::;:::::<;:;:::::::>:>:>::>;::»;::::::::>:::::<:':<::::::>>::::>>::::>>::::>>:::;:;
�a[.
�� . .... ._... ._ ....
Wetland provides habitat for some wildlife
No fishing is allowed
No huriting is allowed
t�
::: S:: i:i:;i:i:;i:i:;::::>i;:i22;i( > i!i!i;;i!i!i;::::::i!:!;!!:;;:::>>>i;'<' `'?`;� �;�;i::;;:i ';:_;;i!ii;i;;ii:;i:i:;i?: 2
Wetland surrounded by natural areas
Natural odars present at wetland
Some traffic and natural noises are present
Test Linn LWI
FWAlYI Functions and Conditions Summary Sheet
�etland Assessment Unit: CA-04
One Cowarclin class with >5
Dominated by woody vege
Low interspersion
Less than 0.5 acre of o en
No surface comiection, but waterbc
ry water source is
Wetland floods ar
�h wetland ve�etal
water
�dv w/in 1
No surface connection, but wetlands w/in 3 m
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is greater than 40%
andwater Wetland is less than 0.5 acre and not connected
ds A'acent land is rimaril o en ace
cover No adiacent Water Quality Limited streams
Wetland is not within 100 year floodplain
Wetland floods orpands
Wetland is less than 0.5 acre and not co�nected
Wetland has restricted outlet
N/A
Water taken out of stream
No adiacent Water Qualitv Limited slreams
One or more fimctions lost�nat
Primary water source is groun
N/A
Wefland is open to the public
No visible hazards to public
intact fish or wildlife, but both fimctions not
Maintained public access within 250 feet
No boat launching can be developed
Maintained trails, viewing areas exist
One Cowardin class is visible
>50% of wetland can be seen
No visual detractors are presen
Dominated
LTrban uses
ijacent land is prim
acent zo nin�u is prix
Dominated bv woo
e of wetland
of wetland
ace
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
`otentiallv sensitive to future impac�
Public access to other habitats exist
Maintained public access point exists
Wetland is not limited mobilitv accessible
Wetland provides habitat for some wildlife
No fishing is altowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are nresent
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: CA-05
One Cowardin class with >5
Dominated by woody vege
Low interspersion
Less than 0.5 acre of open
No surface coYmection, but waterbc
ry water source is
Wetland floods or
¢h. wetland vesetal
water
idv w/in 1
No surface connection, but wetlands w/in 3 m
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is �reater than 40%
.uidwater Wetland is less than 0.5 acre and not connected
.ds Ad'acent land is rimaril en ace
cover No adiacent Water Oualitv Limited streams
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Wetland has restricted outlet
N!A
Water taken out of stream
No adiacent Water Quality Lunited streams
One or more functions lostlnot
Primary water source is groun
N/A
Wetland is open to the public
No visible hazards to public
intact fish or wildlife, but both functions not
Maintained p
No boat la�
Maintained
access within 250 fe
ig can be developed
, viewing areas exist
One Cowardin class is visible
>50% of wetland can be seen
No visual detractors are vresen
Dominated
Urban uses
�e ofwetland
of wetland
�jacent land is �
acent zoning is
Dominated by
Wetland is less than Q.5 acre
Wetland buffer is greater than 40%
'otentially sensitive to future impac�
Public access to other habitats e�st
Maintained public access point e�sts
Wetland is not limited mobility accessi�ble
Wetlaud provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
West Linn LWI
OFWAM Functions and Conditions 5ummary Sheet
Wetland Assessment Unit: CA-06
One Cowardin class with >5 ecies No surface connection, but wetlands w/in 3 mi
Dominated b emer ent ve etation and ondin No ad'acent Water Qua1i limited streams
Low inte ersion Ad'acent land is � � o en ace
Less than 0.5 acre of en water Wetland buffer is eater than 40%
Surface water connection to water body
,:
I� aetQd 4�: . radec� .
_ _ . __. _..._. _... .. . .__ _ ...._ . _..
Between 50% and 75% of stream is shaded No ad'acent Water uah Limited streams
Stream is in a natural charmel Ad'acent land is ' aril o en ace
<10% of stream has mstream slructures No fish pxesent in stream
uy water source is surface flow
Wetland floods orponds
�h wetland vesetation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetlandis less than 0.5 acre and not connected
Water has unresiricted flow out of wetland
Wetland is 0.5 to 5 ac
Adjacent land is
No adiacent Water
Dominated
Urban uses
�djacent Iand is
acent zomng is �
Dominated bv
or <0.5 and crnmected
zarily open space
Lity Limited streams
_..... _............ _ .
__.... .
__._ ........ ........... ..... ......
egetation and ponding
�ope of wetland
pe of wetland
iarily open space
arily develoued uses
Stream modified
Water taken out of stream
No adiacent Water Oualitv Limited sUreams
Wetland functions are impacted or degra
Primary water source is surface flow
Water flow is not restricted
Access allowed by permission only
No visible hazards to public
intact fish or wildlife, but both functions not
No access point to wetland exists
No boat launching can be developed
Unmaintained trails, viewing areas e�st
One Cowardin class is visible
>50% of wetland can be seen
No visual detractors are present
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
'otentiallv sensilive to future imuact
Public access to other habitats exist
No access point to wetland exists
Wetland is limited mobility accessible
Wetland provides babitat for some wildlife
No fishing is allowed
No hunting is allowed
Wetland surrounded by natural areas
Natural odors present at wettand
Some traffic and natural noises are pres�
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: CS-01
�
More than one Cowardin class
Dominated by emergent vegetation and
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water b
Between 50% and 75% of stream is shaded
Stxeam is in a natural channel
<10% of stream has instream structures
'rimary water source is surface flow
Wetland floods or ponds
Moderate wetland vegetation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has uurestricted flow out of wetland
Stream modified
Water not taken out of stream
No adiacent Water Qualitv Lixnited streams
Wetland functions are impacted or degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
One or two visible hazards to public
inta.ct fish or wildlife, but both functions not
No access point to wetland exists
Boat launching can be developed
No trails, viewin� areas e�st
One Cowardin class is visible
>50% of wetland cau be seen
Visual detractors exist but can be removed
Surface water connection to other wetland
No adjacent Water Quality lunited streams
Adjacent land is pri�nari�y developed uses
Wetland buffer is greater than 40%
___.._ . _ . .... ............ _ . .... .
�ra ed - :. ..::::::. . . .. :.
.�.
No adjacent Water Quality Limited streams
�djacent land use is primarily developed uses
No fish present in stream
Wetland is 0.5 to 5 ac
Adjacent land use is
No adiacent Water
Dominated
Urban uses
acent Iand use is
iacent zonine is i
Dominated
or <0.5 and connected
iarily developed uses
lity Limited streams
_.. ..... ___... .._.._ .............
_.._. ... _ _
_ .............. .... ............._. .._
_........
_ ....... . . ....... ..... ._............ ..._.
_ .... .... . ..... ... ...__ .. . __
_ .._ .... . ................. ...
egetation and poncling
�lope of wetland
pe of wetland
_ ............. ....... .._. ... ._. .. ......
_.__ . ............... . _........
_ ................................_ . . _. .....
_..._ ................ __......
_ ............ . ..._ _ .......
_ ................................ __ _........
_ . . ....... .... .. ..._ _ _........
_. .._
_..._ ... ............. ...
_ ...... _ ...................
iarily developed uses
arily developed uses
e�etation and vondin�
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
'otentiallv sensitive to future imvaci
No access or observation potential
No access point to wetland exists
Wetland is not limited mobilitv accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by landscaped areas
Natural odors present at wetland
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions 5ummary Sheet
Wetland Assessment Unit: FE-01
More than one Cowardin class
Dominated by emergent vegetatio
Low interspersion
Less than 0.5 acre of open water
5urface water connection to water b
Less than 50% of stream is shaded
Stream is in a na.tural channel
<10% of stream has instream slructures
Primary water source is groundw�
Wetland does not flood or ponc
Low wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland does not flood ar pond
Wetland is less than 0.5 acre and not connected
Water has unrestricted flow out of wetland
Stream modified
Water not taken out of stream
No adjacent Water Quality Limited streams
One or more fimctions losdnot
Primary water source is groun
N/A
No access allowed to wetland .
No visible hazards to public
o intact fish or wildlife, but both functions not
No access
No boat lau
No trail;
to wetland exists
; can be developE
ring areas exist
One Cowardin class is visible
>50% of wetland can be seen
No visual detractors are nresen
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is between 10 and 40%
'g#'� :<;:: � � ��� ��:>�:::<:>::>:::<:>::>::::»::::<:>:::>::::>::::;:>:::=:�:>:<:;:;:;:::>':>::::::>::�::<:::::>�:':<:>::>::;:;:<;;::>:::€::::�!:>:::::
.I�. : t� .: :. : :.:: :: : : : : : : ::: . :: : : : :: :.:: : : : : : : : : : :.. ::::::.; ::.;:.: : : : : : : : : : : : : : :.;: :.::: :««.
No adjacent Water Quality Limited streaxns
�djacent land use is primarily developed uses
No fish present in stream
Wetland is 0.5 to 5 ac
Adjacent land use is
No adjacent Water
? `.:` i�e�ei�::::::>::::»::::::::>:::::::!::»::::::::>:::::;:
l�l! , : : : :. : : : : : : : : : : : : :.: : :, : : : : : : : :. : : : : : : :.: : : .
Dominated by �
Open space do
Urban uses u
;:.; .��s:::>::::>::>::
;.
to:::.::: tiva�: �rnp ... ..... . . . .......
Adjacent land use is
Adjacent zoning is �
Dominated bv �
or <0.5 and connected
iarily developed uses
lity Limited streams
rgent vegetation
�ope ofwetland
pe of wetland
__-____.._ __... . ..
iarily developed uses
arilv developed uses
Wetland is less than 0.5 acre
Wetland buffer is between 10 and 40%
Potentially sensitive to future impacts
No access or observation potential
No access point to wetland exists
Wetland is not limited mobility accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by landscaped areas
Natural odors present at wetland
Some traffic and natural noises are presen
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: FE-02
More than one Cowardin class
Dominated by woody vegetation
Moderate interspersion
Less than 0.5 acre of open water
Surface water connection to water b
More than 75% of slream is shaded
Stream is in a natural chaxmel
10% to 25% of stream has instream structures
uy water source is surface flow
Wetland floods or ponds
�h wetland veQetation cover
Wetland is not within 100 year flood}�lain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has unrestricted flow out of wetland
Stream modi_fied
Water not taken out of stream
No adjacent Water Quality Limited streams
Wetland is open to the public
One ar two visible hazards to public
l provides diverse wildlife, intact fish
Unmaintained public access within 250 feet
Boat laimching can be developed
Umnai.ntained trails, viewin� areas escist
Two Cowardin classes visi�ble
<25% of wetland can be seen
No visual detractors are uresen
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wettand buffer is greater than 40%
_ ._. _ ....__ .............................. ............... ...._ .
_ _ .....
_._ ....................................... ....... .. ........
_ __..._ ......._ ........................_.............................
_ .............................._................... . ... .....
_ .. . .... . ................................................ ............
_ ................__. . . ._ ......._.................................. ... . .. ... .....
_ .................... . . .....
_ ................ .... ._ . .._........................__......... ..... . . . .. _...
No adjacent Water Quality Limited streams
Adjacent land is primarily open space
Salmon and/or trout present in stream
Wetland is 0.5 to 5 ac
Adjacent landis
No adiacent Water
Dominated
Urban uses
ijacent land is
:ent zoning is �
Dominated b�
or <0.5 and connected
iarily open space
Lity Limited streams
_ ... .....
_......_ ................_ __
_..........__ ............... ............
_ .. ............... _._ _.....
_ ................. ...._. . .... .....
_....._._ .............__ _._ _ .....
_ ........ . .............. .__... .....
_ .................._ _. .........
_._ ................ . . .... _..
_.. _ .. ... . .. ......_ _._ ...
�dy vegetation
�ope of wetland
pe of wetland
_ _ .... .. ...........
_ .. . .. . ....... . ............
_....... ... _..... .. ....._.. ..
_ ................... .. . ___.._.....
_ .... ......... . _ .
_ ................. .... . . .........
_...._ ................... ..........
............_._......_ .... . ..........
_....._... . ... ....
_._... .._.._ . ... .... _..
iarily open space
arilv developed uses
Public access to other habitats e�dst
Unmaintained public access point exists
Wetland is not limited mobilitv accessible
Wetland provides diverse wildlife habitat
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural azeas
Natuzal odors present at wetland
Some traffic and nahiral noises are pres
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: FR-01
One Cowardin class with >5 speci�
Dominated by emergent vegetation and �
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water b�
Less than 50% of stream is shaded
Stream is in a natural channel
10% to 25% of stream has instream structures
uy water source is surface flow
Wetland floods or ponds
�h wetland ve�eta.tion cover
Wetland is not within 100 year floodplain
Wetland floods orponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Water has unreslricted flow out of wetland
Stream not modified
Water not taken out of stream
No adiacent Water Qualitv Limited streams
Wetland fimctions are impacted or degra
Priuiary water source is surface flow
Water flow is not restricted
No access allowed to wetland
More than two visible hazards to publ:
etland provides diverse wildlife, intact fish
No access point to wetland exists
No boat launching can be developc
No trails, viewin� areas e�st
One Cowardin class is visible
>50% of wetland can be seen
Permanent visual detractors exist
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is greater than 40%
No adjacent Water Quality Limited streams
Adjacent land is primarily open space
Salmon and/or lrout tiresent in stream
Wetland is 0.5 to 5 acres, or <0.5 and connected
Adjacent land is primarily open space
No adiacent Water Qualitv Limited streams
Dominated
Urban uses
�ctjacent land is
acent zonin� is �
etation and po
pe of wetland
of wetland
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
'otentially sensitive to future impact
uses
)ther habitats can be observed not accessed
No access point to wetland exists
Wetland is not limited mobility accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No hunting is allowed
tt�;
Wetland surrounded by natural areas
Natural odors present at wetland
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: FR-02
More than one Cowardin class
Dominated by emergent vegetation and pondi
Moderate interspersion
Less than 0.5 acre of open water
Surface water connection to water bodv
Between 50% and 75% of stream is shaded
Stream is in a natural channel
<10% of stream has instream structures
uy water source is surface flow
Wetland floods or ponds
¢h wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland floods orponds
Wetland is less than 0.5 acre and not connected
Wetland has minor flow restrictions
Stre m 'fi
am odi ed
>::>:::<:Ratiaii��:::>:::::::::::<::i:<:; Water not taken out of stxeam
No a 'acent Water ' Limi
_ _ _ _ _ _.. dt Ouahtv ted streams
Wetland functions are impacted or degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
One or two visible hazards to public
intact fish or wildlife, but both functions not
No access
No boat lau
No traiL
to wetland exists
; can be develope
rin� areas exist
Two Cowardin classes visible
>50% of wetland can be seen
No visual detractors are presen
No surface connection, but wetlands w/in 3 m
No adjacent Water Quality limited sireams
Adjacent land is primarily developed uses
Wetland buffer is �reater than 40%
No adjacent Water
�djacent land use is
No fish pr
ty Limited sireams
�xily developed uses
in stream
Wetland is less than 0.5 acre and not connected
Adjacent land use is primarily developed uses
No adiacent Water Oualitv Limited streams
Dominated
Urban uses
tcent land use is r
P
acent zoning is pri
Dominated bv em
pe of wetland
of wetland
Wetland is more than 5 acres
Wetland buffer is greater than 40%
Potentiallv sensitive to future imnaci
i uses
uses
Other habitats can be observed not accessed
No access point to wetland exists
Wetland is not limited mobilitv accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: FR-03
One Cowardin class with >5 specii
Dominated by woody vegetation
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water b�
More than 75% of stream is shaded
Stream is in a natural charmel
<10% of stxeam has instream slructures
iry water source is surface flovv
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connecte
Water has urirestricted flow out of wetland
Stream modified
Water not taken out of stream
No adlacent Water Quality Limited streams
W etland functions are impacted or degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
More than two visible hazards to public
intact fish ar wildlife, but both functions not
No access point to wetland exi:
No boat la.unching can be develo
No trails, viewin� areas e�st
One Cowardin class is visible
25 - 50% of wetland can be seen
No visual detractors are present
No surface connection, but wetlands w/in 3 miles
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is greater than 40%a
No adjacent Water
�djacent land use is
No fish pr
ty Limited streams
�.rily developed uses
in stream
Wetland is less than 0.5 acre and not connected
Adjacent land use is primarily developed uses
No adiacent Water Qualitv Limited streaxns
Dominated
Urban uses
acent land use is
etation and pc
pe of wetland
of wetland
;ent zoning is
Dominated b
Wetland is more than 5 acres
Wetland buffer is greater than 40%
'otentiallv sensitive to future imnacl
�uses
uses
Other habitats can be observed not accessec
No access point to wetland exists
Wetland is not limited mobility accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No hunting is allowed
� ;::,.>;:�:::.: :::::<:,::::;::;:;;:;:::;::,;:::::::::: :::::::::::::::::::::::::;>;:::::::;::>:::;:;;::::::::::::::::::;::;>:::::;:;::»::;::<;<::
�tt� :>::><>::;:;:>:;:>:<::;:::::>::>:<:::::»>::><::>:::::<:>::>::::>::>:::>:<::::>:<:<:<::::«:::>::::>:::::;:>::::>::::>:<::
�..: ... ......................: .....................................................
Wetland surrounded by landscaped areas
Urtpleasant odors present at certain times
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: FR-04
�
One Cowardin class with >5 species
Dominated by emergent vegetation and ponding
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water body
;:;:>:::T<:>:<:>>;; :.:>:::::
«:»» <»:; ;««<::::::> >:>::>::»»>: »»»: >:>:««:>;>; >;<: <:::>:::::>:<:>
m .act±ed.
P ............ .
Less than 50%. of stream is shaded
Only portions of stream are modified
<10% of stream has instream structures
:;:.;.::.::.;:<:.: ;:.: :::: ::.::.::.;;:.;:;.:<.;:.;:.;:.;:<.;:.;:.;;:.:::.::;.::.:: :::.:.;
;;;:;.;;;: ' �.<.<;:: : ae��:
::::::>::;::>::::>::::: �<::::<:>:::::>::::::>::>:< ::::::::::::::::::::<:::: <:;:;;;;:::>::::>::; :;::>::::;>:::;<:>::.
Primary water source is groundwater
Wetland floods or ponds
High wetland vegetation cover
< "Iii
Wetland is within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has unrestricted flow out ofwetland
:.i::.i::.:i
>::::P��ea�i.ta�l;'; :��ins�
<>:::::::::>::::>:::<: :::::::>::::>:z:>; ;>:<::<::::>::::::>:':::>:::z:::> ::::::»::::>..... , :. .
� ................
Stream modified
Water not taken out of stream
No adjacent Water Quality Limited streams
>:::>:: Hi li :eu��ci
� .::::::. :::::::::::::
Wetland functions are impacted or degraded
Primary water source is groundwater
N/A
<;::<:»::»>::>:<:::>::>::>::>::>::>:::«:: ::::<;:::>::::>::::>::::>::::><;:::<:<:: y yµ
;;;:::::;;:���::� ' :�' xi�i#�:<�
r. +, 2C
::::' :: :::::::�::::::: ....................F.�......1'�..............
No access allowed to wetland
No visible hazards to public
� intact fish or wildlife, but both functions not los
>:>::>N�t: a»: 'rii »ri��e���ies::ii�i�>::
a
i�P.:::::P :.: .:::::::::::::::. ::::::::. :::.1�.::::
No access point to wetland exists
No boat launching can be developed
No trails, viewing areas exist
: ;::::.;:;.;:.;;:;.;:.;:.;:.;;:.;:<.;:.>;;.;:.;:<.;;:.;:.;:.;:<.;:.;:.;::.;:;.;:;.;:. :;.;;;:;;.;:.;;:.;:.;::.;;:.
» >::>::�Y�it::'`
;:.>;:<.;::>::>::»::>:;;::»::;:::>:::<:»::>::>::»::>::»::>::;:::::»::>::>::>::>::;::>::»:<::<:>::>::>::>::>::>::>::>
One Cowardin class is visible
<25% of wetland can be seen
No visu.al dettactors are uresent
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses.
Wetland buffer is �reater than 40%
No adjacent Water Qn�
Adjacent land use is pri�
Salmon and/or trout
c�: � ` s .a�ed ::<::<«:>:::: <::<:::>:><::<::>:>:«:>
.....: b.° ...............................................
Wetland is 0.5 to 5 acres,
Adjacent land use is pri�
No adiacent Water Ou<
Dominated by
Develop�
Urban
lity Limited streams
iarily developed uses
present in stream
or <0.5 and connected
iarily developed uses
lity Limited streams
egetation and ponding
;lope of wetland
�e of wetland
�djacent land use is primarily developed uses
Adjacent zoning is primarily developed uses
Dominated by emergent vegetation
�?: ot��ii�a�:::>:<::::::;:::»::>::::>::::>::::>:::>:>:::>>::»:<:: :':::': <::? ::;:::::>::::::>::::::::::>::::::>::::>::::>::>:
F .::::::::. :::::::::::::: :.: :.:: ::.. :::::::::::::::::: :.. ::::::: :.:::::::::::::::::::::::::::.
Wetland is more than 5 acres
Wetland buffer is greater than 40%
Potentially sensitive to future impacts
�iiiii'.ii:�i:::.i:":�.::Si:.:::.:i:.iY:::.:::.:iiii::.::.::«.:�>iiiii:.i:.:ii:.i:.iiiii:.i:::.i:.ii::.:� :.::.::.::.::
F ' . /.�y : y � .�� .� . ...................................................
' . i+.� " til�� . :::fR'J.�.7::::i:::::;<:i::::i':::i::::>::::::>;::::i::::i:::i:l:L�:::::ij:i:::i?i:::::::::i::::i::i::::i::::::;�
Other habita.ts can be observed not accessed
No access point to wetland exists
Wetland is not limited mobility accessible
'>rec�ab€oiu'>: > �< ,»'vrt�irii�ies:i <:<:::::::::>:«::;;': :::i>:<:::::»>::>::::::>::::::>
�.... ..
PP .: :.:::::..:::::::::::::::::::::::::::::::::::::: :.:::::::::::
Wetland provides habitat for some wildlife
No fishixig is allowed
No huntin� is allowed
Wetland surrounded by landscaped areas
Natural odors present at wetland
Continuous noise with natural sounds
�
West Linn LWI
OFWAM Functions and Conditions 5ummary Sheet
Wetland Assessment Unit: HI-01
One Cowardin class with >5 species
Dominated by woody vegetation
Low interspersion
Less than 0.5 acre of open water
No surface coxmection nor waterbody w/in 1
imary water source is grounclwa
Wetland does not flood or pond
Hi�h wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland does not flood or pond
Wetland is less than 0.5 acre and not connected
Water has urirestricted flow out of wetland
Stream modified
Water not taken out of stream
No adiacent Water Qualitv Limited streams
One or more fimctions losbnot
Primary water source is groun
N/A
Wetlan� is open to the public
No visible ha.zards to public
intact fish or wildlife, but both functions not
Maintained public access within 250 feet
No boat launching can be developed
Maintained trails, viewing areas exist
o` <
M .�le
One Cowardin class is visi�ble
25 - 50% of wetland can be seen
No visual detractors are present
No surface cormection, but wetlands w/in 3 m
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is �reater than 40%
Wetland is less than 0.5 acre and not counected
Adjacent land use is prirnarily developed uses
No adiacent Water Qualitv Limited streams
Dominated
Urban uses
pe of wetland
of wetland
acent land use is �
acent zolung is
Dominated b
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
Potentiallv sensitive to future impac�
i uses
uses
Public access to other habitats exist
Maintained public access point e�sts
Wetland is limited mobility accessi�ble
Q�pQrr,���ec -:: < <
Wetland provides habitat for some wildlife
No fishing is allowed
1�10 huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and nattual noises are pres
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: RO-01
✓
More than one Cowardin class
Dominated by woody vegetation
Moderate interspersion
Less than 0.5 acre of open water
Surface water connection to water bo
More than 75% of stream is shaded
Stream is in a natural channel
<10% of stream has instream. structures
iry water source is surface flow
Wetland floods or ponds
sh wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has unrestricted flow out ofwetland
Stream modified
Water not taken out of stream
No adiacent Water Quality Limited streams
Wetland functions are impacted or degrade
Primary water source is surface flow
Water flow is not resiricted
><;��:�c
Wetland is open to the public
No visible hazards to public
o intact fish or wildlife. but both functions not
Unmaintained public access within 250 feet
Boat launching can be developed
Unmaintained traiLs, viewing areas exist
;; .` o' '.:`:
:.: M .��r
Two Cowardin classes visible
25 - 50% of wetland can be seen
No visual detractors are nresent
Surface water connei
�to adjacent Water Q
Adjacent land is prin
Wetland buffer is
No adjacent Water
�djacent land use is
No fish vr
Wetland is 0.5 to 5 ac
Adjacent land use is
No adiacent Water
Urban uses
acentland use is
jacent zoning is
Dominated b�
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
'otentiallv sensitive to future impac
�uses
uses
Public access to other habitats exist
Umnaintained public access point exists
Wetland is not limited mobility accessible
Wetland provides habitat for sorne wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
�n to other wetland
ity limited streams
ily developed uses
�atex' than 40%
Limited streams
lv developed uses
in stream
or <0.5 and connected
iarily developed uses
litv Limited streams
pe of wetland
of wetland
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TA-01
One Cowardin class with <5 ecies Surface water crnmection to other wetland
Dominated b emer ent ve etation and ondin No ad'acent Water Quali limited streams
Low inter ersion Ad'acent land is rimaril develo ed uses
Less than 0.5 acre of en water Wetland buffer is less than 10%
Surface water connection to water body
;;.: <: :.<:::;: ;:: .. ::;:::::>;> :: :::. .... . . . .
;..::>::>;>;;::::'Tmt .ae�c�c�.��':: �'aded:>r:>: :"::"':':::`:>:.::..;;»::>:::'':....
...
Less than 50% of stream is shaded No ad'acent Water uali Limited streams
Onl ortions of stream are modified A'acent land use is rimaril develo ed uses
<10% of stream has instream structures � No fish present in stream
:::>::>::::>T ��:�de�:�:»;::<:::>�>:;!:>:�>;!::��<::�:::����:::::!:>::::>::>�:>::::>:>::<
'.:.i'::i:.: `::i::::c ' ' : � ; �::
. . :.`... ::'.:.:: �
� .::�::::�::� ::.. . ::::::: .. � :�:'�:::�: ;: � �::::: � �:::
:._:...:.:i:i::.:: . . .;; . . ' . , ..:'�.: :::
Prim water source is surface flow Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland floods or onds A'acent land use is ' aril devel ed uses
High wetland vegetation cover No adjacent Water Quality Lixnited streams
> . .::::.:.: >:;::...:... .:
;:::.<:: .' ,,"
>::::>:.;.<.: :. ,. :.;:;:.
> ::::::.. :... .: .:::.;:......... ..;.. .....::......:..... ::.:...:;:::::;::; : .: ...Tn�tac�'::::::::::` ::::'..... ........::.:..:......;:..:.....:.:..;::::.;::::::>:;: . . . .: . .:
Wetland is not within 100 ear floo lain Dominated b emer ent ve etation and ondin
Wetland floods or onds Devel ment downslo e of wetland
Wetland is less than 0.5 acre and not connected Urban uses slo e of wetland
Wetland has restxicted outlet
;;:::.::.;::.;;:.;;:.;;;;;;:;.;:;.;;;;;;;>;:<.;:.;;: ;;;;: ;;:.;:.;;:;;:;.;:;;.:...:.;;;.;;>;>;,..;>:....;:;.;:.;:.;:.;:::::.:: :::.;;;::.:;.;:;:.:;;:;;;;.;:;.;:.:::.>:.;;:;< :.;:-;.;;: :;:.;>;;>;;;;:<,;;:<;;.;; :.::.:::. ::::::.;;;::;::::::::::::::: :.::::::::.
.. ..... .: . .:. «.;:::::: <:,;;;;>;;;;;:.;:.;::: :.;:.;>;;;;:::::.:,;;>;:::.;>;:.;;;;:.;:.;:.;::.;
<>::::>::>��t m :� t ; >:<::<:>:::>::>::>:;:<><:::»:::::>: >::>::>::>::>:>:::>::»>:>::»::>::>::>:>;<::> >
:.>;; ; :;;:;:.;:.;:.;:.:;.;:.;:.;:;.;:.;:.>:.;;;;;:.;;:;;.;;:.;:.:::.;:;: e�b.a�l. ;>:s�e :�>to:::��.�
>::::»::> »<::>::>::>::::>::::»::><:::;::>::::>:>:::>::::>::<: ::: :::<:;::>:>; �sx��! �.s . . .:............. ....................... ..... ...... .. . ....
Stream modified Ad'acent land use is rim ' devel ed uses
Water not taken out of stream Ad'acent zo ' is rimaril develo ed uses
No adjacent Water Quality Limited streams Dominated by emergent vegetation and ondin
>::;::>::: :::>;«::::>::>::;::>::»::;::>::;<:<::>::>::;:::>::>::>::>::::::>::»::>:<:>::>: :<:»:. ..>:<::; ::;:<:::>::>>::>:::;;:.;::.:<.: :.;;:.;;;:.;:.: :.;:.;:.;;.;;:.;:.;;;.;;>;;;:::..; ::.:.:.... .........:::::. ::::: :.::::::::::<::.::::::::::::::::::::::._::::::.
;;;;::::::::>:::<:»::;::>::<:,:::<:::>::>::>:::<::::>::>:<:;::>::>::::::;<::<;<;;;;;<:::>;;:�o:.+�r e:::� :::::::::::::::::::::::::::::::!':':::>:::
d : : : : a� : : .: : : : : : � : : : : : : : : : : : : .: : : : : . :... :.: : : : :.: : : : : : : : : : : : . : : : : : : :
Wetland functions are im acted or de aded Wetland is less than 0.5 acre
Prim water source is surface flow Wetland buffer is less than 10%
Water flow is not restricted Potentially sensitive to future im acts
>::::>::::>
:.;:.;;;:�.;:.;::.;;::.;.:.: ;>;;;:.;;;:.:::.;:.:.:::.:::::::.;;;:.;::.;:.;:.;:.;;;;::...:< :. :::::::..::.::...::::::::::..::::.: :::.::::::::::::.:;;;;;;;;:.;;;;;;:««::::<:.:.;;:;.:;;;;;::_: ::: ::.:::::::.:::::::::::::.::.:::::. :::..::
< �`Ot�t1fi� �fkx.�I��tItt�t �s�S <:
Access allowed b ermission onl Other habitats can be observed not accessed
One or two visible hazards to ublic Maintained ublic access oint exists
� intact fish or wildlife, but both functions not lo Wetland is limited mobility accessible
;:::>:::;; :�:::<:>::>::>::>::>::>;::>:«:>::» ;;;:.;;:.;;;><:>::>::>::>:«:;:;:.;:.;;;:.;:.;:.;::.:>::
,..:.. : >::>.::::::.
':': ::a >; .::::: >::>::::;: >:::>::.::: >::;<::>:::>.;;»:::>::>::>::>::::: ::,:;:::;;:<>«<>; .::::.
;: ::: ;:
, .;..; .;..
>:.>:::::: . . . P �.....:..... �. .: ra��d� r�cr�*�.t��rn o .: .: �xr�wu�� <.;>:::::::>:::::. .::: ` :: ::::::::..::;::....:.
Unmaintained ublic access within 250 feet Wetland rovides habitat for some wildlife
No boat launchin can be develo ed No fishi is allowed
Unmaintained trails, viewing areas exist No hunting is allowed
;::
>::;:;.. . ;:. Ma��r�t±�I . I��it� >::
One Cowardin class is visible Wetland surrounded b landsca ed areas
>50% of wetland can be seen U leasant odors resent at certain times
Visual detractors exist but can be removed Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TA-02 �
�
One Cowarcbn class with >5 species
Dominated by woody vegetation
Moderate interspersion
Less than 0.5 acre of open water
Surface water connection to water boc
Between 50% and 75% of stream is shaded
Stream is in a natural channel
10% to 25% of stream has instream structures
mary water source is groundw�
Wetland floods or ponds
Low wetland veQetation cover
Wetland is not within 100 year flooc�lain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland has minor flow restrictions
Stream modified
Water not tal�en out of stream
No adiacent Water Qualitv Limited streams
Wetland functions are irnpacted or �
Primary water source is ground`
Water flow is not restricted
No access allowed to wetland
No visible hazards to public
intact fish or wildlife, but both functions not
Maintained public access within 250 feet
No boat launching can be developed
No trails, viewing areas e�st
Two Cowardin classes visible
>50% of wetland can be seen
No visual detractors are nresen
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is greater than 40%
No adjacent Water Quality Limited slreams
Adjacent land is primarily open space
No fish nresent in stream
Wetland is 0.5 to 5 ac
Adjacent land is
No adiacent Water
Dominated
Urban uses
ijacent land is
:ent zoning is
Dominated bS
or <0.5 and connected
iarily open space
lity Limited streams
_... ... _.. .. ........_... ....... .
.......... .... . ... .. ......._....._.. ...
_ ........ .. ... . . . .... ... ..........
_ _ ....... ..... . .. . ... _ .......
_. _ .................. ... ._.
_.._ ....... .................... . .. . ..
.............. ... ... ....... ... .._.._. ..
_... _..
�dy vegetation
�lope of wetland
pe of wetland
_ .... ....... .... .._._.....
_... _ ........ .... . .......... .................
_ . ............... ... _. .. ......
_......._ .............. _. . ..
. ...... . ....
..... _.... _ ................ _.... . .. . ...
......._ .................. _.. _ .._. . ...
____ ... ........ ..._... ..._......
iarily apen space _
arilv develotied uses
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
'otentiallv sensitive to future imnaci
Public access to other habitats e�st
Maintained public access point exists
Wetland is limited mability accessible
[fi.�c�n fl�p�r��fies
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by landscaped areas
Natural odors present at wetland
Some traffic and natural noises are vresen
West Linn LWI
OFWAM�Functions and Conditions Summary Sheet
Wetland Assessment Unit: TA-03
One Cowardin class with <5 ecies Surface water connection to other wetland
Dominated b wood ve etation No ad'acent Water Qua1i limited streams
Low int ersion Ad'acenf land is rimaril develo ed uses
Less than 0.5 acre of o en water Wetland buffer is eater than 40%
Surface water connection to water body
:.
>::>::>: :: :
;:`:::r' < :::..:.:..... :.... �
>> '; :s i�e�:::::::::::;: ;;;>>«::;;:::<;;>::::::;:::i<::::::<:>:::::<>::::< <:>;:::`:<::::«::::<::::::<::;;><"::':;:i:
> T�ini �ete ::or::` ` �-a
Between 50% and 75% of sixeam is shaded No ad'acent Water Quali Limited streams
Onl ortions of stream are modified Ad'acent land use is rimaril 'develo ed uses
<10% of stream has instream structures Some non-salmonid fish species present in strea
ry water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has uxrrestricted flow out ofwetland
Stream modified
Water not taken out of stream
No adjacent Water Quality Limited streams
Wetland functions are impacted or degra
Primary water source is siuface flow
Water flow is not restricted
Wetland is open to the
No visible hazards to
N!A
Maintained public access within 250 feet
No boat launching can be developed
Maintained trails, viewin� areas exist
Wetland is 0.5 to 5 acres, or <0.5 and connected
Adjacent land use is primaril�develo�ed uses
No adiacent Water Quality Limited streams
Dominated
Urban uses
iacent land use is
:erit zoning is
Dominated b
� vegetat�on
pe of wetland
of wetland
Wetland is less than O.S acre
Wetland buffei is greater than 40%
'otentiallv sensitive to fixture impac�
�uses
uses
Public access to other habitats exist
Maintained public access point exists
Wetland is limited mobilitv accessible
Wetland prov
No
No
itat for some wildlife
is allowed
is allowed
One Cowardin class is visi`ble Wetland surrounded b landsca ed areas
>50% of wetland can be seen Natural odors resent at wetland
No visual detractors are resent Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TA-04
One Cowardin class with <5 species
Dominated by woody vegetation
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water boc
More than 75% of stream is shaded
Only portions of stream are modified
>25% of stream has instream structures
Primary water souree is surface flow
Can't determine if wetland floods or pox
Hi�h wetland ve�etation cover
Wetland is not within 100 year floodplain
Can't determine if wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Wetland has minor flow restrictions
Stream modified
Water not taken out of stream
No adjacent Water Qualitv Lunited streams
Wetland fimctions are impacted ar degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
One or two visible hazards to public
l provides diverse wildlife, intact fish
Unmaintai.ned public access within 250 feet
No boat launahing can be developed
�
No trails, viewing areas exist
One Cowardin class is visi�le
25 = 50% of wetland can be see
No visual detractars are presen
Surface water connection to other wetland
No adjacent Water Quality lunited streams.
Adjacent land is primarily developed uses
Wetland buffer is �reater than 40%
No adjacent Water Qi
Adj acent land use is p�
Some non-salmonid fish
Wetland is 0.5 to 5 ac
Adjacent land use is
No adiacent Water
Limited streams
ly developed uses
es present in strea
ar <0.5 and connected
iarily developed uses
litv Limited streams
Dominated
Urban uses
✓nt land use is
;ent zoning is �
Dominated by
�wnslope of wetland
>slope of wetland
primarily developed uses
�rimarily developed uses
woodv vegetation
Wetland is less than 0.5 acre
Wetland buffer is greater than 40°/a
'otentiallv sensitive to future imnacl
Other habitats can be observed not accessed
Umnaintainedpublic access point e�sts
Wetland is not limited mobilitv accessible
Wetland provides habitat for some wildlife
No fishing is allovved
No hunting is allowed
e�liiii >::>::::::>;:::::> :::::::::: ::::<:<:<:::::::>:;::::<:::>>:: ;::;<:::>::::::: ::<:::>::>::::>:::::;:::::::<>:<::::
$ ... ........................: :.:....:.............................................
Wetland surrounded by landscaped areas
Uupleasant odors present at certain times
Continuous noise with natural sounds
West Linn LWI
OFW;AM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TA-05
More than one Cowardin class Surface water connection to other wetland
Dominated b wood ve etation No ad'acent Water Qua1i limited streams
Hi inter ersion A'acent land is rimarii o en ace
Less than 0.5 acre of o en water Wetland buffer is eater than 40%
Surface water connection to water body
,:;: �mt �eted.r�r� aded
__. .
Between 50% and 75% of stream is shaded No ad'acent Water Quali Limited streams
Onl ortions of stream are modified Ad'acent land is rimaril en ace
10% to 25% of stream has instream structures Some nan-salmonid fish species present in stre
mary water source is surface flow
Wetland floods arponds
Low wetland ve�etation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland has restricted outlet
Stream modified
Water not ta,ken out of strea�n
No adiacent Water Oualitv Limited streams
No access allowed to wetland
One or two vistble hazards to public
etland provides diverse wildlife, intact fish
Umnaintained
No boat la�
No trai
access within 250 feet
; can be developed
rine areas exist
One Cowardin class is visi`ble
<25% of wetland can be seen
Permanent visual detractors exist
Wetland is 0.5 to 5 ac
Adjacent land is
No adiacent Water
Dominated
Urban uses
ijacent Iand is
;ent zoning is �
Dominated b�
or <0.5 and cannected
iarily open space
lity Limited streams
_ ...... .................
_ ... ....... .... ....._........._
_ ..............._....... ..
_ ....... ........._..._. ._
_ ................................. .
_.._...._ .............._......
_........ _ ... ..................
u ..... .. ............. ... .... ..... . ...
�dy vegetation
�lope of wetland
pe of wetland
iarily open space
arily developed uses
Other habitats can be observed not accessed
Umnaintained public access point exists
Wetland is not limited mobility accessible
Wetland provides diverse wildlife habitat
No fishing is allowed
No hunting is allowed
Wetland surrounded by landscaped areas
Uupleasant odors present at certain times
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TA-06
.�
One Cowardin class with >5 species
Dominated by emergent vegetation
Low interspersion
Less than 0.5 acre of open water
No surface connection, but waterbodv w/in 1
Primary water source is groundwater
Wetland does not flood or pond
High wetland vegetation cover
>::�:Q�it::o
Wetland is not within 100 year floodplain
Wetland does not flood or pond
Wetland is less than 0.5 acre and not connecti
Wetland has restxicted outlet
;:.;:.;;:.;:.;:.;:.;:.>::;<:<:> »::>::»»:<::<:::: :::<::::::>:<:>:<:;::>::>::>:
»:>::>::>P���t�:�ll `':: s��
>::::>::::>::::>::::>::::>: ::>: <:>::> :: :>:;:; <:»>::>::> :::;::::>::::>::::>::: <:::>:::::
Stream modified
Water taken out of stream
No adjacent Water Quality Limited streains
<::: :: :�To��rat�:::Ei�
One or more functions tostlnot present
Primary water source is groundwater
N/A
<.;:.;:.;:.;;>:.;:.:.:::;::»::>::>::>:,::>::»:<;::::>::>:<::;:::>:::<:>::>::>::>::>
<>::::;<:::l��f;:i�'' :�o`ar�i�t
::::.:::.::.::.::.::.::.::.::::.::.:: :::.;:.;:;:.::.>:.;:::::.;:.;;.;:.;:.;:.;:
>::;::>::>::>:>:::><:>::>:><:><:>::><:»::<:>::::>::;::>::>:::>:;:;:::>::>::>::> :.. ..... .......... �1�.....1�... ...
No access allowed to wetland
No visible hazards to public
o intact fish or wildlife, but both fimctions not ]
>;:>:.>::<:.>:::<:;:<:>::>::>::>::;::«::«<::
<: <:;:::Not:::a :'<.< >: teJd�iies::i�a�:>::
PP..:.. ......� ...........................i?
No access point to wetland exists
No boat launching can be developed
No trails, viewing areas exist
>:<:N€�
One Cowardin class is visible
<25% of wetland can be seen
No visual detractors are present
No surface coxmection, but wetlands w/in 3 m
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is �reater than 40%
Wetland is less than 0.5 acre and not connected
Adjacent land is primarily open space
No adjacent Water Quality Limited streams
l?! <; reseiii�t::':: :<::>::'::> ::::::::::::::::::>::::>:::;:::::>::>::>:::::>:'>::'::« ::: : <:<:!::<:;;;::<;:i::>;:::::<::<::<:>::::::>::>::::::>;:
:::::::::.::::::::::::: ::. :.:: ::::.:: :.: :.::: :::.::::::: :::,: ,::::::::::::::::: :.:::::::::: ::.::: :.: :.:.
Dominated by emergent vegetation
Open space downslope ofwetland
Urban uses upslope of wetland
Adjacent land is primarily open space
Adjacent zoning is primarily developed uses
Dominated by emergent vegetation
i�iu�' vt;e:�al:;;;;::<i:>:<:>::«:<:;:::::!;;;::>' ! ::
� .::::::::::::::. ::,:::::::::::._:::::::. :::::::::. :::::::. :. :::::::. ::::::::::::::::.
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
Potentially sensitive to future impacts
di�c�:�io�� �ises:::::>>::::::>::::>::::::::>::>::>:'::>` >`::::;:::<>: :»:>::<:>::>::;::>::>:::>::::::;::::;'
Other habitats can be observed not accessed
No access point to wetland exists
Wetland is not limited mobility accessible
'<:�����oii''�> _:<:i>:«::: ::>:<:i:> :
�.: : �p p. : . : : , : : : : :.: : : : : :.: : : : . : : : : : : : : : : : : : : . : : : : : : . : : . : : : : : : : : .
Wetland provides habitat for some wildlife
No fishing is allowed
No hunting is allowed
�t ': ;<>::>:>:::>::::::::>:::::::::<:>;:::;:»:<:::>::> ::::>::::;:>::::>:::<:>::>::::>::::>::::::>::::>::;:;;:::;>:::<:::>:::::<::::>::::>:>:::::>::::::
� . .. ........ .. ...
Wetland surrounded by natural areas
Unpleasant odors present at certain times
Some traffic and natural noises are present
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Units TA-07
One Cowardin class with >5 species
Dominated by woody vegetation
Low interspersion
Less than 0.5 acre of open water
No surface cormection, but waterbodv w/in 1
Primary water source is groundwa
Can't determine if wetland floods or �
Hi�h wetland ve�etation cover
Wetland is not within 100 year floodplain
Can't determine if wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland has restricted outlet
Stream modified
Water taken out of stream
No adiacent Water Oualitv Limited streams
Wetland functions are imp�
Primary water source is
N/A
No surface connection, but wetlands w/in 3 m
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is �reater th�w 40%
Wetland is 0.5 to 5 ac
Adjacent land is
No adiacent Water
or <0.5 and connected
Limited streams
Dominated
Urban uses
�djacent land is
acent zoning is
Dominated b�
e of wetland
of wetland
or de aded Wetland is between 0.5 and 5 acres
i itation Wetland buffer is eater than 40%
Potentiallv sensitive to future imnact
uses
No access allowed to wetland Other habitats can be observednot accessed
No vis�'ble hazards to ublic No access oint to wetland exists
o intact fish or wildlife, but both functions not los Wetland is not limited mobilitv accessible
No aceess
No boat lau
No trail:
to wetland exists
; can be develope
ring areas e�st
Wetland provides habitat for some wildlife
No fishing is allowed
No hunting is allowed
One Cowardin class is vis�le Wetland surrounded b natural areas
<�5% of wetland can be seen U leasant odors esent at certain times
No visual detractors are present Some traffic and natural noises are presen
West Linn LWI
OFWAM Functions and Conditions 5ummary Sheet
Wetland Assessment Unit: TA-08
�
One Cowardin class with >5 ecies Surface water connection to other wetland
Dominated b wood ve etation No a'acent Water Qua1i limited streams
Moderate inter ersion Ad'acent land is rimaril develo ed uses
Less than 0.5 acre of en water Wetland buffer is eater than 40%
Surface water coxmection to water body
_. ;:::;:;::.. . ::;::
Tm a�t�ii.>�iz. . .: :ir���ed. .; . `
_ __. _
Between 50% and 75% of sixeam is shaded No ad'acent Water Quali Limited streams
Onl ortions of stream are modified A'acent land use is rimaril develo ed uses
10% to 25% of stream has instream structures Some non-salmonid fish species present in strean
ry water source. is groundw�
Wetland floods or ponds
�h wetland vegetation cover
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has unrestricted flow out of wetland
Stream modified
Water not taken out of stream
No adjacent Water Quality Limited streams
Wetland functions are impacted or degra
Primary water source is surface ilow
Water flow is not restricted
No access allowed to wetland
One or two visible hazards to public
intact fish or wildlife. but both functions not
Unmaintained
No boat la�
No trai
access within 250 feet
; can be developed
�n� areas exist
One Cowardin class is visible
25 - 50% ofwetland canbe seen
Visual detractors exist but can be xemoved
Wetland is 0.5 to 5 ac
Adjacent land use is
No adiacent Water
or <0.5 and connected
iarily developed uses
Litv Limited strea�ns
Dominated
Urban uses
ynt land use is
:ent zotring is
Dominated b�
e of wetland
of wetland
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
Potentiallv sensitive to future imnacl
�uses
uses
Other habitats can be observed not accessed
Unmaintained public access point e�sts
Wettand is not limited mabilitv accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No hunting is allowed
��s�u
Wetland surrounded by landscaped areas
Natural odors present at wetland
Some traffic and natural noises are present
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TA-09
More than one Cowardin class
Dominated bv woodv veQetatio
Less than 0.5 acre of open water
Surface water crnmection to water b
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is �reater than 40°/a
More than 75% of stream is shaded No ad'acent Water Qua1i Lunited streams
Onl ortions of stream are modified A'acent land use is ' aril devel ed uses
10% to 25% of stream has insiream structures Some non-salmonid fish species present in strea
uy water source is groundwa
Wetland floods orponds
eh wettand ve�etation cover
Wetland is not within 100 year flbodplain
Wetland floods or ponds
Wetlaud is 0.5 to 5 acres, or <0.5 and connected
Wetland has restricted outlet
Streain modified
Water not taken out of streaut
No adiacent Water Qualitv Limited streams
Wetland fimctions are impacted ar degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
No visible hazards to public
intact fish or wildlife, but both functions not
Unmaintained public access within 250 feet
No boat launching can be developed
No trails, viewin� areas e�st
Two Cowardin classes visible
25 - 50% of wetland can be seen
No visual detractors are present
Wetlan.d is 0.5 to 5 ac
Adjacent land use is
No adiacent Water
or <0.5 and connected
iarily developed uses
lity Limited streams
Domina.ted by woo
Development downs:
Urban uses upslop
�'G: ��C�S:::: :::: !::::i?:':>:::<:>::>
jacent land use is pri
3jacent zoning is prn
Dominated by emer�
pe of wetland
of wetland
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
'otentially sensitive to future impacl
Other habitats can be observed not accessed
Umnaintained public access point exists
W etland is not limited mobilitv accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrouncled by landscaped areas
Natural odors present at wetland
Some traffic and natural noises are presen
West Linn LWI
OFWAM Functions and Cond.itions Summary Sheet
Wetland Assessment Unit: TR-01
More than one Cowardin class
Dominated by woody vegetation
Moderate interspersion
Less than 0.5 acre of open water
Surface water connection to water b
More than 75% of stream is shaded
Stxeam is in a natural channel
10% to 25% of stream has instream structures
ry water source is groundwa
Wetland floods or ponds
;h wetland ve�eta.tion cover
Wetland is not within 100 year flood�lain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Water has unrestricted flow out of wefland
Stream not modified
Water not taken out of stream
No adiacent Water Quality Limited streams
Access allowed by permission only
One or two visible hazards to public
etlaud provides diverse wildlife, intact fish
No access point to wetland eusts
No boat launching can be developc
No traiLs, viewin� areas e�st
Two Cowardin classes visible
25 - 50% of wetland can be seen
Visual detractors e�st but can be removed
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is greater than 40%
_... ....
No adjacent Water Quality Limited streams
Adjacent land isprimarily open space
No fish vresent in stream
Wetland is 0.5 to 5 ac
Adjacent land is
No adiacent Water
Dominated
Urban uses
ijacent land is �
lacent zollirig is
Dominated by �
or <0.5 and connected
iarily open space
fity Limited streams
_ ......................_.. .. ....._...
_ . . . _._._ . ..
__ ..... ... .._ . .. ........ . . .
_ ...... ... .. ..... . .... _ _ _ ..
_. _ .... . ..
_ .. _ ...
_ .............. ..... . . . . ... ...
_.... . ....
_ __ .. .. ..
__ ........... .._ _.._...
_..._ _ _.
�dy vegetation
ope ofwetland
�e of wetland
_........ .._ ... ........... . ........... ......
_._...... ._........_ .........................
iarily open space
Other habitats can be observed not accessed
No access point to wetland exists
Wetland is not limited mobilily accessible
Wetlandprovides diverse wildlife habitat
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TR-02
More than one Cowardin class
Dominated by woody vegetation
Moderate interspersion
Less than 0.5 acre of open water
Surface water connection to water b
More than 75% of stream is shaded
Stream is in a natural channel
<10% of stream has instream structures
�ry water source is
Wetland floods or
eh wetland ve�etai
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily o�space
We�land buffer is greater than 40%
No adjacent Water
Adjacent land is
No fish ur
Lunited streams
in stream
�ndwater Wetland is 0.5 to 5 ac
_ds Adjacent land is
cover No adiacent Water
Wetland is not within 100 year flood�lai.n
Can't detennine if wetland flaods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Water has unrestricted flow out of wetland
Streaan not modified
Water not ta.ken out of stream
No adjacent Water Quality Limited streams
Access allowed by permission only
One or two visible hazards to public
etland provides diverse wildlife, intact fish
No access
No boat lau
No traiL
to wetland exists
; can be develope
ring areas exist
Two Cowardin classes visible
�25% of wetland can be seen
No visual detractars are nresen
or <0.5 and connected
iarily open space
titv Limited streams
Dominated
Urban uses
e of wetland
of wetland
ijacent land is prim
acent zo nin$ is prii
Dominated by woo
en
Other habitats can be observed not accessed
No access point to wetland exists
Wettand is not ]imited mobilitv accessible
Wetland provides diverse wildlife habitat
No fishing is allowed
No huntine is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some lxaffic and natural noises are ures
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TR-03
More than one Cowardin class
Dominated bv woodv ve�etatio:
Less than 0.5 acre of open water
Surface water connection to water b
More than 75% of stream is shaded
Stream is in a natural chatmel
>25% of stream has insixeam structures
�ry water source is surface flow
Wetland floods or ponds
¢h wetland vegetation cover
Wetland is not within 100 year floodplain
Wetland floods.orponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Water has unrestricted flow out of wetland
Stream modified
Water not taken out of stream
No adiacent. Water Qualitv Limited sireams
Wetland fimctions are impacted ar degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
No visi`ble hazards to public
etland provides diverse wildlife, intact fish habi
No access
No boat lau
No trail:
to wetland exists
; can be develope
�ing areas exist
Mare than two Cowardin classes visible
<25% of wetland can be seen
Visual detractors e�st but can be removed
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is �reater than 40%
No adjacent Water Quality Lixnited streams
�dj acent land use is primarily developed uses
Salmon and/or irout nresent in stream
Wetland is 0.5 to 5 acres, or <0.5 and connected
Adjacent land use is primarily developed uses
No adiacent Water Oualitv Limited streams
Dominated
Urban uses
rnt land use is
;ent zoning is �
Dominated b�
pe of wetland
of wetland
Wetland is between 0.5 and 5 acres
Wetlan.d buffer is greater than 40%
'otentiallv sensitive to future imvact
�uses
uses
No access or observation potential
No access point to wetland e�rists
Wetland is not limited mobility accessible
�ec�reatiu�al apParf��es
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by landscaped areas
Natural odors present at wetland
Some traffic and natural noises are nresen
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TR-04
One Cowardin class with >5 speci�
Dominated by woody vegetation
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water b
More than 75% of stream is shaded
Stream is in a natural ehannel
10°lo to 25% of stream has instream structures
�ry water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is not within 100 year flood}�lain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Water has unrestricted flow out of wetland
Stream modified
Water not taken out of stream
No adiacent Water Qualitv Limited streams
Wetland functions are impacted or degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
One or two visible hazards to public
etland provides diverse wildlife, intact fish
No access
No boat lau
No trail�
to wetland exists
; can be develope
rin� areas e�st
One Cowardin. class is visible
>50% of wetland can be seen
No visual detractors are presen
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is �reater than 40%
No adjacent Water Quality Limited streams
Adjacent land use is primarily developed uses
Salmon and/or Lrout r�esent in stream
�T�?RR�sTeTl'�T,�..... i'RT,�1�iSi?M17�
;(�� .::&E���>::>::::::>::::>::>::>:::>::>;:::;:::::::;;::>::::::::>:::.;::<:<:<:::;;..>':::>:> :;<:::::::>:::::::>:>:'`:;:::::<:::::>::>:::::::;
�`?' .... ..... . ... ..
Wetland is 0.5 to 5 acres, or <0.5 and connected
Adjacent land use is primarily developed uses
No adiacent Water Quality Limited streams
Dominated
Urban uses
pe of wetland
of wetland
djacent land use is
acent zo llirig is pri
ed uses
;d uses
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
'otentiallv sensitive to future imnacl
No access or observation potential
No access point to wetland exists
Wetland is not limited mobility accessible
;:>::,�;:>:>::> ::> ::>:: :::: ; :
�e� �a�o� ..o : ` i�rt�i�ies:>:>::>::::>;;:<::<::>::>:<:>;:<:<::;:>::>:::
;� :.::.PP .::. ::::::. :::::.: ::. :::: :.:::::::::<,;:::::::: :.;;;:,
Wetland provides habitat for some wildlife
No fishing is allowed
No hunting is allowed
Wetland surrounded by developed areas
Natural odors present at wetland
5ome traffic and natural noises are presex
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TU-01
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wardin cla th 5 i c nn
ss wi ec es Surface water o ection to other
wetland
»: Dom'
`' � �:>:<::>::>::::>:::.. inated b emer ent•ve etation and n' n or more ter � limi
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ow inte er ' n A' 1 ' rim '
s�o d acent and is anl o en
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Less an OS f i
0
th acre o o en ater Wetland buffer s e er 0
w at than 4 0
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Surface wa nne ' n
ter co ct�o to water bod
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0
Less 50 f
than /o o stream is sh e n r m re d' cent a i 1' '
ad d O e o o a a W ter ua1 um e
Q
t d stream
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10
0
/o of stre
am has instream s c es lmon and/or o r in
iru tur Sa tr ut esent stream
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P' S
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water source is reci i'on i 0.5 acre r 0.5
tah Wetland s to s o and conn
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ected
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<::< ;:;�ationale�;;;::; :::::::::::::; Wetland floods or onds A'acent land is ' aril o en ace
Hi etl
w andve etation c er 'acent Wa er li Limi
ov No ad t ua ted slre
ams
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Wetland is within 100 ear floo lain Dominated b emer ent ve e' n
tai�o and ondin
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';;:::'Ra�o��l�:::::;:::;;:;::::;:;::::; Wetland floods or onds en ace downslo e ofwetland
' 0
<
" Wetland i .5 5 0.5
s to acres or an nne rban uses I e of
�
d co cted U s o wetland
Wetlan ha minor fl r
d s ow estrictions
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tre n m ' 1
S am ot odified A'acent and is 'maril n
d e ace
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ne or inore a 'acen
d t Water uali limited stre Dominated b emer ent e eta 'on
J Q
v t� and ondin
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Wetland functions are im acted or de aded Wetland is between 0.5 and 5 cr
a es
r
0
'�: '> ::`::':'::>`: wate source i reei i tion b er i 0
<:;R��iQ��J. .. s ta Wetland uff s eater than 4/o
N/A Potentiall sensitive to future im
acts
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Wetland is o en to the ublic P lic access to other habi xi
ub tats e st
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>::> :::............................................... azards to ub c Maa tauied ub c access oint e�sts
<:> o intact fish or '1 � e b b 1 i n limi m i'
wi dhf ut oth functions not o Wetland s ot ted ob h ac e i�le
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c ss
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Maintaine lic ' 250 f r' e h i for
d ub access with�n eet Wetland ovid s ab tat some wildlife
Bo 1 i ' i
`><<:::�t��ria�'e:: `':::!'::;:: at aunchin areas exist F shm s allowed
M in '
a tained trails vie ' areas exist No huntin is allowed
... ... . .. .. ..
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wing g
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n n
O e Cowardin class is visible Wetland surrounded b atural areas
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0
<::>::::�Catianale: '::::::<:<:>::>:::: 50 0 of etl o or re ent at tl
;> ::::. ......... ................................. / w and can be seen Natural d s s we and
N r ln i r n
o visual detracto s are resent Some traffic and natura o ses are ese t
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W est Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TU-02
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TU-03 �
�,
One Cowardin class with >5 speci�
Dominated by woody vegetation
Low interspersion
Less than 0.5 acre of open water
urface water connection to water b
Less than 50% of stream is shaded
Stream is in a natural charmel
10% to 25% of stream has instream shuctures
uy water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is within 100 year floodplain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland has minor flow restrictions
n m 'fi
Stream ot odi ed
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i::<:<::`:Ra�4n�E;.:;::::;:;;:::;:::;:<::;: W ater tal�en out of stream
<:>: ne or m.are ad'acent Water uali limited
_ _ _ . ... ... . ........... i Q tv
Wetland functions are impacted or degraded
Primary water source is surface flow
Water flow is blocked but mav be breached
Wetland is open to the public
One ar two visible hazards to public
o intact fish or wildlife, but both functions not
Maintained public access within 250 feet
Boat launching areas eaist
Unmaintained trails, viewin� areas exist
Surface water connection to other wetland
One or mare Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is �xeater than 40%
or more adjacent Water
Adjacent land is p '
Salmon and/or trout
Wetland is 0.5 to 5 ac
Adj acent land is
No adiacent Water
Dominated
Urban uses
Quality limited stream
nmarily open space
present in stream
or <0.5 and connected
iarily open space
Lity Limited streams
�dy vegetation
�ope of wetland
pe of wetland
t'acent land is
J �
acent zoning is
Dominated by �
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
'otentiallv sensitive to future imnacts
Public access to other habitats exist
Maintained public access point exists
Wetland is limited mobilitv accessible
Wetland provides habitat for some wildlife
N/A
Huntin� is allowed
One Cowardin class is visible Wetland surrounded b natural areas
<25% of wetlan.d can be seen U leasant odors resent at certain times
Visual detractors e�st but can be removed Some traffic and natural noises are presen
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TU-04
One Cowardin class with <5 s e�cii
Dominated by emergent vegetatio
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water b�
Less than SO% of stream is shaded
Only portions of stream are madified
<10% of stream has instream structures
ry water source is precipitati
Wetland floods or ponds
�h wetland ve�eta.tion cover
Wetland is within 100 year floodplain
Wetland floods or ponds
Wetland is less �an 0.5 acre and not connected
Wetland has minor flow restrictions
Stream not modified
Water taken out of stream
or more adiacent Water Qualitv limited
Wetland functions are imp�
Primary water source is
N/A
Surface water connection to otlier wetland
One or more Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is less than 10%
or more adjacent Water
Adjacent land is p '
Salmon and/or trout
Wetland is 0.5 to 5 ac
Adjacent land is
No adiacent Water
Dominated
Urban uses
�djacent land is
acent zoning is �
Dominated bv
Quality limited stream
nmarily open space
present in strearn
or <0.5 and connected
iarily open space
lity Limited streams
rgent vegetation
lope of wetland
pe of wetland
_
�azily open space
arilv develoved uses
or de aded Wetland is less than 0.5 acre
i itation Wetland buffer is less than 10%
Potentially sensitive to future impa
Wetland is open to the public
No visible hazards to public �
intact fish or wildlife, but both functions not
Umnaintained
Boat 1
Maintained
access within 250 feet
ng areas exist
viewin� areas e�st
One Cowardin class is visible
>50% of wetland can be seen
Visual detractors exist but can be removed
Public access to other habitats e�st
Unmaintained public access point exists
Wetland is limited mobilitv access�`ble
Wetland provides habitat for some wildlife
Fishing is allowed
Huntin� is allowed
Wetland surrounded by landscaped areas
Natural odors present at wetland
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: TU-OS
�
More than one Cowardin class
Dominated by emergent vegetation and ponding
High interspersion
Less than 0.5 acre of open water
Surface water connection to water body
;::>::::>Tii� '�ct�d::
P .::::::::::::::
Less thau 50% of streani is shaded
Stream is in a natural channel
<10% of stream has instream slructures
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a��d .
Primary water source is groundwater
Wetland floods ar ponds
High wetland vegetation cover
<::> Tiii
Wetland is within 100 year floodplain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland has restricted outlet
::::::::.:i:iY.' i: ii::i::i::i::.:i::
<:>:�`i���l�Is ;>��e�x�
!>::::>::::>:::::::>:<':>>::>::::>::>:::>::>:>:::>: < ;>:;>>_::> :> >< :::: _.. y ..
Stream not modified
Water taken out of stream
ne or more adjacent Water Quality limited stream
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>::::::�;: �ii: ei��ricE
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; ::.:::::::::::...:::::.:...: ::.::.....:.:...........:. :..:.:..:.::..:...........�:.:.:::::::.::::::::::
Wetland functions are impacted or degraded
Primary water source is groundwater
N/A
Wetland is open to the public
One or two visible hazards to public
intact fish or wildlife, but both functions not los
>::<:P�u``'> «,:'r»;,r;.»;:`
�de ec eat
:::;:::>:::<:;::<:::::::::>::::':':::<:�:::::::::>:::::'»f � :�>::>:?>:?:� :;:;;:;�':::;:;;:>��>:; ::::.................. .......w�....................
Maintained public access within 250 feet
Boat launching areas exist
Maintained irails, viewing areas e�st
>:::>; ::; ,,, : :: : ;; ; : : ;> ; >: ; , ;< :> ; >: :> ;1V�Q`���i
Two Cowardin classes visi�ble
>50% of wetland can be seen
No visual detractors are present
Surface water connection to other wetland
One or more Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is Qreater than 40%
ne or more adjacent Water
Adjacent land is '
Salmon and/or trout
� ::: :::.: .:::.:::.:::.:::::::::::.: ::::::. ::::.
:c�� r�i�e�:::::<:::>::::>::> ;;:; ::><:::: ;;;>:> :> :>
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Wetland is 0.5 to 5 acres,
Adjacent land is pri
No adiacent Water a
Dominated by emei
Open space c
Urban uses
Quality limited stream
pnmarily open space
present in slream
ar <0.5 and connected
marily open space
ua lity Limited streams
egetation and pondi.ng
lope of wetland
pe of wetland
Adjacent land is primarily open spac.e
Adjacent zoning is primarily developed uses
Dominated by emergent vegetation and pondu
e�::> : :»:::<>:>::>::::>:::>::::::>::::::::>:::>':::<::::s:>::::::>::::>:::>:::: ::>:>::>::::;:::>::::>: _':::>::>::::»:::
��:.....:::::� :.......:::::: ::....... :.::. . :.........:.:::::........:. ::. :::::::. ::.
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
Potentially sensitive to future impacts
tii���lt��pt':uses:::>::>:<:; :> :_ :::iii;:`> : <::>:<:';:::':' i :>::i:; <;:'>::::<::::'z'?:::;;:::>::»>::::
Public access to other habitats e�st
Maintained public access point exists
� Wetland is limited mobility accessible
; : <:'i: >::>:::>:: :>:':::>::::::::>:>:>::::>:>::::::::>::::::::;>::::::«:>'::::>:::>::»::<::>'.
t� :oi E�tut
Pp :::::::::::::::::: �+�':::::::: :.::::::::::::::: :.:::::::::::::::::::::::: :.::::::. :::::
Wetland provides habitat for some wildlife
Fishing is allowed
Hunting is allowed
! ;:;«:<:::»»><::>::>::::::> :::::<;;:::::'<:;.i>;: ;:;;; s<: :'=": :: ::: ;:::«:::::>::<:::>;::'::::::.
�.. _ � .._.... _
Wetland surrounded by natural areas
Natural odors present at wetland
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Cond.itions Summary Sheet
Wetland Assessment Unit: TY-01
One Cowarclin class with >5 species
Dominated by emergent vegetation and pon
Low interspersion
Less than 4.5 acre of open water
No surface connection nor waterbodv w/in 1
Between 50% and 75% of stream is shaded
Stream is in a natural channel
<10% of stream has instream slructures
uy water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is not wi�in 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has ut�resiricted flow out of wetland
5tream not modified
Water nat taken out of stream
No adiacent Water Qualitv Limited streams
One or more functions losdnot presen
Primary water source is surface flow
Water flow is not restricted
Wetland is open to the public
No visible hazards to public
intact fish or wildlife_ but both functions not
Maintained public access within 250 feet
Boat launching areas exist
Maintained trails, viewing areas exist
One Cowardin class is visible
25 - 50% of wetland can be seen
No visual detractors are nresent
Surface water connection to other wetland
No adjacent Water Quality limited streatns
Adjacent land is priman�y open space
Wetland buffer is greater than 40%
; > . ::: .:>
�a�aded . ;;
No adjacent Water Quality Limited streams
Adjacent land is primarily open space
No fish vresent in stream
Wetland is 0.5 to 5 acr
Adjacent land is �
No adjacent Water C
_ ................ ......... _. _.......
deg�aded >
Dominated by emerge�
Open space doa
Urban uses up
�.r�a��c�s. :
Adjacent land is �
Adjacent zoning is
Dominated bv emer�e�
or <0.5 and connected
iarily open space
lity Limited streams
egetation and ponding
�ope of wetland
pe of wetland
�i7y open space
marily open space
e�etation and nondin�
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
Not sensitive to future imnacts
Public access to other habitats exist
Maintained public access point e�cists
Wetland is limited mobility accessible
+�p�r��i�es .. . :
; <.:
Wetland provides habitat for some wildlife
No fishiug is allowed
No hunting is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and nat�al noises are pres
West Linn LWI
OFWAM Functions and Conditions 5ummary 5heet
Wetland Assessment Unit: WI-01
,�
More than one Cowardin class
Dominated by emer�ent ve�etation and
Less than 0.5 acre of open water
Surface water connection to water b
Less than 50% of stream is shaded
Only portians of stream are modified
<10% of stream has instream siructures
ry water so�ce is
Wetland floods or
�h wetland ve�etal
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is between 10 and 40%
No adjacent Water Qi
Adj acent land use is p�
Some non-salmonid fish
Limited streams
ty developed uses
�s uresent in strea
:i itation Wetland is more than 5 acres
ds Ad'acent land use is rimaril develo ed uses
cover No adiacent Water Qualitv Limited slreams
Wetland is within 100 year floodplai
Wetland floods or ponds
Wetland is more than 5 acres
Wetland has minor flow restrictions
Stream modified
Water not taken out of stream
No adiacent Water Qualitv Limited streams
Wetland functions are imp�
Primary water source is
N/A
Dominated
Urban uses
acent land use is
jacent zoning is �
Dominated bv
etation and p�
�e of wetland
of wetland
�uses
uses
or de aded Wetland is more than 5 acres
i itation Wetland buffer is between 10 and 40%
Potentiallv sensitive to future impacts
Wetland is open to the public
No visible hazards to public
o intact fish or wildlife, but both functions
Maintained p
Boat 1
Maintained
access within 250 feet
iing areas exist
, viewing areas exist
Two Cowardin classes visible
25 - 50% ofwetland can be seen
No visual detractors are present
Public access to other habitats exist
Maintained public access point exists
Wetland is limited mobilitv accessi�ble
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: WI-01 a
One Cowardin class with >5 species
Dominated by emergent vegetation
Low interrspersion
Between 0:5 and 1 acre of open water
No surface counection, but waterbody w/in 1
ry water source is
Wetland floods or
�h wetland ve¢etat
Surface water connection to other wetlan.d
No adjacent Water Quality limited slreams
Adjacent land is primarily open space
Wetland buffer is between 10 and 40%
:i itation Wetland is less than 0.5 acre andnot cormected
ds Ad'acent land is rimaril o en ace
cover No adiacent Water Quality Limited streams
Wetland is not within 100 year floodplain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Water has unrestricted flow out of wetland
Stream modified
Water not taken out of stream
No adjacent Water Quality Limited streams
__ ..._...._ __ _
We.tlan functio are im a
d ns
P
>;.''�;<>'<,';'> >'_� :::::::::: :::::<:: Prim w er source '
«:<:>:;»; 'R� ar�t��,. _ as at is
N/A
Dominated
Urban uses
Adjacent land is pri
Adjacent zoning is p�
Dominated bv emer�ent
e ofwetland
of wetland
r,��
is be een 0.5 5
or de aded Wetland tw and acres
i itation Wetland buffer is between 10 and 40%
Potentiallv sensitive to future imvacts
No access allowed to wetland
No visi�ble hazards to public
o intact fish or wildlife, but both functions not
Maintained pul
Boat lai
Umnaintained
access within 250 feet
�ing areas exist
ls, viewin� areas exist
One Cowaxdin class is visible
>50% of wetland can be seen
Permanent visual detractors e�st
Public access to other habitats exist
Maintained public access point exists
Wetland is limited mobility accessible
itiai�:::o:: >Qr�uai��'
1?P :::::. : :..::.::.: �..........::::.... ..........
Wetland provides habitat for some wildlife
No fishing is allowed
No huntin� is allowed
Wetland surrounded by landscaped areas
Natural odors present at wetland
Some traffic and natural noises are presen
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: WI-02
More than one Cowardin class
Dominated bv woodv vesetatio
Less than 0.5 acre of open water
Surface water connection to water b
More than 75% of stream is shaded
Stream is in a natural chaYmel
<10% of streaxn has instream slructures
ry water source is
Wetland floods or
�h wetland ve�etal
Surface water connection to other wetland
No adjacent Water Quality limited streams
Adjacent land is primarily developed uses
Wetland buffer is greater than 40%
- �raded ; . ::::
No adjacent Water Quality Limited streams
Adjacent land use is primarily developed uses
Some non-salmonid fish st�ecies present in strea
;i itation Wetland is more than 5 acres
.ds A'acent land use is ' ' devel ed uses
cover No adiacent Water Quality Limited streams
Wetland is wit3�in 100 year flood�lai
Wetland floods or ponds
Wetland is more 1i�an 5 acres
Wetland has minor flow restrictions
Stream modified
Water not taken out of stream
No adiacent Water Oualitv Limited streams
Wetland functions are impa
Prirnary water source is
N/A
Dominated
Urban uses
acent land use is
jacent zoning is
Dominated b�
e of wetland
of wetland
�uses
uses
or de aded Wetland is more than 5 acres
i itation Wetland buffer is eater than 40%
Potentiallv sensitive to future impaci
Access allowed by permission only
One or two visible hazards to public
o intact fish ar wildlife, but bath functions not
Umnaintained
Boat ]
No trai
access within 250 feet
sg areas exist
�in� areas exist
One Cowardin class is visible
25 - 50% ofwetland canbe seen
Permanent visual detractors exist
Public access to other habitats e�st
Umnaintained public access point e�usts
Wetland is not limited mabilitv accessible
Wetland provides habitat for some wildlife
No fishing is allowed
No hunting is allowed
Wetland surrounded by natural areas
xipleasant odors present at certain. times
Continuous noise with natural sounds
West Linn LWI
OFWAM Functions and Cond.itions Summary Sheet
Wetland Assessment Unit: WI-03
One Cowardin class with >5 speci�
Dominated by woody vegetation
Moderate interspersion
Less than 0.5 acre of open water
Surface water connection to water b
More than 75% of stream is shaded
Stream is m a natural channel
10% to 25% of stream has instream siructures
uy water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is within 100 year floodplain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Wetland has restricted outlet
Stream modi.fied
Water not taken out of stream
No adiacent Water Oualitv Limited slreams
Access allowed by permission only
One or two visible hazards to public
etland provides diverse wildlife, intact fish
Umnaintained
Boat l
No trai
access within 250 feet
ng areas exist
rin� areas e�cist
One Cowardin class is visible
<25% of wetland can be seen
Pemiauent visual detractors exist
Surface water connection to other wetland
No adjacent Water Quality limited streaYns
Adjacent land is priinarily open space
Wetland buffer is greater than 40%
_ __. ... .. ... ..
No adjacent Water Quality Limited streams
Adjacent land is primarily open space
Salmon and/or trout present in sbream
Wetland is 0.5 to 5 ac
Adjacent land is
No adiacent Water
Dominated
Urban uses
�djacent land is
acent zo ning is
Dominated b�
or <0.5 and connected
iarily open space
lity Limited streams
_...... .__ ........... . . ......._...
_... _ ............... ...
_ ... .................. _........... . . .. .....
__.... ._. _ ................. ._ _ ..
........_..... ......._ ...... ......._ ......
_ ...... ........._........._ _.._....
....... ................... .._._._..
___.... __.. .. ..
_........__ _.._. _..
_ .......... .... ...
............... ..................... ...... _ .
� .... .... _....._... .._
�dy vegetation
ope ofwetland
�e of wetland
_ .......................... .. .. . _.........
_.. _ ......... .............. _. .... .....
_ .................. .. . _ ........
_....... .._._ ........_.._. _.......
_ _ .............. ._._..........
_...... ......_...._ ........ . .........
_ ........................
_ ......................
_ .............. ................_...... ....
_ .............. . _............... . .....
Larily open space
arily developed uses `
Other habitats can be observed not accessed
Unmaintained public access point e�sts
Wetland is not limited mob�ity accessible
Wetland provides diverse wildlife habitat
No fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Urtpleasant odors distinct and continuous
Some traffic and natural noises are nresen
West Linn LWI
OFWAM Functions and Conditions Summary 5heet
Wetland Assessment Unit: WI-04
More than one Cowardin class Surface water connection to other wetland
Dominated b emer ent ve etation and ondin One or more Water Qua1i limited streams
Moderate int ersion A'acent land is ' aril o en ace
Less than 0.5 acre of o en water Wetland buffer is eater than 40%
Surface water connection to water body
` �m a��ii::or:' ': raded
:.. ;
Less than 50% of stream is shaded One or more ad'acent Water Quah luluted stre�
Stream is in a natural cha�nel Ad'acent land is ' aril o en ace
<10% of stream has instream structures Salmon and/or lrout present in stream
�ry water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is withm 100 year floodplain
Wetland floods or ponds
Wetland is more than 5 acres
Water has unrestricted flow out.ofwetland
Stream modified
Water taken out of stream
or more adiacent Water Qualitv limited
Wetland fimctions are impacted or c
Prirnary water source is surface
Water flow is not restricted
Wetland is open to the public
No visible hazards to public
intact fish or wildlife, but both functions not
Maintained public access within 250 feet
Boat launching areas e�rist
Maintained trails, viewin� areas exist
Two Cowardin classes visible
>50% of wetland can be seen
No visual detractors are presen
Wetland is mare than 5 acres
Adjacent land is primarily open spac
ne or more adjacent Water Quality limited
_.. .._._ ...... . .... .. . ...._ .. ....._..........._.....___......_.
� ,: ; ;
Dominated bY emergent vegetation and p
Open space downslope of wetland
Urban uses upslope of wetland
Adjacent land is pri
Adjacent zoning isQ
Dominated bv emer�ent
and uondi
Wetland is more than 5 acres
Wetland buffer is greater than 40%
'otentiallv sensiti.ve to future ixnvacl
Public access to other habitats e�ust
Maintained public access point e�usts
Wetland is Iimited mobility accessible
o�p�iti�i�es
Wetland provides habitat for some wildlife
Fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: WI-05
One Cowardin class with >5 species
Dominated by emergent vegetation and ponding
Low in.terspersion
Less than 0.5 acre of open water
No surface coxmection nor waterbody w/in 1 mil�
.................................................................................
> ;z ....°° : .�. ...;. :
� . �,�a
�
Less than 50% of stream is shaded
Stream is in a natural channel
<10% of stream has instream slructures
;:.;:..:.;:::.;::.:. ;:.;::.>:.::..::.;:.
; , �»:::::::::
>::.::; . .:: .
;... ..;::::>::::>:::::::: ;::>:::.;::::.:. ; ::.:.;:.:.;:.;:..;:.::.
:;:<::: ::>::>::>::>:.>::>:::
Primary water source is precipitation
Wetland floods or ponds
High wetland vegetation cover
<:;:::>::�t ���ie�:
P . .::::::..:::
_
Wetland is within 100 year floodplain
Wetland floods or ponds
Wetland is less than 0.5 acre and not connected
Water has u�esiricted flow out of wetland
':::>::::'>::Fii��i� :>:.,, ;:.>:<.>:<:;>,> :
>;: <> ::>::;::;::;::>:::::; »<:>::>:::;:;:> ::<>:>::>::>: ;::>::>::»::>:
1...s��rs��r
»:::<::::>::>:<::>;<::::::>:>::>:::<:::::;:>::::>::>:> »::>:::<::::::::;::>::::::::...
Stream modified
Water taken out of stream
)ne or more adjacent Water Quality limited stream
>:l��i��rate:::��
Wetland functions are impacted or degraded
Primary water source is precipitation
N/A
Wetland is open to the public
No visible hazards to public
intact fish or wildlife, but both functions not
s»;>:: . ;:;;;: .: ;;.; . . , . . :.;..:
:;:::>;F�::»:<::: :>;>:c>::<:::;;: i
!Q't?1L��^ tCC�.,
Nlaintained public access within 250 feet
Boat launching areas exist
Unmaintained trails, viewing areas exist
>:::::>:::.:>���i
One Cowardin class is visible
>50% of wetland can be seen
No visual detractors are nresent
Surface water connection to other wetland
One or more Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is �reater than 40%
ne or more adj acent Water
Adjacent land is prin
Salmon and/or trout �
<>«>. ��:::`::::::>:>>::>:::::::::::>::<°::: <:::::>;:':=:
�.;:
� ... .. . . .... . .
Wetland is 0.5 to 5 acres,
Adjacent land is prin
ne or more adjacent Water
;<:>: et�: <::< :: ::: ::::>: _:<:::::::;::::>::::<:::;::>!
Id"" d
� ::::::::::::::;:.:::. :::::::::::::::: ::::::..
Dominated by emergent v
Open space downs]
Urban uses upslo�
Quality limited stream
iarily open space
�resent in stream
or <0.5 and connected
iarily apen space
Quality limited stream.
egetation and ponding
ope o�wetland
qe of wetland
Adjacent land is primarily open space
Adjacent zoning is prixnarily open space
Dominated by exnergent vegetation and pondi
l ::::<::>::>::, �,,�
m�n ���:`�:� : dt� k:;:> � .i;::;: �::?:?C::::i;::;:;:�::`>;:'��:;;��:::::;:::Y::;::;2 ::::::::::::::::;;:;:::;::;::;::;::;:;::;:;;�;�::!!%;�:!:
...........�. ...:::::: �t� .......::::::.......: :::.::::::::.:.�::::::::::::.:: ::.::.�:::::::::
.............. �
Wetland is less than 0.5 acre
Wetland buffer is greater than 40%
Potentially sensitive to fixture impacts
aria�:�i��es:::>::::::::::>:::::>::;:::::>:::::>:::: ::::::::>:>:::>:<:::>::>:::»;::::::>::::::::>::::::::>::::::::> :<'::::>:::>::::
Public access to other habita.ts exist
Maintained public access point exists
Wetland is limited mobility accessible
,
.> �:<::s :::::>:>::::>:>:>::::::::>::::: ::>; :>;:< :::::::::::::::::::::>:::::::>>::;::::::::;;::::> »»
[�. fl .. . ET1 �L1�'[T�,1� .::::: .: ::...............::::::: ...:.. _:::::. :...............:.::
_�?P :::....:....::....... _...........
Wetland provides habitat for some wildlife
Fishing is allowed
No hu.nting is aliowed
� I��iiibi ;:>:;::::>::>:::::<:»:::>::::>:::«::<:;:>::>::::::>::<::<::':>:::>::::::>:::«:::>:::»<:>::::::<:: : :::!:>::::::::>::::>
........,...� .......... .. ....... :,,................... .. .........
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are present
e
West Linn LWI
OFWAM Functions and Conditions Summary Sheet
Wetland Assessment Unit: WI-06
More than one Cowardin class
Dominated by woody vegetation
Moderate interspersion
Less than 0.5 acre of open water
No surface comiection, but waterbodv w/in 1
Less than 50% of stream is shaded
Stream is in a natural channel
<10% of stream has instream structuY
iry water source is surface flow
Wetland floods or ponds
�h wetland ve�etation cover
Wetland is within 100 year floodplain
Wetland floods or ponds
Wetland is 0.5 to 5 acres, or <0.5 and connected
Water has uurestricted flow out of wetland
Stream modified
Water tal�en out of stream
or more adiacent Water Qualitv limited
Wetland fimctions are ixnpacted or degra
Primary water source is surface flow
Water flow is not restricted
No access allowed to wetland
No visible hazards to public
intact fish or wildlife, but both functions not
Maintained
Boat
No tra
access within 250 feet
�ing areas exist
win� areas elcist
Two Cowardin classes visible
>50% of wetland can be seen
No visual detractors are presen
Surface water connection to otlier wetland
One or more Water Quality limited sheams
Adjacent land is priman`ly open space
Wetland buffer is �reater than 40%
or more adjacent Water
Adjacent land is prin
Salmon and/or trout �
� limited s�
pen space
in stream
Wetland is 0.5 to 5 acres, or <0.5 and connected
Adjacent land is primarily open space
ae or more adiacent Water Oualitv limited stream,
Dominated
Urban uses
�e of wetland
of wetland
� acent land is F
acent zo nin�u is
Dominated bv �
Wetland is between 0.5 and 5 acres
Wetland buffer is greater than 40%
Sensitive to future impacts
Public access to other habitats e�st
Maintained public access point e�sts
VtTetland is limited mobiliLv accessible
Wetland provides habitat for some wildlife
Fishing is allowed
No hunting is allowed
Wetiand surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
West Linn LWI
OFWAM Functions and Conditions 5ummary Sheet
Wetland Assessment Unit: WI-07
One Cowardin class with >5 speci�
Dominated by emergent vegetation and �
Low interspersion
Less than 0.5 acre of open water
Surface water connection to water b
Less than 50% of stream is shaded
Stream is in a natural channel
<10% of stream has instream structures
Gry water source is surface flow
Wetland floods or ponds
�hh wetland ve�etation cover
Wetland is within 100 year floocl�lain
Wetland floods or ponds
Wetland is mare than 5 acres
Water has unrestricted flow out ofwetland
Stream modified
Water taken aut of stream
or more adiacent Water Qualitv limited
Wetland fimctions are impacted or degra
Prima.ry water source is surface flow
Water flow is not restricted
No access allowed to wetland
No visible hazards to public
fish or wildlife. but both functions not
Unmaintained
Boat ]
No trai
; access within 250 feet
ing areas exist
Nin� areas e�ust
One Cowarclin class is visi�le
>50% of wetland can be seen
No visual detractors are �resen
Surface water connection to other wetland
One or more Water Quality limited streams
Adjacent land is primarily open space
Wetland buffer is �reater than 40%
or more adjacent Water
Adjacent land is prin
Salmon and/or trout i
limited
in slream
Wetland is more than 5 acres
Adjacent land is primarily open spac
ae or more adjacent Water Quality limited
'��
.. . ... _. _.
Dominated by emergent vegetation and p
Open space downslope of wetland
Urban uses uuslope of wetland
Adjacent land is pi
Adjacent zoning is pri
Dominated bv emer�enl
and
uses
Wetland is more than 5 acres
Wetland buffer is greater than 40%
Sensitive to future impacts
Public access to other habitats e�st
Umnaintained public access point exists
Wetland is not limited mobility accessible
tt�PQr�i�hes
Wetland provides habitat for some wildlife
Fishing is allowed
No huntin� is allowed
Wetland surrounded by natural areas
Natural odors present at wetland
Some traffic and natural noises are pres
� �A
� ��
� �� f ��� f �
C� '' �'
� � � c�
�Nd P _ /
Appendix D
Wetland Data Sheets
/.� , �?�: ., f �.� �. _ ' , 3
�G.Y.'Gt � �lU.r-� � `�_��� � §
t
WEST LINN LOCAL WETLAND INVENTORY
; r� , i � �
,� , OF%V �-�`i '�le.��� vr �- ,
0
Wetland: �.e'�"wr.c..�.�� v. �' (,�J o=n.@�', �=tr Code: j�— Cr..�l��
Location (add/tax lot): j,�,��,,,�� �'�, �__ E �,p �;,,�, Plot #s (or off-site) �
Cowardin/HGM class: ,�G i�✓� /,� F% � 5�/ ' Field date: �- L�- �s 2...
Recent Weather T Investigators: 2� �W
Summary (topo, land use, basis) -T _ .� ��,. ��-�'�;
��
Has the soil, vegetation or hydrology been significantiy disturbed? �,/OT .-M.t1�..:•, �-�:.�.,
/ status
% Cover �¢b' Herbs % Cover 9 -r',_,�'
_ _ __ —__
% Cover i)om. Species / status % Cover pom.
��1�.+,� lq.h�-1'vs DrL _ �- a ii
;st hT71 V p1
Sapling / Shrub
'�a+bV� cli5col
Other species:
% Cover
'�ut���s fiaKi
v ,,%
r
Percent of species that are OBL, FACW, FAC: > °
Criteria met �D -�1'�.c?,,.�-�+_�:.,,.� r� ��. t� `'ts';=s�a�'�}:'�*�
\ ' �� p-� o+'+. �Ow+1�'t� F a
Map Unit Name: �
TaxonomY� ' r i
Matrix
Depth Horizon . Color
o-y lay,�
�'�—�" �D�i2 �
Q i,..'���i /n uR c
Redox Concentrations*
Texture Structure
� Hydric Soil Indicators "
Histosol Concretions ! Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
3ulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
- Gleyed Other
� Redox. features w/in 10 inches
Criteria met? � * abundance / size / conh / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge °
No recorded data available Other
Depth of Inundation: �- Depth to saturation: Depth to free water: --
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or mare)
Inundated �/ Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Dri$ Lines �— FAC-Neutral Test
Sediment Deposits Drainage pattems
Criteria met? �� pther:
Wetland? /,d Functional summary:
Significant?
Drainage class: ��� d /'Gt-tvl �,�
On hydric soils list? �,/�r _
!�
�b
✓ � � �,
✓ WES `LINN LOCAL WETLAND INVENTORY �` l��
�4
Wetland: �:�`ir.Frr ",�-�. �,.��; a�ff� �-,r Code: ���..� �� ~�'`s� p�ran�
�
Location (add/tax lot): �,,, �a- o � �, �, , �� ,j,` �„�,, Plot #s (or off-site) -,�L.
� �.,:, �
Cowardin/HGM class: � E M /s {/' Field date: 1_ z z- v 2-
� Recent Weather � Invesrigators: '7�"?
Summary (topo, land use, basis) �� ,�p a-� .l_ • 20��✓h,�,-�r :�, .»'�-ri-a `
,
Hydric Soil Indicators f
Histosol Concrerions / Nodules �w/in 3' ;> 2 mm)
Histic Epipedon High organies near surface (sandy soils).
Sulfidic Odor Organic pan (in §andy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
_ Gleyed Other
Redox. features w/in 10 inches
Criteria met? et � t� _ * abundance / size / contrast / color 1locarion (matrix or pores)
Recorded data�available Aerial Photographs Stream gauge
No recorded data avail�able Other
Depth of Inundation: Depth to saturation: Depth to free water:
Hydrologic source: .
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Brainage pattems
Criteria met? J�( Other:
•; - •� Wetlan. d? ��_ Funcrional summazy:
Sign�cant?
Has the soil, vegetation or hydrology been significantly disturbed? ,�` . � +•� /�fi � e.a.��
Map Unit Name: � ; t ,, r .yr� Drainage class: � O(YG6 /d1 e o(
Taxonomy: �i' P f�� t/ 4 � a ,�„ (� On hydric soils list?
Matrix .
/ ��. . ^I ^ ' ( - C ,� E...V T. I�7YV�' ��L-�.1�: K 4 '. ; . '
�..i,�4t- " l-j'` �' � �'"
�� ��� �� WEST LINN LOCAL WETLAND INVENTORY
�—
Wetland: (,�.tiy:,L'�.,,�.��. D�}� Code: (9�� ��
Location (add/tax lot): 4 a r a., ., ` Plot #s (or off-site) �1
�-�--
CowardinJHGM class: �E.yvt/ ���cs�,- S V Field date: ,r�= �- d Z
°''::�'' Recent Weather ��� _ I% ��t., Investigators: � i�u� �Y,"L
Summary (topo, land use, basis)
� Has the soil, vegetation or hydrology been significandy disturbed? /J�
Other
Percent o€ species thAt are OBL, FACW, FAC: l D D
Criteria met? H�=
Map Unit IVame: (,�J�' t r S!'� $'r `. rainage class: f:e� // d/'Q.[ n.OG!!
Taxonomy.. �i t1,ic, //��C. a.P axero On hydric soils list? �n
._ Matrix • .
Depth Horizon Color Redox Coacenttations* Ralox Deuletions* Texture Struct�e
Hydric Soil Indicators
� Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon ' Iiigh organics near surface (sandy soils)
�/" Sulfidic Odor Organic pan (in sandy soils)
• Reducing Condidons (tests positive) Hydric soils list and profile matches
Gleyed Other
✓ Redox. features w/in 10 inches
Criteria met? �,� � * abundance / size ! contrast 1 color / location (matrix or pores)
Recorded data available Aerial Photographs Stream �auge
No recorded data available Other
Depth of Inundation: -� Depth W saturation: _S c�,�. Depth to free water. ���
Hydrologic source: 5r� GFw►4 - �xXr��� — G�IDu.r�'_r,.i�L`�`rrvi' uY <<�.� '
Primarp indicators Second ry Hydrology Indicators (2 or more)
Inimdated � j ' ✓ Oxidized root channels (upper 12")
_� Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data �
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage patterns
Criteria met? 2'� Other:
Wetland? i.,�� S Functional summary:
Sign'dicant?�—�
.✓ `"— �� ` � G��c..�,
WEST LINN LOCAL WETLAND INVENTORY
Wetland: /►//� Code: G/�- �1
Location (add/fax lot): C ,4 -o � � ' Plot #s (or off-site) ��.
__� Cowardin/HGM class: -��a p�� Field date: �_ .c�!—� �,.
-- Recent Weather - � Investigators: �.. t,J ��
Summary (topo, land use, basis) �yy� ��� �.Q,� �'�- �Qd.,pp W C', �
Has the soil, vegetarion or hydrology been significantly disturbed?
Matrix
D th Hori2on Color Redox Concentrations* Redox D letions* Te�cture Strucwre
�} .. �� !da �,� '� °'°'
r
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic fipipedpn High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soiis)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features wtin 10 inches
Criteria met? � * abundance / size / contrast / color / locatian (matrix or pores)
Recorded data available Aerial Photographs . Stream gauge
No recorde3 data available Oiher
Depth of Inundation:. Depth to sahuation: "�'� Depth to free water:
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
� Inundated Oxidized root ehannels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Loca] Soil Survey Data
Drift Lines FAGNeutral Test
Sediment Deposits Drainage pattems .
Criteria met? _ j�, �j . Other:
Wetland? �1 p_ Eunctional summary:
Signiticant?
Other species: � �ati,�,�,� �.t �Q. . ��,��.� f�� - �V✓
�--�
Percent of species that are OBL, FACW, FAC: ��
Crlteria. met? � "
� ^ co � ��� � �,�� , ��,� 1 ,,,�,., , ,�,,r-., r ,, —., _. —
WEST LINN LOCAL WETLAND INVENTORY l �
� D
W�land: ��c.��..�.. N R ' Code: �- D Z �� �
Location (add/tax lot): � � .���{. _ .,. ,r zv; Plot #s (or of� site) #J (�� ���,�'� ; �rJ�'iL f� �
i� Cowardin/fiGM class: �5'� DC� �r �C-P.1P ? Field date: �'-�=�Z . p�
. Recent Weather .�, ' Investiga:tors: � u3 , �4-f�.
SummaTY �topo, land use, basis) '
Has thE-soil, vegexation ar hydrology been significanfly disturbed? �) 4
'Trees ;; �- � < ' _�% Cbver t - Herbs s;:. ; % Co�±er
,_
. S ecies / status,...°` %`Gover ' , . I7um: S ecies �/ s�atus ` % Go�ter`. 'om,
- . � rc �
� � '
' - ' • . . . �. ... . . �. . . . .� . .. _ .._ k -" � " . � � � # .
5apling / Shrnb _ _ % Cover ° _�op�. .
. � t � �,, , �
c�. � =fU . _ -
1
Other species: • -
�u.r,� � �SsM.�, f':?�.:E.Cst� _ � � a . �°.u.e�t ,.:� ' _ r�.�:: � ��.�e, f�' '' .
Percent of species that are OBL, FACW �'AC /�) , r .rK• ` �,,�,L }�
_: �,� ��G��. . ;,
Criteria.met? . .._, .. . _...., ::, . ,.:. . .,� _ _ _ `� :. .
Map Unit Name: f,V j� t�. y <- Dra�nape class �- Lv�1l ,�rG�. r�o� f-. :. �,.. �
,-� Taxonomy: G;' �' �c :� i� - '�` oke•ef On fiyd ic soiis lislft n v :
Matrix . _ _
. ' D th `Horizon Color RedoX Concentrations*� Redoz D letions* Texture Structure .
' ►ao � � °°-' �.{.�� � � �,�.�.e.... �C.r' tu.w�-e_. a � � � . ..G.�..,a->- :..c�-
` s -
� Hyt�31C So� �II�C8t01'8 ' - . . .
Histosol � - Concretim�s / Nodules (wlia 3"; > 2 mm)
' Histic Epipedon . � " Iiigtf organics near surface (sandy soils)
� Sulfidic O�dr ,_ _.. . Organic pan (in sandy soils)
Reducing Conditions (test� positive) Hydric soils lisf aitd�profile matches
� Gleyed - � Other ,
Redox. feaitu�es w/in'1U inches . �
. Criteria met?. - . . - * abundance / size / conhast / color / location (matrix or Pores) • .
� R�corde.��data available , < , .. .,. .. 4 , .. Aerial Photagrapl�s ; . ,, - �, -_ Stream�;gauge
�� _ — � .,A —..�— •. ,
•: - . ;. . , .. , -
� ,. No reco'�ded data availabl�z ° ` .. Ottier '. `
Depth of Inundatiori: ��� Depth to satiu'adon: . _ Depth to free water: � �
Hydrolo�c source: �v-r'a �.u�.,i � (� tr2 Zd.✓� � _ . .
, Prinar� indicators Secondary Hydrology Iadicators (3°or more)
✓ Inundated Oxidized root-ehannels (uPPra' 12")
Sat�it�ated 'm uppa 12 inches ` - Water-stamed leaves
WaterMarks Local Soil Survey Data
Drift Lines , _ FAC Neutral Test ' •
Sediment Deposits . , Drainage patterns
Criteria met? � . � Other•
` i Wetland? � Fu�ctionai su�ary; .
Significanf?
�/ .: �: d� .�t`�' ��-�X.�:�,
WEST LINN LOCAL WETLAND IlWENTORY �o�
� . j �¢.. P . 1� � ���
w��a: ��..,��. � � ` coae: ��
Location (add/tax lot); � .�i,� ,,� �„�r� � �� < <�.�,nr:. a_.�' ,i #s (or off-site) �-� .� �:M P� � ,�� �� (� �
�-T-,, Cowardin/i3GM class: �-+y�/�' , ''��Field'date: � . -
,
�` Recent Weather :Investigators.... :
Sumn?ary (topo, land use, basis) 1l2' a�r� e,R.� �"�r� !' .� z.� �....� �' ,��r ��°�'-�.�
Has the soil, vegetation or hydrolugy been significantly disturbed7 _. ��r
, ..
_. , ,�
;�; _
_.-.��
Pero�t of species that are OBL; FACW, FAC: � 5Z� .'. ., :
. �
Criteria met? nl (3 . '- _
r� , � �. . _
�t �.:
Map Unit l�iame: �
Taxonoiri�:� � ' �
Denth , Horizon
Mah�ix "
v L r
Textiire
, Hydric Soil Indicators . .. _ , . . _
Histosol � _ Concretions ! Nodules (w/in 3' ;> 2 mni)
I3istic Bpipedon : °" « ' Iiigh oiganics near surface (sandy soils)
Sulfidic Odor .. • Organic pan (in saudy soils) "
Reducing Conditioas (tests positive) Hydric so�s lisf arid profile matches
- Gleyefl � ' : . - Other ..
Redox. featiues wlin lfl inches ,` :
� Criteria met? . � * abundence / size ! contr�st / color / location (matrix or pores) •
Recbrded data availaFile Aerial. PhQtographs � ,_:�. Stream �auge
? No r`eeardeci 'dat$ a_v,ailable ` Other '
Depth of Inundation: . w Depfli to,sahuation: Depth to free water: . �
Iiydtologic source: ,�rp,C� _ J
Primary indic$tors . : Secondary Hqdrology Inr�iicators (2 or more) ` .
: Iriundated _ - Oacidi�ed root- channels (nPPer 1.2")
Saturated in upper 12 inches . . Water-stained leaves •
Water Marks . Local Soil Survey Data •
Drift Lines ' _ ,__ FAC-Neutral Test ' ' .
Sediment Deposits . Drainage pattems
Criteria met? �j ! Other: :
i
,
Otherspecies: - - .. ;_. _ _
. ' F> ';� i 'f' �� D ti . ..... . . . . . ... .._... . . .. _.. . �. _ . ... .. . . .� .
' .� d� ��--��� c �
WEST LINN LOCAL WETLAND INVENTORY
r
WeUand: i �.�� a_: �,1 � Code: /�.1�. .'���
s
Location (adclltax lot): �:�t,;; �--� �;_ ^ Plot #s (or off-site) �k�'- CsFS.� t y� � /a �m ►a
Cowardin/HGM class: ' ,,,,� , Field date: ` ,���'_ �,=- �'�-
Recent Weath� ,,yu,�. _ Investigacors: �tij �q b/
Summary ,(topo, iand use, basis) �
� Y SY 8� Y � ' t��1 ,. .- _ ::
Has the soil, v etation or h drolo been si ftcantl disturb , ,
. � ' ' . .. _ . . . . aY.sa, .. .. _ . � ... . .. .... . ... _ ' � k .
TI'CPS _ . , . % C6VCi _,
Species / sfatus .: - _ . . %o� Cover : I
fO��c�'r,c�Q. �il�PfYiA+l�t�i'"t�.E,.^ - ��f r: �. � �.. . �
Sapling 1 Shrub °fo Cover
_ � . S . � . _ _. . � _ �
��
�-
��
�s
$ ,, ,_,_ _ . °1
es �st8tus %o
55C�i'� tS#;_ f1f� ,/1 �-t C�'�
� ; ,
✓
-
-�
N
� ��
, p
. -�-.�
Othet species; .`�.e�` � � � �R. .:�' .�m� ~ - � �` � 1'�Wi.2i t�i�ii �;-�'�'^;r.` .� t3� �eti!„+u..-� '1va,�5 ►,lfsrl
° ' �UIP.�'' a
n ��
Percent of species that are OBL, FACW, FAC: ,�. DD
Critena met?� _ '�,,T - , , s . _
-r
�
Hydric Soil Indicatars
Histosol Concretions / Nadules (w/in 3' ;> 2 mm)
Histic Epipedon , High organics near surface (sandy sbils) .:: .
SuIfidic Odor Organic pan (in sandy soils)
Re�ucing Conditions (tests positive) Hydric soiis list a�d pxofile matci�es
Gleyed _ Othea
' Redox. features w/in l0,inches _ °>_: . . ._,
Criteria,met?> � . s abtinciance ! s�ze / cantrast / c;oior / (matnx oFpores) �, `
x . �} ��. ��
Recorded data available : Aerial Photographs :,; : Stream gauge '. ``
No recorded data available Other �
Depth of Inundatiog: � �;� De�,ith to saturarion: � Depth to free water:
Hydrologic source: y��,wee�� ( ?
Prima indicators Secondary Hydrology Indicators (2 or �nere)
� Invndated Qxidized root channels (ugpes 12°)
Saturate3 in upper 12 inches: Water-stained leaves
Water Niarks Local Soil Survey Data
Drift Lines . FAC-Neutral Test
Sediment Deposits Drainage patterus
Criteria met?� ` I ! � S` , , . � Other: "
--r1- __
Weda�d? � Functionai summary: . � �
Significant? _
Map Urrit Name: : Drainage cT'ass:
Taxonomy: On hydri� soils list?
. . .,� ,
„ .. _ _
Matrix _ , _ � _. . _ .
��� � �� � �
Wefland: �
Location (addJtax lot}: -�
Cowardin/HGM class:
.'`;-� Recent Weathea ��
Summary (topo, land use, basis)
WEST LINN LOCAL WETLAND INVENTORY
. ss �
�_ c;ode:
Plot #s (or off-site)
Field date:
DS ��5 �uvYtsv � /�-u� � ` . �' - �a�c C-� U _
Has the soil, vegetation or hydrology been significandy disturbed?
Nd �
Trees
Species / status
% Caver
o Cover
Herbs
Ja�
^ -_�(t si-�eu,6r�3
Other species:-'7��
a
. � N�
. �.��
� �.:�t..�i
I: � SJ!s��
; � �: i�
.: . �� ��►.�
�:� � _
Percent of species that are OBV� c CW, FAC: __ 1 p-O
Criteria met? �!
Struchu�e
. '$ydric Soil Indicators
Histosol . Cottcretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surFace (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) � Iiydric soils list and profile matches
Gleyed Other ,
_��Redox: features w/in 10 inches
Criteria met? f� ,* abundance / size / contrast / color / location (matrix or poresj
�/ Recorded data available
No recorded data available
Depth of Inundation: N p.
Hydrologic source:
Primary indicators
Inundated
�/ ` Saturated in upper 12 inches
Water Marks
Drif! Lines
Sediment Deposits
Criteria met? tA l.�
Aerial Photographs Stream gauge
nthrr
Depth to free water: $ u
�
Wetland? Vy r!� Functional swnmary:
Significant? T,
�econaary tiyaro►ogy lnaicaiors �c or murn�
O�cidized root channels (uppe� 12")
��_ Water-stained leaves
Local Soil Survey Dats
FAGNeutral Test
Drainage pattems
Other:
Map Unit Name: L{J���/ h.r Ir► ' Io�,YYt Drainage class: ��,,� // �/il��.vu�ad
Taxonomy: / fti,G (Jf��G ���,�� On hydric soils list? 11b
Mahix . . .
WEST LINN LOCAL V�'ETLAND INVENTORY
Wetland: /,r�2 van . � �rl�e_:�sv-[ Code: � -�} (0
Locarion (add/tax.lot): Plot #s (or off-site) �'Z ' '
Cowardin/HGM class: � - Field date: �/<! cs Z
Recent Weather �'r��a�m,� _.3''�t e}.+�✓� Investigators: '7� "B, f?-K
3ummary (topo, land use, basis) ,�:�o,.n f>dp, x~t�s� v-��, a.ye�,a �S . ��-�ra� �� tz�.: no2��n.. .���- C� �
Has the soil, vegeta.rion or hydrology been significantly disturbed?
NO -
,. Percent of species that are pBL, FACW, FAC: Zo
Criteria met? /�/`Q
�� Map Unit Name: . �/.' f !/.� ; ,, } . : " Drainage elass: Lve/C .G�rza.:t sa.
TaxonomY� L, i�6r �� ///fi� ��ex.t.-af/S On hydric so.ils list? d! a
Mahix •
Depth Horizon Color Redox Concenirafions* Redox Depletions* Texture Structure
_ ',, �r 3 oy.
_ .. ,_ d' '{ � �
!� .G 3
Hydric Soil Indicators :
Histosol Concretions / Nodules (w/in 3' ;> 2 min)
Hi.stic �pipedon High orgazucs near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests posirive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
' Criteria met? /�/7J' * abundance / size / contrast / color / location (matrix or pores) '
Recorded dafa available Aerial Photographs , Stream gauge
� ' No recorded data available Other
Deptli of Inundation: Jj�.e Depth to saturation: �p� � Depth to free water: /jr/y, .c.
Hydrologic source: •
Paimary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
` Saturated in upper .12 inches - Water-stained lea.ves
Water Marks Loca1 Soil Survey Data
Drift Lines FAC-Neutral Test
� S.ediment Deposits Drainage patterns
Criteria met? . �I � Other:
�
Wetland? /Vb Functional summary:
Significant?
� � ,���,: w� -�c�= �,,� I�
�.
WEST LINN LOCAL WETLAND INVENTORY `
N���
� �
Wedand: �f/. �,i� �, c:ode: �/�-Q�� ,_�<:�. • /
Location (add/tax lot): ^ � Plot #s (or off-site) � "' _ (21' -t ��y,J-/ � � -
Cowardin/HGM class: � . . ��• j ���
" Field date: t} . �(�. G Z
. Recent Weather � p� , ~ vestigators:
Summary (topo, land use, basis)
O�J �5�$ �uYY�� � � � � � [��.s�
Has the soil, vegetation or hydrology been sigiiificanfly di�turbed? ��' ' U
. . - . ' '.. !,-. 4
. �� � t .. .. . � . .
Trees % Gover �p
S ecies / status % Cover pom.
_ Wrt Yu�S �l,�i �i A �
Sapling !
���
f.�t�5
% Cover
�.
:r�s
ecies / status
�I�,hg a inAceot
0�5 ( ��s
lvtta,.S e �5
a�ah� S S
�+r�� S �±�
_...� ,
% Cover pom. = ,
oth� ����: -�?'� ,(�s2�,da �5.� wio� � e,s � 41,a lti c�c s, d�S ce Ce�r_ �' i t� d s�.
v
Percent of species that are OBL, FACW, FAC: �
Criteria met? Y� s
Map Unit Name: Drainage class:
Taxonomy: On hydric soils list?
Matrix • "
vl
. '$ydric Soil Indicators
Histosol . Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) � Hydric soils list and profile matches
Gleyed Oiher .
_�� Redox. features w/in 10 inches
Cr3teria met? ��'h _ �* abundance / size % contrast 7 color / location (xnatxix or pores)
• �/ Recorded data available
No recorded data available
Depth of Inundation: N A
Hydrologic source:
Primary indicators
Inundated
�/ Saturated in upper 12 inches
Water Marks
Drift Lines
Sedirnent Deposits
- Criteria met? L1 t�'J
Aerial Photographs Stream gauge
. O�dd�� $ t�
Depth to free water:
�
Secondary Hydrology Indicators (2 or more)
Oxidized root channels (upper 12")
o/ Water-stained leaves
Local Soil Survey Data
FAC-Neutral Test
Drainage patterns
Other:
Wetland? V� �l.� Functional summary:
Significant?�� '�
� �J . ���.�.�,�.�
�' - _o�
� ��o�
� ���,,� �y� _ �o�
�c.-� T- �� �,� �" ,j -��� h���x �l�✓"
FP � a;��� ��� �R�
Ps��b� �, �;�� �`� �� � ��i�s '�`� f � �� �
'h.� ¢�r
Qu _� � ?' � . �. ��
s
� av . �� S�,s SQ.+iuS�" '""`c-'
��S rv�cv►�e54� . �� p (
N►��1 �,�5n� ��
. �� . . `�, � . ;
��� `,,� � ° , �, . ..�
��� � �olVt,
;
� � L�
�-
D-- 2'' Ioyl� 3��✓ lo�o
7,5 �R --�'/�j . �°�� �_ _ :
�.h� � �x 10 �� 31�
�� �c�On��
� Yflt�_ ��
___-
�-�{ -"� a�. t-� �+�y u.G - Cyiv�n-k ri ;,%�%
a
��
t��-�-
Nr� } � �i�v n�12�►1 � r�r � vJr.�e„r �1.�, '�'
�
�.
� 6 f �ti ���
�JQ� W�"i,.�N �? : t�„� •. ���,.. vv�-e, a.� ��e �
�- e�--��,,� - po v � �C- c�� w�
�..
�
� - ��.f'ct� �-r� r c,e-,y�:��: <
n. � , �,
� � (�et�' �-.
ti�fl,,e Ca �tf� � �;
WEST L�NN LOCAL WETLAND INVENTORY
� ��_
�. ""__`°`- � `�
-�.�" �.
.��,..� ����=�._..,--,
� � �---_ .
� ....�."': . � .�5-•
_. . � j
G�.—ol � _ _
�1 ----_., - �
.c!- �-�- 0 2.�
Wetland: ,� �a� , • Code: -
Location (add/tax lot): ` �� � , �� �,,,,,,,,� , , Plot #s (or off-site)
Cowardin/HGM class; �� /�i �!7"` Field date:
Recent Weather ' ' Invesrigators:
Summary (topo, land use, basis) �� T„�,,� „I ��,�,,,�. �'�,�1 _ ��1
Has the soil, vegetation or hydrology been significantly �disfurb�?
Criteri9 met?
Map Unit Name:
- Taxonomy:
Depth H<
�-�P _
/ _ /
'e.ro �h'��'1'�S'1—.h`�P�sX�.a/!S'
Matrix C/
Color Redox Concentrations*
r. c1041� � _
Texture Structure
�5'a�`r'�,,nG {�a�+-� i��� - Sau,n�.�i' ,G-'�z.�J ccresc�w
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon � High organics near surface (sandy soils)
Sulfidic Odor • Organic pan (in sandy soils)
Reducing Condi6ons (tests posi6ve) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? � * abundance / size / contrast / color / location (mahix or pores)
Recorded data available Aerial Phofographs Stream gauge .
No recorded data availabie Other /%� �' �-�� �d "�'`''�
rr
Depth of Inundation: �—� Depth to saturation: �.c¢� � Depth to free water: � it,� /D �"'�"- •
Hydrologic source: � ���+ , . �� � ,�f.�,�,
Primary indicators Secondary Hydrology Indica ors (2 or more)
Inundated Oxidized root channels (upper 12")
_�� Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage patterns
Criteria met? � Other:
Wetland? �o,� Functional summary:
Significant? �
� � � .L��^�- w.�'- �° �.-� .
�o
Drainage class: /,+n°I� rt� af.sf&r�,c� �•l�DO���� ��7'CDGt.a
On hydric soils list? �?p �1��(e„� ¢ef , c+�e
��y-��� .<.� ,�;
s
-✓ .`�,? � , C.m� �'"�`.�>
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �,t;�` � • Code: C �`- d�
l:J.� Ll/` �
� Locarion (add/tax lot): �i,��r��,� �, �,, ,2,n,�ie,n,�.�.,,�cJ #s (or off-site) � Z .
Cowardin/HGM class: Field date: .�_) �_ d�
.::�
Recent Weather Invesrigators: �� ��
, -
Summary (topo, land use, basis) � �y, ( ��,�.¢;,��"'-- � �--� G ��,--u.,� � 1
�
Has the soil, vegetarion or hydrology been significantiy disturbed? p/ry
Other species:
Map Unit Natne:
. �� Taxonomy:
ti� ' u" On hydric soils list?
Matrix �
�LJ .��-�a�ie� w�d�dr ���o�
y � r-r�l� �-� f� �� � '��
� ..
Horizon Color Redox Concentrations* Redox Depletions* Te�cture
3 �-
,_-._ ___.
�
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profsle matches
Gleyed Other
Redox. features wlin l0 inches
Criteria met? t.f D * abundance / size / contrast / color / loca6on (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: Depth to saturation: Depth to free water:
Hydrologic source: ,� •
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated O�cidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage pattems
Criteria met? n/p Other:
' �� Wetland? �_ Functional summary:
Signiticant?
d�'r�
Percent of species that are OBL, FACW, FAC: � S' °��
Criteria met? i�a,s
WEST LINN LOCAL WETLAND INVEI�TTORY
Wetland: �� Code: �.LS'"O
Location (add/tax Iot): ��,�yt�( . Plot #s (or � ��� , ��
Cowardin/fiGM class: b Field date: Z
Recent Weather Investigators: �_. .
3ammary (topo, la.nd. use, basis) d O
Has the soil, vegetation or hydrology been signi&cantly disfurbed? �L'
Map Unit Name:
Taxonomy:
�pDe _th Hc
b. �il
Hydric Soil Indicators
Histosol Concrerions l Nodules (w/in 3"; > 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Suifidic. Odar Organic pan (in sandy soils)
Reducing Conditions ,(tests positive} K�dric soiis ]ist and profi}e matches
� Gleyed Other
=1/ Redox. features w/in 10 inches
Critcr[a met? '� � * abundance. / size / conhast / color / location (matrix or pores}
.
<� �v�
atn,�aA
Reco�ded data available Aeriat Photogrgphs . Stream gauge
No recorded data available Other
Depth of Inundation: �IEl��,,. Depth to saturatioa: �j �► Depth to free waier: ��� � .�
Hydrologic soarce: �5 ` � ��
Primary i�tiicators Sec nda Hydrology Indicators (2 or more} $ 1
Inundaied � Oxidized root channels (upper 12")
✓ Sahirated in upper 12 inches Watex-stained leaves
. f Watsr Marks Local Soil Survey Data
Drif� Lines FAC-Neutrat Test
Sediment Deposits � Drainage patterns
Criteria met? l({�, � Other:
Wetland? �� Functionat sumc'�ary:
Sign�cant? �
Other species: .
Percent of species that are OBL, FACW, FAC: t�
Criteria met? 1�� . •
Xe�o�i. Tro,�s r./�fea���e/ls' Drainage class:. i.�rpl/ �.—�udl /,tlarict
�� " Ou hydric soils list? h� �/,�
Matrix �
� WEST LINN LOCAL WETLAND INVENTORY
Wetlatld: �'�.4.G�2 G � Code: , ,�1�� . � .
'� Location (add/ta�c lot): �d lof #s (or off-site) �
-� Cowardin/HGM class: � Field date: 2 6 Z-
- Recent Weather - Investigators:
Summary (topo, land use, basis)
Has the soil, vegetation or hydrology been significantly disturbed? 1�1p �
�
• U
Sapling I Shrub % Cover
Qe!w�c.ria ce.rn.c.i�a�,�,a. t Lh
�u�ivs�#r��.lis
' ua l� -
Other species:
Percent of species that are OBL, FACW, FAC: Q
Criteria met? �p
.��, �Iap Unit Name: � ror� �e,ofs w f{�h/oat er-alls Drainage class: w�e.1/ r� a��,t�.s�.�cr
) Taxonomy: t� " On hydric soils list2 ylv
Matrix - ; : � -
� D th " Horizon Color Redox Concentrations* Redox D letions* Texture Struclure
�-« r� y g � -��
_ Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High arganics near sur�ace (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Condirions (tests positive) Hydric soils list and profile matches
Gleyed : Other .
I�iedox. features w/in 10 inches
. __ _
'' Criteria met? No _ * abundance / size / contrast / color [ location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
' No recorded data available Other
Depth of Inundation: N�r Depth to saturation: /t.O Depth to free wafer: k,G1c.0
_ Hydrologic source: �� . •
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 incties Water-stained leaves
Water Marks Loca1 Soil Survey Data
Drift Lines . FAGNeutral Test _
Sediment Deposifs Drainage patterns �
�.
Criteria met? /�/ 0 Other:
,
_ Wetland? ���, Functional siunmazy:
_ Significant?—�—
woaa,�a:
Location (add/tax lot): ��
Cowardin/HGM c(ass: ��,c
Recent Weather " v�;
Sununary (topo, land use, basis)
Has the soil, vegetation or hydrology been significantly disturbecl?
�� �
Trees % Cover - �i�ef� Herbs
/ status
u� la��►ib
% Cover
canling / Slirub
�bus s���-��b�[.�5
Other species:
% Cover '� ..
�� -- oZ
7�� I
1 .
% Cover (�
s / status % Cover pom.
riu�, - f i�; x- u - ✓
�LU�s } . • ��`.
NS M1(.St7CQ/,n4li � ' �� ,� �
�.e.w tia �f?sG
�luM ro�Y-�'iqn_�"A / � ----
Percent of species that are OBL, FACW, FAC: OO �
Criteda met? �/FS
Map Unit Name: �GD�
Taxonomy:
atrix
D th Horizon Colur
4�/f lhV,r�.
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Conditions (tests positive)
Gleyed
Concretions / Nodules (w/in 3"; > 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydrie soils list and profile matclies
Other
t/ Redox, features w/in t 0 inches
Criteria met? �� * abundance / size / contrast ! color / location (matrix or pores)
Recorded data available i j Aerial Photographs Stream gauge
,/ No recorded data available Other
Depth of Inundarion: /J� . Depih to saturation: ��� Depth to free water: t��'
Hydrologic source: /,a � � �,��' .
Prinnary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
r t� Saturated in upper 12 inches
Water Marks
Dri8 Lines
Sediment Deposits
Criteria met? �_
Concentxations*
Drainage class:
On hydric soils list?
Texture Structure
Hydric Soil lndicatars
—�— Water-sta4ned leaves
Local Soii Survey Data
FAC-Neutral Test
—�— Drainage patterns
Otheri
Wetland? �. Functionat summary:
5ignificant?
WEST LINN LOCAL W�TLAND II�VENT�I2i'
VVEST LINN LOCAL WETLAND INVENTORY
Wetland: � (,yp�� : • Code:
Location (add/tax lot): orG( /Z.�iP.�j 3' o%�� PIot #s (or off-site)
Cowardin/HGM class: {�'jt7(_ � Field date:
Recent Weather �Z, L. �� „�nvesti tors: �
Summary (topo, land use basis) 5" �� -CIy'�--��
r G �
Has the soil, vegetation ar hydrology been significantly disturbed? I W�
Trees
huS r'^
A1n45 S
Sapling / Shrub
.�ul��s �.�Gb,l�s
ubuS �1541i�o�'
ce r ei ��� n ��u �,
G'ther species:
% Cover �
% Cover pom.
�.�
% Covet
�_r� ✓
/ (� � ,i
U> �
� ��
/ status
t i yc ,
� fV�Wnt
-�-�, _.� A y
°I �'�a�
�' � ' A7Gl�s.�.S�
% Cover pom.
Percent of species that are OBL FACW, FAC:
Criteria met? , a"j) :
Map Unit Nazne: D o
Taxonomy: p
ahir
Depth Horizon Color
Dra.inage class:
On hydric soils Iist?
Redox Deplerions* Texture Structure
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
G Other
Redox. feaiures w/m 10 inches
Criteria met? � * abundance / size / contrast / color / location (matrix or pores)
Recorded data available 1/ Aerial Photographs Stream gauge
� No recorded data available Other
Depth of Inundation: � pepth to saturation: _��n Depth to free water: �',� ��'
Hydrqlogic source: __ � j� j�j//�„' . .
Primary indicators Secondary Hydrolog,y Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stamed leaves
Water Marks Local Soil Survey Data
� L�� FAC-Neuhai Test
Se3iment Deposits Drainage pattems
Criteria met? � p��
VVeUand? (� Functional summary:
Sign�cant?
� ..w-�v.- v n.x.K-� v�• r .��.. c ...e....
�T—,. ��'��'YLh"r�.l�...;"2.�k (}..ts .
` - WEST LINN LOCAL WETLAND INVENTORY
Wetland: � r i�f[ �2u �''-P �PlC. Code: l�ie – L��
Location (add/tax lot): Plat #s (or off-site) � •
Cowardin/HGM class: ",� �y�/� ��� Field date: s��� �
':'`'' Recent Weather Invesdgators: / .
Summary (topo, land use, basis) �' r � e:t
f h � �... ,�,;,� ; ;
Has the soil, vegetarion or hydrology been significantly disturbed? /� Q :�rks �? y � ;�,...:,
' �,
Map Unit Name:
T�onomy:
Q�
��
Horizon
Redox Concentrarions* Redox
✓t o
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon , High organics near surface (sandy soils)
Sulfidic Odar Organic pan (in sandy soils)
Reducing Condirions (tests positive) Hydric soils list and profile matches
�� Gleyed Other
� Redox. features w/in 10 inches
Criteria met? �P�J * abundance / size / contrast / color / locadon (matrix or pores)
Recorded data available
No recordefl data available
Depth of Inundation: rtr.`h.L.
Hydrologic source: _���j
Primary indicators -�-
Inundated
Saturated in upper 12 inches
�— Water Marks
Drift Lines
S.ediment Deposits
Criteria met? /��
Aeriai Photographs Sh�eam gauge
Other
Depth to satu�a�}on: �" Depth to free water: j �–y�,,�. _
�econaary nyaroiogy inaicators �c or more�
�� Oxidized root channels (nPPer 12")
Water-stained leaves
Local Soil Suryey Data
FAC-Neutral Test
Drainage patterns
Other:
Wetland? � Funcrional summary:
.
� =-,3�
�.� ,
,� r^r�c_ ,� Dtp„��QD IdK�reIIS Drainage class:
u �� On hydric soils list7
Matrix •
;' �;::
a �- �
Other species: �; � wm lMn�r- v o = �A41' V✓ � T
Percent of species that are OBL, FACW, FAC: /DO
Criteria met? �ap�'
�
WEST LINN LOCAL WETLAND INVENT'ORY
Wedand: �r �7�G��.t �/LC.� Code: �� � � �
Locarion (add/taac lot): Plot #s (or off-site) �Z �
=> Cowardin/HGM class: ; Field date: �� f p 2.
� Recent Weather �,���r rra�... G�r�a 7�' v._� Investigators: � Tl�� 4f.,t.�_ J4/E
Summary (topo, land use, ba�is) f ���.� i��n-;a� ��sr,�'-,-� .us��.�,� S 7`� r.+�<<.�,.� �' u r� � c� ;•^..�..�./ �, ; / ��;t.
" �sr�£=�te� � _'� "
Has the soil, vegetation or hydrology been significantly disturbed? � n �'" �hc�"�r ,- 4 �:{ =""'`.�,-
! r �
Trees % Cover 2S Herbs % Cover
Percent of species that are OBL, FAGW, FAC: � pp �
Criteria met? �/D
Map Unit Name:
Taxonomy:
�'�rat�l,.f�� w �/� � ��ul�s` Drainage class:
�� d On hydric soils list?
Matrix •
Color Redox Concentrations* Redox Denletions
•*.
p _ .0
H � � g
Horizon
� , - __ o .
�—p ,�--- '_'o ._._-
Structure
Hydric Soil Indicators
Histosol Concretions ( Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed . Other
Redox. feahues w/in 10 inches
Griteria met? n!� * abundance / size ! contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: � Depth to saturation: Depth to free water: �'
Hydrologic source: _ ,,,�-{' „(�T .�c _.�--r'd r � r .�'�z` a-1 �� .-r'
Primary indicators — T R � dary Hydrology Indicators (2 or more)
Inundated Oxidized r'oot channels (upper 12")
Saturafed in upper 12 inches Water-stained leaves
Water Marks Locai Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage patterns
Criferia met? �� _ p��;
Wetland? �/�(�l Functionai summary:
Sign�cant?
,_ .
r
��' ����� ; + ( e � G� /ltl''��,f,�ti C �`� �,e": a9 -r ,�.*�' , � c. .
� ''" ,�;� a�`�._ c�t'`��'"
'A� �`C� C v � ��-`^f�� e4
�.� �� e� �.c`�" � ,u � ,� ���.'�. � �� e .':'°� �"� ��� �,
� � . �� �„
Other species:
F � v�
��� �� w .�.�. . -�
�
r O� t�'^�. .� �, i i�' �'� AC ��0 WEST LINN LOCAL WETLAND INVENTORY '; ���
3{ �
Wetland: -�h.� �� Code: Fi�. Q Z ?��,
Location (add/tax lot): � � . • .. _'- �� � Plot #s (or off-site) �,.
Cowardin/HGM class: Field date: - D `x �
' Recent Weather Z Invesrigators:
Summary (to , land use, basis) �' - ,, ri , ' � _ 7 -' ��,�,,,�f
.
Has the soil, vegetation or hydrology been significantly disKurbed? ,� � �
c:riteria mer:
Histosol
Histic Epipedon
- Sulfidic Odar
Reducing Condirions (tests positive)
� Gleyed
— Redox. features w/in 10 inches
Criteria met? � .
Concretions / Nodules (w/in 3"; > 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / conirast / color / location (matrix or pores)
Recorded data available _ Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: � Depth to saturation: ;� �' Depth to free water: �� c� Q,�' dG �
Hydrologic source: � G��,��(
Primary indicators Secondary Hydrology Indicators (2 or more)
Tnundated Oxidized root channels (upper 12")
� Saturated in upper 12 inches ,�--° Water-stained leaves
�/ Water Marks Local Soii Survey Data
Drift Lines FAC-Neuh�al Test
Sediment Deposits � Drainage patterns
Criteria met? �.{�� Other:
-•--r—
Wetland? U� Functional su
Signscant? 1�.GC-:b1 �t'/�F�.a.�o,�:_.. ��F � aw�. i,n -.2rr✓�5�.;�- �,r.� ...A:lr�.. �;rit�-rt=c�
�*
r-`
a
�
P�
ti
�
�
�
,�/yg.-r u.�/ � or� � �a�. -� —� �uh� � �N a,k-, �9�n-� $q,r�" �:� �dUi'�f � . � s�� . �_, � �;" >>'� l•�..
� . "
Map UnitName: �erna�r�m#s t- f/cwi,n.a.,o/% Drainage class: w d,-�.,�icf
Taxonomy: �� r� On hydrlc soils list7 //l�
Matrix • �
�
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �k.�G-��-e--C�t-e2�, Code: �Q. b Z
`.'..� Locarion (add/tax lot): �� 5 ' y� � � / Te ,-j' �.,,,�,�,,� Plot #s (or off-site) �-2
Cowardin/HGM class: * `� Field date: -y —oZ
� _ Recent Weather ���fl ;' ° ,' � In�vestigators: ',r'� .
Summary (topo, lan use, ba�is) �� ���� j�,,��{--
Has the soil, vegetarion or hydrology been significantly disturbed? nkj
Trees % Cover .ui� Herbs % Cover
Map Unit Name: X��a�l,.�.vts F/-�,� J��oia�llr Drainage class:
Taxonomy: t� !� On hydric soils list7
Matrix .
�r
Redox Concentrations* ; ' Redox Depletions
; ,,�v -- _ _
Texture Structure
Hydric Soil Indicators
Histosol Concretions / Nodules .(w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? �_ * abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: ._...---- Depth to saturation: Depth to free water:
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Sa�urated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits . Drainage patterns
Criteria met? _�_ 0��:
Wetland? Funcrional summary:
Significant?
otherspecies: `�o-�,., po�. 6;,,_ ,r�,;�,C.2
—�
Percent of species that are OBL, FACW, FAC:
Criteria met? �j_ �
1�.� �-�',��v���r``� �=�-`Y`
,j_ ��w`� _.
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �l�c. +�i'i�. �F-�u-�-� � Code: � - �J�
Location (add/tax lot): ' �� �,� j�, . Plot #s (or off-site) }� 1
Cowardin/HGM ciass: FO � F� Field date: - 21- o
.� Recent Weather I?.�,,�.�2 E• - 2 dr" :' C, Investigators: ��,Lt
Summary (topo, land use, basis) iaet�u:�d' v� ,.., ��. u.za_.k. _
Has the soil, vegetation or hydrology been significantly disturbed? �� �
species:
perccnt of species that aze OBL, FACW,iFAC: gp � ' �
Criteria met?
Map Unit Name: e/�er�i f'S �C,�p�a�.e r�, �f Drainage class: Gu� ff �/r�.t �r.�
Taxonomy: �� r �� On hydric soils list`? �
Matrix
`� � �`c�s
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
� Hisric Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests posi6ve) Hydric soiis list and profile matches
Gleyed Other
Redox: fea�r�s w/in 10 inches
`Criteria met? �; * abundance ! size / contrast f color ! loeation (matrix or pores)
Recorde8 data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: — Depth to saYuration: _��� Depth to free water: ����`� ( Sw�i�
Hydrologic source: ��dd�
Primary indicators �econdary Hydrology Indicators (2 or more)
Inundated � Oxidized root channels (upper I2")
��- Satnrated in upper 12 inches � Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAGNeutral Test
Sediment Deposits Drainage patterns
Criteria met? Other:
Wetland? ��,y Functional "summary:
Signiticant?
°�;�5 ��
,
� ��x��A 6 �.�... __ _
✓
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �. �i�2, �.�.cG.,� �� , Code: � - O ?j
Location (add/tax lot): ( 5io",.� ��
��� ��1... Plot #s (or off-site) � Z
•:^1 Cowardin/HGM class: Pietd date: - p�,..
'� Recent Weather 2 w�'ss Investi ators: ,
�eu..L;" 3�ic-zt d,r.,, ��+.�-�� 8
. Summary (topo, land use basis) � � - ' .� ' `��!` s
�Fo �tuuQO� �-n �Kef ��( '�._ � +Lm..;. c
Has the soil, vegetation or hydrology been significantly disturbed? N b
Percent of species that are OBL, FACW, FAC: S"Q
Criteris met? �_
Map Unif Name:
Ta�conomy: .
Horizon
Matrix �
Color Redox
Draanage class:
On hydric soils list?
Redox
hv
r
Structure
Hydric SoiI Indicators
Histosol Concretions / Nodules (w/in 3"; > 2 mm)
IIisric Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan, (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed ; Other
Redox. fe�tures w/in 10 inches
Criteria met? NU * abundance / size / contrast / color J location (snatrix or pores)
Recorderl data available Aerial Photogaphs ` Siream gauge
No r�rded data available Other
Depth of Inund�on: Depth to saturation: �.-- Depth to free water. �
Hydrologic souice:
Primary indicators Secondary Hydrolog,y Indicators (2 or more)
Intindated Oxidized root channels (upper 12")
Saturat�upper 12 inches Water-stained leaves
- WaterM Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposi�s Drainage patterns
Criteria met? � O pther;
Wettand? �,I U Eunctional summary:
Significant?
Other species: .
;, �
��_
� � r �: n �- su '�� ._.FT�'�r..�-�f. t,.... � .
� J ,� �_� �� yy WEST LINN LOCAL WETLAND INVENTORY .
Wetland: ���h.c� C�.- D.�. �-�. Code: �(Z- p'�
� Location (add/tax lot): ��,, �.,, �` Plot #s (or off-site) � / �
Cowardin/HGM class: �p � pr� ,! � V' Field date: N„� 3- O Z.
Recent Weather ���.n-��-;�-- I%z_ we�.ic.s Investigators: �,/_tJ
Surnmary (topo, land use, basis) ` -� . �p�., � �f;�,.� .���.,��,
Has the soil, vegetation or hydrology been significantly disturbed? r,Jp
Trees
Sfm11nE I
.� �
status
% Cove
% Cover
% COVCI'
Herbs % Cover /(f'p�
S��spi� � 3tstus % Cover pom.
�WI��S ��e°��..s� - _ Q 20.
�x� a� �.���; a
. �ucs@� �t�4�a:� `�� �
�
�.'� _ ' . .: . ' T . .
Drainage class:
On hydric soils list7
Map Unit Name:
Taxonomy:
Matrix
Depth � Horizon Color
- /.�" / 0�/�2
Redox Concentrafions* Redox
�.
I'IG
Texture Strueiure
- „� �,� � � �. � ,.
u - �2-`� �D ,�, �S l _ �S f� �4ztwt. ��.E�dW /?yD� 26i'��
'�_!S(�� 9 G��IZ / .e,., �... c�....ti..�r., 7F,�nr.F�(1,i il�.. rar,is..
' Hydri�+ Soil IndiCators ' '
Histosol Concretions / Nodules ,(w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor - Organic pan (in sandy soils)
Reducing Conditions (lests positive) Hydric soils list and pmfile matches
Gleyed Other
Redox. features w/in 10 inches
Criterla met? �� * abundance / size ! contrast ! color ! location (matrix or pores)
Reeordeil data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: � Depth to saturarion: c., �iuY Depth to free water: �
Hydrologic source: ��,�y.� y�i �
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
�— Saturated in upper 12 inches —�� Water-stamed leaves
Water Marks Local Soil Survey D.ata
Drift Lines FAGNeutral Test
Sediment Deposits , Drainage pattems
Criteria met? � �I p��;
Wetland?
Significant?
Functional summary:
Pe.rcent of species that are OBL, FACW, FAC: �(� �
, Criteria met? : y � 5
v
�
WEST LINN LOCAL WETLAND INVENTORY
Wetland: ��t�fC�.r' ���k.<.e, /`t . �-vti-� Code: �� - ��t`
Location {addttax lot): ✓ Piot #s (or off-site} �t Z
;.` ,�! CowardiniHGM class: Field date: 0 8�.,.
•. _ Recent Weather Invesrigators: �.,.�,t)
Summary (topo, land use, basis)
Has the soil, vegetation or hydrology been significandy disturbed?
Trees
s ��� r sr��s
nus �t+hrA
: �� m��
�sniine / Shrub
�P.t'i4 CtXa�,�
�..�tS . d.i.Sc.E'�.e,r
}� �er u►fi;{N►aiun.�
Other species:
�io co��
% Cover
Dom S recies / stat % Cover pom
� Pd�S�i�um n,�.u.����� �RGJ �� ✓
,
�
�.. <Lo�?-�,� E
Percent of species that are OBL, FACW, FAC: �j °J
Criteria met? N O
Map Unit Name: f(v� aQ ¢ �
TaxonomY� ,r.rrv,�.�/�: ///��e
Matrix �
Depth Horizon Color Redox
' Drainage class:
� On hydric soils list?
Redox
L�
Structure
" ,;
Hydric Soil Indicators
1
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon . High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and pmfile matches
Gleyed Other
ltedox. features w/in 10 inches
Criteria met? �) C� * abundance / size / contrast / color / location (matrix or pores)
Recorded data availab}e - Aerial Photogaphs Strearn gauge
No.recorde� data available Other
Depth of Inundation: Depth to saturation: Depth to &ee water:
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more) .
Inundated O�dized root channels (upper 12")
Saturated 'm upper 12 inches Water-stained leaves
Water Marks Loca1 Soil Survey Data
Drift Lines FAC-Neutral Test
Sedirnent Deposits Dramage pattetns
Criteria mef? ,t � (� _ Other:
Wetland? /Jl1 Functional summary: �
Significant?
Cover
,, zN��
� �- �� ��.�"�c..�-�
WEST LINN LOCAL WETLAND INVENTORY
Wetland: ��ps Code: �1:� �' �l
Location (add/tax lot): _��'�7,� % Plot #s (or off=site) '� �
Cowardin/HGM ciass: j��j /$'v : Field date: �- pZ - D'L
Recent Weather Investigators: (�.t/, ��
Summary (topo, land use, basis) � ~ ,� , � (Z W ��g�p, � �a y,, y �--
`
Has the soil, vegetarion or hydrology been significanfly disturbed? /�O
/ St3tus
�
Sa ling / Shrub ' I
�k . � at S/A�e�/�r td�us
5 c� �1�t-i ce�'�'S a
�:�:bu�'wt�►+�S =
Other species: �
' '-
%
% Cover
Percent of�pecies that are OBL, FACW, FAC:
Criteria met? ��
Map Unit Name:
Ta�conomy:
� n_�
��
Matrix
Herbs % Cover S
Sneciec / �+afi�� % Cover pom.
_���_a�+yikM C+� 9s�,. w��. �{
- v�o � i
_ _
Drainage class: So»� E:s6,�.� �ouv-/�r �r�,t,s�r�
On hydric soils list? r/ v
Horizon Color Redox Concenh Redox
Histosol
Hisfic Epipedon
Sulfidic Odor
Reducing Gonditions (tests posirive)
Gleyed
�/ Redox. features w/in 10 inches
Criteria met? � t�CGi
U
Hydric Soil Indicators
Concretions / Nodules (w/in 3' ;> 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth" of Inundatiori: -� Depth to saturation: �� Depth to free water: �R '
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
� Saturated in upper 12 inches �— Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits � Drainage patterns
Criteria met? �_ Other:
Wetland? � Lj Funcrional summary:
Significant?
✓
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �� �.,�.�.:.�{�, Code: ���C' f
Locarion (add/tax lot): ��' ��� Z F Plot #s (or off-site) � Z.
''.� Cowardin/HGM class: Field date: �_ Z—� ?_
Recent Weather � �" � _ :,wee _ Investigators: �� � L �
Summary (topo, land use, basis) `
Has the soil, vegetation or hydrology been significantly disturbed?
Trees
Species / status
C�t,t�15 �^'��'�''^� L
� +�a�e�� i �a �
. u
SaplinE / �S�h�rub
�S �i1 to I.o-✓ �
��eria cex�c.ti��S _�
s (!�'n.u.i e,�
- . P�'"✓i�s.� �
% Cover 7� Herbs
% Cover pom Specie
� •
/ status
% COVBI G
% Cover I
i�t►�
% Cover
Percent of species that are OBL, FACW, FAC:
Criteria met? Jy�,n
Map Unit Name: �
Taxonomy:
Depth Horizon
ii
.� "
�+_ � �z' ,
Drainage class:
On hydric soils list?
Redox
Redox
Hydric Soil Indicators
�'LG " '
Texture
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? �O * abundance / size / contrast / color / loca6on (mah or pores) �
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundarion: /� Depth to saturarion: /�/ r_ Depth to free water: ; 7/�`�
Hydrologic source: � ,� - T
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Loca1 Soi1 Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage patterns
Criteria met? N D Other:
Wetland? Functional summary:
Significant?
� ��t'l
� .ot.ci.i:-a- .a , �v..�-�' 'LC�,�t�tC��i.2.�'�.�'
f
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �c� � 0,�.�• si�P_�'�,� „`isfJ >'�° Code: �U - O �
Locarion (add/tax lot): Plot #s (or off-site) .�t- )
Cowardin/HGM class: �+� ��--��.; S� �/�T Field date: - - 02
',_ :;; ,� - Recent Weather ._ Invesrigators: �
- � � Summary (topo, land use, basis)
Has the soil, vegetarion ar hydrology been significantly disturbed?
1 status
.� s - , ar ,
1
, / Shrub
I� $a � �SD �L►�/(�E�
�„b us urs`rwu.�; �
����:
Percent of species that are OBL, F.
Criteria met? ,,��.5
% Cover �'(�
% Cover pom.
°lo Cover ((JS Herbs
o Cover pom. Species / status
�� t/ �I"L�l d.�hJo�Zt C> �5 L
�G �oa Fh�C/F,��,
�;�-� �� 5� �c.-�
� . � , _ .. . . . _ �.l' . .
, FAC:
Aistosol
Histic Epipedan
.,/ Sulfidic Odor
Reducing Conditions (tests positive)
Gleyed
Redox. features w/in 10 inches
Cr'steria met? j,tp�6i
��
Hydric Soil Indicators
Concretions ! Nodules (wfin 3' ;> 2 mm)
High organics near surface (sandy soils)
Organic pan {in sandy soils)
Hydric soils list and profile matches
Other
* abundance ! size / contrast ! color ! location (mahix or pores}
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundarion: Depth to saturation: �j,�� Depth to free water: �' "
Hydrologic source: �",s,2�,,. ��/s/ �•
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
—� Saturated in upper 12 inches Water-stained leaves
/_ Water Mazks Local Soil Survey Data
i/ Drift Lines FAC-Neutral Test
Sediment Deposits Drainage patterns
Criteria met? � Other:
Wetiand? � Functional summary:
Significant? `
Matrix •
Depth Horizon Color Redox Concentrations* Redox Denlerions* Texture
c/— �� .��,:'�
WEST LINN LOCAL WETLAND INVENTORY
5,, ' v .,�-�
V✓Ct�s[ld: /CQi�I.Y( a r
.zcr � � �2.- -�- -� �•- c'�.�' u �� Code: �'O° U �
_ Location (add/tax lot): ` Plot #s (or off-site) �Z,
_;`_;� Cowardin/HGM class: Field date: �/ .�3 — o Z•
•- Recent Weather Investigators: i �,,,}�()
Summary (topo, land use, basis) G� ���,,�,,� ���_ �
- r
Has the soil, vegetation or hydrology been sign�cantly disturbed? �JO
Trees % Cover ��) Herbs � %
I status
u �.a�'r�a►+.a
,o�SkY,� v►�zi � i �
(J
/ Shrub ,
1�_
Utrier sgec►es:
�,
Hydric Soil Indicators
. _
, � a::.�--.. _ . _ _.
Percent of species that are OBL, FACW, FAC:
Criteria met? �p
Map Unit Name: : f _ Drainage class: S , �
Taxonomy: � f-�- � On hydric soils list? h
Matrix
Horizon Color Redo
% Cover pom. S pecies / status % Cover pom.
� 3U ✓ t'�� � t4 ,W�u.�n� /U ✓
_w ✓
% Cover
RedoxDepletions*_ __ Texture Structure
i
�
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Conditions (tests positive)
Gieyed
Redox. features wlin 10 inches
Criteria met? �/'n
Concrerions / Nodules (w/in 3' ;> 2 mm)
High organics near sur#'ace (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aeriat Photographs Stream gauge
No recorde� data available Other
Depth of Inundation: ..-- Depth to saturation: � 3" Depth to free water: — a ----
Hydrologic source: � S pQ�,G .
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated � Oxidized root channels (upper 12")
Satutated in upper 12 inches Water-stained leaves
Water Mazks Local Soil Survey Data
Drift Lines FAC-AIeuh�al Test
Sediment Deposits Drainage pattems
CriEeria met? _ p _ Other:
Wetland? _(j(� Functional summary:
Significant?
�_ � � � �
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �a.(�Lt...mv, L�-�i � /�t.,i,.+.v�(C� . Code:
Location (add/ta�c lot): � �� �„� �./%,�,��, �Q��{ Ptot #s (or of� site)
Cowardin/HGM class: pF.y� ff�,= Field date:
Recent Weather Sw,rw �a� ��r.�;� �€ y �a,e�--a,�t2��.. Invesrigators:
Summary (topo, land use, basis) � _ /y}�f � �f �_��.�.TS Ti
Has the soil, vegetarion or hydrology been significantly disturbed? u� 5—
%�?-01
� /
—7=2- o� iD: 3c� a�
Trees % Cover � Herbs % Cover ,� g
Species / status % Cover pom Svecies ! status % Cover pom.
� �.A�.,a .t-u-1, �- F�C� I �� ��•- � � a n�ctA 3 ✓
�t�1�t(,vs 2�iJ�iuS �GVJ.
�Tu�Ha (�.�C'f� �
/ Shrub
Other species:
% Cover
.LOc_�.a-�' �,.. .-�r-a..� �
Percent of species that aze OBL, FACW, FAC: � 7 -
Criteria met? �,+�
Map Unit Name:
Taxonomy.
D epth Horizon
Drainage class:
On hydric soils list?
Matrix •
Color Redox Concentrations* _ Redox
� _
" '_r/�s
Texture Structure
Hydric Soil Indicators
. Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
_ Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organicpati (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? I,�E. 5 * abundance / size / contrast / color / locadon (matrix or pores)
Recorded data available
No recorded data available
Depth of Inundation: ��i�u.
Hydrologic source:
Primary indicators
✓ Inundated
Saturated in upper 12 inches
Water Marks
✓ Drift Lines
Sediment Deposits
Aeria] Photogaphs Stream gauge
Other
Depth to saturarion: �— Depth to free water: �
Secondary Hydrology Indicators (2 or more)
Oxidize8 root channels (upper 12")
Water-stained leaves
Local Soil Survey Data
FAC Neuh�al Test
Drainage pattems
rn �ot-��.
Critena met? � Other:
� Wetland? U�_( Funcrional summary:
Significant? ����y
,f d�La ����i .
},
WEST LINN LOCAL WETLAND INVENTORY
Wetland: .��✓no�.� �O'��.,�,rF:.rC..�_ • Code: �` � �
Locarion (add/tax lot): �� 5.e� #1. Plot #s (or off-site) a��,
l ;:-_� Cowardin/HGM class: --- Field date: �J- - 2— DZ ; /a' y� a�n
`_ °,�:: s Recent Weather ✓ Investigators: i l� �. c.J
- Surnmary (topo, land use, basis) ✓
Has the soil, vegetation or hydrology been significantly disturbed? �� —+--rr��E,,, �,C(�
Trees °1oCover /p Herbs %Cover ?U
Species / s , I tatus % Cover pom S�ec;P� ! �*an� % Cover pom
�St,u�? Y�t��,ii ��.tJ f � �e� �Ls�,�wa.cera. G - .�� ✓
�) . Ti'-i��,k� s�.Q�- FAc° �� '�
��� luu.�ce lu�a. � E�C- L—,
j, �
Q.fGI�tA.trr� O�eEINGf.� � I�—
c r„ r e�,...... o C (o �.0 f,uI1�.S �du �ryjcj ;'� � T
Pse.u�-�s ,�c�, � �o o��
� zt�ii d ✓ Ci�ovivvK a`�.�'ybus NG /
YI�`�` �t` �.+� , � t"_�� � k 2
o�n� ����:
asst bl /
Percent of species th
Criteria met?
Map Unit Name:
Taxonomy:
Depth Horizon
are OBL, FACW, FAC: '�3 __
�_
Drainage class:
On hydric soils list?
Ma�ix
Color Redox
* Redox
. •� s
Shucture
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Conditions (tests positive)
Gleyed
Redox. features w/in 10 inches
Criteria met? ���
Hydric Soil Indicators
Concretions / Nodules (w/in 3"; > 2 mm)
High organics near surface (sandy soils)
Organic pan (in.sandy soils)
Hydric soils list and prafile matches
Other
� abundance / size / conirast / color / location (matrix or pores)
Recorded data available Aeriai Photogra�hs Stream gavge
No reconde�l data availabie Other
Depth of Inundation: -- Depth to saturation: Depth to free water: - -
Hydrologic source:
Primary indicators Secondary Hydrolog,y Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Locai Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage patterns
CriEeria met? �_ Otha:
Wetland? Functional summary:
Significant?
a-�� �e� Cmr�����
WEST LINN LOC.AL WETLAND INVENTORY
Wetland: D��QN�P.a( � �bbf�wtoYU�'Code: �Tl�—v'Z--
Locarion (add/tax lot): Plot #s ( r of� site) ft-
Cowardin/HGM class: S �' '`� Field date: —0 2— O Z.
Recent Weather w w a Investigators:
Summary (topo, land use, basis) _ j��,W� � �'��,�r - �"j—IU �I.s .4.��.,r m��
Has the soil, vegetation or hydrology been significantly disturbed7 /��
Trees
� S ecies i status
o S�a"M {�'�
�',�-� ('�- u f -
S �al1 X � �u.��,
�
. . - �x ��'s r—�
��us �� �
or������: _ko�U.
Percent of species that are OBL, F.
Criteria met? .� i �
Map Unit Name: ����
, Taxonomy:
Matrix
Horizon Color
Co�er �. fl Herbs % Cover ZO .f—
'over pom Suecies i status % Cover pom.
5 0 ✓ �,t�wS e�i�5 _ _._ �
o n5 Qh�inact.a
�io ca��-
; FAC:
✓
Drainage class:
On hydric soils list? _
, ` , L
Structure
: izsec�. �eaur :�. ��rs�niu�.ir �.1/. Iit'=l)a� uI.1 �.a��T _
)
/ �
Hydric Soil Indicators
Histosol
Hisric Epipedon
Sulfidic Odor
Reducing Conditions (tests positive) �
Gleyed
Redox. features w/in 10 inches
Criteria met? u �j `
Concrerions / Nodules (w/in 3"; > 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soiis)
Hydric soils list and profile matches
Other
* abundance / size / contrast / color / location (matrix or pores)
Recorded data available 1/ Aerial Photogaphs Stream gauge
No recarded data available Other
:� Gr � Depth of Inundation: Depth to saturation: Depth to &ee water:
Hydrologic source: �,�,,�y, c�, y�y�
Prima indicators ' Seeondary Hydrology Tndicators (2 or more)
�'� A '�� Inundated Oxidized root channels (upper 12")
T Saturated in upper 12 inches Water-stained leaves
rb�' Water Marks Local Soil S�rvey Data
Drift Lines FAC-Neutral Test
Sediment Deposits � Drainage pattems
Criteria met? �_ Other:
Wetland? T,5 Functional summary:
Significant?
�a-�
�� �� �
d� .
I
��d �r� '`�!� lo� �f �+� b���em� � w�� T�. �� � b�, vd�ie �� Nt�v ��:.�.��
f��. S .,., . i . _ . _t �.� . ru . _ � .
WEST LINN LOCAL WETLAND INVENTOR
Wetland:
Location {additax lot): _
Cowardin/HGM class: _
Recent Weather
3ummary (topo, land use,
Code:
P.lot #s (or off-site)
Field date:
ti4��cu� �c.ce� ��. 3 - � ,
Y. Gwf vu^l�s �a tr�� beP,m�, �
�'�Gt(,� C'a �-+I � (6�ee.c woa,�t,r�G,
� � cor�.��h
. 2 � ��
Has the soil, vegetation or hyd=ology been significandy disturbed? �(/'p
�`�c'.es
% Cover (,o f7 Herbs
% Cover pom. . Suecies / status
% Cove
% Cover
Sapling [ chrnb % Cover �jp
' k5 Ser�
S ��
bu � V
-��.,"" � {�e �
Qther spa.�es:
Percent of species that are OBL, FACW, FAC:
Criteria met? �_
Map Unit Name:
Taxonomy:
Drainage class:
_ On hydric soils list?
Mahix
Horizon Color
�
�/....
Redox
Texture Structure
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm).
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor . Organic pan (in sandy soils)
� `�'Reducing Conditions (tests positive) Hydric soils list and profile matches
� Gieyed Othe,r
Redox. features w/in 10 inches
Criteria�met? �! * abundance / size / cont�ast / colar / locaUion (matrix or pores)
Recorded da#a availalile Aerial Photographs Stream gauge
No recorded data available Other ��
Depth of Inundation: __ s� Depth to saturation: '�jry Depth to free wafer: �_
_ Hydrologic source: Q1.�.cw, 49Vrt@�o�1�� S .
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
-' Saturated in upper 12 inches � Water-stained leaves
Water Marks Local Soil Survey Data
^�� Drift Lines FAC-Neutral Test
� Sediment Deposits � Drainage patterns
Criteria_met? y � Other:
Wetland? � Functional summary:
Significant? �
_ WEST LINN LOCAL WETLAND INVENTORY
Wedand: I �Gw�wV G f: Code: " l�.�
� Location (add/tax lot): �,�,r Gc, �- Plot #s (or off-site) Z, �
, Cowardin/HGM class: �� b 1S Field date: _5 2 O Z '
- Recent Weafher Investigators:
` 3ummary (topo, land use, is)
Has the soil, vegetation or hydrology been significantly dishubed? �
Trees ' % Cover Q. Herbs % Cover .�j'�j
S ecies / status % Cover pom. S ecies / status % Cover pom.
�� �.s n� v ✓
� .r ✓
. � Dlina / . % COVCI Q
u�►w5 ddSca�o-� �
� �Qw��iuG.�S t�d.�c.�++.850. C�
. ���tS� wV�'i nus i/
Other species: �
Percent of species that aze OBL, FACW, RAC: �
Griferia met? �t/p , ' . �
;. �� Map Unit Name: �' - Drainage class:
TaxonomY� �� i� . ur» iweDZ`� � hydric soils list? t /�
Matrix . •
D th Horizon Color Redox Concenirations* Redox D letions* Textute Siructure
� -' �'�� /0 yQ � e '7 $� i �—Y y GQ'M.�
Hydric Soil Indicators
Histosol ' Concretions /. Nodules. (w/in 3' ;> 2 mm) '.
Histic Epipedon High organics near surface (sandy soils)
, Sulfidic Odor Organic pan (in. sandy soils)
Reducing Conditions (tests posifive) Hydric soils list and profile matches
Gleyed Other ,
Redox. features w/in 10 inches
Criteri$ met? N 0 * abundance / size / wntrasf / colar / location (matrix or pores)
Recorded data available Aerial Photographs Sh�eam gauge
No recorded data available Other
Depth of Inundation: � Depth ta saturation: tn,p-�. Depth to free water: 1�
Hydrologic source: N /� �'u'N �t�6�t. •
Primary indicators � Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Suryey Data.
' Drift Lines FAC-Neutral Test
. Sediment Deposits Drainage patterns
Criteria met? �Q Other:
Wetland? �� Functional swnmary:
Significant?
✓ � ! �C i 0 ` .'c_b.. �`.._ i -Ft,r�^� A _�'' �
�t,Q,�_,;.w,-n ��, WEST LINN LOCAL WETLAND INVENTORY
WeUand: .��3'�d � t�,. (�.�t1n'�? Code: �"' 0, *S.:_ ,
Location (add/tax lot): � Plot #s (or off-site) � �
; :� ' Cowardin/HGM class: �� /1� � Field date: - 3 — "Z..,_
� Recent Weather �—� � Investigators:
Summary (topo, land use, basis) ��� j��; ..�
Has the soil, vegetation or hydrology been significantly disturbed? �Q _ �
Percent of species that ace OBL, FACW, FAC: ,�j,3 p
Criteria met? Id�� . �
Map Unit Name:
Taxonomy:
Drainage class: �.,
On hydric soils list? D
Horizon Color Redos Concentrations* Redox Depletions* Texture Structure
Hydric Soil Indicators
Histosol Concretions / Nodules (w/iii 3"; > 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? � * abundance / size / contrast / color / location (matrix or poies)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other ���
Depth of Inundation: .�r�- Depth to saturation: o µ v Depth to free water: �1 � 6tq E',��
Hydmlogic source: •
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
� Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits . Drainage pattems
Criteria met? �� Other:
Wetland? � Functional summary:
Significant?
Otlier species: �
v . - "se.u-4t;. "z'�i.C�J1�=�, G-6'TY--�u�P.',.@.-O� � . . . .
i
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �� ��( i.�: �� �u�tQ�_.a��o+�. Code; ��' Q.�'�
Locatiom (add/tax lot): Plot #s (or off-site) #- y
Cowardin/HGM class: r Field date: --2 _ '�--
_� RecenrWeather Investigators: �-(�
Surnmary (topo, land use, basis) � �$ ��� _ �
,
Has the soil, vegetation or hydrology been significantly disturbed? h!p
Trees
Species /
�(-�GY►AAS
status
ru
% Cover ��(J Herbs
°/a Cover pom. S ecies / status
� �
�� P��u� �
Horizon Color Redox
Cover pom.
Hydric Soil Indicators
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Conditions (tests positive)
Gleyed
Redox. features w/in 10 inches
Criteria met? �_
Concretions / Nodules (w/in 3' ;> 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Odier
* abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: .--� Depth to saturation: T--� Depth to free water: ^
Hydrologic source: .
Primary indicators Secondary Hydrology Indicators (2 or more)
inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Loca1 Soil Survey Daca
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage patteins
Criteria met? �j�_ Other:
Wetland? 0 Functionalsummary:
Significant?
Percent of species that are OBL, FACW, FAC:
Criteria met? J�JD
� � � -=�.�.� �,��1 � _`'� �f-�s-�M
WEST LINN LOCAL WETLAND INVENTORY
Wetland: .�,os�r'T i/�lU�t1 Cv'K,� Code:
Locarion (adcUtax lot): ` Plot #s (or off-site)
Cowardin/HGM class: �S'S �T Field date:
' -'� : Recent Weather d'�1l;vL — �; �F��� Investigators:
Summary (topo, land use, basis) /�,,,,� ,, a �`'��„� ��,,� ;� o
.���� � �o ��� ��G��-�
Has the soir, vegetati n or hy ology been si ificant y disturbed? l�/27
Trees % Cover
Drainage class:
On hydric soils list?
S ecies / status % Cover pom S ecies / st tus % Cover pom.
� � 8 C�%1� �.�P.ti �A► �1���
� . �w1�1ik."�`""� �%�`G
' �P,u, aw�n S , , " �j
��.���;�Uir, �f +'xA�� ' L�'C-1i�1 t S
. �$ aw�� ��v nne,±n. l
S�apliag `Shru6_ - , �,_ _ �� _ % Cover �, r �E.ti,�c � /A
. ,.:
��.
��`
�_�
Other species: —��' C�6�Gr'D�i � � r C+rC.�
Percent of species that are OBL, FACW, FAC: D
Criteria met? ��j
Map LJnit Name:
Taxonomy:
_ �,�
Color Redox Concentrarions*
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Conditions (tests posidve)
�� Gleyed
Redox. feat►u� w/in 10 inches
Criteria met? ����
a,�' i
. 'I .. ' - - ,���` . .
r'
r;
/� ' .. y
—D 2
Structure
Hydric Soil Indicators
Concretions / Nodules (w/in 3' ;> 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / contrast ! color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: �tt" Depth to saturation: � Depth to &ee water: �
Hydrologic source: .
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
�� Saturated in upper 12 inches � Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAG-Neutral Test
Sediment Deposifs Drainage pattetns
Criteria met? �_ pther.
lil b �
Wetland? if'FFj Funcrional surnmary:
Significant? � y�
�C',t�`��1: �� GoY"- f-�.. _�``
WEST LINN LOCAL WETLAND INVENTORY ,
�_. _
Wetland: �i /UM �i^�� Code: —� �
�,�,- �` �/ � ��;. . y
Location (add/tax lot): Plot #s (or off-site) �- � 2
CowardinlHGM class: -- Field date: � f$ D�..f
Recent Weather lf�.� t� f�@.v'" � �� Invesrigators: 77.� fi�
Summary (topo, land use, oasisj -7���� �r�,�„�,,
f .
Has the soil, vegetstion or hydrology been significantly disturbed? �d
Trees % Cover Herbs % Cover
Species / status % Cover pom. Spec�es / status % Cover pom.
%
S 5�pec �-t�l�s � G
�bu5 �ft,�.n�o;i e
�,�u►�a ��"ca}� .�/
r `, ,
L ,
Other species: _; �A.�.0 S 3�LtM S�R� -
Percent of species that are OBL, FACW, FAC: � y�j �
Criteria met? NO
Map Unit Name:
�,\ Taxonomy:
l
Depth Horizon
�1_i_n
Drainage class:
On hydric soils list?
Matrix
Color Redox Concentrations* Redox
/�
Texture
Hydric Soil Indicators
Histosol Concre6ons / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon � High organics near surface (sandy sofls)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Condirions (tests poSitive) Hyilric soils list and profile matches
Gleyed pther
� Redox, features w/in 10 inches �'�`'�i �
Criteria met? y�s �y� �'�,�(1 * abundance / size / contrast / color / location (matrix or pores)
Reeorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundarion: �! � Depth to saturation: ��" � Depth to free water: 'l$ ��-�-
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift I-ines FAC-Neutral Test
Sediment Deposits Draiiiage pattems
Criteria met? � p��:
Wetland? Q Functional summary:
Significant?
/�.� �.�.� e���
WEST LINN LOCAL WETLAND INVENTORY
Wettand: ;� l,U,-f� f�z1=�:�.L en�Code: T[.�--��
Locarion (add/tax lot): ��'�' ,',��. Plot #s (or off-site) O/
- Cowardin/HGM class: �, �� Field date: � p� 7
':�; �: Recent Weather ,. .� Investigators: °°-.� ;;: �,,� IC�Tl1' L �J
Summary (topo, land use, basis) �457* /�ax�a� f'f r ru �• e, �'-�
Has the soil, vegetation or hydrology been significantly disturbed? /�O
�\
�.
�
, `�;
�
6
�
�
�'�
. �
c-�
� :
,.��
�
�:
�%`
�
C
.
- �
, <
�� �,
�
�
�
Other species:
Percent of species that are OBL, FACW, FAC: . /p�
Criteria met? c� o. o
Map Unit Name: .Si j(l /
TSXOIIOmy: (�UMGILIG / fG nLCsX��
Matrix •
Depth Horizon Color Redox C;oncentrations*
o-s�� ioYes/z
� / l " �o �,e � �o �e �I� ��. ��
Drainage class:
,�t hydric soiLs list?
Redox
�
Teatture Structuie
,i- -'--
`�
� � � Hydric Soil Indicators
Histosol � Concretions / Nodules (w/in 3' ;> 2 mm)
� Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
v • Reducing Conditions (tests positive) > Hydric soils list and profile matches
Gleyed Other •
,�'� �r Redox. features w/in 10 inches
�' Criteria met? * abundance / size / conh�st/, color /�ocatio (matrix or pores)
� -' .r, ,���:- f Lr�
�- Recorde� data available � Aerial Photographs Stream gauge
� _ No recorded data available Other r �
�� Depth of Inundation: Depth to saturation: ,t4d,t��d1L Depth to free water. �yu:���`�J
�� �-� Hydrologic source: Stor �a� r,vc �v �} �? �p�? �i :� fi Ti�%l2 �i v a+�C .- ��cs��c1 —7—
� �' Primary indicators � Secondary Hydrology ndicators (2 or more) �
� � Inundated Oxidized root channels (upper 12")
?� � Saturated 'm upper 12 inches Water-stained leaves
� Water Marks Local Soil Survey Data
�� t i: Dri$ Lines FAC-Neutral Test
`� � Sediment Deposits Drainage patterns
.�� Criteria met? Other:
''� �°� Wetland? Funcrional summary:
�' Signif'icant?�
J
� + f s a,.t� � � r i
�t a� �" r � d� , � tn.-::_� ,�.��.,: ,.� f .._> <.�/,�.3�.��- ( �; u � -� �,. ��':�c.�, � �`�n�� �'��,� _
, . �.
n1Gu-�i. � _ , � , �, i j`� t - � ` �
�f ;GDI_'K . C���P�- �G'?1�= li�l.. ..., ..�6<S' fif!^,� (V �'x,� .. ,.. 1
�
T—�
! � I� ��.E.� C.�����
WEST LINN LOCAL WETLAND INVENTORY
P p ,.�,G�
Wetland: � �.�,�� �;,.c �c�,t.�; f Code:
Location (add/tax iot): _� Plot #s (or off-site)
� Cowardin/HGM class: Field date:
_ Recent Weather Investigators:
Summary (topo, land use, basis) �/��/, �.�`,��c.�„ f"v l j.cci..�Ri
�L — �
QZ — fG�.?✓, u'� "4,.��.i�
3 z0�D2 � 'r �.
_ ` _
-- ��
Has the soil, vegetation or hydrolo� been significantly disturbed? / i(i �'
c�
�---
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Condirions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? �� * abimdance / size / conh-ast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge .
No recorded data available Other rn6/ S f
Depth of Inundation: Deptti to saturation: Depth to free water: �'O �
Hydrologic sowce:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data _
Drift Lines FAC-Neutral Test
Sediment Deposits Draiaage pattems
Criteria met? n o Other:
Wetland? ) Functional summary:
Sign�cant?
Percent of species that are OBL, FACW, FAC: / Q d
Criteria met? !��
Matrix •
Depth Horizon Color Redox Concentrations* Redox Deoletions' T�ture Structure
� ��
.
� � �''�'. �=� .
WEST LINN LOCAL WETLAND INVENTORY
Wetiand: � j y�� ���,y� �(1�}�Si,. Code:
Location (addltax Iot): ' Plot #s (or off-site)
Cowardin/HGM class: p ��j Field date:
' . Recent Weather L� � <��.: >� r�' =-�_ /f�.2..f �`a _�Investigators:
Summary (topo, land use, basis) 1' _�,i"�.�.t_� �Ct..r_�� f� r. -� ��� �•. �f.�.tE��i.i,�- � l c.t
Has the soil, vegetation or hydrology been significan y dis ? �/�� q���� �.j� �����;L�
�f�!'?::� .���-C�� F �.%F'�:i �' �_
Trees
status
Saplin¢ / Shrub
_ � d�,� _ '
'r u � �r � _
Mah�'uc
% Cover � �p Herbs
% Cover pom. Species / status
O
,,:,:�-� r.�..�.�
% Cover "�
Other species: �
Percent of species that are OBL, FACW, FAC: � p p
Criteria met? i, e f
Map Unit Name:
Ta�conomy:
2 �m � �
Drainage class:
On hydric soils list?
%
. �..rr�L��� t�
�' —
Texture Structure
Horizon Color Redox Concentrations'" Redox
�/ / � -.
Histosol
Histic Epipedon -
Sulfidic Odor
� Reducing Conditions (tests posirive).
Gleyed
� Redox. features w/in 10 inches
Criteria met? ��(,l/>
Hydric Soil Indicators
' Con�retions / Nodules (w/in 3' ;> 2 mm)
Higti organics near surf'ace (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and pmfile matches
Other
* abundance / size 1 contrast / color / location (matrix or pores)
Recorded data available Aeriai Photographs � Stream gauge
No recorded data available Other
Depth of Inundation: i')Uyt.�„ Depth to saturation: �7 " Depth to �ree water: y� �: t�
Hydrologic source: � ° `O - �"�
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated � O�cidized root channels (upper 12") Z "
Saturated in upper 12 inches \� Water-stained leaves
�— Water Marks Local Soil Survey Data
�— Drift Lines FAC-Neutrat Test
Sediment Deposits �� Drainage patterns
Criteria met? Other:
Wetland? � F�unctional summary:
Signiticant? _
�� i,_
:�`},
��
.�-
�.T�..� �f
�,� , �, , ._< .
� �'�'��
� �ocF
, �
b�oc�
� (�,a;�Ce�.. .�� t` ��;��.�-��
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �� u.,, �s•_�a �,,s.�: Code: j �„Q - 0�._
Location (add/tax lot): ,��,�,,, W ��,�_, ¢ r g,,�. � Plot #s (or off-site) Z, �
- Cowardin/HGM ciass: '' Field date: �_,�p_-G 2
���: `'�:� Recent Weatber �a�n �o-t we�-�.: •�,t�,n+�'�a `s'-a--t Investigators: - T"/�� J u� r � K
" Summary (topo, land use, basis)
Has the soil, vegetation or hydrology been significantly disturbed? ��< —��� ��
Species / siatus % Cover pom.
_� �ir i ��G- !a ✓
Qther species:
Percent of species that are OBL, FACW, FAC: � 7
Criteria met? ,,,v �
Map Unit Name: (/' p Drainage class: ��y p�p-y`�� `�,f�+
Taxonomy: L'u�u � G ap/eaccru! On hydric soils list? �/j � ^�
Matrix • �
D th Horizon Color Redox ConcenhaYions" Redox D letions* Texture Structure
o-/� io YR � Z �"° — G�ru�.�.��
Hydrie Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Condirions (tests positive) Hydric soils list and profile matches
Gleyed Other ,
Redox. features w/in 10 inches
Criteria met? � * abundance / size / contrast / color / location (matrix or pores) .
Recorded data available Aerial Photographs Streani gange
No recorded data available . Other
Depth of Inundation: Depth to saturation: Depth to free water: �—
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches . Water-stained leaves
WaterMarks Local Soil Survey Data
Drift Lines FAC Neutral Test
Sediment Deposits Drainage patterns
Criteria met? ab Other:
Wefland? � Functional summary; "
Significant?
i
/ i��1��' S�:1
V �.. � G���Q� (Q��iP-ikQ.t?
��
�
Wetland: �u�c� �.�
Locarion (add/tax lot): �
Cowardin/HGM class: ��—,
Recent Weather 2 ��, Q (
Summary (topo, land use, basis)
WEST LINN LOCAL WETLAND INVENTORY
Code: y 1�.." (»
Plot #s (or off-site} ��
Field date: n- z.� _ D 2
Investigators: —� L�
Has the soil, vegetaYion or hydrology been significantly disturbed? Y�o
� �.
p� I `:; i +
\\` :'
�'.:�.:-'`•� • !
.> �,
.�_c •; `,
r• _
`
.�' Z- --
/Sa.n .0 atin"�'�" c�` c�•2 Q' .�' ' ,
Hydric SQiI Indic tors
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Condirions (tessts positive) Hydric soils }ist and profile matches
Gleyefl Other
r/ Redox. features w/in 10 inches
Criteria met? �(, C� 5_ * abundance / size / contrast / color / location (matrix or pores)
Recorde� data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: �.� Depth to saturation: o��,a�.c,.�a,� Depth to free water: �_�
Hydrologic source: ,�� � �
Primary indicators �� Secondary Hydrology Indicators (2 or more)
Tnundated O�cidized root channels (upper 12")
_� Saturated in upper 12 inches ,�-� Water-stainad leaves
Water Marks Local Soil3urvey Data
Drif� Lines FAC-Neutrai Test
Sediment Deposits Drainage pattems
Criteria met? Other:
Wetland? � Functional summary:
Significant?
�
Other species: d �Jt,�,�,a
Percent of species that are OBL, FACW, FAC: 1Dd
Criteria met? �_
Map Unit Name: c GLaR� � i/fy G/Q a /oA.�.r Drainage class: '�uY� u d/6�.(.YP.f�CI
--�►—� _: .. �
Taxonomy: Juvaatuercfee� � an �a�uc�l.l� hydric soils list?
Matriac •
✓ %- � • , ��'��'�:
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �i,�rt.��• ����q .;E��-�
Location (add/tax lot): � -- • ✓ Plot #s (or off-site)
, - CowardinlHGM class: ?: Field date:
. `�) Recent Weather Investigators:
� 3nmmarY (topo, land use, basis) ���P . ���.�'` � � --' �-��
i� l
� i n ' i.J �t .T�
Has the soil, vegetarion or hydrology been sig�nificantly disturbed7 Ylp ,
Trees % Cover
PereeAt of species that ar.e OBL, FACW, FAC: � u
Criteria met? : u{° 5 ' ' -
. �. .
. . Hydric Soil Indicators . .
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reflucing Conditions (tests positive) Hydric soIIs list and profile matches
� Gleyed � , Other
Redox. features wTin 10 inches
Criteris meY: ^f (} * abundance / size / contrast / color / location (matrix or pares) " .
' Recorded data aysilable . Aerial Photogaphs � Stream gauge
No recorded data available Other
Depth of Inundation: Depth to sahuaiion: � Depth to free water: .— .
Hydrolo�c source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated 'm upper 12 inches � Water-stained leaves
WaterMarks Local Soil Survey Data
Drift Lines FAC Neutral Test ' �
Sediment Deposits Drainage patterns
Griteria met? � Other:
Wetland? �,JO Functional summary:
Significaat?
Other.species: � �
Depth Aorizon Color Redox Concenhations* Re3ox Dealetions" Tcxture Structure
r t: ���
✓_ � �t 5.��:- C�.�;�. �_�:
Drainage class:
On hydric soils list?
� Wetland: ��r ,� ���lyrQl, �� " �G�Y�eu. � Code: �. .� l : .
Loeation (add/t�lot): Plot #s (or off-siYe; +� � '` ` � �
Cowardin/HGM class: , — � �
��,� r� / "' T` Field date: s/. .2 3
�'' '� Recent Weather Investigators: i �, �.I,t�
.. ��
_ z
Summary (topo, land use, basis) �� ��.'�-,,-�_,:.... �,,..�...�,
Has the soil, vegetation or hydrology been significantly disturbed?
°/a
�cies J status % Cover pom. Sp ecies / status % Cover pom.
�Yt�u.3 tu�it t✓' To � Mu;, � �� � � � _ F�G �s' ✓
�St�w► BN�G�"2i4 FAC_Inl 2b ✓
'� � � v
, �
WEST LINN LOCAL WETLAND INVENTORY ,
� nling / Shrub % Cover
� �.I�s s ���� I�s A�+ � ✓
������ �
. �t±;�, .�s rL� : – rr -
, , —
��.� 1
Other species: K,�, ��y,l,���V�; p�� ��td I I
Q --
Percent. of species that are OBL, FACW, FAC: �p�
Griteria met? �.S
Map Unit Name: �(� r �
Taxonomy: � �
Matrix
Depth Horizon Color
�>- Z
� _ � s7 ��,6 �. �
Redox Concentrations*
s
Histoso]
Histic Epipedon
Sulfidic Odor •
Reducing Conditions (tests positive)
�/ Gleyed
Redox. features wlin 10 inches
Criteria met? �a� S
�r
�
�
. �
L:
Texture Structure
Concretions ! Nodules (wJin 3' ;> 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: -- Depth to saturation: �_ Deptl� to free water: "J g
Hydrologic source: ,��.,,n; .
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
� Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits , Drainage pattems
Criteria met? ,� c Other:
Wetland? „� -� S Functional summary:
Significant?�` � _
Hydric Soil Indicators
1/ = U-G�--t .a-o��%C C-�'rc�c�-r_cc,��-f�
�,
���, �� WEST LINN LOCAL WETLAND INVENTORY
'` �
Wetland: ��'' J � �v,.t..�.c �,�.-- �,,c �a.�-� • Code: �-��
Location (add/tax lot): —� Plot #s (or off=site) � � ,.� Z
Cowardin/HGM class: �-- Field date: 1¢ -��- c'�..--
; � Recent Weather Investigators: --�, y.t,�
_ Summary (topa;=tattd use, basis) �—�
Has the soil, vegetation or hydrology been significantly disturbed? . p��
Trees
S ecies / sta
. ��_
Saplin� / Shrub.,
y -- : __ �,eXbu-is l�u�
� �iµ '�'S`O-�
w��a �
_ ► _
o�►� Sp«:,a: u�
% Cover
% Cover
Herbs °/a Cover "j(p
S ec'es / stah�c % Cover pom.
�1�'►'v!� ��val'u►^��I� L `35'� t�
,_ i
��n t� � . � p � nn��i�u�n F�GJ .3�
_A'��� um '!� t� �C �eHwi n.a � D
�trn Ck cdle���►. � ��'"� ''
fll nu5 t-u�_ ft►'� `�
Percent of species that are OBL, FACW, FAC:
Criteria met? ND
Map Unit Name: x P roc,�i�troi�� �/�,�a/er e.a��s Drainage class: P,vC/1 /,�✓'/.�.Gdtl_�,
Taxonomy: « '� On hydric soils list? �'J /�
T�rfiirr
Cinicfiire
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odar Organic pan (in sandy soils)
Reducing Conditions (tests posi6ve) Hydric soils list and profile matches
Gleyed Oflier
Rerlox. features w/in 10 inches
Criterla met? r,f � * abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data availabie Other
Depth of Inundation: �- Depth to saturation: --- Depth to free water:
Hydrologic source: �... .
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposit Drainage patterns
Criteria met? � p��:
WeUand? Punctional summary:
Significant?
Matrix •
�.�. ��;.,, ��=�. � ��-� ���r 7 �� ��-�-+�.�.f,.� �..� -�- ..
W �- �-�- r � r�.ra.-��
WEST LINN LOCAL WETLAND INVENTORY
Wetland: l n./i,Q��ru ^ (fe�R„r�, Code: W S' D)
Location (add/tax lot): Plot #s (or off-site) ,�. /
Cowardin/HGM class: �� � Field date: .¢_a�.-,oZ
,._ Recent Weather � I YL w�Co , Invesrigators: ^ Tf3 i L c,�
Summary (topo, land use, basis)
Has the soil, vegetation or hydrology been significantly disturbed? �!�
Other species:
Percent of species that are OBL, FACW, FAC: � DU %
Criteria met?
Map Unit Name: Drainage class:
Taxonomy: ��uvac�a,cP�s�:r. �/a.o/�a�rs���s Onhydricsoilslist?
Matrix . �
Denth Horizon Color Retlox Concentrations* Redox Deoletion:
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Conditions (tests posirive)
Gleyed
� Redox. features w/in 10 inches
Hydrie Soil Indicators
�.� 1� _ i .a ._�._.
,:
Texture Structure
Concrerions 7 Nodules (w/in 3' ;> 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
Griteria met? ,e s * abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: Depth to saturation: ��' Depth to free water: �
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated ,/ Oxidized root channels (upper 12")
,/ Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAGNeutral Test
Sediznent Deposits Drainage patterns
Criteria met? � Other;
Wetland? Functional summary:
Significant?�
� �J - G�'rn-'�.�" L� —��� �� �'�//�G-eP�U� �I�.� :Y�G s � ?
� `. � . .
WEST LINN LOCAL WETLAND INVENTORY ���� ���
, Wetland: {x)�.�.a����P f`�zt�._ Code: (�lf� �� 1
Locarion (add/tax lot): Plot #s (or off=site) � Z
;�`� ;� Cowardin/HGM class: ...— Field date: .�'_ 0 3_ p 2—
- Recent Weather ��, Investigators: �� Li�
Summary (topo, land use, basis)
Has the soil, vegetation or hydrology been significantly disturbed?
Trees ____ _ %Cover � Herbs
�
�
��
/ status
/ Shruh
s���s��.
% Cover
% Cover
o�,� ����: .
status
% Cover y�
% Cover pom.
�• 3��
�lP,uw�s _ � G ��i�
Percent of species that are OBL, FACW, FAC:
Criteria met? �_
Map Unit Name:
Taxonomy:
Drainage classc
On hydric soils list7
Matrix
Color Redox Concentrations* Redox
' 4
Texture Structure
._,_�
Hydric Soil Indicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon . High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? � * abundance / size / contrast / color / loca6on (matrix or pores)
Recorded data available Aerial P'hotographs Stream gauge
No recorded data available Other
Depfh of lnundation: -- Depth to satutation: �/k Depth to free water: N//.�
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAGNeutral Test
Sediment Deposits Drainage patterns
Criteria met? Nn Other:
WeUand? j� Functional summary:
Significant?
✓ � � , �-0�-+'r'�.�.tIL�[.e
WEST LINN LOCAL WETLAND INVENTORY
f�
Wetland: �v� �Gi.-� Code: ��—Q.'2,
Location {addltax lot): � Plot #s (or off-site) �r
.---� Cowardin/HGM class: pC1M , FO �D r-r S V Field date: t� ��
`� :�� � Recent Weather —�—�
Sr�r w�:u� Investigators: TR _ L GJ. �
Su m m a ry (topo, lan d use, basis) __ _ T— '��
Has the soil, vegetation or hydrology been significantly disturbed? �O � -
BS � St3i.11S
��S Q
%
Cover
% COVet
% �OYCi
✓
Sapling / Shrub
% Cover
L 7 �i ✓
�1}1Cf SpCCiCS: �
wN Kr
Percent of speci� thax are OBL, FACW, FAC: 3 cr ��,,��,,,� �„� ��
Criteria met? �D�S �
Map Unit,Name: G'(
Taxonomy: �
Depth Horizon
�,_ i tl
�i
� i
Texture Structure
Histosol
Histic Epipedon
,,�- Sulfidic Odor
Reducing Conditions (tests positive)
Gleyed
,i Redox. features w/in 10 inches
Criteria met? , Ip �
Hydric Soil Indicators
Concre6ons / Nodules (w/in 3' ;> 2 mm)
• High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photogaphs Stream gauge
No recorded data available Other
Depth of Inundation: ,�� �,,,,. �a� Depth to saturation: S u ,�-. l,it,� Depth to free water:
xyaroio�;� �o,�• am� �.��.v� ,�, p, oa e�` �
Primary indicators � ' �� Seeo dary Hydrology Indicators (2 or more)
,/ Inundated ✓ O�cidized root channels (upper 12")
� Saturated in upper 12 inches Water-stained leaves
_ Water Marks Local Soil Survey Data
Drift L'mes ' ' FAGNeutral Test
S�iment Deposits Drainage patterns
Criteria met? �.p Other:
Wetland? G� Functional summary:
Significant? /`
Drainage class:
On hydric soils list?
Mahix � "
Color Redox Concentrations* Redox
i �j S -
_ ,,
�-a-ri-e-- , � , � , ``;
�° � , ' �,.,�� ,
WEST LINN LOCAL WETLAND INVENTORY `�� '`�`,�
�-_�-:�, �
�_��� � ����:
Wetland: ���. �'� Code: � W I- D 2 .,.'���.��-, '-'���;-.� �.•,�
Location (add/tax lot): ' ' S , ,� � � Plot #s (or off-site) }� 2 � �P���' ` ' '�
CowardinlHGM class: :i:.. > Field date: .5l- ;�_ D Z.
Recent Weather ,� „�,„�,.,_.� Investigators: T _ �cJ� AK.ea.�-n.vt�
Summary (topo, land use, basis) `
Has the soil, vegetation or hydrology been significantly disturbed? /�/'D
C_�•i�17
Trees
Matrix •
Color Redox
Drainage class:
On hydric soils list?
Map Unit Name: �,
Taxonomy: �
D th Horizon
- c. p z
�l - i2 /��,e
»_.� i�:�o :
Texture Structure
-�
�
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Conditions (tests positive)
Gleyed
�_ Redox. features w/in 10 inchcs
Criteria met? , / � �
Hydric Soil Indicators
Concretions / Nodules (w/in 3' ;> Z mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / contrast / color / location (matrix or pores)
Reconded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: Depth to saturation: Depth to free water:
Hydrologic source:
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated (,T Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage pattems
Criteris met? �� pther
Wetland? ��� Funcrional summary:
Signiticant?
��rcnr:?�' '��/l'�G�''�,��c� �..a./�i,�°.. �; i:.t?�'_�''�
�r
Percent of species that are OBL, FACW, FAC: �_�_
Criteria met? n p
� �>. �. ���¢..� - 1���„19 •d-�� .. t�rwl�'n'� �. �.F�---_� j � �� - � �"-
�.� - ��-�� �, �. �
.j :
1 ��� �
�
WEST LINN LOCAL WETLAND INVENTORY (�. . �� �'`,
� �
�; � l ���r, � � ' �.
Wetland: � � ��.� > Code: �� "�� f .._
Locarion (add/tax lot): 1-� Plot #s (or off-site)
Cowazdin/HGM class: S� �T Field date:
Recent Weather : �„��,�f � �;,. Invesrigators:
Surrunary (topo, land use, basis)
Has the soil, vegetation or hydrology been significantly disturbed? �D
�
Map Unit Name:
Taxonomy:
Drainage class:
�On hydric soils list?
Matrix •
Horizon Color Redox
Redox
' ' , S .
f
Texture . Structure
� _... . r r .
Hydric Soil.Indicators
, Histosol
Histic Epipedon
Sulfidic Odor
� Reducing Conditions (tests positive)
� Gleyed
Redox. features w/in 10 inches
Criteria met? ue-5
Concrerions / Nodules (w/in 3",; > 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / coptcast / color / location (mah-ix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: Depth to. saturation: � Depth to fi�ee water: ,/�` 4 '�
Hydrologic source: ��������{,��
Primary indicators � Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
�_ Saturated in upper 12 inches Water-stained leaves
Water Marks . Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits Drainage pattems
Criteria met? � Other:
Wetland? �,(F',,.� Functional summary:
Significant?
�
'—�
�_
m
Percent of species thatare bBL, FACW, FAG: '�
Criteria met? » e.5
� �t
WEST LINN LOCAL WETLAND INVENI'ORY ���
Wetlaad: . : i � p� .��� - Code: �:J�--�3
Location (add/tax lot): � �'�—� Plot #s (or off-site) (j�„ '–'��_
Cowardin/HGM class: � � Field date: �"'
Recent Weath� ' . Investigators:
Summaiy (topo, land use, basis)
Has the soii, vegetation or hydrology been significantly disturbed? �f U
�
i
��..� ,
Hydric Soil Indicators
Histosol Coacretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soiis)
Sulfidic Odor Organic pan (in sandy soils)
Reduciag Conditions (tests positive) Hydric so�7s list aad profile iaatches
; Gleyed Other
Redox. features w/in 10 inches .
Crlteria met? W� , * abundance / size / contrast ! color / location (matrix or pores) '
• Recoidal data available Aerial Photographs - Stream gauge
No recorded data available Other ' ,
� Depth of Inundat�on: . Depth to saturation: Depth to free water.
Hydro3ogic sor�rce: . .
- Primary iadlcators Secondary Hydrology.Indicators (2 or morej �
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks . Local Soil Survey Data
Drift Lines FAC Neuiral Test ,
Sediment Deposits . Drainage patterns
Crite�'ia met7 �O Other: •
Wetland? Func6onal siuimiary:
Signit3caat? -
� :,t`,
k
t�t��. �f p'��
.�
D�iCt BpCCICB:
Pereent of speeies thst sie OBL, FACW, FAC: n ' �
Criteria met2 ' !Jp •
Map Unit Name: �` ; ' Drainage class: /°OGn'[� dr2u�'!�'d
Taxonomy: . �� �� o� On hydric soils list? �/ �
Matriac , •
.. � � � .. . . � � � ^ . . . . . . . tdFdF- , - . . . .
�.. ` � WEST LINN LOCAL WETLAND IlWENTORY ,
_ ,Q av,�n �_ � _ -
wett�t: � � ��e,�'/ur,r�� � B..r,�rt 75-�;� �;oa�: -:� ��� ��??�, _"` . �
. Location .(add/tax lot): ' ' Plot #s (or off-site) 4 3 ___
, Coward'm/HGM class: �� : Field date: . �/-.0 = O Z
Reccnt Weather -]�'( �) Investigators: �� 1�,�[, .
. SummarY �toPo, land use; basis) . . . �
� . �
Has the soil, veg�ation or hydrology been significanfly disturbed? �
,.,
Trees
�i T1tk v�Y► aq . . .
:�o�i►,�,,5 �R.R.��ie
Herbs
status
�
Cover
�
•.� .
Sppling / Shrnb % Cover p .
��►us � �1� ; ✓
1�i1.b�K 5��i�''�,►t� S • c + � �
w �pp S �.� � FA�cU
<���'es'I � ' � � . �
Percmt of species tiiat ere OBL, FACW, FAC: � ��/j �•
CrIterla met? t��5 : �
� Ivtap Unit.Name: Drainage class• . —
Taxonomy: • On hydric soils'list7 _
. Hydric Soil Indicators . .
Histosol. '. Concretions / Nodules (w%in 3' ;>. 2 mm) .
Histic Epipedon • High organics near surface (sandy soils)
SuIfidic Odor Organic pan (in sandy soils)
� Reducing Conditions (tests positive) Hydric soils list and profile matches
\i Gleyal . OtHer •
`1. Redoz. features w/in 10 inches ---
`Crtterla mei? N P��- * ab�danc� / siu 1 con�ast / calor / location (matri�c ar pores) ._
Rxorded data available Aaial Photographs Shroam gaugc
No r«;orded data availabl� Other ��
Depth of Inundation: Depth to saturation: �^ Dept�► to fi�ee water: 9
Hydrologic. source: �
Primary lndicators Secoudary Hydrology Indicators (2 or morej ..
III1IIIdAtOd !��_ OR1d1Zf� lOOt C118llIICiS �IIPP� 1Z"�
�— Satutated in upper 12 inches \,� Water-stamed leaves
�_ Wa.te� Marks Local. Soil Survey Data
�, Drift Lines FAC-Nevtral T�t
�y Sgdiment Deposits . Drainage pattems
Criteria met? ,,�;� Othcr: : __�
?Gt�//Vl.
" �
r 1
.. ..'
_/
W etland? . � Funcrionai summary: P �
. Significant? • . . ''�
�
Mst�rix . - • - �
.�,
:��
;:j
- _..-- � -
� WEST i:INN LOGAL WETLAND INVEN�'ORY
Wetland: � a rns►'� Y. � . .
�'__p_i�►�'fu�t.�'t� �- � Code: ^ �� (.�,�i ' .
Locadon (addhax lot}: ' Plot #s (or off-site)
Cowardin/EiGM clasa: � ': "�- Fieid date: � �.��!
Rxent Weather _ �. /�1 Investigators: '
Summary (topo, land use, basis) � �— � '
Has the soil, vegeTation or hydrology be� significantly disiurbed7
S ecies / status
: +taS h+ �A�G
�c�� I���clr�. �i�'Gc�
. Sapliug / Shruh � �—..
- �rti ta�eS � F
. s Sa� �� _ .. v�L
a,h�.5 �`s f lEt� ;
�v—
�
. MepUnftN�: :, :r
\ Taxonamy:
status
.... ..,....,. �....o ..�..
Radox
Dom.
��.�l=r
,. �
Hydric So11 Indicators
.. Histosol �. Concretions / Nodules (w/in 3"; > 2 mm)
' � Histic Epipoc�on High organics near surface (sandy soils)
Sulfidic Odar . Organic pen (in ssndy soits)
Ralucing Conditions (tests positive) Hydric soils list and profile matchea
"__ Gleyod Otha � .
Redox. f� wlin 10 inches `.
� CrIteris met? � o i . * abundance / size / ccmhast / color / l4cation (matrix or.'pores)
. �1
0
Recorded clata a'vailable _ Aerial Phatographs Stream gauge
No rxoided data avai7able � Other '
�epth af Inundation: . ,Dcpth to saturation: . Depth to free wata:
i4l�ydrologic source:
�►dicators Secondary Hydralogy Indicators (2 or morej �
�, z
Inundatefl Oxidizefl root channels (uPPer 12°)
Saturated 'm upper I2 inches Water-stainal lesves
Wata Marlrs Loeai Soil Survey Data
� � Drift Lines FAG-Neutral Test
Sediment Deposits � ' Drnina,ge patteras
met? �_ Other:
z�::.
%p Cover � �OD
% Cover pom
�
� ' •� ��� FLIIlCt10AAl.SllIIIII18iy:
,� IIt�
� ���:u L�, • � -t- ' ; I .
� t3EKer sptcies: �rr� t'� t C� Sn �s,r;�+ti �i; .�. � .
� , �
Per�t of species that are OBL, FACW, FAC: $t3 .
Criterla met? ,�, " � .
%
WEST LINN LOCAL WETLAND INVENTORY
Wetland: � �' `� ,�,rs ..,sf,t..� ± � � �' S Y +�Q. W � " ��
de:
Location �add/ta�c lot): T- Plot #s (or off-site) �# (
Cowardin/HGM class: ��� ���Q�]' Fieid date: - - La2-
;j Recent Weather i �' Investigators: � ! ;
� Summary (topo, land use, basis) ,� �` ,�.�„�,�•-•-�;,�,r-y`
+r -
Has the sail, vegetation or hydrology been significantty disturbed? t..� ('j
S�ecies ! status _
�ix Gu.c� ` �`
$Apliilu 1 Chrufi
, P�5 b�
% COVCf
Dom. Species / status
✓ � �Ot�C„r,
r�-�
% Cover
o Cover
ocn� Sp�;�: .
��
Percent of,�species that are OBL, FACW, FAC: /po
Crlteria met2 � P 5
Map Unit Name: �/�
Taxonomy: �
Mat�ix •
�th Horizon Colo Redox
JJrainage class:
On hydric soils list?
Redox
nr,
Structure
.� •- �.���.�.,ter.�s��.�� - ��-.�:u:�•�,
� � �� �
Histosol
Histic Epipedon
Sulfidic Odor
Reducing Coi�ditions (tests positive)
Gleyed
✓ Redox. features w/in 10 inches
Criteria met2 U«
Concretions / Nodules (w/in 3' ;> 2 mm)
High organics near surface (sandy soils)
Organic pan (in sandy soils)
Hydric soils list and profile matches
Other
* abundance / size / contrast / color i location (mahix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other ,,
Depth of Inundarion: Depth to saturation:✓�CS'� Depth to freewater: �/
Hydrologic source: ,o7, . /,,�';,,,, �. ��� �,�,��.f � i.,,�.r.n�e
Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated . Oxidized root channels (upper 12")
�/ Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neutral Test
Sediment Deposits • . Drainage pattems
Criteria met? � p��
Wetland? � Functional summary:
Significant? •
�
/ �� � �� � ��,.
:::�.
���
� o�
�{- �-�- � z.. � � Z
�� �' .� `T �`��' �
�" G°„e-f' �-� ° � b
� ��t1uS_ (]+� ��-' �� '� .
A�C�r N�.Gr� • ���C �S ✓
ukk' ���"''`� � C„ � ,
�� r ��t - a. „ ✓
N��
S�' I O� D��' , � o
s ; . �r� ��k�t ��� acv ✓ -
� �e.l;� N�.... � o ,✓
R.�� �.� .� . ,-
�k��.s ��,r �c � r—,q� � �—
.� � �`�.� ?�' C,e�e.Y- t� S �
� �� � ��'_ � "� ui N � lc � `�
�l ]�
��.� se�,r, �.e�, j��^— "✓ —► �`
U �{�i G c� i ac c.q �J6 C-F- T� .
� o����o -��' a.+r�. c�g' �, Fjg, c �J, �/4-�. ______33_ 1'0
�-��' ,� � �� /y�+"'i` ' �:' t � �, UJ � V2� . f IE1 Z�
! �----
w� � .' ►�a
�: � . � ` '
�-� ��� �
� ,
we��� 7 N D �� a,� �t'�e
�.. ��Y�,�,K� ;
��� .
WEST LINN LOCAL WETLAND INVENTORY
Wetla��d: . (.U. +�t v�¢ ✓' �G�l -� �` �'fi��. Code: �� 7
Location (add/tax lot): �� Piot #s (or off-site) #
Cowardin/HGM class: '��� �v,,C'p.,E',�;T Field date: - Z.3'C� 2
Recent Weather Investigators: � ,�¢C
Summary (topo, land use, basis) 6byf /G�a� r/ v �'�✓°r��,r, �
Has the soil, vegetarion or hydrology been significantly disturbed? Nb •
Trees
Species /
_�� ��'�`�
_ ~� v l"�"Y;M.�.� . `
�__�._a.._ �.-,s x._.
Other species:
%
Dt� Herbs % Cover
Dom. Species / status - % Cover
�
% Cover
Percent of species that aze OBL, FACW, FAC: _�? �' �
Criteria met? �
Map Unit Name: /�/'P herc
Taxonomy: F���
Matrix
Depth Horizon Color
Hydric Soil Indicators
No
Structure
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests posidve) Hydric soils list and profile matches
Gleyed Other
Redox. feahues w/in 10 inches
Criteria met? �_ * abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: ---`- Depth to saLuration: Deptt� to free water:
Hydrologic source: .
Primary indicators Secondary Hydrolog,y Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines FAC-Neuh�al Test
Sediment Deposits Drainage pattems
Criteria met? �_ Other:
Wetland? 6��'ll b Functional summary: � � d�
Significant?
Drainage class:
On hydric soils list?
Concentrations* Redox
WEST LINN LOCAL. WETLAND INVENTORY
Wetland: � :c�a, �J @e�°` . .rs.�1 - { .� Code: �� ��
Location (add/ta�c lot): �0 �, c. �aC{ Plot #s (or of� site) �
CowardinlHGM class: • Field date: �I •. -2'�--t�.._, `
� Recent Weather Investigators: � L �
, Summary (topo, land use, basis) Q�,,�- �„� �� �,,,
Has the soil, vegetation or hydrology been significantly disturbed? . h Q
Other species:
Percent of species that aze OBL, FACW, FAC: �
Criteria met? . � � :
Map Unit Name: �;�" ��j� �!�r�'��� Drainage class: Gift(.( G7�iG'Lt,47
Taxonomy: �'�.rru a/,( �,�,;. .�/� �.�� On hydric soils list7 C� L— t'l b;
Matrix
Hydric Soil Indicators
Histosol Concrerions f Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Condirions (tests posifive) Hydric soils list and profile matches
Gleyed Other
✓ Redox. features w/in 10 inches
Criteria met? /��'j * abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available Other
Depth of Inundation: Depth to saturation: __�� Depth to free water:
Hydrologic source: g v Y�c.e -�l0,, �, ol y'p � ti•. t�,uJ
Primary indicators � Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in upper 12 inches � Water-stained leaves
Water Marks Local Soil Survey Data
Drift Lines � FAC-Neutral Test
Sediment Deposits � Drainage patterns f ` ,
Criteria met? � ," Other: J '-" t �'
S
'
Wetland? ,t�. �S Functional summary:
SigniFcant? ,
Trees % Cover ,3✓ Herbs ` % Cover U
WEST LINN LOCAL WETLAND INVENTORY
Wetland: �
Location (add/tax lot):
GowardinlHGM class: �
Recent Weather �j,p�
3ummary (topo, land use, basis)
� Code: (N.Z � O�"j
_ Plot #s (or off-site) 2
Field date: 6-Z7—O 2
Other species: �
Percent of species that are OBL, FACW, FAC:
Criteria met? yG„f
Hydric Soil 7ndicators
Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organics near surface (sandy soils)
Sulfidic Odar Organic pan (in sandy soils)
Reducing Condirions (tests positive) Hydric soils list and pmfile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? p,b * abundance / size / contrast / color / location (matrix or pores)
Recorded data available Aerial Photographs Stream gauge
No recorded data available - Other
Depth of Inundation: py _ �Depth to sahuation: �e�t�. Depth W free water: �
Hydrologic source: � � Gta 1 � - � - ,
Primary indicators Secondary $ydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated 'm upper 12 inohes Water-stained leaves
Water Marks Locai Soii Survey Data
Drift L'mes FAGNeutral Test
Sediment Deposits Drainage pattems
Criteria met? y�,p Other:
Wetland? �,y�,O _ Funetional sumxnary:
Significant? " �
Has the soil, vegetation or hydrology been significanfly disturbed? f1p
Map Unif Name: d(f' [.pp � Drainage class: (,t�(�( �f�,pZc�
TaxonomY� ��rce /i ��/ i U c�/o'� ua/LS On hydric soils list? {Q,o
r
Matruc • �
WES`I' LINN LOCAL WETLAND INVENTORY
Wetland: ,StSttareQ.1C_ �#aLe�` V�icA `1fl�ode: 1dT � — �
Location (add/talc lot): ' , (,�t'��Qyiy,�, �. '� . Plot #s (or off-site) 1
Coward'm/HGM class: Field date: 0 Z
Recent Weather - vesrigators:
SnmmaTY ( o, land use, b is) '
f'�' �'(o�e �a�s 6�w�,dP.wy: v�. :
Has the so�egetation or hydrology been sigmficanfly disturbed?
Trees % Cover Herbs % Cover
S ecies / status °/a Cover - Do S ecies / statas % Cover pom
�� �lar►uwi � w�a,rd � �O ✓
\
Sapling / Shrub
— j u��
� X�
Cover
�
• �thCl' SpeCles: '
Perc�t of species that are OBL, FACW, FAC: b0
Criteria met7 �� .
Map Unit Name: '�l
�"
Taxonomy: �'l,��u/ic.
_ _ Matrix.
' . � � llant6 Nnri�nn .F'nlnr
Drainage class: /.t�? �� �/r-ct � v�k�
On hydric soils lisY? � p
Hydric Soil Indicators .
� Histosol Concretions / Nodules (w/in 3' ;> 2 mm)
Hisdc Epipedon High organics near surface (sandy soils)
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) . Hydric soils list and profile matches .
Gleyed Other
� — Redox. features w/in 10 inches
Criteria met? y�S * abundance / size / contrast / color ! location (matrix or.pores)
Recorded data available Aerial Photogcaphs Stream gauge
No recorded data available Other
Depth of Inundation: �� Depth to saturation: -- Depth to free wafer: �_
Hydrologic source: q�� .� �G��.u.{� 4t�o'W tr
.. Primary indicators Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (uPPea' 12°)
Saturated in upper 12 inches —� Water-stained leaves �
�— Water Marks Loca1 Soil Survey Data
� — Drift L'mes FAC-Neutral Test
Sediment Deposits �— Drainage patterns
Criteria met? �� Other:
Wetland? Functional summary:
Significant?.
WEST LINN LOCAL WETLAND INVENTORY
Wetland: _�J� � � � , de: � � " D �p
� Location (add/tax lot): ., P1ot #s (ar off-site) D P 2.
� Cowardin/HGM class: Field date:_ ' Q 2
Recent Weather $ ��' Invesrigators:
3ummary (topo, land use; basis) 1��� , ld�t/�li
' Has the soil, vegetation or hydrology been significantly.disturbed? �f a
- _;;:;,.;�
Taxonomy:
�- � � o - - _ � � � � � i � e--- _ :�ce.u-ee
Hydric.Soil Indicators
Histosol • Concretions / Nodules (w/in 3' ;> 2 mm)
Histic Epipedon High organicsnear surface (sandy soils)
''1
Sulfidic Odor Organic pan (in sandy soils)
Reducing Conditions (tests positive) Hydric soils list and profile matches
Gleyed Other
Redox. features w/in 10 inches
Criteria met? N o * abundance / size / contrast / color / location (matrix or pores)�
. Recorded data available Aerial Photographs Stream gauge
No recorded data available . Other
Depth of Inundation: N/p. . Depth to saturatio�: rt�ryt,�, Depth to free wafer: µtl�+�-
Hydrologic source: e�ve.t 4to� .
Primary indicators �"�' Secondary Hydrology Indicators (2 or more)
Inundated Oxidized root channels (upper 12")
Saturated in. upper 12 inches . Water-stained leaves
' Water Marks � Local Soil Survey Data
Dtift Lines . � FAC-Neutral Test
Sediment Deposits Drainage patterns
Criteria met? , �� 0��:
Wetland? p _ Functional su�unary:
Significant?
Other species: '
Percent of species that are OBL, FACW, FAC:
Griteria met? �J p _
Matrix .
Horizon Color Redox Concentrations* Redox Denletions* Texture Struchue ..
Appendix E
Riparian Characterization
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Arbor Creek Riparian Code: AR-R-1
Location: Fern Geek to Skye Parkway Basin: Lower Wiliamette
T2S, R1E, Section: 14 Atlas map #: 4732, 4831-32 Reach Length: 5009 ft.
LWI wetland codes: N/A Photos:
Habitat sites:FE-II-1, RO-H-1 Field Date(s): 4/18/02, 6/6/02, 6/27/02
Adjacent Land Use: residential, commercial Investigators: TB, AK
General Comments
Fish bearing stream flows through a forested ravine along
the northern city limits, bordered by residential neighborhoods
and Marylhurst University. Confluence with Fern Creek is near
outfall to the Willamette River.
Riparian Characteristics
Stream type�`order: perennial, first order Channel type: ste� narrow vallev channel
Dom. soil type: Cascade silt loam, 30-60% slopes Gradient:❑ low (<2%) 0 mod (2-4%) �steep (9%)
Soil erosion potential: ❑ low � medium � high Side slopes: ❑<10% ❑ 10-20% ❑ 20-50% �>50%
WQ limited? ❑ yes � no Parameters: Active channel width: 3-12' depth: 1
Floodplain? � yes ❑ no Source: lower el. (on site) Channel width - valley width ratio: varies ]:1.5
Fish-bearing stream? � yes ❑ no Vegetated riparian width: 2� to >200'
Fish barriers: culverts Stream flow: ❑ none � low � medium ❑ high (rivers)
Road density: 1 crossing per 1252 linear feet Channel shade: ❑<25% � 25-50% �>50%
Large wood features: 40" sna�, 12-24" instream logs Banklchannel condition: �enerally stabie; some areas of erosion
Recruitment potential: ❑ low � medium 0 high Other water resources: ❑ ponds � wetlands ❑ springs
Notes: �ood instream structure, nests in alder, young cedar reQeneration
Vegetation (*dominant)
Trees 70% cover Shrubs
Doug fir*(>42°} Willow sp. Hazelnut*
Big leaf maple* Black hawthorne Osobeiry*
Western red cedar*(30") Oregon ash (in stream) Himal. blackberry
Red alder
Black cottonwood (24")
90% Native
Vine maple
Red elderberry
Snowberry
Assessment Results:
Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Sensitive Species
Low LJ Medium
Low � Medium
Low ❑ Medium
Low � Medium
Low � Medium
30% cover Herbs/E;mer
Salal Sword fem*
Baldhip rose Horsetail
English laurel English ivy
Licorice fern
Bracken fern
Pacific waterleaf
75% I�Tative
Comments
Combined score: � 55 �
Signifieant? � Yes ❑ No Basis: combined score, hiQh water quality, fish habitat
90% cover
Fringecup
Creeping buttercup
Robert's geranium
Lady fem
Western trillium
Reed canarygrass
65% Native
Restoration/Enhaneement Opportunities Restore �aps in ve�etated ri�arian corridor to improve habitat,
slope stabilization values; pre-treat stormwater discharges and remove instream obstacles for fish passa�e. Mana�e
invasiv�lant s ecies.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Barlow Creek
Location: Willamette River to Tomkins St.
T2S, R1E, Section; 24, 25 Atlas map#: 5034, 5134
LWI wetland codes: N/A
Habitat sites: WI-H-1
Adjacent Land Use: residential
Riparian Code: BA-R-1
Basin: Lower Willamette
Reach Length:1653'
Photos:
Field Date(s): 4/11/02. 6/27/02
Investigators: TB. AK
General Comments
Lower reach of Barlow flows thraugh a narrow, steep
ravine and is piped below WillametteView Ct. and
Failing St. before discharging to the Willamette River.
Riparian Characteristics
Stream type/order: perennial, first order Channel type: steep narrow vallev channel
Dom. soil type: Woodburn Silt Loam, 8-15% slopes Gradient:� low (<2%) Q mod (2-4%) � steep (11%}
Soil erosion potential: � low Q medium Q high Side slopes: ❑<10% ❑ 10-20% Q 20-50% �>50%
WQ limited? � yes � no Parameters: Active channel width: 3 depth: 1'
Floodplain? ❑ yes � no Source: Channel width - valley width ratio: 1�1
Fish-bearing stream? ❑ yes � no Vegetated riparian width: 25-150'
Fish barriers: culverts Stream flow: 0 none � low � medium � high (rivers)
Road density: 1 crossing per SSO linear feet Channel shade: �<25% � 25-50% �>50%
Large wood features: some small wood Bank/channel condition: moderately disturbed, enters nine
Recruitment potenrial: � low � medium 0 high Other water resources: � ponds � wetlands 0 springs
Notes: native flora holding on despite encroachment of blackberry and ivy
Vegetation (*dominant)
Trees 70% cover Shrubs
Big-leaf maple* English holly Salmonberry*
Llouglas fir* Omamental cherry Himal. blackberry*
Westem red cedar* Osobem
Black cottonwood I
80% Native
Assessment Results
Riparian Function
Water Quality .
Water Sources and Storage
Fish Habitat
Wildlife Habitat
Sensitive Species
Vine maple
Low
Low
Low
Low
Low
Combined score: I 42
55% cover
Thimbleberry
Ha2elnut
Oregon grape
Mock orange
Salal
50% Narive
Medium
Medium
Medium
Medium
Medium
Sign�cant? � Yes ❑ No Basis: State sensitive s�ecies
English ivy* (in trees)
fern
Comments
9U% cover
Creeping buttercup
Robert's geranium
Stinging nettle
Horsetail
40% Native
Restoration/Enhancement Opportunities: Mana�;e invasives• restore veQetative connectivity and
dayli�ht channel where possible.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Upaer Barlow Creek
Location: Barlow St. to Ibach Nature Park
TZS, R1E, Sectian: 25 Atlas map#: 5133, 5134
LWI wetland codes: N/A
Habitat sites: MA-H-2
Adjacent Land Use: residential, park / open space
Riparian Code: BA-R-2
Basin: Lower Willamette
Reach Length: 1806'
Photos:
Field Date(s): 8/30/O1, 4/11/02
Investigators: TB, AK, EL
General Comments
Smaller stream originating near Sahallie Illahee Park
and Ibach Nature Park; housing encroaching to edge
and across stream in this reach.
Riparian Characteristics
Streatn type/order: perennial, first order
Dam. soil: Xerochrepts and Haploxerolls, very stea�
Soil erosion potenrial: � low � medium � high
WQ limited? ❑ yes � no Parameters:
Floodplain? � yes � no Source:
Fish-bearing stream? � yes � no
Fish barriers: Pines
Road density: 1 crossing per 903 linear feet
Large wood features: occasional snags to 20" dbh
Recruitment potential: � low Q medium � high
Notes: mixed a eg s, bnt enerally voun er stock
Channel type: moderatel ��ep narrow valie�channel
Gradient:Q low (<2%} Q mod (2-4%) � steep (13%)
Side slopes: ❑<10% ❑ 10-25% � 25-50% 0>50%
Active channel width: 3' depth: 1'
Channel width - valley width ratio: 1:1.5
Vegetated ripazian width: 0-200'
Stream flow: Q none � low ❑ medium ❑ high (rivers)
Channel shade: 0<25% � 25-50% �>50%
Bank/channel condition: some sluffine, downcuttinQ
Other water resources: 0 ponds � wetlands Q springs
Vegetation (*dominant)
Trees 75% cover Shrubs
Big maple*(upl) Salmonberry*
70% cover Herbs/E
80% cover
Piggy-back
Red alder*(stream) � � Osoberry
Black cottonwood Red
Westem yew Vini
100% Native
Assessment Results
Ri arian Function Ratin
Watex uali ❑ Low ❑ Medium
Water Sources and Stora e ❑ Low � Medium
Fish Habitat � Low ❑ Medium
Wildlife Habitat ❑ Low � Medium
Rarity / Integrity ❑ Low � Medium
Combined score: I 50
wuiow sp.
Oregon grape
Dewbe
Nootka rose
Thimbleberry
75% Native
Lady fem* (strea
Water pazslay (s�
Pacific waterleaf
Westem dock
Inside out flo
Comments
Olive-sided fl
95% Native
Significant? � Yes ❑ No Basis: combined score, hi�h water qualitv, state sensitive species
Restoration/Enhancement Opportunities Remove and mana�e invasive shrubs: add dense buffer;
revegetate to reduce erosion and landslide hazard.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Bernert Creek Riparian Code: BE-R-1
Lacation: Willamette River to Johnson Dr. Basin: Upper Willamette
T2S, R1E, Sec: 35. 36; T3S, R1E, Sec: O1, 02 Atlas map #: 5431-3, 5531-3 Reach Length: 6527'
L�'VI wetland codes: BE-01. BE-02, W1-03 Photos: 1720
Habitat sites: WI-H-4. BE-H-1 Field Date(s): 4/22/02
Adjacent Laud Use: freewav, office, residential Investigators: TB, LW
General Comments
Upper Bernert follows I-205 embankinent and is highly
disturbed until it crosses Willamette Falls Drive, where it
enters a forested ravine and meets wetland W1-03.
Riparian Characteristics
Stream type/order: perenniaL first order Channel type` moderate �radient moderatelv confined channel
Dom. soil type: Cove Silt�Cla� Gradient:� low (<2%) � mod (2-4%) � mod steep (>4%)
Soil erosion potential: � low Q medium � high Side slopes: �<10% ❑ 10-20% � 20-50% Q>50%
WQ linnited? � yes � no Parameters: Active channel width: 2_6' depth: 1'
Floodplain? � yes � no Source: Channel width - valley width ratio: varies, >1:1.5
Fish-bearing stream? Q yes � no (potential) Vegetated riparian width: 0-200'
Fish barriers: culverts (dronsl Stream flow: � none � low � medium � high (rivers)
Road density: 1 crossing per 1305 linear feet Channel shade: ❑<25% � 25-50% �>50%
Large wood features: small amounts, several pools Bank/channel condition: dee�ly incised sections
Recruitment potentiaL• � low � medium � high Other water resources: Q ponds � wetiands � springs
Notes: lots of chorus fro�s, potential fish access to lower reach from Willamette River
Vegetation (*dominant)
Trees
Oregon ash*
Oregon white oak
Assessment Results:
Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Sensitive S�ecies
Combined score: I 38
Willow (wefland)
Pacific ninebark
Snowberry
Low
Low
Low
Low
Law
Significant? ❑ Yes � No Basis:
60% cover Shruhs 60% cover
nental cherry Himal. blackberry* Vine maple
B lack hawthom
Red alder
Pacific madrone
90% Native
Medium
Medium
Medium
Medium
Medium
Sitka elderberry
30% N
Her bs/Emergents 40% cover
Reed canary grass* (wet.) Fireweed
Tall fescue Lady fem
Sweet vernal grass Stinging nettle
Velvet grass Cleavers
Sword fem Bracken fem
English ivy (in trees) ScoYs broom
25% Native
Com ments
Restoration/Enhancement Opportunities: Restore ve�etative buffer in upner section; add native tress,
shrubs and herbaceous la�
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Bolton Creek
Location: Willamette River to Woodwinds Ct.
T2S, R2E, Section: 30 Atlas map #: 5135
LWI wetlands• N/A
Habitat sites: WI-H-1
Adjacent Land Use: residential, park / open space
Riparian Code: BO-R-1
Basin: Upper Willamette
Reach Length: 1043'
Photos:
Field Date(s): 6/27/02
Investigators: TB, AK
General Comments
Steep gradient reach through a forested ravine with mature
conifers, located partly in Burnside Park, flows into the
Willamette River across from Goat Island.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil: Xerochrepts and Haploxerolls, verv steep
Soil erosion potential: 0 low Q medium � high
WQ limited? Q yes � no Paraxneters:
Floodplain? Q yes � no Source:
Fish-bearing stream? ❑ yes � no
Fish barriers: drops near river
Road density: 1 crossing per 1043 linear feet
Large wood features: sna�4"
Recruitment potential: 0 low ❑ medium � high
Notes:
Vegetation (*dominant)
Trees 80% cover Shrubs
Douglas fir* (46") Hnnal. bl
Big-leaf maple*
Oregon ash
Osoberry"
Ornamental cherry
English holiy
80% native
Assessment Results
Water Quality
Water Sources aud
Fish Habitat
Wildlife Habitat
Raritv / InteQritv
Combined score: I 58
grape
Low
Low
Low
Low
Low
Channel type: steep narrow valle�channel
Gradient:❑ low (<2%) [] mod (2-4%) � steep (12%)
Side slopes: �<10% ❑ 10-20% Q 20-50% �>50%
Active channel width: 4 depth: 1
Channel width - valley width ratio: varies. 1:1.5
Vegetated riparian width: 100 to >200'
Stream flow: 0 none � low ❑ medium � high (rivers)
Channel shade: ❑ <25% 0 25-50% � >50%
Bank/channel condition: natural, stable, some erosion
Other water resources: � ponds � wetiands Q springs
35% cover Herbs/Emer
" Red elderberry English ivy* (in 1
Sword fem*
Twisted stalk
Spring beauty
) Pacific waterieaf
Stinging nettle
Lady fern
Watson's willow
70% native
Comments
Medium � Hi h
Medium ❑ Hi
Medium ❑ Hi h
Medium � Hi h
Medium 6� Hieh
100% cover
Fringecup
Pathfinder
Vanilla leaf .
False Solomon seal
Bracken fem
Trillium
Ciematis (in trees)
Cleavers
60% native
Significant? � Yes ❑ No BaSiS: combined score high water quality wildlife habitat, state sensitive species
Restoration/Enhancement Opportunities Remove / manage invasives, limit debris dumping, restore / ra�
vegetate eroded banks.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Camassia
Location: I-205 to Wilderness Park
T2S, R1E, Sec: 25; T2S, R2E, Sec: 30-31 Atlas map #: 5234, 5235, 5335
LWI wetland codes: CA-02, CA-03, CA-04, CA-OS
Habitat sites: CA-H-1
Adjacent Land Use: park / open space, school, residential
Riparian Code: CA-R-1
Basin: Lower Willamette
Reach Length:3203'
Photos:
Field Date(s): 4/4, 4/11/02
Investigators: TB. LW. AK
General Comments
pak / madrone community with poison oak and licorice fern.
Springfed perennial stream flows through mostly forested corridor
along edge of Wilderness Park and Camassia Natural Area, then is
piped most of the way to Willamette River. Stony soils / basalt
outcrops create unique habitats.
Riparian Characteristics
Stream type/order: perennial, first order Channel type: steep narrow valle�channel
Dom. soil type: Witzei VerYStonv Silt Loam, 3-40% sl. Gradient:❑ low (<2%) ❑ mod (2-4%) � steep (9%)
Soil erosion potential: 0 low � medium � high Side slopes: ❑<10% � 10-20% [] 20-50% Q>50%
WQ limited? � yes � no Parameters: Active channel width: 3 depth: 1
Floodplain? � yes � no Source: Channel width - valley width ratio: 1:1-1:2
Fish-bearing stream? ❑ yes � no Vegetated riparian width: 25 to >200'
Fish barriers: N/A Stream flow: ❑ none � low � medium 0 high (rivers)
Road density: 1 crossing per 1602 linear feet Channel shade: �<2,5% Q 25-50% �>50%
Large wood features: varietv of sna�s, some LWD Bank/channel condition: lower�art deeplv incised
Recruitment potential: � low 0 medium � high Other water resources: � ponds � wetlands � springs
Notes: braided channels, emergent wetland, unique habitats
Vegetation (*dominant)
Trees 70% cover Shrubs
Oregon white oak* Black cottonwood Snowberry'
Dougla fir*
big-leaf maple
Grand fir
Bitter cherry
Pacific madrone
Blac h awthom
English holly
Osoberry
O regon g (talI
Serviceberry
Oceanspray
Pacific ninebark
Himal. blackberry
90% Native
Assessment Results
Riparian Function
Water Quality
Water Sources and �
Fish Habitat
Wildlife Habitat
Sensitive Species
Combined score: I 60
Low
Low
Low
Low
Low
25% cover
ScoYs broom
Red flowering cunent
Vine maple
Red e
Westem
Dewberry
75% Native
Medium
Medium
Medium
Medium
sword fem*
Licorice fem
Stinging nettle
Western trillium
False Solomon se
English ivy
Inside out flower
Stream violet
Comments
90% cover
Pacific waterleaf
Creeping buttercup
Fringecup
Trout lilly
Reed canarygrass
70% Native
Significant? � Yes ❑ No BaS13: combined score high water qualitv hi�h wildlife habitat state sensitive species
Restoration/Enhancement Opportunities Manage invasive plant snecies and Dou�las fir encroachment in oak
woodland.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Cascade Springs Pond Creek
Location: Willamette River to Cascade St.
T2S, R2E, Section: 30 Atlas map #: 5235, 5236
LWI wetland codes: CS-01 .
Habitat sites: WI-H-1
Adjacent Land Use: residential, commercial
Riparian Code: CS-R-1
Basin: Lower Willamette
Reach Length: 2232'
Photos: 1719. 1720, 1904
Field Dafe(s): 4/22/02, 5/2/OZ
Investigators: TB, LW, AK
General Comments
Perennial springfed stream within a small forested ravine;
wide central terrace contains braided channels and
emergent wetlands.
Riparian Characteristics
Stream type/order: perennial, first order Channel type:
stee�narrow vallev channel
Dom. soil: Xerochrepts and Hanloxerolls, very steep Gradient:0 low (<2%) ❑ mod (2-4%) � steep (10%)
Soil erosion potential: Q low � medium � high Side slopes: ❑<10°/a ❑ 10-20% Q 20-50% �>50%
WQ limited? ❑ yes � no , Parameters: Acrive channel width: 2 depth: 1
Floodplain? � yes ❑ no Source: terrace fon-site� Channel width - valley width ratio: 1:1 to > 1:2
Fish-bearing stream? Q yes � no Vegetated ripazian width: 25-150'
Fish barriers: River Dr. culvert, 5-6' drou Stream flow: Q none � low ❑ medium 0 high (rivers)
Road density: 1 crossing per 11161inear feet Channel shade: �<25% Q 25-50% �>50%
Large wood features: 14"snaQS, small diameter debris Bank/channel condition: some downcuttin�, well ve e� tated
Recruitment potential: � low � medium � high Other water resources: � ponds � wetlands � springs
Notes: major i� problem upstream, potential amphibian breeding
Vegetation (*dominant)
Trees 75% cover Shrubs
Big-leaf maple* Hima1. Blackberry*
Black cottonwood" Snowberry'
Westem red cedar Salmonberry*
Dou�las fir Vine manle*
English holly Oregon grape
Red elderberr
90% Native
Assessment Results
Riparian Function
Water Quality
Water Sources and '.
Fish Habitat
Wildlife Habitat
Sensitive Snecies
Combined score: I 50
45% cover Herbs/Em
Pacific ninebazk
Hazlenut
Osoberry
Bamboo
Japanese maple
English laurel
30% Native
Low
Low
Low
Low
Medium
Medium
Medium
Medium
Medium
100% cover
solomon's seat Fringecup
Pacific waterleaf* Sword fem
Reed canarygrass* Twisted stalk
Western trillium Licorice fern
Bleeding heazt Piggy-back
Hooker fairy-betls Buttercup sp.
Wiid cucumber Clematis
Comments
SignlfiCant? � Yes ❑ No Basis: combined score high water qualitv, state sensitive species
Stinging nettl
Nightshade
Skw �k cabbage
Bittercress
Lady fem
Water p arsley
25% Native
Restoration/Enhancement Opportunities Remove trash• manage invasive species, particulart�w and
blackberrv.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Fern Creek
Location: Willamette River to Wa11in�WaX
T2S, R1E, Section: 13. 14 Atlas map #: 4732. 4832-3
LWI wetland codes: FE-02
Habitat sites: FE-H-1
Adjacent Land Use: residential
Riparian Code: FE-R-1
Basiu: Lower Willamette
Reach Length: 4050'
Photos:
Field Date(s): 4/18/02. 6/6/02
Investigators: TB. AK
General Comments
One of the longest uninterrupted stream reaches connected to the
Willamette River in the City. Channel meanders along floodplain
terrace bordered by steep forested slopes, then under Old River Rd.
in a 4' culvert before cascading down a rocky ledge 30' to the river.
Riparian Characteristics
Stream type/order: nerennial, first and second order Channel type: mod. gradient moderately confined channel
Dom. soil type: Woodburn Silt Loam, 8-15% slopes Gradient:Q low (<2%) � mod (2-4%) ❑ mod steep (>4%)
Soil erosion potential: � low � medium � high Side slopes: ❑<10% ❑ 10-20% � 20-50% ❑>50°/a
WQ limited? ❑ yes � no Pazameters: Active channel width: 4 depth: 1
Floodplain? � yes ❑ no Source: terrace (on site) Channel width - valley width ratio: vazies, >1.5
Fish-bearing stream? � yes ❑ no Vegetated riparian width: 25-400'
Fish barriers: none Stream flow: Q none � low ❑ medium ❑ high (rivers)
Road density: 1 crossing per 40501inear feet Channel shade: 0<25% � 25-50% �>50%
Large wood features downed 36 1oQS in stream.ls" sna�s Banklchannel condition: mostly stable, natural
Recruitment potential: [] low � medium � high Other water resources: Q ponds � wetlands 0 springs
Notes: unique, essenrially continuous reach, wel�connected riparian s sy tem
Vegetation (*dominant)
Trees
Westem red cedaz *(40")
Big-leaf maple*
Douglas fu* (40")
Red alder (stream)
Pacific Yew (10")
Omamental cherry
Assessment Results
Riparian Function.
Water Quality
Water Sources and Stora
Fish Habitat
Wildlife Habitat
Sensitive Species
75% cover Shrubs
cific dogwood Salmonberry*
Red-osier dogv
Osoberry*
Vine maple
Red elderberry
Hazlenut
95% Native
Low
Low
Low
Low
Low
Com6ined score: I 62
65% cover Herbs/Eme.
Oregon grape Sword fem*
od* Thimbleberry Pacific waterle�
^ Red huckleberry English ivy* (i�
Himal. blackberry Horsetail
Dewberry Fringecup
Snowberry Skunk cabbage
85% Native
Comments
Medium Hi h
Medium Hi
Medium Hi h
Medium � Hi
Medium �4 Hieh Fish, nileated
90% cover
Lady fem
Westem Trillium
Water pa rsley
Maidenhair fern
Licorice fem
Stinging nettle
70% Narive
Significant? � Yes ❑ No BaS1S: combined score, high water quality, fish & wildlife habita� state sensitive snecies
Restoration/Enhancement Opportunities Remove English ivy from trees and �,round surface; manaee
Himalayan blackberrv and other invasives. Evaluate options to improve terrestrial and aquatic habitat connections
to upper reaches.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Uauer Fern Creek Riparian Code: FE-R-2
Location: Rt. 43 to Carriage Way Open Space Basin: Lower Willamette
TZS, R1E, Section: 14, 23 Atlas map #: 4832, 4931-32, 5031 Reach Length: 4863'
LWI wetland codes: FE-1 Photos: N/A
Habitat sites: RO-H-1 Field Date(s): 6/6/02
Adjacent Land Use: residential Investigators: TB, AK
General Comments
Long, generally continuous reach through a steep forested
canyon with an emergent wetland and a small pond near
headwaters. Corridor crosses a series of open space lracts.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil type: Saum Silt Loam. 3a60% slopes
Soil erosian potential: Q low � medium � high
WQ limited? � yes � no Parameters:
Floodplain? 0 yes � no Source:
Fish-beariur►g stream? � yes ❑ no (ODFV�
Fish barriers: culverts
Road density: 1 crossing per 2432 lineaz feet
Lazge wood features: some laz�e snags, LWD
Recruitment potential: Q low � medium � high
Notes: long segment without crossin�s
Vegetation (*dominant)
Trees 80% cover Shrubs
Big-leaf maple* � � Himal. blackberry*
Westem red cedaz I I Nootka rose
Oregon ash
95% Native
Assessment Results
Water Quality
Water Sources and
Fish Habitat
Sensitive
Combined score: I 58
Low
Low
Low
Low
Low
Medium
Medium
Medium.
Medium
Channel type: steep narrow valley channel
Gradient:0 low (<2%) � mod (2-4%) � steep (10%)
Side slopes: Q<10% ❑ 10-20% Q 20-50% �>50%
Active channel width: 3-4' depth: 1'
Channel width- valley width ratio: l:1-1:1.5
Vegetated riparian width: 50 - >200'
Stream flow: ❑ none � low Q medium ❑ high (rivers)
Channel shade: Q<25% Q 25-50% �>50%
Bank/channel condition: moderatelv stable; natural/seminatural
Other water resources: � ponds � wetlands � springs
40% cover
Osoberry
Red e
Dougtas spiraea
Red-osier dogwood
Hazelnut
70% Narive
Herbs/Em
English ivy* (residential)
Pacific waterleaf
Lady fem
Small-fruited builcush
75% cover
Sloug hsedge
Cattail
Pileated
Velvet grass
Soft rush
80% Native
olive-sided
Significant? � Yes ❑ No BaSIS: combined score high water qualitv wildlife habitat state sensitive svecies
Restoration/Enhancement Opportunities Restore blackberrv dominated clearinQS with native trees and
shrubs. Explore stream daylighting opportunities in vicini ot�f Rt. 43.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: North Fritchie Creek
Location: Tualatin River to Wisteria Court
T2S, R1E, Section: 26-27, 34-35 Atlas map #: 5330, 5331
LWI wetland codes: FR-01, FR-02,FR-03, FR-�4
Habitat sites: FR-H-1; TCT-H-2
Adjacent Land Use: I-205, residential
Riparian Code: FR-R-1
Basin: Tualatin River
Reach Length: 3969'
Photos: 1486. 1487
Field Date(s): 3/20/02, 4/3/02
Investigators: TB, LW; AK
General Comments
Diverse, cedar dominated mixed riparian forest with
palustrine emergent wetlands at base of canyon slopes;
includes headwall seeps and an old beava pond.
Riparian Characteristics
Stream type/order: perennial, first and second order Channel type: moderate �radient moderatelv confined channe[
Dom. soil: Xerochrepts and Haploxerolls, verv steep Gradient:� tow (<2%) � mod (2-4%) � mod steep (>4%}
Soil erosion potential: ❑ low Q medium � high Side slopes: ❑<10% ❑ 10-20% � 20-50% ❑>50%
WQ limited? Q yes � no Pazameters: Active channel width: 3 depth: 1_2'
Floodplain? � yes ❑ no Source: FEMA, field Channel width - valley width ratio: varies, >1:2
Fish-bearing stream? � yes ❑ no (ODFVV) Vegetated ripazian width: 25 ->500'
Fish barriers: culverts limitin� Stream flow: Q none � low ❑ medium � high (rivers)
Road density: 1 crossing per 1885 linear feet Channel shade: ❑<25% � 25-50% �>50%
Lazge wood features: LWD (wetland, 36"); sna�s 14 Bank/channel condition: natural; lower end incised, eroded
Recruitment potential: 0 low Q medium � high Other water resources: � ponds � wetlands � springs
Notes: good mixed a�e cover both sides: regenerating cedars: old beaver dam, pond part of laxge wetland complex
Vegetation (*dominant)
Trees 55% cover Shrubs
Western red cedar* Black cottonwood Osoberrv'
Big-leaf maple*
G rand fu
Douglas fir
Red alder .
Pacific madrone
English holly
Cherry (omamental) Himal. Blackb�
Cascaza Hazelnut
Pacific willow Salmonberry
Red elderberry
Vine maple
Snowberry
90% Native
Assessment Results
Riparian Function
Water Quality
Flood Management
Fish Habitat
Wildlife Habitat
Low
Low
Low
Low
Low
score: I 62
45"/o cover HerbslEme
Thimbleberry Sword fem ('sl
Oregon grape Skunk cabbage
Pacific waterle,
Fringecup
Westem trilliur
English ivy
Common rush
75% Native
Medium
Medium
Medium
Medium
Medium
75% cover
Ree canarygrass (•wet
Stinging nettle
Few-seeded bitter cress
Licorice fem
brooklime
75% Native
Significant? � Yes ❑ No BaS1S: combined score, high water quality, flood mgmt; wildlife habita� rare snecies
Restoration/Enhancement Opportunities Removal and management of invasive plant species,
particularly canarYgrass, blackberry and ivy; restore gaps in v�etated corridor along; lower reach. Evaluate
opportunities for retrofittin� or reconstruction of a la�e arched culvert under I-205 to re-establish a linka�e to lower
Fritchie Creek and Tualatin River habitats.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: South Fritchie Creek Riparfan Code: FR-R-2
Location: Fritchie mainstem to Crestview Dr. Basin: Tualatin River
T2S, R1E, 5ection: 34, 35 At1as map #: 5330, 5331, 5430 Reach Length: 5660'
LWI wetland codes: FR-03 Photos: 1486, 1487
Habitat sites: FR-H-1 Field Date(s): 3/21/02
Adjacent Land Use: hi�hway, residential Investigators: TB, LW, EL
General Comments
Forested, generally narrow and fragmented reach with
park near headwaters. Includes large (>40" diameter)
cedars, firs and maples, and the oldest Pacific madrone
trees observed in the City, potentially in region.
Riparian Characteristics
Stream type/order: perennial, first order Channel type: moderatelv steep narrow valle,y channel
Dom. soil type: Xerochrepts and Haloxerolls, verv steep Gradient:❑ Iow (<2%) � mod (2-4%) � mod steep (8%}
Soil erosion potential: ❑ low � medium � high Side slopes: ❑<10% ❑ 10-20% � 20-50% �>50%
WQ limited? � yes � no Parameters: Active channel width: 3' depth: 1'
Floodplain? 0 yes � no Source: Channel width - valley width ratio: varies, >1:2
Fish-bearing stream? � yes � no (potential) Vegetated riparian corridor: 0-200'
Fish barriers: multiple culverts Stream flow: ❑ none � low � medium ❑ high (rivers)
Road density: 1 crossing per 708 linear feet Channel shade: ❑<25% � 25-50% �>50%
Large wood features: 24" cedar in stream - limited Bank/channel condition: mod to high alteration; limited erosion
Recruitment potential: ❑ low � medium 0 high Other water resources: ❑ ponds � wetlands � springs
Notes: mature trees provide �ood habitat, LWD recruitment potential
Vegetation (*dominant)
Trees 70% cover Shrubs
Red alder* Big-ieaf maple Snowberry*
Western red cedar* Ornamental cherry Osoberry*
Douglas fir* (>QO") Black hawthorn Salmonberry
Oregon white oak Pacific madrone (>40") Red elderberry
Black cottonwood English holly Red-osier dogv
95% Native
Assessment Results
Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Sensitive Snecies
Combined score: � 51
Low
Low
Low
Low
Low
60% cover Herbs/En
Vine maple Sword fern*
Dewberry
Himal. blackberry
Oregon grape (both)
80% Native
Piggy-back
Skunk cabb
Trout lily
English ivy
Medium
Medium
Medium
Medium
Medium
Comments
Pileated
60% cover
Wood fern
Fringecup
Native
Signifieant? � Yes ❑ No BaS1S: combined score, hiQh water quality; state sensitive species
Restoration/Enhancement Opportunities Restore and/or widen forested corridor where opporiunities
exist add dense native shrub buffer alone roads and edges where expandinp_ corridor not possible; remove invasives.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Gans Creek
Location: Kenthorpe Way to Rt. 43
T2S, R1E, Section: 24 Atlas map #: 4933
LWI wetlands• N/A
Habitat sites: TR-H-1
Adjacent Land Use: residential
Riparian Code: GA-R-1
Basin: Lower Willamette
Reach Length: 808'
Photos:
Field Date(s): 6/27/02
Investigators: TB, AK
General Comments
Small, narrow canyon in a residential neighborhood enters
culverts and pipes before it reaches Trillium Creek.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil type: Aloha Silt Loam, 3-6% slopes
Soil erosion potential: � low ❑ medium Q high
WQ limited? � yes � no Parameters:
Floodplain? � yes � no Source:
Fish-bearing stream? � yes � no
Fish barriers: culverts
Road density: 1 crossing per 4041inear feet
Large wood features: multiple 18" snaes
Recruitment potential: 0 low � medium � high
Notes: off-site inventorv from roads
Vegetation (*dominant)
Channel type: moderately steep narrow vallev channel
Gradient:0 low (<2%) � mod (2-4%) � mod steep (48%)
Side slopes: ❑<10% ❑ 10-20% � 20-50% Q>50%
Active channel width: 3' depth: 1'
Channel width - valley width ratio: 1:1-1:1.5
Vegetated riparian width: 25-100'
Stream flow: � none � low ❑ medium � high (rivers)
Channel shacle: 0<25% Q 25-50% �>50%
Bank/channel condition: multiple crossings, de rg aded
Other water resources: Q ponds Q wetlands ❑ springs
Trees 70% cover Shrubs 75% cover Herbs/Eu
Big-leaf maple* Black cottonwood Himal. blackberry* Oregon grape (tall) Engiish ivy*
Westem red cedaz Oregon white oak (36") Osobem Horsetail
Douglas fir
Mountain ash
ntal chercy Vine maple
ash Red-osier d
Snowberry
80% native
Assessment Results
Riparian Function
Water Quality
Water Sources and �
Fish Habitat
Wildlife Habitat
Sensitive Snecies
Combined score: ► 38
Low
Low
Low
Low
Significant? ❑ Yes � No Basis:
Lady fern
i Robert's geraniun
Reed canarygrass
35% native
Comments
Medium 0 Hi
Medium ❑ Hi h
Medium ❑ Hi h
Medium ❑ Hi
Medium n High
75% cover
fern
Restoration/Enhancement Opportunities Restore streambed and r�arian buffer; mana�e invasives.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Heron Creek Riparian Code: HE-R-1
Location: Willamette River to Rt. 43 Basin: Lower Willamette
T2S, R1E, Section: 24 Atlas map #: 4933-34, 5033 Reach Length: 3756'
LWI wetland codes: N/A Photos: N/A
Habitat sites: MA-H-1 Field Date(s): 5/23/02. 5/27/02
Adjacent Land Use: residental Investigators: TB, AK
General Comments
Spring fed stream flows through forests of M.S. Young State
Park and into a steep canyon with mature hemlock and fir
trees before passing residential area and making a steep
descent to the into Willamette River across from Cedar Island.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil type: Aloha Silt Loam, 3-8% slopes
Soil erosion potential: � low 0 medium Q high
WQ limited? � yes � no Pazameters:
Floodplain? � yes ❑ no Source: terrace (on-sitel
Fish-bearing stream? ❑ yes � no
Fish barriers: culverts
Road density: 1 crossing per 12521inear feet
L3Tge Wood feattlt'es: 40" cedar snag_good instream LWD
Recruitment potential: Q low Q medium � high
Notes: large patch with medium to lar e�trees
Vegetation (*dominant)
Douglas fir* Red al
Big-leaf maple* Biack
Oregon white oak Grand
Western red cedaz
English holly
Westem hemlock
Omamental cherry
Oregon ash
Assessment Results
Riparian Function
Water Quality
VJater Sources and I
Fish Habitat
Wildlife Habitat
Sensitive Species
Combined score: i 59
Douglas spiraea
Low
Low
Low
Low
Channel type: moderatelv steep narrow vallev channel
Gradient:❑ low (<2%) 0 mod (2-4%) � mod steep (6%)
Side slopes: ❑<10% ❑ 10-20% Q 20-50% �>50%
Active channel width: 4 depth: 1-2'
Channel width - valley width ratio: varies. >1:1.5
Vegetated riparian width: 50 to >200'
3tream flow: Q none � low ❑ medium ❑ high (rivers)
Channel shade: 0 CLS% Q 25-50% �>50%
Bank/channel condition: good condition despite gradient
Other water resources: Q ponds ❑ wetlands 0 springs
65% cover Herbs/EmE
Snowbecry English ivy* (i
Oregon grape (tall) Lady fern
Red-osier dogwood Stinging nettle
Thimbleberry Horsetail
Vine maple Sword fern
Pacific ninebazk Pacific waterle
Scouler willow Oxalis
Westem dock
80% Native
Gomments
Medium � Hi
Medium ❑ Hi
Medium � Hi
Medium � Hi
Medium (1 Hi�h
Significant? � Yes ❑ No Basls: combined score high water quality fish & wildlife habitat
75% cover Shrubs
cottonwood
95% Native
95% cover
65% Native
Restoration/Enhancement Opportunities: Remove iw: ra-vegetate with dense natives.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Unuer Heron Creek
Location: Larkspur to Pimlico Dr. /Sorrel
T2S, R1E, Section: 23, 24 Atlas map #: 5032-33
LWI wetland codes: N/A
Habitat sites: MA-H-2
Adjacent Land Use: residential, park
Riparian Code: HE-R-2
Basin: Lower Willamette
Reach Length: 960'
Photos:
Field Date(s): 5/23/02
Investigators: TB
General Comments
Spring fed perennial headwater stream with sma11 pond
near source flows through forested ravine before entering
pipe under Rt. 43 development.
Riparian Characteristics
Stream type/order: gerennial, first order Channel type: moderately steep narrow valle cY hannel
Dom. soil type: Saum Silt Loam, 30-60% slopes Gradient:� low (<2%) � mod (2-4%) � steep (19%)
Soil erasion potential: � low [] medium � high Side slopes: ❑<IO% ❑ 10-20% � 20-50% Q>50°/a
WQ limited? Q yes � no Parameters: Active channel width: 2 depth: <1'
Floodplain? Q yes � no Source: Channel width - valley width ratio: 1:1.5
Fish-bearing siream? [] yes � no Vegetated riparian width: 100 to >200'
Fish barriers: pipe at end of reach Stream flow: � none � low [] medium � high (rivers)
Road density: 1 crossing per 960 linear feet Channei shade: 0<2,5% 0 25-50% �>50%
Large wood features: 12"snags. lo s in pond Bank/channel condition: fair; Himal. blackberrv dom. upper
Recruitment potenrial: � low � medium � high Other water resources: � ponds Q wetlands 0 springs
Notes: recruitment better lower end; potential amphibian breeding
Vegetation (*dominant)
Trees 80% cover Shrubs
Red alder
Black cottonwood (18")
Westem red cedaz
Westem hemlock {planted)
Black hawthom
Omamental cherry
English holly
90% Native
Assessment Results
Riparian Function
Water Quality
Water Sources an@ ;
Fish Habitat
Wildlife Habitat
Raritv / Inte�ritv
Combined score: I 58
35% cover Herbs/Emer ents 90% cover
Oceanspray Large-leaved avens* Stinging nettle
Vine
Oregon grape
English ivy (neaz res.) Str. violet
Reed canary$rass (pond) Inside out f
Robert's geranium Trillium sp.
Fringecup Spring beaL
Horsetail Hookers fai
Lady fem Cleavers
Vanilla leaf Bracken fer
60%
Commeuts
few wetlands
Scouler willow
Hazelnut
Wild rose
Dewberry
huckleberry
70%
Low
Low
Low
Low
Low
Medium
Medium
Medium
Medium
Medium
Sligniflcant? � Yes ❑ No Basis: combined score high water quality, wildlife habitat
Restoration/Enhancement Opportunities Remove En h� 'sh iW from firs1major,problem)
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Marv S. Young Creek
Location: Willamette River to Rt. 43
T2S, R1E, Section: 24 Atlas map #: 5033-34
LWI wetland codes: N/A
Habitat sites: MA-H-1
Adjacent Land Use: park, residential
Riparian Code: MA-R-1
Basin: Lower Willamette
Reach Length: 3248'
Photos:
Field Date(s): 4/23/02, 6/27/02
Investigators: TB, LW, AK
General Comments
Relatively wide free-flowing stream bordered by steep forested
canyon walls. Upper segment is narrow and bordered by housing;
lower segment is in Mary S. Young Park and flows into
Willamette River after passing two trail culverts with signif�ant
drops (18" and 48"). Good off-channeUbackwater habitat at
confluence with river.
Riparian Characteristics
Stream type/order: nerennial, second order Channel type: moderatel ��stee,p narrow vallev channel
Dom. soil: Xerochrepts and Haploxerolls, very steep Gradient:❑ low (<2%) ❑ mod (2-4%) � mod steep (7%)
Soil erosion potentiai: � low Q medium � high Side slopes: ❑<10% ❑ 10-20% 0 20-50% �>50%
WQ limited? Q yes � no Parameters: Active channel width: depth: 18"
Floodplain? Q yes � no Source: Channel width - valley width rario: l:1-1:1.5
Fish-bearing stream? ❑ yes � no Vegetated riparian width: 50 to >200'
Fish barriers: large drop near river Stream flow: � none � low ❑ medium ❑ high (rivers)
Road density: 1 crossing per 16241inear feet Channel shade: �<25°/a 0 25-50% �>50%
Large wood features: 40" sna�s, downed wood Bank/channel condition: stable; natural_condition
Recruitment potential: � low Q medium � high Other water resources: 0 ponds � wetlands � springs
Notes: �ood river and easdwest linkage;_good potential fish habitat;pileated woodpecker habitat
Vegetation (*dominant)
Trees 70% cover Shrubs
Big-leafmaple* I Oregonash
Western red cedaz* Westem he:
white oak
English holly
90% Native
Assessment Results
Riparian Function
Water Quality
Water Sources and �
Fish Habitat
Wildlife Habitat
Raritv / Intearitv
Combined score: � 38
Oregon grape (tall)
Oregon grape (dull)
Osoberry
Hazelnut
Red-osier dogwood
Snowberry
English laurel
Low
Low
Low
Low
Low
70% cover Herbs/Emer ents 85% cover
Westem wahoo Sword fem* Lazgo-leaved avens
Thimbleberry English ivy* � Oregon oxalis
Scot's broom
Scouler willow
Pacific ninebazk
70% Native
Stinging n ett l e
Dewey' sedge
Maiden fem
Bleeding heart
Stream violet
Westem trillium
False solomon's
Medium
Medium
Medium
Medium
Pacific waterleaf I
75% Native
Comments
Pileated
Significant? � Yes ❑ No BaS1S: combined score high water qualitv wildlife habitat state sensitive species
Restoration/Enhancement Opportunities Reconstruct trail crossin s usin �bridg,es and restore free
flowin� channel connection to river; manage invasive exotic species.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Upuer Marv S. Youn� Creek Riparian Code: MA-R-2
Location: Rt. 43 to Miles Dr. Basin: Lower Willamette
T2S, R1E, Section: 24-26 Atlas map #: 5033, 5132-33 Reach Length: 3336'
LWI wetland codes: N/A Photos:
Habitat sites: MA-H-2 Field Date(s): 4/22/02
Adjacent Land Use: residential Investigators: TB, LW
General Comments
Steep gradient stream through narrow, forested ravine
fragmented by roads and housing; lower segment in open
space.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil: Xerochrepts and Haploxerolls, very steep
Soil erosion potential: Q Iow � medium � high
WQ limited? ❑ yes � no Parameters:
Floodplain? � yes � no Source:
Fish-bearing stream? � yes � no
Fish barriers: culvert - high �radient
Road density: 1 crossing per 1112 linear feet
Large wood features: LWD in stream. some sna�s
Recruitment potential: ❑ low � medium 0 high
Notes: g,00d pools, gravel / cobble substrate
Vegetation (*dominant}
Trees 85% cover Shrubs
alder
unental cherry
90% Narive
Western wahoo
Oregon grape
Assessment Results
Rinarian Function
Channel type: steep narrow vallev channel
Gradient:� low (<2%) � mod (2-4%) � steep (15%)
Side slopes: Q<10% ❑ 10-20% Q 20-50% �>50%
Active channel width: 4' depth: 1
Channel width - valley width ratio: varies, >l: l
Vegetated riparian width: 25 to >200'
Stream flow: ❑ none � low ❑ medium � high (rivers)
Channel shade: 0 <25% [� 25-50% � >50%
Banklchannel condition: stable, well ve etated
Other water resources: � ponds ❑ wetlands � springs
30°/a cover
Ha
E ngli sh l
Himal. blackberry
Red-osier dogwood
75% Native
English ivy* (in tree;
Pacific waterleaf*
Inside out flower
Hoo kers fairy-bell
Weste trill
Com ments
90% cover
Licorice fem
Stream violet
Lady fern
Stachy's hedge nettle
Sword fem
40% Native
Water Quali ❑ Low ❑ Medium
Water Sources and Stora e Low � Medium
Fish Habitat ❑ Low � Medium
Wildlife Habitat ❑ T,ow � Medium
Sensitive S ecies Low ❑ Medium
Combined score: 49
SignifiCant? � Yes ❑ No BaSis: high water gualitv
Restoration/Enhancement Opportunities: Remove iw from trees• mana�e invasive species. Restore
�aps in riparian corridor throu�h native tree and shrub plantings.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: McLean Creek
Location: Willamette River to Rt. 43 (under I-205 bridge)
T2S, R2E, Section: 30 Atlas map #: 5236
LWI wetlands: N/A
Habitat sites: WI-H-1
Adjacent Land Use: residential, park / open space
Riparian Code: MC-R-1
Basin: Lower Willamette
Reach Length: 1113'
Photos•
Field Date(s): 10/24/O1
Investigators: TB
General Comments
Small free-flowing stream within forested ravine flows
through McLean Park and cascades over rocky ledge
before entering the Willamette River. Invasive species
encroachment is high.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil type: Woodburn Silt Loam. 3-8%
Soil erosion potential: � low Q medium ❑ high
WQ limited? Q yes � no Parameters:
Floodplain? ❑ yes � no Source:
Fish-bearing stream? ❑ yes � no
Fish barriers: steep drop to Willamette River
Road densiTy: 1 crossing per 1113 lineaz feet
Large wood features: limited small snaQs
Recruitment potential: ❑ low � medium ❑ high
Notes: pere�xine falcon evrie on I 205 bridge
Vegetation (*dominant)
Channel rype: moderatelv steep narrow vallev channel
Gradient:❑ low (<2%) ❑ mod (2-4%) � mod steep (>4%)
Side slopes: ❑<10% ❑ 10-20% � 20-50% 0>50%
Active channel width: 3 depth: 1
Channel width - valley width ratio: 1:1-1:1.5
Vegetated riparian width: 50 to >200'
Stream flow: 0 none � low 0 medium 0 high (rivers)
Channel shade: Q<25% 0 25-50% �>50%
Bank/channel condition: some g�ding below I 205
Other water resources: ❑ ponds [] wetlands ❑ springs
Trees 60% cover Shrubs 25% cover
Big-leaf maple* (4') Black cottonwood Snowberry* Red elderberry
Western red cedaz Oregon ash Himal. Blackberry* Osobecry
Douelas fu Nootka rose
90% native
Assessment Results
Riparian Function
Water Quality
Water Sources and �
Fish Habitat
Wildlife Habitat
Rarity / Inte�riry
Combined score: I 47
Low
Low
Low
Low
Low
40% native
Medium
Medium
Medium
Medium
Medium
Significant? � Yes ❑ No Basis: state sensitive species
Comments
90% cover
40% native
on
Restoration/Enhancement Opportunities Remove iw and blackberry which have infested large areas of
the corridor. Reestablish diverse native floral communitv.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Maddox Creek
Location: Willamette River to Rt. 43
T2S, R2E, Section: 30 Atlas map #: 5135. 5235
LWI wetlands: N/A
Habitat sites: WI-H-1
Adjacent Land Use: residential, park / open space
Riparian Code: MX-R-1
Basin: Lower Willamette
Reach Length: 1550'
Photos:
Field Date(s): 4/4/02; 6/27/02
Investigators: TB. LW, AK
General Comments
Stream flows through steep narrow ravine with multiple
smaller tributaries. Enters new city park before dropping
steeply over the Willarnette River bank across from Goat
Island.
Riparian Characteristics
Stream type/order: perennial, fust order Channel type: moderately steep narrow vallev channel
Dom. soil: Xerochrepts and Haploxerolls, very stee� Gradient:❑ low (<2%) Q mod (2-4%) � mod steep (>4%)
Soil erosion potential: ❑ low [� medium � high Side slopes: ❑<10% ❑ 10-20% Q 20-50% �>50%
WQ limited? � yes � no Parameters: Active channel width: 3 depth: 1'
Floodplain? ❑ yes � no Source: Channel width - valley width ratio: varies, >i :I.S
Fish-bearing stream? Q yes � no Vegetated riparian width: 50-200'
Fish barriers: drop to river Stream flow: 0 none � low � medium � high (rivers)
Road density: 1 crossing per 780 tinear feet Channel shade: �<25% � 25-50% �>50%
Large wood features: multiple sna�s to 20" Bank/channel condition: natural / semi-natural
Recruittnent potential: 0 low � medium � high Other water resources: ❑ ponds � wetlands Q springs
Notes: mature trees provide g,00d habitat. LWD recruitment potential
Vegetation (*dominant)
Trees 25% cover
Black cottonwood* Red alder
Big-leaf maple* English holly
Douglas fir Sub* (36" ) Oregon white
Western red cedar
95% native
Assessment Results
Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Sensitive Species
Shrubs 25% cover
Himal. blackberry* Dewberry
Salmonberry Thimbleberry Strr►ging nettle
Osoberry Red elderberry Westem trillium
Vine maple Red-osier dogwood Pacific waterleaf
50% native
Ratin Comments
Low ❑ Medium � Hi
Low � Medium ❑ Hi h
❑ Low � Medium ❑ Hi
❑ Low ❑ Medium � Hi h
[� Low � Medium I� HiQh
Combined score: I 58
Signiflcant? � Yes ❑ No Basis: combined score, high water aualitv, wildlife habitat
75% cover
Lady fem
English iyy (in trees)
Momin gl ory
25% native
Restoration/Enhancement Opportunities: Restore and daYli�ht channel in new park.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Robin Creek Riparian Code: RN-R-1
Location: Trillium Creek to Carriage Way Basin: Lower Willamette
T2S, R1E, Section: 13, 14, 24 Atlas map #: 4832-33, 4932-33 Reach Length: 1507'
LWI wetland codes: N/A Photos:
Habitat sites: TR-H-1 Field Date(s): 6/6/02; 6/27/02
Adjacent Land Use: residential / commercial Investigators: TB, AK
General Comments
Narrow, mostly wooded reach dominated by blackberry
and ivy near homes and businesses; flows into Trillium
Creek, which supports cutthroat irout.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil type: Woodburn Silt Loam, 8-15% slopes
Soil erosion potential: � low ❑ medium ❑ high
WQ limited? ❑ yes � no Parameters:
Floodplain? � yes � no Source:
Fish-bearing stream?.Q yes ❑ no �potential
Fish barriers: culverts
Road density: 1 crossing per 5021inear feet
Large wood features: smaller sna s t� 12"
Recruihnent potential: Q low � medium ❑ high
Notes: blackberrv infested (hard to see)
Vegetation (*dominant)
Trees
B ig-leaf maple*
Red alder*
Engiish holly
Pacific madrone
Ornamental cherry
Black cottonwood (36")
Black hawthom
65% cover Shrubs
Douglas fir Himal. black�
Vine maple*
Hazelnut
Osoberry
Thimbleberry
Oregon grape
Dewberry
85% Native
Assessment Results
Channel type: steep narrow valle�channel
Gradient:� low (<2%) ❑ mod (2-4%) � steep (13%)
Side slopes: ❑<10% ❑ 10-20% � 20-50°/a 0>50%
Active channel width: 3 depth: 1
Channel width - valley width ratio: 1:1-1:1.5
Vegetated riparian width: 25 to >200'
Stream flow: � none � low Q medium � high (rivers)
Channel shade: Q<25% 0 25-50% �>50%
Bank/channel condition: e,g nerallv stable
Other water resources: 0 ponds � wetlands � springs
40% cover
Salmonberry
Pacific nine
Oceanspray
60% Native
Bracken fem
Sword fem
Inside out flower
Spring beauty
Stinging nettle
Juncus patans
Comments
90°/a cover
Piggy-back
Glyceria
Lady fem
Reed canarygrass
Maidenhair fern
Clematis
Dewey's sedge
65% Native
Ri arian Function Ratin
Water Quali ❑ Low ❑ Medium
Water Sources and Stora e � Low ❑ Medium
Fish Habitat ❑ Low � Medium
Wildlife Habitat � Low ❑ Medium
Sensitive S ecies � Low ❑ Medium
Combined score: 43
Significant? � Yes� ❑ No Basis: high water aualitv
Restoration/Enhancement Opportunities Mana�e invasives: buffer parkin� lots, roads, and homes with
dense native shrubs.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Upper Robin Creek Riparian Code: RN-R-2
Location: Wallin� Circle to Carriage WaX Basin: Lower Willamette
T2S, R1E, Section: 23 Atlas map #: 4932, 5032 Reach Length: 2035'
LWI wetland codes: N/A Photos:
Habitat sites: RO-H-1 Field Date(s): 6/6/02
Adjacent Land Use: residential Investigators: TB, AK
General Comments
Steep gradient headwaters reach flows through forested _
Wildwood Open Space, then into a pipe near Walling Circle.
Riparian Characteristics
Stream type/order: seasonal to perennial, first order
Dom. soil type: Saum Silt Loam, 3a60% slopes
Soil erosion potential: � low � medium � high
WQ limited? � yes � no Parameters:
Floodplain? ❑ yes � no Source:
Fish-bearing stream? � yes � no
Fish barr'iers: culvert
Road density: 1 crossing per 1018 linear feet
Large wood features: small snags to 12"
Recruitment potential: Q low � medium 0 high
Notes:
Vegetation (*dominant)
Channel type: steep narrow valley channel
Gradient:❑ low (<2%) 0 mod (2-4%) � steep (16%)
Side slopes: ❑ <10% ❑ 10-20% ❑ 20-50% � >50%
Active channel width: 3' depth: 1'
Channel width - valley width ratio: 1:1-1:2
Vegetated riparian width: 50 to >200'
Stream flow: ❑ none � low ❑ medium Q high (rivers)
Channel shade: ❑ <25% � 25-50% � >50%
Bank/channel condition: e� nerally stable
Other water resources: 0 ponds � wetlands Q springs
Trees 80% cover Shrubs 45% cover
Big-leaf maple* Vine maple* Red huckleberry
Douglu fir* Hazelnut Salmonberry
Red atder Osoberry Red elderberry
Pacific madrone Thimbleberry Pacific ninebar.
Black cottonwood Oregon grape (dull) Oceanspray
Omamental cherry Dewberry Himal. blackbe
Assessment Results
Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Sensitive Species
90% Native
Combined score: I 53
Herbs/Emer ents 95% cover
Sword fem* Piggy-back
Bracken fern Glyceria
Dewey's sedge
Inside out flower
Reed canarygrass
Maidenhair fem
Stinging nettle
75% Native �
tin Comments
Low ❑ Medium � Hi h
Low � Medium ❑ Hi
Low � Medium ❑ Hi
Low � Medium ❑ Hi
Low f Medium I Hieh
Significant? � Yes ❑ No Bas1s: combined score, high water qualitv
Cleave
60% Native
Restoration/Enhancement Opportunities Mana�e invasives primarilv in areas near roads and
residences.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/lteach: Robinwood Creek Riparian Code: RO-R-1
Location: Fern Creek confluence to HilIcrest Basin: Lower WilIamette
T2S, R1E, Section: 14, 23 Atlas map #: 4831-32, 4931 Reach Length: 5158'
LWI wetland codes: RO-01 Photos: 1719
Habitat sites: RO-H-1 Field Date(s): 4/23, 6/6, 6/27/02
Adjacent Land Use: residential, oQen space Investigators: TB, LW, AK
General Comments
A diverse, densely vegetated corridor; Robinwood Creek
emerges from a secluded hillside ravine, passes through a locally
rare Oregon ash-slough sedge wetland, then enters a steep,
forested canyon where it meets Fern Creek on city park land.
Riparian Characteristics
Stream rype/order: erennial first and second order Channel type: steep narrow vallev channet
Dom, soil type: Kinton Silt Loam, 15-30% Gradient:Q low (<2%) 0 mod (2-4%) � steep (10.5%)
Soil erosion potential: [] low � medium � high Side slopes: ❑<10% ❑ 10-20% Q 20-50% �>50%
WQ limited? 0 yes � no Parameters: Active channel width: 2 depth: 1-2'
Floodplain? � yes � no Source: Channel width - valley width ratio: 1:1-1:1.5
Fish-bearing stream? 0 yes ❑ no � potential Vegetated riparian width: 25 to >200'
Fish barriers: culverts. lar�e dro,Qat Willamette River Stream flow: Q none � low [� medium 0 high (rivers)
Road density: 1 crossing per 12901inear feet Channel shade: Q�'LS% [� 25-50% �>50%
Large wood features: 18" stream snass Ballk/Chanilel COridltlOri: seements of eroded banks. incised enamel
Recruitment potential: [] low � medium Q high Other water resources: 0 ponds � wetlands � springs
Notes: oak / madrone communitv on hillside roc , slopes
Vegetation (*dominant)
Assessment Results
Function
Low
Low
Low
Low
Low
Medium
Medium
Comments
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Raritv / inte�r'itv
Combined score: I 6
Medium
Medium
Significant? � Yes ❑ No BaSiS: combined score hiQh_water Qualitv wildlife habitat state sensitive species
Restoration/Enhancement Opportunities Man�e ivv and blackberry encroachment (city has started this work
on future park Iands) Explore options to imnrove terrestrial and aquatic habitat connectivitv at road crossings
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Salamo Creek Riparian Code: SA-R-1
Location: Tanner Creek to Weatherhill Rd. (along Salamo) Basin: Upper Willamette
T2S, R1E, Section: 35, 36 Atlas map #: 5333, 5432-33 Reach Length: 1747'
LWI wetlands: TA-01 Photos:
Habitat sites: TA-H-1 Field Date(s): 4/2/02, 6/21, 6/27/02
Adjacent Land Use: Residential, apriculture, open space Investigators: TB, LW, AK
General Comments
Fragmented corridor with three on-line stormwater
facilities in developed areas; enters low gradient well-
vegetated segment before confluence with mainstem
Tanner Creek.
Riparian Characteristics
Stream type/order: perennial, first order Channel type: moderately steep narrow vallev channel
Dom. soil type: Bor eQ s Siltv Clav Loam, fl-8% Gradient:0 low {<2%) 0 mod (2-4%) � mod steep (>4%}
Soil erosion potential: � low ❑ medium 0 high Side slopes: ❑<10% ❑ 10-20% � 20-50% 0>50%
WQ limited? ❑ yes � no Parameters: Active channel width: 3_6' depth: 1_2'
Floodplain? � yes ❑ no Source: terrace (on-site� Channel width - valley width ratio: varies, >1:1.5
Fish-bearing stream? � yes � no Vegetated riparian width: 25 to >100'
Fish barriers: culverts Stream flow: ❑ none � low ❑ medium ❑ high (rivers)
Road density: 1 crossing per 349 linear feet Channel shade: ❑<25% ❑ 25-50% �>50%
Large wood features: LWD alonQ stream, 12" snags Bank/channel condition: fragmented braided areas
Recruitment potential: ❑ low � medium ❑ high Other water resources: � ponds � wetlands ❑ springs
Notes: re�ional stormwater facility at head�Taters; potential septic system failures
Vegetation (*dominant)
Trees 25% cover Shrubs
Big-leaf maple* L,ocust Himal. blackberry*
Red alder* Crrand fir Red osier dogwood* (wet)
Oregon white oak Douglas fir Red elderberry
Black cottonwood Black hawthorn Vine maple
Westem red cedar
80%
Salmonberry
Assessment Results
25% cover Herbs/Emer ents
Reed canarygrass* (wet)
35% native
Ri arian Function Ratin
Water Quality ❑ Low � Medium
Water Sources and Storage ❑ Low � Medium
Fish Habitat ❑ Low � Medium
Wildlife Habitat � Low ❑ Medium
Sensirive S ecies � Low ❑ Medium
Combined score: 44
Significant? � Yes ❑ No Basis High water qualitv
Sword fern*
Morning glory
Horsetail
Comments
80% cover
Lady fem
Water parsley
Foxglove
Tall fescue
Clover sp.
20% native
Restoration/Enhancement Opportunities Greater use of dense native emer�ents on stormwater facilities
may improve water quality and habitat values; repair facility se�tic svstems. Large scale clearinQ of blackberrv and
native re-ve�etation mav be warranted, particularlv on lower se�ment•
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Sunset Creek
Location: Sunset Ave. to Charman St.
T2S, R1E, Section: 36 Atlas map #: 5334
LWI wetlands: N/A
Habitat sites: WI-H-2
Adjacent Land Use: residential
Riparian Code: SU-R-1
Basin: Unver Willamette
Reach Length: 758'
Photos:
Field Date(s): 6/27/02
Investigators: TB, AK
General Comments
Short surface segment of mostly piped stream, flows
through blackberry and invasive gr�s dominated
residential back yards and along roadsides.
Riparian Characteristics
Stream type/order: �erennial, first order
Dom. soil type: Saum Silt Loam, &15% slone
Soil erosion potential: � low Q medium � high
WQ limited? ❑ yes � no Parameters:
Floodplain? � yes � no Source:
Pish-bearing stream? 0 yes � no
Fish bazriers: N/A
Road density: 1 crossing per 379 linear feet
Large wood features: none
Recruitment potential: � low Q medium Q high
Notes: isolated from habitat areas
Vegetation (*dominant)
Trees
B lack hawthom
Pacific willow
Apple sp.
15% cover Shrubs
s fir Himal. blackberry*
alder
sp.
cherry
% narive
Assessment Results
Riparian Function
Water Quality
Water Sources and �
Wildlife Habitat
Low
Low
Low
Low
Low
Combined score: I 29'
Significant? ❑ Yes � No Basis:
Channel type: moderately steep narrow vallev channel
Gradient:� low (<2%) Q mod (2-4%) � mod steep (4-8%)
Side slopes: �<10% ❑ 10-20% Q 20-50% Q>50%
Active channel width: 2 depth: 1'
Channel width - valley width ratio: varies, > 1:1
Vegetated riparian width: 0-25'
Stream flow: ❑ none � low � medium 0 high (rivers)
Channel shade: � <25% � 25-50% ❑ >50%
Banlc/channel condition: hi�hlv modified and de�raded
Other water resources: 0 ponds � wetlands 0 springs
Medium
Medium
Medium
Medium
Medium
60% cover
Reed canarygrass
IvToming glory
Comments
70% cover
Restoration/Enhancement Opportunities Restoration of stream channel and riative riparian ed e�to
create a residential amenitv.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Tanner Creek Riparian Code: TA-R-1
Location: Willamette River to $eacon Hill Ct. Basin: Upver Willamette
T2S, R1E, Section: 36 Atlas map #: 5333. 5433-34 Reach Length: 5233'
LWI wetland codes: TA-08. TA-09, TA-10 Photos: 1904
Habitat sftes: TA-H-1 Field Date(s): 5/2/02
Adjacent Land Use: residential Investigators: TB
General Comments
Narrow, mostly wooded stream corridor with several
streamside wetlands and two ponds; descends from
Beacon Hi11 area to Imperial Dr. then in pipes and over
rock ledges to the Wiilamette River.
Riparian Characteristics
Stream type/order: perrenial; second order Channel type: moderately stee� narrow vallev channel
Dom. soil type: Bor es silty ciay Ioam, 0-8% slapes Gradient:Q Iow (<2%) Q mod (2-4%) � mod steep (>4%)
Soil erosion potenrial: � low [� medium Q high Side slopes: �<10% ❑ 10-20% � 20-50% [� >50%
WQ limited? ❑ yes � no Parameters: Active channel width: 3 depth: 1;2'
Floodplain? 0 yes � no Source: Channel width - valley width rario: 1:1 to 1:2
Fish-bearing stream? � yes ❑ no Vegetated riparian width: 25 to >100'
Fish barriers: culverts, steep dro�s Stream flow: ❑ none � low � medium ❑ high (rivers)
Road density: 1 crossing per 872 linear feet Channel shade: ❑<25% Q 25-50% �>50%
Lazge wood features: some sna�s Bank/channel condition: high development, boulders
Recruitment potential: � low [] medium Q high Other water resources: � ponds � wetlands � springs
Notes: ponds provide stillwater habitat, potential amnhibian breeding
Vegetation (*dominant)
Trees 60% cover Shrubs
Black cottonwood* Black hawthorn Red osier
Oregon
Grand fir
DouQlas fir
Oregon white oak Rose (exotic)
Pacific willow Himal. blackl
Scot's broom
95% Native
Assessment ResuIts
40% cover Herbs/Emer�e
r willow Reed canarygrass•
Red elderberry Spreading
5itka willow Dewey's s
Teasel
40% Native
Signifleant? � Yes ❑ No Basis: combined score, state sensitive species
80% cover
Skunk cabbage
Grooved rush
Water pazstey
3 5% Native
Restoration/Enhancement Opportunities: Restoregaps in ve�etated ripaxian corridor• plant native trees
and shrubs to improve structural diversity, buffering values• manage invasives
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Unaer Tanner Creek
Location: Beacon Hill Ct. to Rosemont Rd.
T2S, R1E, Section: 25,26,36 Atlas map #: 5232-5333
LWI wetiand codes: TA-01 through TA-07
Habitat sites: TA-H-1
Adjacent Land Use: residential, agriculture
Riparian Code: TA-R-2
Basin: Upper Willamette
Reach Length:4230'
Photos: 1904
Field Date{s): 5/16/02
Investigators: TB, AK
General Comments
Moderate gradient headwater reach with several smaller .
tributaries, stream associated wetlands, and four ponds.
New housing developments on south side of stream were
under construction at time of surveys..
Riparian Characteristics
Stream type/order: perennial, first order
Dorn. soil type: Deiena Silt Loam, 3-12% slone
Soil erosion potential: Q Iow Q medium � high
WQ limited? ❑ yes � no Parameters:
Floodplain? � yes ❑ no Source: limited (on site�
Fish-bearing stream? � yes ❑ no
Fish barriers: culverts, modified channel
Road density: 1 crossing per 10581ineaz feet
Large wood features: snags to 24"
Recruitment potential: � low � medium Q high
Notes: braided channeIs, chorus fro�s, limited conifers
Vegetation (*dominant)
Trees 60% cover Shrubs
Oregon ash* Oregon white oak Snowberry*
Red alder* Black hawthorn Osoberry
Pacific willow Salmonbem
Black cottonwood Hazelnut
Big-leaf maple Vine maple
Douglas fir Dewberry
% Native
Assessment Results
Riparian Function
Water Quality
Water Sources and �
Fish Habitat
Wildlife Habitat
Sensitive Snecies
Low
Low
Low
Low
Low
Channel type: moderate narrow valley channel
Gradient:� low (<2%) � mod (2-4%) � mod sieep (>4%)
Side slopes: ❑<10% � 10-20% Q 20-50% �>50%
Active channel width: 3-5' (braided areas) depth: 1'
Channel width - valley width ratio: varies, >1:1.5
Vegetated riparian width: 25 to >100'
Stream flow: � none .� low Q medium Q high (rivers)
Channel shade: Q<25% � 25-50% �>50%
Bank/channel condition: fair - rock lined in places
Other water resources: � ponds � wetlands � springs
40% cover
St inging nettle*
Reed canarygrass
Sword fe
Cleavers
English i vy
Giant horsetail
' 85% cover
Water pazsley
Buttercup sp.
Common msh
Himal. blackberry
Willow sp.
Rose sp.
% Native
Medium
Medium
Medium
Medium
Medium
Comments
Combined score: I 51
Significant? � Yes ❑ No Basis: combined score�hi�h flood mana�ement, rare species
Fringecup
Common camas
% Native
Restoration/Enhancement Opportunities Restore native vegetation buffers along streams and wetlands;
plant cedar and other conifers to diversify habitat: remove obstacles for fish passa�.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Trillium Creek Riparian Code: TR-R-1
Location: Willamette River to Rt. 43 Basin: Lower Willamette
T2S, R1E, Section: 25 Atlas map #: 4833, 4933 Reach Length: 6063'
LWI wetland codes: TR-03, TR-04 Photos: 1719
Habitat sites: TR-H-1 Field Date(s): 4/2/02
Adjacent Land Use: residential Investigators: TB. AK
General Comments
Lower reach of perennial stream with multiple associated wetlands
and ponds; supports cutthroat trout. Diverse habitat - though housing
constrains and encroaches on corridor in certain areas. Stream flows
into 4' culvert with 6" drop under Calaroga Dr. and through step
pools before reaching Willamette River.
Riparian Characteristics
Stream type/order: perennial, first and second order
Dom. soil type: Woodburn Silt Loam 8-15% slopes
Soil erosion potential: � low ❑ medium 0 high
WQ limited? � yes � no Parameters:
Floodplain? � yes ❑ no Source: tenace (on site�
Fish-bearing stream? � yes ❑ no
Fish barriers: culverts (limiting)
Road density: 1 crossing per 1010 linear feet
Large wood features: well used sna�s, some LWD
Recruitment potential: ❑ low � medium � high
Notes: diverse wetland habitats in lower se�
Vegetation (*dominant)
Trees 50% cover Shrubs
Western red cedar* Grand fir Osoberry*
Big-leaf maple* Orn. cherry Red-osier dog
Red alder pouglas fir Thimbleberry
Western hemlock Salmonberry
Pacific dogwood Hazelnut
95% Native
Assessment Results
Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Combined score: � 57
Low
Low
Low
Low
Low
Medium
Medium
Medium
Medium
Medium
Channel type: moderatel�p narrow vallev channel
Gradient:❑ low (<2%) ❑ mod (2-4%) � mod steep (7%)
Side slopes: ❑ <10% ❑ 10-20% � 20-50% ❑ >50%
Active channel width: 3 depth: 1
Channel width - valley width ratio: varies, >1:2
Vegetated riparian width: 25-200'
Stream flow: ❑ none � low � medium [] high (rivers)
Channel shade: ❑ <25% ❑ 25-50% � >50%
Bank/channel condition: good, incised in res. fill areas
Other water resources: � ponds � wetlands � springs
60% cover Herbs/Er
Japanese knotweed Sword fern*
Himal. blackberry Pacific waterleaf*
English laurel English ivy*
Vine maple Stinging nettle
Horsetail
60% Native
90% cover
Skunk cabbage
Large-leaved avens
Cooley's hedge nettle
Lady fern
Bracken fern
75% Native
Comments
diverse wetland ha
cutthroat trout
Significant? � Yes ❑ No BaSIS: combined score, high water qualitv, flood mgmt, fish habitat, state sensitive species
Restoration/Enhancement Opportunities Mana�e to preserve fish habitat and wetland complex; remove
and manage exotic invasives; limit housing / road impacts.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Upper Trillium Creek Riparian Code: TR-R-2
Location: Rt. 43 to Rosemont Rd. Basin: Lower Willamette
T2S, R1E, Section: 23, 24. 26 Atlas map #: 4933, 5031-3, 5131 Reach Length: 5500'
LWI wetland codes: TR-01, TR-02, TR-03. TR-04 Photos: 1719
Habitat sites: MA-H-2 Field Date(s): 9/20/O1, 4123/02
Adjacent Land Use: residential, park / open space Investigators: TB, LW, EL
General Comments
Well vegetated upper reach originating from springs in ash forest on school
district lands and flowing through mixed forest in Hidden Springs open space.
Riparian Characteristics
Stream type/order: perennial, first order Channel type: moderatelY steep narrow vallev channel
Dom. soil type: Saum Silt Loam. 30-60% slo�es Gradient:Q low (<2%) Q mod (2-4%) � mod steep (9%)
Soil erosion potential: � low Q medium � high Side slopes: ❑<10% ❑ 10-20% � 20-50% ❑>50%
WQ limited? ❑ yes � no Parameters: Active channel width: 3' depth: 1'
Floodplain? � yes � no Source: Channel width - valley width ratio: 1:1.5
Fish-bearing stream? � yes ❑ no Vegetated riparian width: 25 to >200'
Fish barriers: culverts limitin� Stream flow: [] none � low 0 medium 0 high (rivers)
Road density: 1 crossing per 1833 linear feet Channel shade: 0<25% � 25-50% �>50%
Large wood features: downed laz�e wood 40" snags Bank/channel condition: stable, well ve et� ated
Recruitment potential: ❑ low � medium � high Other water resources: � ponds � wetlancls � springs
Notes: Relativelv intact reach lar�el�open space; hi�hest qualitv rid,�e canvon in Citv.
Vegetation (*dominant)
Trees 85% cover Shrubs
Ureeon white oalc* Black cottonwood Himal. bl
Black hawthom* Westem hemlock
Douglas fu* Grand fir
Oregon ash* (wet.) Red alder
Westem ced cedar"` English holly
Big-leaf maple' Omamental cherry
90% Nati�
Assessment Results
Riparian Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habita.t
Sensitive Snecies
Combined score: I 64
Significant? � Yes ❑ No
Low
Low
Low
Low
Low
Red-osier dogwoo
Osoberry
Thunbleberry
D
Snowberry
❑ Medium
� Medium
❑ Medium
❑ Medium
n Medium
65% cover Herbs/E
;ific ninebark Comtnon (
wuiow sp. ru eH
Oceanspray False
fern
80% Native
80% cover
90% Native
Olive-sided
BaSiS: cambined scare, hsgh water qualitv, fish & wildlife habitat, state sensitive species
Restoration/Enhancement Opportunities Restore �ans in rinarian corridor: plant native trees, enhance
connectivitv at road crossin�s (includin R� t. 43) potentiallv using bridges
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Tualatin River Riparian Code: TU-R-1
Location: Willamette River to Borland Brid�e Basin: Tualatin River
T25, R1E, Sec: 34; T3S, R1E, Sec: 02, 03 Atlas map #: 5429, 5529-31, 5631Reach Length: 8483'
LWI wetland codes: TU-01. TU-02, TU-03 Photos: 1486, 1487
Habitat sites: WI-H-1, TU-H-1 Field Date(s): 8/30, 9/20/O1; 3/20/02
Adjacent Land Use: residential, parks / open space Investigators: TB, LW. AK, EL
General Comments
Swift flowing lowest reach of Tualatin River before confluence
with Willamette River; well vegetated conidor with large forested
hillside to south and residential areas of West Linn to north.
Riparian Characteristics
Stream type/order: perennial, hipher order
Dom. soil type: Cloquato and Saum Silt Loams
Soil erosion potential: 0 low � medium � high
WQ limited? � yes ❑ no PaYameteTS: bacteria temp
Floodplain? � yes ❑ no Source: FEMA
Fish-bearing stream? � yes ❑ no
Fish barriers: none
Road density: 1 crossing per 4242 linear feet
Large wood features: 36" snags / LWD on bank
Recruitment potential: ❑ low � medium ❑ high
Notes: remnant slou�Oxbow� seasonal waterfall
Vegetation (*dominant)
Trees 80% cover Shrubs
Douglas fir* (slopes) Ornamental cherry Himal. Bl
Westem red cedar � Snowberry*
Pacific willow* Black hawthom
Big-(eaf maple* (sl.) English holly
Red alder
Oregon white oak
Pacific madrone
Grand fir
100% Nati
Assessment Results
Ri arian Function R�
Water Quali [
Water Sources and Storage [
Fish Habitat
Wildlife Habitat [
Sensitive S ecies [
Combined score: 62
Vine maple
Low
Low
Low
Low
Low
Channel type: low gradient medium floodplain channel
Gradient:� low (<2%) 0 mod (2-4%) ❑ mod steep (>4%)
Side slopes: ❑<10% ❑ 10-20% � 20-50% Q>SO%
Active channel width: 60-300' depth: 3-12'
Channel width - valley width ratio: 1:1-1:1.5
Vegetated riparian width: 50-200' (from top of bank)
Stream flow: Q none ❑ low 0 medium � high (rivers)
Channel shade: 0 CL5% � 25-50% �>50%
Bank/channel condition: natural / semi-natural
Other water resources: � ponds � wetlands 0 springs
55% cover Herbs/Emer ent;
Osoberry Reed canarygrass* (w
Oregon grape Sword fem*
Dougias spiraea Licorice fem (on oak)
Pacific ninebark Tall fescue (new pazk;
Poison oak English ivy
Evergreen blackberry Japanese lrnotweed
Oceanspray I Stinging nettle
60% Native
Comments
Medium Q� Hi h
Medium ❑ Hi
Medium � Hi h
Medium � Hi ti
Medium ❑ Hi Salmon, p
bald eagle
90% cover
Tease
Bracken fem
Piggy-back
Sloug
Bentgrass
40% Native
Significant? � Yes ❑ No BaS1S: comliined score, high water qualitv fish & wildiife habitat state sensiti� species
Restoration/Enhancement Opportunities Plant native shrubs and trees to diversifv mid-canopv / understory
lavers; manaee invasive species.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Upner Tualatin River Riparian Code: TU-R-2
Location: Borland Brid e to Citv Limits (Fritchie Creek) Basin: Tualatin River
T2S, R1E, Section: 34 Atlas map #: 5330. 5429-30 Reach Length: 4939'
LWI wetland codes: Til-01, TU-02. TLT-43, T[J-04, TU-OS Photos: 1486. 1G87
Habitat sites: TU-H-1 Field Date(s): 3/20/02, 3/2ii02
Adjacent Land Use: residential, open space Investigators: TB. LW
General Comments
Broad Tualatin Valley floodplain with associated wetlands
narrows into forested canyon z�ear Borland Bridge. A
steep forested ridge separates the floodplain terrace (open
space) from the upland terrace (housing).
Riparian Characteristics
Stream typelorder: perennial, higher order Channel type: law �radient medium floodplain channel
Dom. soil: Xerochrepts and Haploxerolls, verv steep Gradient:� low (<2%) � mod (2-4%) � mod steep (>4%)
Soil erosion potential: � low [] medium � high Side slopes: ❑<10% � 10-20% 0 20-SO% 0>50%
WQ limited? � yes ❑ no Parameters: bacteria. temQ Active channel width: 80-150' depth: 3-12'
Floodplain? � yes ❑ no Source: FEMA Channel width - valley width ratio: varies, > 1:1.5
Fish-bearing stream? � yes ❑ no Vegetated riparian width: 25-200' (from top of bank)
Fish barriers: none Stream flow: � none ❑ low ❑ medium � high (rivers)
Road density: 1 crossing per 4939 linear feet Channel shade: �<25% � 25-50% [] >50%
Large wood features: some large sna�s Bank/channel condition: natural / semi-natural (some fill)
Recruitment potential: � low � medium � high Other water resources: 0 ponds � wetlands Q springs
Notes: Fritchie Creek confluence is at upstream end of reach.
Vegetation (*dominant)
Trees 45% cover Shrubs
fir (40") Big-leaf maple
yew English holly
90% Native
Assessment Results
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Sensirive Species
Osoberry
Low
Low
Low
Low
Low
Combined score: I 60
25% cover Herbs/Emer E
Ha z e lnut Sword fem*
Douglas spiraea Reed canarygrass*
Himal. blackberry Bracken fem
70% Native
Comments
Medium
Medium
Medium
Medium
Medium
Pileated
90% cover
Licorice fem (trees)
Bent g
Velvet grass
25°lo Native
salmon
Sign�Cant? � Yes ❑ No BasiS: combined score hi�h fish habitat, wildlife habitat, state_sensitive species
Restoration/Enhancement Opportunities Restore ga s in veg.etated shoreline; mana�e invasive s ecies,
particularlv grasses and emer�ents, and Himalayan blackberrx.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Turkev Creek Riparian Code: TY-R-1
Location: Willamette river to MS Young State Park Basin: Lower Willamette
T2S, R1E, Section: 24 Atlas map #: 4934, 5034 Reach Length: 1847'
LWI wetland codes: T'Y-01 Photos: 1719
Habitat sites: MA-H-1 Field Date(s): 4/23/02
Adjacent Land Use: open space Investigators: TB. LW
General Comments
Sznall, mostly forested basin within Mary S. Young Pazk.
Stream drops through a steep canyon, an associated
emergent wetland, and then inta tbe Willamette River.
Riparian Characteristics
Stream type/order: perennial, first order
Dom. soil: Xerochrepts and Haploxerolls, verv steep
Soil erosion potential: ❑ low [] medium � high
WQ limited? � yes � no Parameters:
Floodplain? � yes ❑ no Source: FEMA
Fish-bearing stream? 0 yes � no
Fish barriers: N/A
Road density: 1 crossing per 1847 linear feet
Large wood features: 18" sna�s, lar eg trees
Recruitment potential: ❑ low Q medium � high
Notes: sub-basin has minimal impervious surfaces
Vegetation (*dominant)
Trees 80% cover Shrubs
Douglas fu"` Big-leaf maple Red-osier dogwood*
Black cottonwood' Red alder Salmonberry*
Oregon ash* English holly Oregon grape
Western red cedaz Osoberry
Oregon white oak English laurel
Black hawthom Hazelnut
Ornamental cherry Pacific ninebazk
90% Native
Assessment Results
Rinarian Function Rating
Water Quali U Low
VJater Sources and Stora e ❑ Low
Fish Habitat ❑ Low
Wildlife Habitat ❑ Low
Rari / Inte i ❑ Low
Combined score: 60 .
Channel type: steep narrow valle�channel
Gradient:� low (<2%) ❑ mod (2-4%) � steep (8%)
Side slopes: ❑<10% ❑ 10-20% Q 20-50% �>50%
Active channei width: 3' depth: 1'
Channel width - valley width ratio: 1:1-1:1.5
Vegetated riparian width: >200'
Stream flow: 0 none � low 0 medium � high (rivers)
Channel shade: �<25% 0 25-50% �>50%
Bank/channel condition: natural and stable
Other water resources: ❑ ponds � wetlands Q springs
25% cover Herbs/Emer ents 100% cover
Western wahoo Sword fem* Long-leaved avens
Thimbleberry English ivy* Oxalis sp.
Himal. blackbem Stingin� nettle Spring beauty
Dewberry
Scot's broom
80% N
Dewey's s
Pacific w aterlea
Lady fem
Maidenh fem
Comments
Westem trillium
False Solomon seal
Impatiens
70% Native
Medium
Medium
Mediutn
Medium
Medium
Sign�cant? � Yes ❑ No Basis: combined score high water qualitv fish & wildlife habitat
Restoration/Enhancement Opportunities Mana�e invasive species• trail culverts could potentiall ��be
im�roved for fish and wildlife access.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Lower Willamette Riparian Code: WI-R-1
Location: City Limits (Hog Island) to Cedar Island (RM 22.2-23.5� Basin: Lower Willamette
T2S, R1E, Section: 13, 14, 24 Atlas map #: 4732-3, 4833-4, 4934 Reach Length: 7450'
LWI wetland codes: WI-O5, WI-06 Photos: 1591, 1719, 1904
Habitat sites: VJI-H-1 Field Date(s): 8/30/Ol, 5/2/02
Adjacent Land Use: residential, park / open space Investigators: TB, LW, AK
General Comments
Lowest reach of river narrowing to 300' and up to
100'depth with several islands; river terraces stepping west
into West Linn are developed with housing. North
trending streams and forested ridges separate terraces.
Riparian Characteristics
Stream type/order: perennial, high order river Channel type: low gradient lazge floodplain channel
Dom. soil type: Chehalis Silt Loam Gradient:� low (<2%) Q mod (2-4%) � mod steep (>4%)
Soil erosion potential: � low � medium Q high Side slopes: �<10% ❑ 10-20% � 20-50% 0>50%
WQ limited? � yes ❑ no Parameters:temp.bact.toxics Active channel width: 300-1000' depth: to 100'
Floodplain? � yes ❑ no Source: FEMA Channel width - valley width ratio: 1:1 to 1:1.5 .
Fish-bearing stream? � yes ❑ no Vegetated riparian width: 25to >200' from top of bank
Fish barriers: none noted Stream flow: ❑ none ❑ low � medium � high (rivers)
Road density: 1 crossing per 7450 linear feet Channel shade: �<25% ❑ 25-50% �>50%
Large wood features: some 18" snags to 40' Bank/channel condition: natural, some scour at streams
Recruitment potential: 0 low � medium � high Other water resources: Q ponds � wetlands � springs
Notes: reach includes side channels, alcoves, rock ledges (some off channel habitat�,potential amphibian breedin� in nonds
Vegetation (*dominant)
Trees 25% cover Shrubs 25% cover Herbs/Eme
Black cottonwood* (36") Oregon ash Salmonberry* ScoYs broom Reed canarygn
Pacific willow* Red-osier dogwood* Douglas spiraea Stinging nettle
Big-leaf maple Himal. b(ackberry* Japanese knotwood English ivy
Red alder Osoberry Pacific ninebazk Sword fem
Westem red cedar
Douglas fir
95% Native
Assessment Results
Riparian Function
Water Quality
Water Sources and ;
Fish Habitat
Wildlife Habitat
Sensitive Svecies
Red el
Scouler willow
Low
Low
Low
Low
Low
Medium
Medium
Medium
Medium
Medium
50% Narive
Comments
Combined score: I 47
SigniflCant? � Yes ❑ No Basis: state sensitive species, high fish habitat
75% cover
25% Native
Restoration/Enhancement Opportunities Dense native re-vegetation; add conifers such as western red
cedar to diversify habitat, add ever�reen cover, plant native bottomland hardwoods such as cottonwood ash, and
willow to restore the riparian corridor and help shade out invasives• remove and manage invasive species.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Clackamas Confluence
Location: Cedar Island to Willamette Falls (RM 23.5-26.7�
T2S, R1E, Section: 24, 25, 26
Atlas map #: 4934, 5034, 5134-36. 5236, 5334-36, 5434-35
LWI wetland codes: WI-Q4
Habitat sites: WI-H-1
Adjacent Land Use: residential, pazk / open space,
Riparian Code: WI-R-2
Basin: Lower Willamette
Reach Length: 16,035'
Photas: 1591. 17I9, 1904
Field Date(s): 4/4/02
Investigators: TB, LW, AK, EL
General Comments
A generally natural, wel�-vegetated riparian corridor borders this
central Willamette reach which, together with Goat Island, several
forested parks (Mary S. Young, Burnside, and Maddox) and the
Clackamas River Confluence, creates a wel�functioning habitat
complex. Nesting peregrine falcons and one of the large great blue
heron colonies along the Willamette River are found in this reach.
Riparian Characteristics
Stream type/order: perennial, high order river Channel type: low gradient lar e� floodplain channel
Dom. soil type: Newber� Fine Sandy Loam Gradient:� low (<2%) � mod (2-4%) � mod steep (>4%)
Soil erosion potential: � low Q medium � high Side slopes: ❑<10°/a ❑ 10-20% � 20-50% �>50°/a
WQ limited? � yes ❑ no Pazameters: toxics Active channel width: 300 dePth: shallow, at falls >100
Floodplain? � yes ❑ no Source: FEMA Channel width—valley width ratio: 1:1-1:1.5
Fish-bearing stream? � yes ❑ no (salmonids) Vegetated riparian width: 50 to >200' from top of bank
Fish barriers: Willamette Falls Stream flow: ❑ none ❑ Iow Q medium � high (rivers)
Road density: 1 crossing per 8018 linear feet Channel shade: �<id% ❑ 10-25% � 25-50°lo Q>50%
Lazge wood features: lar e snags, some LWD on banks Bank/channel condition: generallv natural and stable
Recruitment potential: � low [] medium � high Other water resources: � ponds � wetlands 0 springs
Notes: basalt ledQes; large black cottonwood and conifers; diverse channel micro-topoeranhv with side channels, alcoves
Vegetation (*dominant)
Trees 40% cover Shrubs
Black cottonwood* Oregon white oak Snowben
Pacific willow* Oregon ash Himal. bl
Westem red cedar
Pa cific dogwood Red elderberry
Westem hemlock Salmonberry
Osoberry
Vine maple
95% Native
Assessment Results
Riparian �nction
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitax
Sensitive Snecies
Combined score: I 60
Low
Low
Low
Low
Low
25% cover Herbs/Emer�
12ed-osier dogwood Sword fern*
y"' Poison oak Reed canarygras
Oregon grape (tall) Stinging netUe
Willow sp. Western trillium
ScoYs broom Pacific waterleal
Douglas spiraea English ivy
60% Native
Comments
Medium ❑ Hi h
Medium ❑ Hi h
Medium � Hi
Medium � Hi h
Medium n Hi�h Salmon, pere
75% cover
Poison hemlock
Yazrow
Teasel
Mullein
40% Narive
falcon
SignifiCant? � Yes ❑ No Basis: combined score�h�h fish & wildlife habitat state sensitive species
Restoration/Enhancement Opportunities Remove blackberry & other invasives, and ra�vegetate with
native bottomland hardwoods such as cottonwood, ash willow and conifers (e. .� cedar) forg_reater diversity.
West Linn Goal 5 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Unaer Willamette Riparian Code: WI-R-3
Location: Willamette Falls to Tualatin River (RM 26.7-28.5) Basin: Up�er Willamette
T2S, R1E, Sec:36;T3S, R1E, Sec:01, 02 Atlas map #: 5433-34, 5532-33, 5632 Reach Length: 9408'
LWI wetland codes: WI-01, WI-02, WI-03 Photos: 1591, 1719, 1904
Habitat sites: WI-H-2 Field Date(s): 8/30/01, 5/2/02
Adjacent Land Use: residential, park / open space, industrial Investigators: TB. LW, AK, EL
General Comments
Upper, wide reach of river with broad floodplain below Tualatin River
confluence; narrow, undifferentiated (straight) shoreline with links to
diverse wetland complex on lowland (floodplain) terrace.
Riparian Characteristics
Stream type/order: nerennial, high order river Channel type: low p,radient lar eg floodplain channel
Dom. soil type: Newberg Fine Sandv Loam Gradient:� low (<2%) ❑ mod (2-4%) � mod steep (>4%)
Soil erosion potential: � low Q medium 0 high Side slopes: �<10% ❑ 10-20% � 20-50% �>50%
WQ limited? � yes ❑ no Parameters:temn.bact,tox;cs Active channel width: �prox�1000' depth: 30-50'
Floodplain? � yes ❑ no Source: FEMA Channel width - valley width rario: l:1-1:2
Fish-bearing stream? � yes ❑ no Vegetated riparian width: 25 to 100' from top of bank
Fish barriers: Willamette Falls. Stream flow: ❑ none ❑ low 0 medium � high (rivers)
Road density: 1 crossing per 9408 linear feet Channel shade: �<25% Q 25-50% �>50%
Large wood features: some large sna�s, limited LWD Bank/channel condition: bank fill and armoring � places
Recruitment potential: ❑ low � medium � high Other water resources: � ponds � wetlands � springs
Notes: important confluence area with diverse wetland habitats
Vegetation (*dominant)
Trees 25% cover Shrubs
Black cottonwood* Pacific willow . Snowberry*
Oregon ash* Oregon white oak Red-osier dc
maple
fir
Black hawthom � Himal. blackberry*
95% Native
Oregon grape (tali)
Assessment Results
Riparian Function
Water Quality
Water Sources and
Fish Habitat
Wildlife Habitat
Combined score: I 57
Low
Low
Low
Low
Low
25% cover
* I Pacific ninebazk
50% Native
Medium
Medium
Medium
Medium
Medium
Reed cana rygrass*
Sword fem
Stinging nettle
English ivy
Douglas spiraea
Comments
h
�h salmon
75% cover
American speedwell
Rushes (soft, needle spike,
25% Native
Significant? � Yes ❑ No BaS1S: combined score, high flood mana�*ement: wildlife habitat, state sensitive soecies
Restoratiori/Enhancement Opportunities: Dense native re-ve�etation: plant native bottomland
hardwoods such as cottonwood, ash, and willow to restore the riparian corrida� and help shade out invasives;
remove and manage invasive s�ecies.
West Linn Goa15 Inventory
Riparian Corridor Summary Sheet
Riparian Site/Reach: Willamette Lowlands Riparian Code: WI-R-4
Location: Willamette Park to Bernert Creek Basin: Lower Willamette
T2S, R1E, Sec: 36; T3S, R1E, Sec: O1, 02 Atlas map #: 5433, 5532-33 Reach Length: 4481'
LWI wetland codes: WI-01, WI-02, WI-03 Photos: 1591, 1719, 1904
Habitat sites: WI-H-2 Field Date(s): 9/20/O1, 4/3-5/02
Adjacent Land Use: park, residential Investigators: TB, LW. AK, EL
General Comments
Broad Willamette floodplain area with a diverse mosaic of
emergent, scrut}shrub, and forested wetlands linked by
small east flowing drainages.
Riparian Characteristics
Stream type/order: nerennial, first order
Dom. soil type: Wapato Siltv Clav Loam
Soil erosion potential: � low 0 medium � high
WQ limited? Q yes � no Parameters:
Floodplain? � yes ❑ no Source: FEMA
Fish-bearing stream? Q yes ❑ no � potential
Fish barriers: culverts
Road density: 1 crossing per 22401inear feet
Large wood features: sna�,s to 24" common
Recruitment potential: Q low � medium ❑ high
Notes: largest wetland complex in Citv
Channel type: low Qradient lar eg floodplain channel
Gradient:� low (<2%) � mod (2-4%) 0 mod steep (>4%)
Side slopes: �<10% ❑ 10-20% � 20-50% Q>50%
Active channel width: <6' depth: 6-24"
Channel width - valley width ratio: varies, > 1:2
Vegetated riparian width: 0 to >200'
Stream flow: ❑ none � low � medium � high (rivers)
Channel shade: �<25% � 25-50% �>50%
Bank/channel condition: eroded where grazed
Other water resources: � ponds � wetlands � springs
Vegetation (*dominant)
Trees 45% cover Shrubs
Oregon ash* Black hawthom Red-osier
Red alder � � Osoberry
95% Native
Assessment Results
Ri arian Function Ratin
Water uali ❑ Low
Water Sources and Stora e ❑ Low
Fish Habitat ❑ Low
Wildlife Habitat ❑ Low
Sensitive Svecies �I Low
30% cover Herbs/Emerg
i* Douglas spiraea Reed canarygrass
• Sitka willow Meadow foxtail
Orchard grass
Common rush
60% Native
Comments
Medium ❑ Hi
Medium � Hi h
Medium ❑ Hi h
Medium � Hi
Medium ( High
80% cover
Small-fruited bulrush
Hellebore sp.
80% Native
Combined score: I 56
Significant? � Yes ❑ No BaSiS: combined score, high flood storage, wildlife habitat, state sensitive species
RestorationlEnhancement Opportunities Manage invasive exotics; restore vegetated buffers along riparian and
wetland areas.
Appendix F
Riparian Assessments
West Linn Goa15 Inventory
Riparian Functional Values Assessment — AR-R-1
Function
Water Quatity
Score:
14
high
Fiood Managemeut
Score:
10
medium
Fish EIabitar
Score:
12
high
Wildtife Habitat
10
medium
medium
Low (1 pt)
Riparian azea dominated by sparse
herbs or no vegetation
Average vegetated ripazian buffer
< 25'
Impervious surfaces > 25%
Average side slope < IO%, or
�arsely vegetated
Low soil erosion potential, or
Assessment Factors
Medium (2 ts) High (3 ts
Ripazian azea dominated by herbs Ripazian area dominated by dense
or s arse wood ve etation 3 wood ve etation
Average vegetated riparian buffer: Average vegetated riparian huffer
25' to 50' 3 > 50'
2 Impervious surfaces: 10% - 25% Imperyious surfaces < 10%
Average side siope: 10% - 25%, Average side slope >25%, and
moderatel to densel ve etated 3 d'ensel ve etated
Moderate soil erosion potential, , High soil erosion potential, and
moderately to densely vegetated 3 densely vegetated
Low floodplain functioning Moderate floodplain functioning
(VW:CW=1 or floods >5 yeazs) 2 (VW:CW>I.S, floods 2-5 years)
No stream-associated weUands, Some stream-associated wedands,
I floodplains tloodplains
<30%woody vegetation cover 2 30 - 70% woody vegetation
High degree of bank armoring Moderate degree of bank azmorin�
Located in lower 1/3 of basin � Located in middle 1!3 of basin
High channel alteration (>25% Moderate channel alteration (5-
attered 2 25% altered
Average channel shade < 25% Average channel shade 25 - 50%
Low LWD recruitment potential Medium LWD recruihnent
(<2% of trees aze >16" dbh) 2 otential (2-50% of trees are >16"
Barrier{s) preventing juvenile and Blockages under some flow
adult fish passage 2 conditions
Surveyed but not listed as a fish- Not surveyed by ODF W for fish
bearin b ODFW
� �, ' -� ���� � .� �� ��r � �� ; , �� �
��
.,..:c.�1� .:�.�:�5.��'^t=�����,-�.� : �.ES�1`., '�..'�r . .-�^:;;�;�r'�",'��_ '� . ,?�:::
Seasonal surface water Permanent surface water
2
Low habitat diversity 2 Modecate habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge
2
No contiguous patches 5 acres in Contiguous patches 5-10 acres in
size 2 size
Connectivity is low, isolated from Moderate connectivity to upland
upland habitats 2 habitats
No federal or state listed species Potential habitat for federal or
2 state listed s cies
1 No ONHP priority habitats Potential ONHP priority habitats
No locally rare species or habitats Potential locally rare species or
2 habitats resent
Low native cover (> 50% Medium native cover (10 - 50%
invasive/non-native species) 2 invasive/non-native species)
High human-caused disturbance 2 Moderate human disturbance
High floodplain functioning
(VW:CW>1.5, floods <2 yea
Multipie and/or lazge stream-
associated wetlands, floodpla
> 70% woody vegetation
� of bank armoring
upper 1!3 of basin
Low channel alteration (natur
semi-natural, <5% altered)
3 Average channel shade > 50%
High LWD reeruiUnent potent
(>50% of trees are >16" dbh}
No fish barriers (ali crossings
bridge or ford)
ODFW fish-bearing stream
3
or
by
Open water pools through
summer, or multiple water typ
High habitat diversity
High sanctuary or refuge
Contiguous patches > 10 acres
size
High wnnecdvity to upland
Listed federal or state species
present
O NHP priority habitats present*
Locally rare species or habitats
present
High native cover (< 10%
invasive/non-native spec
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — BA-R-1
Function
Wate —____—
Score:
11
medium
� � -��
Sub-Uifais ,� ¢� ,�:
Flood Management
Score:
7
low
Sub-�� t�3s-�t�
�
.F. -� . �,.;.
Fish Habitat
Score:
Wildlife Habitat
6
low
Low (1 t)
Riparian area dominated by sparse
herbs or no ve etation
Average vegetated riparian buffer
25'
Impervious surfaces > 25%
Average side slope < IO%, or
s arset ve etated
Low soil erosion potential, or
1 soazselv veeetated
Il
Low floodplain functioning
(VW:CW=1 or floods >5 yeazs)
No stream-associated wetlands,
floodplains
< 30% woody vegetation cover
High degree of bank azmoring
Located in lower 1/3 of basin
]
High channei atteration (>25%
altere
Average channel shade < 25%
Low LWD recruitment potential
<2% of trees are > 16" dbh
Barrier(s) preventing juvenite and
1 adult fish passage
Surveyed but not listed as a Ssh-
1 hrarino fiv [ITIRW
Seasonal surface water
1 Low habitat diversity
Low sanctuary or refuge
1
No contiguous patches 5 acres in
1 size
Connectivity is (ow, isolated &om
1 ualand habitats
Assessmeat Factors
Medium (2 pts)
Ripazian area dominated by herbs
or s arse woody vegetation
Average vegeiated riparian buffer:
2 25' to 50'
2 Impervious surfaces: 10% - 25%
Average side siope: 10%- 25%,
moderatel to densel ve etated
Moderate soil erosion potential,
moderately to densely vegetated
Moderate floodplain functioning
(VW:CW>1.5, floods 2-5 years)
Some stream-associated wetlands,
floodplains
2 30 - 70% woody vegetation
2 Moderate degree of bank armoring
Located in middle 1/3 ofbasm
Moderate channel alteration (5-
2 25% altered
Average channel shade 25 - 50%
Medium LWU recruitment
2 otential 2-50%oftreesaze>lf
BlockaQes under some 4ow
surveyed by ODFW for fish
Permanent surface water
2
Moderate habitat diversity
Moderate sanctuary or refuge
Contiguous patches 5-10 acres in
size
Moderate connectivity to upland
Rarity/Integrity
edium
No federal or state listed species
1 I�Io ONHP piiority habitats
No locally rare species or habitats
1
Low native cover (> 50%
invasive/non-native species)
High human-caused disturbance
Potential habitat for federal or st�
listed s ecies
Potential ONHP priority habitats
Potential locally rare species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
2 Moderate human disturbance
Riparian azea dominated by dense
3 wood ve etation
Average vegetated riparian buffer
50'
Itnpervious surfaces < 10%
Average side slope >25%, and
3 (IP.TICP.IV VP.OP.YSIYP.(I
vegetated
High floodplain functioning
(VW:CW>1.5, 800ds Q year,
Multiple ancUor large stream-
associated wetlands, floodpla'v
> 70% woody vegetation .
Low degree of bank azmoring
Located in upper 1/3 of basin
v channel alteration (natural or
a-natural, <5% altered)
:rage channel shade > 50%
h LWD recruitment potential
0% of trees are > 16" dbh)
fish bazriers (all crossings by
Ige or ford)
FW fish-beazmg stream
water pools through summa
�itiple water types
habitat diversity
sanctuary or refuge
guous patches > 10 acres in
connectivity to upland
Listed federal or state species
3 resent*
ONHP priority habitats present*
Locally raze species or habitats
resent*
High native cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goal 5 Inventory
Riparian Functional Values Assessment— BA-R-2
Function
W ate
Score:
13
high
Flood Mauagement I
Score:
10
medium
Fish Habitat
Score:
8 1
tow 1
1
�ub ta!f��w�`='�� �� ��3
Wildlife Habitat
Score:
9 �
medium
10
medium
ian area dominated by sparse
or no vegetation
�ge vegetated riparian buffer
rvious surfaces > 25%
age side slope < 10%, or
�ly vegetated
soil erosion potential, or
�w floodplain functioning
rW:CW=1 or floods >5 years)
o stream-associated wetlands,
�odplains
30% woody vegetatior� cover
igh degree of bank annoring
xated in lower 1!3 of basin
channel alteration (>25%
d)
age channel shade < 25%
LWD zecruitment potential
� of trees aze >16" dbh)
�r(s) preventing juvenile and
fish passage
;yed bui not listed as a Ssh-
�e bv ODFW
Assessment Factors
Medium 2 ts Hi h 3 ts
Riparian area dominated by herbs Riparian uea dominated by dense
or s arse wood ve etation 3 wood ve etation
Average vegetated ripazian buffer: Average vegetated riparian buffer
2 25' to 50' S0'
2 Impervious surfaces: 10% - 25% Impervious surFaces < 10%
Average side slope: 10% - 25%, Average side slope >25%, and
moderatel to densel ve etated 3 densel ve etated
Moderate soil erosion potential, High sod arosion potential, and
moderately to densely vegetated 3 densely vegetated
�� :�;�� �.p �.�.: � � � �'e�"�, �- � � h,����`�
, Moderate floodplain functioning High floodplain functioning
(VW:CW>1.5, floods 2-5 yeazs) (VW:CW>1.5, floods <2 years)
Some stream-associated wetlands, Muttiple and/or large stream-
2 floodplains associated wetlands, floodplains
2 30 - 70% woody vegetation > 70% woody vegetation
Moderate degree of bank armoring 3 Low degree ofbank azmoting
2 LocaLed in middle 113 of basin Located in upper 1/3 of basirt
� � ��-�� � �� � � �� ����� � s n � yp
� �'�,����`� s� � a� e �`. , .� �" ��°��.':'��,��� `�
Moderate channel alYeration (5- Low channel alteration (natural or
2 25% altered semi-natural, <5% altered
Average channel shade 25 - 50% 3 Average channei shade > 50%
Medium LWD recruitment High LWD recruitment potentiat
otentiat 2-50% oftrees aze >16" >50% of trees aze >16" dbh
Blockages under some flow No fish barriers (all crossings by
conditions bridge or ford)
Not surveyed by ODFW for Ssh ODFW fish-beazing stream
sonal surface water
2
v habitat diversity 2
v sanctuary or refuge
contiguous patches 5 acres in
2
mectivity is tow, isolated &om
md habitats 2
':��'��.a?'�",�*a 8 y
� �3 � �� ��'��` ��.!
t surface water
habitat diversity
sanctuary or refuge
�s patches 5-10 acres a
connectivity to upiand
rvo federai or state lusted species Yotent�az habnat ior 2euera� or st�
listed s ecies
1 No ONHP priority habitats Potenrial ONHP priority habitats
No locally raze species or habitats Potential locally rare species or
habitats resent
Low native cover (> 50% Medium native cover (10 - 50%
invasive/nan-native species) 2 invasive/non-native species)
1 High human-caused disturbance Moderate human disturbance
water pools through summer ,
llt� le water es
habitat diversity
sanctuary or refuge
guous patches > 10 acres in
connectivity to upland
Listed federal or state species
3 resenf
ONHP priority habitats present*
Locally raze species or habitats
3 rasent
High native cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goal 5 Inventory
Riparian Functional Values Assessment - BE-R-1
Function
Water Quatity
Score:
9
medium
Fiood Management
Score:
10
medium
Low (1 t)
ian area dominated by sparse
or no ve etation 2
age vegetated ripazian buffer
2
rvious surfaces > 25% 2
age side slope < 10%, or
�l ve etated 2
soil arosion potential, or
�
�w floodplain functioning
�W:CW=1 or floods >5 yeazsJ
o stream-associated wettands,
�odplains
30% woody vegetation cover
igh degree of bank azmoring
�cated in lower 1/3 of basin
High channel alteration (>25%
Fish Habitat 1 .altered
Score: Average channel shade < 25%
Low LWD recruitment potential
� 1 <2% of trees aze >16" dbh
Banier(s) preventing juvenile and
low adult fish passage
Surveyed but not listed as a fish-
1 6rarina hv (N1FW
Seasonal surface water
Wildlife Habitat
Score:
I
1
1
federal or state listed species
O NHP priority habitats
locally raze species or habitats
v native cover (> 50%
�sive/non-native species)
h human-caused disturbance
Permanent surface water
2
1 Low naonai arversiry Moderate habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge
I
No contiguous patches 5 acres in Contiguous patches 5-10 acres in
size 2 size
Connectiviry is low, isolated from Moderate connectivity to upland
1 unland habitats
Assessment Factors
Medium (2 pts)
Riparian azea dominated by herbs
or spazse woody vegetation
Average vegetafed riparian buffer:
25' to 50'
Impervious surfaces: 10%- 25%
Average side slope: 10% - 25%,
moderately to densely vegetated
Moderate soil erosion potential,
moderatelv to densely vegetated
Moderate floodplain functioning
2 (VLV:CW>1.5, floods 2- yeazs)
Some stream-associaYed wetlands,
2 floodplains
2 30 - 70% woody vegetation
2 Moderate degree of bank azmorin�
2 Located in middle 1/3 of basin
Moderate channel alteration (5-
25% altered
2 Average channel shade 25 - 50%
Medium LWD recruitment
otentia! 2-50% of trees are >16"
Blockages under some flow
2 conditions
Not surveyed by ODFW for fish
Potential habitat for federal or st�
listed species
Potential ONHP priority habitats
Potential locally raze species or
habitats present
Medium native cover (10 - 50%
invasive/non-native species)
Moderate human disturbance
Ripazian azea dominated by dense
woody vegetation
Average vegetafed riparian buffer
50'
Impervious surfaces < 10%
Average side slope >25%, and
densety vegetated
High sbil erosion potential, and
(VW:CW>1.5, 400ds <2 years)
Multiple and/or large stream-
associated wetlands, floodplains
> 70% woody vegetation
Low degree of bank armoring
Located in upper 1/3 of basin
�������` ..<��.. � �. ���
Low channel alteration (natural or
semi-natural, <5% altered)
Average channel shade > 50%
High LWD recruitment potcntiai
(>50% of trees aze >16" dbh)
No Ssh bazriers (all crossings by
bridge or ford)
ODFW fish-beazing stream
water pools tluough summi
dtiple water types
habitat diversity
sanctuary or refuge
guovs patches > 10 acres in
connectivity to upland
Listed federa! or state spacies
present
ONHP priority habitats present*
Locatly raze species or habitats
present
High native cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment— BO-R-1
Assessment Factors
Function Low 1 t) Medium (2 ts) Hi h 3 ts
Riparian azea dominated by spazse Riparian azea dominated by herbs Ripazian area dominated by dense
Water Quality herbs or no ve etation or s azse wood ve etation 3 wood ve etation
Average vegetated ripazian buffer Average vegetated riparian buffer: Average vegetated ripazian buffer
SCO�� < 25' 25' to 50' 3 > 50'
15 Impervious surfaces > 25% Impervious surfaces: 10% - 25% 3 Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25%, Average side slope >25%, and
high s azsely vegetated moderately to densely ve etated 3 densel ve etated
Low soil erosion potential, or Moderate soil erosion potential, High soil erosion potentia[, and
sparsely vegetated moderately to densely vegetated 3 densely vegetated
� � � � ��� � � �;� � �� � � �,� � � �-_ x
Sub to�als�,w,�,� � �� ��?� �. ��'����>� V ��� � ,�� ��r. .:x�, ����� ���'��,; ���� � ���� �..'y� �^� ; E,� ��. �����.���`
v v Low floodplain functioning Moderate floodplain functioning High floodplain funcYioning
Flood Management I
(VW:CW=1 or floods >5 yeazs) (VW:CW>1.5, floods 2-5 yeazs) (VW:CW>1.5, floods <2 yeazs)
No stream-associated wetlands, Some stream-associated wetlands, Multiple ar�d/or lazge stream-
Score: 1 floodplains floodplains associated weUands, floodplains
g < 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
low High degree of bank azmoring Moderate degree of bank armoring 3 Low degree of bank armoring
1 Located in lower 1/3 of basin Located in middle 1/3 of basin Located in upper 1/3 of basin
SU�� �,n� ��� ��.. ,.�"�rv,�'�, .,�`„���.:� .r ,,,�,. .�::�n�..�?'�`�"� - ..s�......-n„'�', ��'�.v"�. �:-x.,,���i�;� Yx�� .�� :.-.., , ,��ina. �� �*„4�-�wAa.eu,���..,..� ��,. �+t�,,::�.�� �
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration {natural or
Fish Habitat altered) 25% altered) 3 semi-natural, <5% altered)
Score: Average channel shade < 25% Average channel shade 25 - 50% 3 Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruitrneni High LWD recruitment potentiat
11 (<2"/0 of trees aze >i6" dbh) otential (2-50% of trees aze >16" 3(>50% of trees are >16" dbh)
Bazrier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
medium 1 adulf fish passage conditions bridge or ford}
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-bearing stream
1 bearin b ODFW
Sub'� � �� ���� � '� ��` � �� �. � r,� � ::� ��
� z �,�.a �a� ��� : _ '�, �� �: ��" .�.
Seasonal surface water Permanenf surface water Open water pools through
Wildlife Habitat 2 summer, or multi le water es
Score: Low habitat diversity 2 Moderate habitat diversity High habitat diversity
Low sanctuary or refuge Moderate sanctuary ot refuge High sanctuary or refuge
12 3
No contiguous patches 5 acres in Contiguous patches 5-10 acres ut Contiguous patches > 10 acres in
high size size 3 size
Connectivity is low, isolated from Moderate connectivity to upland High connectivity to upland
uptand habitats 2 habitats habitats
Sn��ot�t �-�` � � �� � s��y � �� �� � , � r
�t � R, r , �
�� �.,. , _. �,. r ,.,-.. �:.. � <�.. .,, m: .. .: s� ,.. �. �x.. _. �.
No federal or state listed species Potentia( habitat for federal or Listed federal or state species
Rarity/Integrity state listed s ecies 3 resent"
Score: 1 No ONHP priority habitats Potential ONHP priority habitats ONHP priority habitats present*
No locally rare species or habitats Potentiai locally rare species or Localty rare species or habitats
12 habitats resent 3 resent*
Low native cover (> 50% Medium native cover (10 - 50% High native cover (< 10%
high invasive/non-native species) 2 invasivelnon-native species} invasive/non-native species)
High human-caused disturbance Moderate human disturbance 3 Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — CA-R-1
Function
--------
Water Qaality
Score:
13
high
Management
il
medium
Assessment Factors
Low (1 t Medium 2 ts} Hi h(3 ts
Ripazian azea dominated by sparse Riparian area dominated by herbs Ripazian azea dominated by dense
herbs or no ve etation or s arse wood ve etation 3 woody ve etation
Average vegetated riparian buffer Average vegetated ripazian buffer: Average vegetated riparian buffer
< 25' 25' to 50' 3 > 50'
Impervious surfaces > 25°/a 2 Impervious surfaces: 10% - 25% Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25%, Average side slope >25%, and
s arsel ve etated 2 moderatel to densel ve etated densel ve etated
Low soil erosion potential, or Moderate soil erosion potential, High soil erosion potential, and
sparsely vegetated moderately to densely vegetated 3 densely vegetated
Low floodplain functioning Moderate floodplain functioning High floodplain functioning
1(VW:CW=1 or floods >5 yeazs) (VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods <2 years)
No stream-associated wetlands, Some stream-associated wetlands, Multiple and/or large stream-
floodplains 2 floodplains associated wedands, floodplains
< 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
High degree of bank annoring Moderate degree of bank armoring 3 Low degtee of bank armoring
Located in lower 1/3 of basin Located in middle 1/3 of basin 3 Located in upper 1/3 of basin
High channel atteration (>25%
Fish Habitat altered
Score: Average channel shade < 25%
Low LWD recruitment potential
10 (<2% of trees aze >16" dbh
Bazrier(s) preventing juvenile and
medium 1 adult fish ass e
Surveyed but not listed as a fish-
1 hearinv hv (11�FW
Wildlife Habitat
Score:
13
high
Score:
13
high
Moderate channel alteration (5- Low channel alteration (natural or
2 25% altered semi-natural, <5% altered
Average channel shade 25 - 50% 3 Average channel shade > 50%
Medium LWD recruitment High LWD recruitment potential
otential (2-50% of trees aze >16" 3 >50% of trees are >16" dbh)
Blockages under some flow No fish barriers (all crossings by
conditions brid e or ford
Not surveyed by ODFW for fish ODFW fish-beazing stream
t surface water
habiYat diversity
sanctuary or refuge
�s patches 5-10 acres in
connectivity to upland
Seasonal surface water
2
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
Connectivity is low, isolated from
upland habitats 2
iil,
No federal or state listed species Potentiai habitat for federal or
state listed s ecies
No ONHP priority habitats Potential ONHP priority habitat
No locally raze species or habitats Potential locally raze species or
habitats resent
Low native cover (> 50% Medium native cover {10 - 50%
2 invasive/non-native species)
2 Moderate human disturbance
Open water pools through
summer, or multi le water es
3 High habitat diversiry
High sanctuary or refuge
3
3 Contiguous patches > 10 acres in
High connectivity to upland
Listed federa( or state species
3 resent"
3 ONHP priority habitats present*
Locally rare species or habitats
3 resent*
High native cover {< 10%
invasive/non-native species)
Low human disturbance
Total Score 60
West Linn Goa15 Inventory
Riparian Functional Values Assessment — CS-
��_
Assessment Factors
Function I.ow (1 t) Medium (2 ts) Ai h(3 ts
Riparian azea dominated,by sparse Ripazian area dominated by herbs Ripazian azea dominated by dense
Water Quality herbs or no ve etation or s arse wood ve etation 3 wood ve etation
Average vegetated riparian buffer Average vegetated riparian buffer: Av.erage vegetated ripazian buffer
Score: � 25� 2 25' to 50' > 50'
13 Impervious surfaces > 25% 2 Impervious surfaces: 10% - 25% Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25%, Average side slope >25%, and
high s azsely vegetated moderatel to densel ve etated 3 densel ve etated
Low soil erosion potential, or Moderate soil erosion potential, High soil erosion potential, and
spazsely vegetated moderately to densely vegetated 3 densely vegetated
�12� � ��s � �� H �� � y�� �,r � � �� 4 �� �� �. �� �`w ..����� ., �>� � �, ., � � ., ��.. ; � ' `����
S�O��,ia„�* z� �"�': ,'a"�, �: . .,�a ,,.:-: '�",�;,_;,�� . . ,i:'�. , s. -.� - . ;.. �
,...,. ., .. . � .. .,�€+.�' , ,,.- ... . , . -,.., _ .E .-.,-z
Low floodplain functioning Moderate floodplain functioning High floodplain functioning
Flood Management �;CW=1 or floods >5 eazs 2 VW:CW>1.5, floods 2-5 eazs CW>1.5, floods �c2 eazs
� Y ) � Y ) M�� Y )
No stream-associated wetlands, Some stream-associated wetlands, Multiple and/or large stream-
Score: floodplains 2 floodplains associated wetlands, floodpiains
10 1< 30% woody vegetation cover 30 - 70% woody vegetation > 70% woody vegetation
medium High degree of bank azmoring Moderate degree of bank annoring 3 Low degree of bank armoring
Located in Iower I/3 of basin 2 Located in middle 1/3 of basin Located in upper 1/3 of basin
�� � �
� a y�i h � �r �`.�"� � r � " x:� r �"�„ y ,:,'. �i � ��:. �„a
, �
Su� t�lLll`J e�' .iK � �. . � �� � �' ��&� '� � � �,., � 3 $�
,�b r, t�,' � � �., �' ,.,��.. :�� c� , s�„ 5 �m'k�_..ic. 8'a � ;�d. .�� � ��.c'" . �>,
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natural or
Fish Ha6itat altered 2 25% altered) semi-natural, <5°/a altered)
Score: Average channel shade < 25% Average channel shade 25 - 50% 3 Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruihnent High LWD recnzitment potential
10 (Q% of trees aze >16" dbh) 2 otential (2-SO% of trees are >16" >50% of trees are > 16" dbh)
Barrier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
medium 1 adult fish passage conditions bridge or ford)
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-beazing stream
bearin b QDFW 2
Jli ��, . 3 � �� � � t� `�,,�` ,� % . � *�� � : � �� � � .� �,� � �� n �" � � � ;� ��, a
.
� � � .�v. ,,,�.s .k� ''� � .��.�
� � t� a. � � s '"�sf ,r, a�„'s� ..i _ .�`a szs .�,: � :o.. . ^$;. .r _. �z.$t
Seasonal surface water Permanent surface water Open water pools through
Wildlife Habitat 3 summer, or multi te water es
Score: Low habitat diversity 2 Moderate habitat diversity High habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge High sanctuary or refuge
9 2
No contiguous patches acres in Contiguous patches 5-10 acres in Contiguous patches >!0 acres in
medium 1 size size size
Connectiviry is low, isolated from Moderate connectivity to upland High connectiviry to upland
1 upland habitats habitats habitats
� ��� :.. . ' � .''2 . ". 'r _.��.. *�+ � �y_;�.
t ,.. , �; .,. , �.
,�„ . � �. '' ; �., ;
� ,.,.
, Y�n,.., s.� „ . , .-:" ..,. , , s, ^>.+ « -, m' " � r„� ... � . ., n ` �:
.. . . ... . � , .... .. _ . - ..... . , ..v..
No federal or state listed species Potential habitat forfederal or Listed federal or state species
Rarity/Integrity state listed s ecies 3 resent*
Score: 1 No ONHP priority habitats Potential ONHP priority habitats ONHP priority habitats present*
No locally raze species or habitats Potential locally raze species or Locaily rare species or habitats
8 1 habitats resent resent*
Low native cover (> 50% Medium native cover (10 - 50% High native cover (< 10%
!ow 1 invasive/non-native species) invasive/non-native species) invasive/non-native species)
High human-caused disturbance 2 Moderate human disturbance Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — FE-R-i
Score:
13
high
Function
Quality
1
F[ood Management
Score:
10
medium
Fish Habitat
Score:
14
high
Wildlife Habitat
Score:
13
high
Score:
12
high
Low (1 pt)
ian azea dominated by spazse
or no vegetation
age vegetated riparian buffer
rvious surfaces > 25%
�ge side slope < 10%, or
�� vegetated
soil erosion potential, or
�w floodplain functioning
/W:CW=1 or floods >5 yeazs)
o stream-associated wetiands,
>odplains
30% woody vegetation cover
igh degree of bank azmoring
xated in lower 1/3 of basin
FIigh channel alteration (>25%
altered)
Average channel shade <25%
Low LWD recruitment potential
(<2% oftrees aze >16" dbh)
Barrier(s) preventing juvenile and
adult fish passage
Surveyed but not listed as a fish-
beazine bv ODFW
Seasonal surface water
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
size
Connectivity is low, isolaYed from
unland habRats
No feQeral or state listed spe.cies
[�Io ONHP priority habitats
No locally rare species or habitats
Low native cover (> 50%
invasive/non-native species)
High human-caused disturbance
Assessment Factors
Medium (2 pts)
�rian azea dominated by herbs
parse woody vegetation
:rage vegetated ripazian buffer:
to 50'
ervious surfaces: 10% - 25°/a
:rage side slope: 10% - 25%,
3erately to densely vegetated
3erate soil erosion potential,
ieratelv to denselv vegetated
Moderate floodplain functioning
2 (V W:CW>1.5, floods 2-5 yeazs)
Some stream-associated wetlands,
2 floodplains
2 30 - 70% woody vegetation
ModeraYe degree of bank atmorin�
Located in middle 1/3 of basin
Ripazian azea dominated by dense
3 wood ve etation
Average vegetated riparian buffer
3 Sp�
3 Impervious surfaces < 10%
Average side slope >25%, and
3 densel ve etated
Hieh soil erosion notential. and
High floodplain functioning
(VW:CW>1.5, floods <2 yeaz;
Multiple and/or large stream-
associated wetlands, floodplau
> 70% woody vegetation
3 Low degree of bank armoring
Located in upper 1/3 of basin
Moderate channel alteration (5- Low channel alteration (natural or
25% altered 3 semi-natural, <5% altered
Average channel shade 25 - 50% 3 Average channel shade > 50%
Medium LWD recruitment High LWD recruitment potentia[
otential 2-50% of trees aze >l6" 3 >50°/a of trees aze >16" dbh
Blockages under some flow No Ssh batriers (all crossings by
2 conditions bridge or ford)
Not surveyed by ODFW for Ssh ODFW fish-beazing stream
3
Permanent surface water
2.
Moderate habitat diversity
Moderate sanctuary or refuge
Contiguous patches 5-10 acres in
size
Moderate connectivity to upland
2 habitats
Open water pools through
3 nign naonai mversny
High sanctuary or refuge
3
Contiguous patches > 10 acres in
3 size
High connecYivity to upland
habitats
Potentia( habitat for federal or st
listed s ecies
Potential ONHP priority habitats
Potential localty rare species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
Moderata human disturbance
Listed federa! or state species
3 resent
OI3I-IP priority habitats present*
Locally rare species or habitats
3 resent
High native cover (< 10%
invasive/non-native species)
3 Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment— FE-R-2
Function
Water Quality
Score:
15
high
Low (1 pt)
Ripazian azea dominated by spazse
herbs or no vegetation
Average vegetated riparian buffer
2S'
Impervious surfaces > 25%
Average side slope < 10%, or
spazsely ve�etated
Low soil erosion potential, or
Low floodplain functioning
Flood Management 1 (VW:CW=1 or floods >5 years)
No stream-associated wetlands,
Score: floodplains
11 < 30% woody vegetation cover
medium High degree af bank armoring
Located in lower 1/3 of basin
Higfi channel alteration (>25%
Fish Habitat altered
Score: Average channel shade <25°/a
Low LWD recruitment potential
8 <l% of trees are >16" dbh
Barrier(s) preventing juvenile and
low adult fish passage
Surveyed but not lisied as a fish-
Assessment Factors
Medium (2 ts) High 3 ts)
azian area dominated by herbs Riparian area dominaYed by dense
> azse wood ve etation 3 wood ve etation
�rage vegetated riparian buffer: Average vegetated riparian buffer
to 50' 3 50'
�ervious surfaces: 10% - 25% 3 Impervious surfaces < 10%
�rage side slope: 10% - 25%, Average side slope >25%, and
deratel to densel ve etated 3 densel ve etated
derate soil erosion potential, High soil erosion potential, and
derately to densely vegetated 3 densely vegeiaYed
Moderate floodplain functioning
(VW:CW>1.5, floods 2-5 years)
Some stream-associated wetiands,
2 800dplains
2 30 - 70% woody vegetation
Moderate degree of bank azmorin�
Located in middle 1!3 of basin
(VW:CW>1.5, floods <2 yeaz
Multiple and/or lazge stream-
associated wetlands, floodp2aL
> 70% woody vegetation
L degree of bank armoring
Locaied in upper 1!3 of basin
Moderate channel alteration (5-
25% altere
Average channel shade 25 - 50%
Medium LWD recruRment
tential 2-50% of trees are >16"
Blockages under some flow
2 cond'Rions
Not surveyed by ODFW for Ssh
Low channei altcration (natural or
semi-natural, <5% altered)
Avera channel shade > 50%
High L WD recruitment potential
(>50% of trees are >16" dbh)
No fish barriers (ali crossings hy
bridge or ford)
ODFW fish-beazing stream
3
Wildlife Aab3tat
Score:
13
high
Rarity/Integrity
Score:
11
medium
Seasona] surface water
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
size
Connectivity is low, isolated &om
unland habitats
No federal or state listed species
1 No ONHP priority habitats
No localiy raze species or habifal
Low native cover (> 50%
invasive/non-native species)
High human-caused disturbance
Permanent surface water
2 Moderate habitat diversity
Moderate sanctuary or refuge
Contiguous patcbes 5-10 acres m
size
Moderate connectivity to upland
2 habstats
Potential habitat for federal or st;
listed s ecies
Potential ONHP priority habitats
Potential locally raze species or
habitats resent
Medium native cover (10 - 50°/a
2 invasive/non-native species)
2 Moderate human dishubance
Open water pools t[�mugh summE
3 or mult' le water es
High habitai diversity
High sanctuary or refuge
3
Contiguous patches > 10 acres in
3 size
High connectivity to upland
habitats
Listed federal or state species
3 resent
ONHP priority habitats present*
Locally rare species or habitats
3 resent
High native cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment -- FR-R
Function Low (1 t
Ripazian azea dominated by sparse
Water Quality herbs or no ve etation
Average vegetated ripazian buffer
Score: 25�
15 Impervious surfaces > 25%
Average side slope < 10%, or
h�g� s azsel ve etated
Low soil erosion potential, or
Flood Management Low floodp[ain functioning
(VW:CW=1 or floods >5 yeazs;
No stream-associated wetlands,
Score: floodplains
12 < 30% woody vegetation cover
high High degree of bank armoring
1 Located in lower 1/3 of basin
Habitat
11
medium
High channel alteration (>25%
altered)
Average channe! shade < 25%
Low LWD recruitment potential
(<2% of trees are >16" dbh)
Banier(s) preventing juvenile an�
adult fish passage
Surveyed but not listed as a fish-
Assessment Factors
Medium (2 pts
�rian area dominated by herbs
arse wood ve etation 3
;rage vegetated riparian buffer:
to 50' 3
�ervious swfaces: 10% - 25% 3
;rage side slope: 10% - 25%,
leratel to densel ve etated 3
derate sod erosion potential,
ieratelv to denselv veeetated 3
tan azea domuiated by tlense
ly vegetation
�ge vegetated riparian bufler
rvious surfaces < 10%
�ge side slope >25%, and
;ly vegetated
sod erosion potential, and
Moderate floodplain funciioning High floodptain functioning
(VW:CW>1.5, floods 2-5 years) 3(VW:CW>1.5, floods C2 yeaz;
Some stream-associated wetlands, Multiple and/or lazge stream-
floodplains 3 associated wetlands, floodplaii
Z 30 - 70% woody vegetation > 70% woody vegetation
Moderate degree of bank armoring 3 Low degree of bank azmoring
Located in middle 1/3 ofbasin Located in upper 1/3 of basin
Moderate channel alteration (5-
2 25% altered
2 Average channel shade 25 - 50%
Medium LWD reccvitment
2 otential 2-50% oftrees are >16"
Blockages under some flow
2 conditions
Not surveyed by ODFW for fish
3
14
10
medium
Habitat
Seasonai surface water
Low habitat divetsity
Low sanctuary or refuge
No contiguous patches 5 acres in
size
ConnecYivity is low, isolated from
upland habitats 2
No federal or state listed species
2
i No ONHP priority habitats
No locally rare species or habitats
Low native cover (> 50%
invasive/non-native species) 2
High human-caused disturbance 2
Low channel alteration (natural or
semi-natural, <5% altered)
Average channel shade > 50°/a
High LWD recruihnent potential
(>50% of trees aze >16" dbh)
No fish barriers (all crossings by
bridge or ford)
ODFW fish-beazing stream
; surface water Open water pools through summa
3 or multi la water es
habitat diversity 3 High habitat diversity
sanctuary or refuge High sanctuary or refuge
3
�s patches 5-10 acres in Contiguous patches > 10 acres in
3 size
connectivity to upland High connectivity to upland
habitat for federal or s1
;cies
ONHP priority habitat
locally rare species or
�resent
native cover (10 - 50%
non-native species)
e human disturbance
1 federal or state species
nt
P priority habitats present*
�ly rare species or habitats
nt*
native cover (< 10%
ive/non-native species)
human disturbance
3
Totat Score 62
West Linn Goal 5 Inventory
Riparian Functional Values Assessment — FR-R-2
Assessment Factors
Function Low 1 t) Medium (2 ts
Ripazian area dominated by sparse Riparian azea dominated by herbs
Water Quality herbs or no ve etation or s arse wood ve etation 3
Average vegetated ripazian buffer Average vegetated riparian buffer:
Score: <25' 2 25'to50'
13 Impervious surfaces > 25% 2 Tmpervious surfaces: 10% - 25%
Average side slope < 10%, or Average side slope: 10% - 25%,
b�gh s arsel ve etated moderatel to densel ve etated 3
Low soit erosion potential, or Moderate soit erosion potential,
sparsely vegetated moderately to densely vegetated 3
ipazian area dominated by dense
oody vegetation
verage vegetated riparian buffer
50'
npervious surfaces < 10%
verage side slope >25%, and
Flood Management Low floodplain functioning Moderate floodplain functioning High floodplain functioning
(VW:CW=1 or floods >5 yeazs) 2(VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods <2 years)
No stream-associated wetiands, Some stream-associated wetlands, Multiple and/or lazge stream-
5core: floodplains 2 floodplains associated wetlands, floodplains
10 < 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
medium High degree of bank armoring Moderate degree of bank annoring 3 Low degree of banlc azmoring
1 Located in lower 1/3 of basin Located in middle 1/3 of basin Located in upper 1/3 of basin
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natural or
Fish Habitat 1 aitered 25% altered semi-natural, <5% attered
Score: Average channel shade < 25% Average channel shade 25 - 50% 3 Average channel shade > 50%
Low LWI� recruihnent potential Medium LWD recruihnent High LWD recruiUnent potantial
9 <2°/a of trees aze >16" dbh) 2 otential (2-50% of Vees are >16" >50% of trees are >16" dbh)
Barrier(s) preventing juvenile and Blockages under some flow No fish baniers (all crossings by
medium adult fish passage 2 conditions bridge or fotd)
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-beazing stream
1 bearin b ODFW
Seasona( surface water Permanent surface water Open water pools through
Wildlife Habatat 2 summer, or muiti le water es
Score: Low habitat diversity 2 Moderate habitat diversity High habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge High sanctuary or refuge
9 2
No contiguous patches 5 acres in Contiguous patches 5-10 acres in Contiguous patches > 10 acres in
medium size 2 size size
Connectivity is low, isolated from Moderate connectivity to uplazid High wnnectivity to upland
1 upland habitats habitats habitats
No federal or state listed species Potential habitat for federal or Listed federat or state species
Rarity/Integrity staie lisYed s ecies 3 resent*
Score: i No ONHP priority habitats Potential ONHP priority habitaYs ONHP priority habitats present*
No locally rare species or habitats Potential locally rare species or Locally raze species or habitats
10 habitats resent 3 resent*
Low native cover (> 50% Medium native cover (10 - 50% High native cover (< 10%
medium invasive/non-native species) 2 invasive/non-native species) invasive/non-native species)
1 High human-caused disturbance Moderate human disturbance Low human disturbance
Combined Score 51
West Linn Goal 5 Inventory
Riparian Functional'Vatues Assessment— GA-R-1
Function
Water Quality
Score:
11
medium
1
Low (I pt)
Ripazian azea dominated by sparse
herbs or no vegetation
Average vegetated ripazian buffer
25'
Impervious surfaces > 25%
Average side slope < 10%, or
sparsely vegetated
Low soil erosion potential, or
Assessment Factors
Medium (2 pts)
Ripazian area dominated by herbs
or sparse woody vegetation
Average vegetated ripazian buffer:
25' to 50'
Impervious surfaces: 10% - 25%
Average side slope: 10% - 25%,
moderately to densely vegetated
Moderate soil erosion potential,
moderatelv to denselv ve�etated
Flood Management
Score:
7
low
Fis6 Habitat
Score:
9
medium
WildLfe Habitat
Score:
6
low
Score:
5
low
Low floodplain functioning
1 (VW;CW=1 or floods >5 years;
No stream-associated wetlands,
1 floodplains
1< 30% woody vegetation cover
High degree of bank azmoring
Located in lower 1/3 of basin
High ehannel alteration (>25%
1 altered
Average channel shade < 25%
Low LWD recruitment potential
<2% of trees aze >16" dbh
Barrier(s} preventing juvenile and
1 adult fish passage
Surveyed but not listed as a fish-
Seasonal surface water
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
size
Connectiviry is low, isolated from
upland habitats
1
1
1
1
No federal or state listed species
1
1 No ONHP priority habitats
No locally raze species or habitats
1
Low native cover (> 50°/a
1 invasive/rton-native species)
1 High human-caused disturbance
�
�
Moderate floodplain functioning
(VW:CW>1.5, floods 2-5 years)
Some stream-associated wetlands,
floodplains
30 - 70% woody vegetation
Moderate degree of bank armorin�
Located in middle 1/3 of basin
:
�
Moderate channel alteration (5-
25% alteted
Average channel shade 25 - 50%
Medium LWD recruitment
2 otential 2-50°/a oftrees are >IE
Btockages under some flow
conditions
Not surveyed by ODFW for fish
2
Permanent surface water
2
Moderate habitat diversity
Moderate sanctuary or refuge
Contiguous patches 5-10 acres in
size
Moderate connectivity to upland
Potentia[ habitat for federal or st
listed species
Potential ONHP priority habitats
Potential locally raze species or
habitats present
Medium native cover (10 - 50%
invasive/non-native species)
Moderate human disturbance
Ripazian area dominated by dense
3 wood ve etation
Average vegetated riparian buffer
50'
Impervious surfaces < 10%
Average side slope >25%, and
3 densel ve etated
High soil erosion potential, and
igh floodplain functioning
R�V:CW>1.5, floods <2 year.
nitiple and/or lazge stream-
sociated wetlands, floodplaii
70% woody vegetation
�w degree of bank armoring
�cated in upper i/3 of basin
Low channel alteration (natural or
semi-natural, <5% altered)
Average channel shade > 50%
High LWD recruitment potentia]
(>50% of trees aze >16" dbh)
No fish baniers (ail crossings by
bridge or ford)
ODFW fish-beazing stream
Open water pools through summa
or multiple water types
High habitat diversity
High sanetuary or refuge
Contiguous patches > 10 acres in
size
High connectivity to upland
habitats
Listed federal or state species
present
ONHP priority habitats present'"
Locally raze species or habitats
preseirt
High native cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goal 5 Inventory
Riparian Functional Values Assessment — HE-R-1
Function
W ater Quality
13
Ripazian azea dominated by spazse
herbs or no ve etation
Average vegetated ripazian buffer
25'
Impervious surfaces > 25%
Average side slope < 10%, or
s arsel ve etated
Low soil erosion potential, or
1 soarselv veeetated
Assessment Factors
Medeum 2 ts) Hi h 3 ts
Riparian area dominated by herbs Riparian area dominated by dense
or s arse wood ve etation 3 wood ve etation
Average vegetated riparian buffer: Average vegatated riparian buffer
25'to 50' 3 50'
Impervious surfaces: 10% - 25% 3 Impervious surfaces < 10%
Average side slope: 10% - 25%, Average side slope >25%, and
moderatel to densel ve etated 3 densel ve etated
Moderate soil erosion potential, High soil erosion potential, and
moderately to densely vegetated densely vegetated
Low floodplain functioning
'lood Management 1(VW:CW=1 or floods >5 yeazs)
No stream-associated wetlands,
core: floodptains
0 < 30% woody vegetation cover
�edium High degree of bank armoring
a Located in lower 1/3 of basin
High channel alteration (>25%
Fish Habitat altered
Score: Average channel shade < 25%
Low LWD recruitment potential
12 Q,% of trees are >16" dbh
Barrier(s) preventing juvenile and
high adult fish passage
Surveyed but not listed as a Ssh-
1 hParino hv (111FW
Seasonal surface water
Habitat
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
size
Connectivity is low, isolated from
upland habitats
Moderate floodplain functioning High floodplain functioning
(VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods <2 yeazs)
Some stream-associated wetlands, Multiple and/or large stream-
2 floodplains associated weUands, 400dplains
30 - 70% woody vegetation 3> 70% woody vegetation
Moderate degree of bank armoring 3 Low degree of bank armoring
Located in middle 1/3 ofbasin Located in uppar 1/3 of basin
� ��_� ���� �� �'� �, �� w � F � � ;
� � ,. ,��s,. � ,� �� .,,x: ��.�H,, �� �
Moderate channel alteration �5- Low cha�mel atteration (natural or
25% altered 3 semi-natural, <5% altered
Average channel shade 25 - 50% 3 Average channel shade > 50%
Medium LWD recruitment High LWD recruitment potential
otential 2-50% of trees are >16" 3 >50% of trees aze >16" dbh
Blockages under some flow No fish barriers (all crossings by
2 conditions bridge or ford)
Not surveyed by ODFW for fish ODFW fish-bearing stream
Permanent surface water Open water pools through summer
1 or multi le water es
Moderate habitat diversity g High habitat diversity
Moderate sanctuary or refuge High sanctuary or refuge
3 •
Contiguous patches 5-10 acres in Contiguous patches > 10 acres in
size 3 size
Moderate connectivity to upland High connectivity to upland
hahitats 3 habitats
No federal or state listed species
Rarity/Integrity 2
Score: 1 No ONHP ptiority habitats
No locally rare species or habitats
11 2
Low native cover (> 50%
medium invasive/non-native species)
High human-caused disturbance
habitat for federal or stat Listed federal or state species
cies resent
ONHP priority habitats ONHP priority habitats present*
locally rare species or Locally rare species or habitats
�resent resent
native cover (10 - 50% High native cover (< 10%
iom-native species) 3 invasive/non-native species)
: human disturbance 3 Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — HE-R-2
Function
ater Quality
15
high
Management �
11
Fish Habitat
Score:
10
medium
Habitat
12
Low (1 pt)
Riparian area dominated by sparse
herbs or no vegetation
Average vegetated ripazian buffer
< 25'
Impervious surfaces > 25%
Average side stope < 10%, or
sparsely vegetated
Low soil erosion potential, or
sparsely vegetated
Assessment Factors
Medium (2 ts
Riparian area dominated by herbs
or s arse wood ve etation 3
Average vegetated riparian buffer:
25' to 50' 3
Impervious surfaces: 10%- 25% 3
Average side slope: 10% - 25%,
moderatel to densel ve etated 3
Moderate soil erosion potential,
moderatelv to denselv veQetated 3
1(VW:CW=1 or floods >5 years) (VW:CW>].5, floods 2-5 years)
No stream-associated wetlands, Some stream-associated wetlands,
floodpiains 2 floodplains
< 30% woody vegetation cover 2 30 - 70% woody vegetation
High degree of bank azmoring Moderate degree of bank armoring 3
Located in lower I/3 of basin Located in middle 1/3 of basin 3
High channel alteration (>25% Moderate channeI alteration (5-
altered) 25% altered 3
Average channel shade < 25% Average channel shade 25 - 50% 3
Low LWD recruitment potential Medium LWD recruitment
(Q% of trees aze >16" dbh 2 otential (2-50% of trees are >16"
attier s preven mg�uvens e an Blockages under some flow
1 adult fish passage conditions
Surveyed but not listed as a fish- Not surveyed by ODFW for fish
1 bearin by ODFW
Seasonal surface water Permanent surface water
2
Low quantity and variety of food Moderate quantity and variety of
sources 2 food sources
Low cover values (structural Moderate cover values (structural
diversi , vazie and seasonali 2 diversi , vazie and seasonali
Habitat size < 5 acres Habitat size 5- 10 acres 3
Low connectivity along conidor, Moderate connectivity along
area
3ge vegetated riparian buffer
rvious surfaces < 10%
age side slope >25%, and
ly vegetated
soil erosion potential, and
ly vegetated
IW:CW>1.5, floods <2. years)
[ultiple and/or large stream-
sociated wetlands, floodplains
70% woody vegetation
�w d egree of bank azmoring
xated in upper 1/3 of basin
channe► alterauon (natural or
natural, <5% altered)
age channel shade > 50%
LWD recruitment potential
% of trees aze > 16" dbh)
sh barriers (all crossings by
e or ford)
W fish-beazin¢ stream
water pools through
ier, or multiple water types
quantity and vaziety of food
�s
cover values (structural
�ity, vaziety and seasonality)
a t size > 10 acres
connectivity atong corridor
isolated from uplands corridor and to uplands 3 and to uplands
ensi ►ve pec►es, No federa[ or state listed species Potential habitat for federal or Listed federal or state species
Ecological Integrity 2 state listed s ecies resent*
Score: 1 No ONHP priority habitats Potential ONHP priority habitats ONHP priority habitats preset
No locally raze species or habitats Pofential locally rare species or Locally raze species or habita
10 2 habitats resent resent*
Low native cover (> 50% Medium native cover (10 -. 50% High native cover (< 10%
medium invasive/non-native species) 2 invasive/non-native species) invasive/non-na6ve species)
High human-caused disturbance Moderate human disturbance 3 Low human disturbance
�
r
Combined Score 58
West Linn Goa15 Inventory
Riparian Functional Values Assessment - MA-R-1
Assessment Factors
Function Low (1 t) Medium (2 ts)
Riparian azea dominated by sparse Riparian area dominated by herbs
Water Quatity herbs or no ve etation or s arse wood ve etation 3
Average vegetated ripazian buffer Average vegetated riparian buffer:
Score: � 25' 25' to 50' 3
15 Impervious surfaces > 25°/a Impervious surfaces: 10% - 25% 3
Average side slope < 10%, or Average side slope: 10% - 25%,
��gh s arsely ve etated moderatel to densel ve etated 3
Low soil erosion potential, or Moderate soil erosion potential,
soarselv veeetated moderatetv to denselv veeetated �3
Low floodplain functioning Moderate floodplain functioning
F1ood Management 1 �r;CW=1 or floods >5 eazs
( y ) (VW:CW>1.5, floods 2-5 years)
No stream-associated wettands, Some stream-associated wetlands,
Score: 1 floodplains floodplains
8 < 30% woody vegetation cover 2 30 - 70% woody vegetation
low High degree of bank azmoring Moderate degree of bank armoring 3
1 Located ia lower 1/3 of basin Located in middle 1/3 of basin
�� � � � � �� � �� � : �
�Ut)%tO�d�S°����`��� ��� � '�. � � , �'; ._� � �',�.a� e.s�� ` E � � � �
s � {��„ � � �.�
High channel alteration (>25% Moderate channel alteration (5-
Fish Habitat altered 25% altered) 3
Score: Average channel shade < 25% Average channel shade 25 - 50% 3
Low LWD recruitment potential Medium LWD recruitment
11 (<2,% of trees aze >16" dbh otential (2-50% of trees are >16" 3
Barrier(s) preventing juvenile and Blockages under some flow
medium 1 adult fish passage conditions
Surveyed but not listed as a fish- Not surveyed by ODFW for fish
1 hearino hv 11T�FW
Aabitat
Score:
13
high
Rarity/Integrity
Score:
11
medium
water
�v sanctuary or refuge
contiguous patohes 5 acres in
mectivity is low, isolated fro�
and habitats
. , �—
r�
�W�, s�,k �.
federal or state listed species
ONHP priority habita�s
locally raze species or habitat
H native cover (> 50%
asive/non-native species)
;h human-caused disturbance
ian azea dominated by dense
y vegetation
age vegetated riparian buffer
rvious surfaces < 10%
ige side slope >25%, and
ly vegetated
soil erosion potential, and
(VW:CW>1.5, floods <2 yeazs)
Multiple and/or large stream-
associated wetlands, floodplains
> 70% woody vegetation
Gow degree of bank armoring
Located in upper 1/3 of basin
� � � „ � �N,�
�`" ��_, , � �r�.`��,�
Low channel alteration (natural or
semi-natural, <5% altered)
Average channel shade > 50%
High LWD recroitment potential
(>50% of trees aze >16" dbh)
No fish barriers (a11 crossings by
bridge or ford)
ODFW fish-bearing stream
Permanent surface water Open water pools through
2 summer, or multi le water es
Moderate habitat diversity 3 High habitat diversity
Moderate sanctuary or refuge High sanctuary or refuge
3
Contiguous patches 5-10 acres in Contiguous patches > 10 acres in
size 3 size
Moderate connectivity to upland High connectivity to upland
2 habitats habitats
Potential habitat for federal or
state listed s ecies
Potential ONHP priority habitats
Potential locally rare species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
2 Moderate human disturbance
Listed federal or state species
3 resent*
ONHP priority habitats present*
Locally raze species or habitats
3 resent'
High narive cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — MA-R-2
Function
Water Quality
Score:
13
high
�`�
Flood Managemenf
Score:
10
medium
E� ( �
I�I�r.�7,� �V�PI��''��
Fish Habitat
Score:
10
medium
`
Wildlife Habitat
Assessment Factors
Low (1 t) Medium (2 ts
Ripazian area dominated by spazse Ripazian area dominated by herbs
herbs or no ve etation or s azse wood ve etation 3
Average vegetated riparian buffer Average vegetated riparian buffer:
< 25' 2 25' to 50'
Impervious surfaces > 25% 2 Impetvious snrfaces: 10% - 25%
Average side slope < 10%, or Average side slope: 10% - 25%,
spazsel ve etated moderatel to densel ve etated 3
Low soil erosion potential, or Moderate soil erosion potential,
spazsely vegetated moderately to densely vegetated 3
Low floodplain functioning Moderate fIoodplain functioning
1(VW:CW=1 or floods >5 yeazs) (VW:CW>1.5, floods 2-5 years)
No stream-associated wetlands, Some stream-associated wetlands,
1 floodplains floodplains
< 30% woody vegetation cover 2 30 - 70% woody vegetation
High degree of bank azmoring Moderate degree of bank armoring 3
Located in lower 1/3 of basin Located in middle 1/3 of basin 3
High channel alteration (>25% Moderate channel alteration (5-
altered 25% altered 3
Average channel shade <25% Average channel shade 25 - 50% 3
Low LWD recruihnent potential Meditun L WD recruihnenT
(<2% of trees aze >16" dbh 2 otential 2-50% of trees aze >i6"
Bartier(s) preventing juvenile and Blockages under some flow
1 adult fish ass e conditions
Not listed as fish-bearing by Not surveyed by ODF W for fish
1 ODFW
3easonal surface water Permanent surface water
2
Low quantity and vaziety of food Moderate quantity and vaziety of
sources 2 food sources
Low cover values (structural Moderate cover values (structural
diversi , vazie and seasonali 2 diversity, vazie and seasonali
Habitat size < 5 acras 2 Habitat size 5- IO acres
Low connectivity along corridor, Moderate connectivity along
1 isolated from uplands corridor and to uplands
No federal or state lisfed species Potentia] habitat for federal or
1 state listed s ecies
1 No ONHP priority habitats Potential ONHP priority habitats
No locally raze species or habitats Potential locally rare species or
1 habitats resenY
Low native cover (> 50% Medium native cover (10 - 50%
invasive/non-native species) 2 invasive/non-native species)
High human-caused disturbance 2 Moderate human disturbance
ipazian azea dominatea ey aense
oody vegetation
verage vegetated ripazian buffer
50'
npervious swfaces < 10%
verage side slope >25%, and
;nsely vegetated
igh soil erosion potential, and
;nsely vegetated
° �` ' ��'� d '�
igh floodptain functioning
/W:CW>1.5, floods <2 years)
[ultiple and/or lazge stream-
sociated weUands, floodplains
70% woody vegetation
ow degree of bank armoring
ocated in upper 1/3 of basin
r jli;u
��� �I�� �'18
ow channel alteration (natural or
mi-natural, <5°/a altered)
verage channel shade > SO%
igh LWD recruitment potential
�50% of trees are >16" dbh)
o fish barriers (all crossings by
idge or ford)
DFW Fsh-beazing siream
water pools through
er, or multinle water
sanctuary or
s >10 acres
to upland
Listed federal or state species
present
ONHP priority habitats present�'
Locally raze species or habitats
present
High native cover(< 10%
invasive/non-native species)
Low human disturbance
Combined Score 49
West Linn Goal 5 Inventory
Riparian Functional Values Assessment — MC-R-1 �`
�
Assessment Factors
Function Low 1 t) Medium (2 ts) Hi h(3 ts)
Riparian area dominated by sparse Riparian area dominated by herbs Riparian area dominated by dense
Water Quality herbs or no ve etation or s azse wood ve etation 3 wood ve etation
Average vegetated riparian buffer Average vegetated riparian buffer: Average vegetated ripazian buffer
Score: < 2g' 2 25' to 50' > 50'
10 Impervious surfaces > 25% 2 Impervious surfaces: 10% - 25% Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25%, Average side slope >25%, and
medium s azsel ve etated 2 moderatel to densel ve etated densel ve etated
Low soil erosion potential, or Moderate soil erosion potential, High soIl erosion potential, and
1 sparsely vegetated moderately to densely vegetated densely vegetated
Su�i��ptals� ��, � �v� � ��` ,;��'����' ��;,:. z �� �� �� , �� �. ���. �s�� ��� �.
Low floodplain functioning Moderate floodplain functioning High floodplain functioning
F[ood Management
1(VW:CW-1 or floods >5 years) (VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods Q, yeazs)
No stream-associated wedands, Some stream-associaYed wetlands, Mu]tiple and/or large stream-
Score: 1 floodplains floodplains associated wetlands, floodplains
8 < 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
low High degree of bank annoring Moderate degree of bank armoring 3 Low degree of bank armoring
1 Located in lower 1/3 of basin Located in middle 1/3 of basin LocaYed in upper 1/3 of basin
n � - �k
�Lt���f�$ �. ���;,��-� '�s� � .r t�I"�� �' a�- ���„�w, � � ��o-�� £��� � f
,
- �- "
« . .., �, ;
a
High�channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natural or
Fish Habitat altered 2 25% altered semi-natural, <5% altered)
Score: Average channel shade < 25% Average channel shade 25 - 50% 3 Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruihnent High LWD recruitment potential
9 (Q% of trees are >16" dbh) Z otential (2-50% of trees are >16" >50% of trees aze >26" dbh)
Barrier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
medium 1 adutt fish passage conditions bridge or ford)
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-beazing stream
1 beazin b ODFW
S�� � Y � %S � aYF bY � � _ . ..
S ✓� � � -sG
..� �' t �✓.` � p" 1 ✓w�
,.�, '.�. Y;E..y r''�_ ..&ffi
P Seasonal surface water Permanent surface water Open water pools through
Wildlife Habitat 2 summer, or multi le water es
Score: i Low habitat diversity Moderate habitat diversity High habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge High sanctuary or refuge
9 Z
No contiguous patches 5 acres in Contiguous patches 5-10 acres in Contiguous patches > 10 acres in
medium size 2 size size
Connectivity is low, isolated from Moderate connectivity to upland High connectivity to upland
upland habitats 2 habitats ' habitats
��1�� ,_ ... . _
Q,�ta1, ,5,� � ;,< � � -;
f.
No federal or state listed species Potential habitat for federal or Listed federal or state species
Rarity/Integrity state listad s cies 3 resent*
Score: 1 No ONHP priority habitats Potential ONHP priority habitats ONHP priority habitats present*
No locally rare species or habitats Potential locally raze species or Locally rate species or habitats
11 habitats resent 3 resent*
Low native cover (> 50% Medium native cover (10 - 50% High native cover (< 10%
medium invasive/non-native species) 2 invasive%non-native species) invasive/non-native species)
High human-caused disturbance 2 Moderate human disturbance Low human disturbance
West Linn Goal 5 Inventory
Riparian Functional Values Assessment — MX-R-1
Futtction Low (1 t)
Riparian area dominated by spazse
Water Quality herbs or no ve etatian
Average vegetated riparian buffer
Score: 25�
15 Impervious surfaces > 25%
Average side slope < 10%, or
high s azsel ve etated
Low soil erosion potential, or
Low floodplain funcdoning
Maaagement 1 ��;CW=1 or floods >5 years)
No stream-associated wetlands,
floodplains
< 30% woody vegetation cover
m High degree of bank aztnoring
I Located in lower 1/3 of basin
High channet alteration (>25%
Fish Habitat altered
Score: Average channei shade < 25%
Low LWD recruittnent potential
11 <2,% of trees are > 16" dbh
Barrier(s) preventing juvenile and
medium 1 adult fish passage
Surveyed but not listed as a fish-
Z hrarina hv (lT1FW
13
10
medium
Seasonal surface water
Habitat
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
size
Connectivity is low, isolated fron
upland habitats
federal or state listed species
ONH prioriry habitats
Iocally raze species or habital
�v native cover (> 50%
�sive/non-native species)
h human-caused disturbance
Assessment Factors
Medium 2 ts) Hi h 3 ts)
azian area dominated by herbs Ripazian area dominated by dense
� azse wood ve etation 3 wood ve etation
�rage vegetated riparian buffer: Average vegetated ripazian buffer
to 50' 3 50'
�ervious surfaces: 10% - 25% 3 Impervious surfaces < 10%
�rage side slope: 10% - 25%, Average side slope >25°/a, and
deratel to densel ve etated 3 densel ve etaied
derate soil erosion potential, High soil erosion potential, and
deratelv to denselv veQetated 3 denselv veQetated
Moderate floodplain functioning
(VW:CW>1.5, floods 2- yeazs)
Some stream-associated wetlands,
2 floodplains
2 30 - 70% woody vegetation
Moderate degree of bank annorin�
Located in middle 1/3 of basin
igh floodplain functioning
/W:CW>1.5, floods <2 year
iultiple and/or large stream-
sociated wetlands, floodplai
70% woody vegetation
�w degree of bank azmoring
�cated in upper 1/3 of basin
Moderate channel alteration (5-
25% altered)
Average channel shade 25 - 50%
Medium LWD recruitment
potential (2-50% of trees aze >1E
Blockages under some flow
conditions
Not surveyed by ODFW for fish
Permanent surface water
2
2 Moderate habitat diversity
Moderate sanctuary or tefuge
Contiguous patches 5-10 acres in
size
Moderate connectivity to upland
habitats
Potential habitat for federal or s
2 listed s ecies
Potentiat ONHP priority habitat
Potential locaily rare species or
2 habitats resent
Medium native cover (10 - 50°/
2 invasive/non-native species)
Moderate human disturbance
channel alteration (natural or
3 semi-natural <5% altered
3 Average channel shade > 50%
High LWD recruitment potential
3 >50% oftrees aze >16" dbh
No 5sh battiers (all crossings by
bridge or ford)
ODFW fish-bearing stream
Open water pools through summer
or multi le water tyues
High habitat diversity
High sanctuary or refuge
3
Contiguous patches > 10 acres in
3 size
High connectivity to upland
3 habitats
Listed federal or state species
resent
ONHP priority habitats present
Locally rare species or habitats
resent
High native cover (< 10%
invasive/non-native species)
3 Low human disturbance
West Linn Goal 5 Inventory
Riparian Functional Values Assessment — RN-R-1
Function
Water Quality
Score:
I4
6igh
1
Ftood Management
1
Score: 1
7 1
low
Fish Habitat
Score:
10
medium
1
Score:
6
low
Score:
6
low
Assessment Factors
Low (1 t Medium (2 ts)
ipazian azea dominated by spazsa Riparian area dominated by herbs
�rbs or no ve etation or s arse wood ve etation 3
verage vegetated riparian buffer Average vegetated riparian buffer:
i' 2 25' to 50'
ipervious surfaces > 25% 2 Impervious surfaces: 10% - 25% 3
verage side slope < 10%, or Average side slope: 10% - 25%,
�arsel ve etated moderatel to densel ve etated 3
>w soil erosion potential, or Moderate soil erosion potential,
�azsely vegetated moderately to densely vegetated
�w floodplain funetioning Moderate Qoodplain functioning
rW:CW=1 or floods >5 yeacs) (VW:CW>I.S, floods 2-5 yeazs)
o sheam-associated wetlands, Some stream-associated wetlands,
�odplains (wetlands) floodplains
30% woody vegetation cover 30 - 70% woody vegetation
igh degree of bank armoring 2 Moderate degree of bank armoring
�cated in lower 1/3 of basin 2 Located in middle 1/3 ofbasin
igh channel akeration (>25% Moderate channel alteration (5-
tered 2 25% altered
verage channel shade < 25% Average channel shade 25 - 50% 3
�w LWD rectuitment potential Medium LWD recruitment
2% oftrees aze >16" dbh 2 otential 2-50% oftrees are >16"
arcier(s) preventing juvenile and Blockages under some flow
lult fish ass e 2 conditions
irveyed but not listed as a fish- Not surveyed by ODFW for fish
Seasonal surface waYer
Habitat
Low quantity and vaziety offood
1 sources
Low cover values (structural
1 divers' , varie and seasonal'
1 Habitat size < 5 acres
Low connectivity along corridor,
1 isolated &om uplands
No federal or state listed species
�tegrity i
1 No ONHP priority habitats
No locally raze species or habitats
1
Low native cover (> 50%
invasive/non-native species)
1 High human-caused disturbance
Permanent surface water
2
Moderaze quantity and vaziety of
food sources
Moderate cover values (structural
diversi , varie and seasonal'
Habitat size 5- 10 acres
Moderate connectivity along
corridor and to uplands
Potential habitat for federal or st�
listed s ecies
Potential ONHP priority habitats
Potential looally raze species or
habitats resent
Medium native cover (t0 - 50%
2 invasive/non-native species)
Moderate human disturbance
ian azea dominated by dense
ly vegetaYion
age vegetated riparian buffer
rvious surfaces < 10%
age side slope >25%, and
;ly vegetated
soil erosion potential, and
(VW:CW>1.5, floods <2 years)
Multiple and/or lazge stream-
associated wetlands, floodplains
> 70% woody vegetation
Low degree of bank annoring
Located in upper 1/3 of basin
; �` .
Low channel alteration (natural or
semi-natural, <5% altered)
Average channel shade > 50%
High LWD recruitment potential
(>50% of trees are >16" dbh)
No fish battiers (all crossings by
bridge or ford)
ODFW fish-bearing stream
Open water pools through summe
or multiple water types
High quantity and vaziety of food
sources
High cover values (structural
diversity, variety and seasonality)
Habitat size > 10 acres
High connectiviry along conidor
and to unlands
Listed federal or state species
present*
ONHP priority habitats present*
Locally raze species or habitats
present*
High native cover (< 10%
invasive/non-native species)
Low human disturbance
Combined Score 43
West Linn Goal 5 Inventory
Riparian Functional Values Assessment — RN-R-2
ater Quatity
15
Low (1 pt)
?arian azea dominated by spazse
rbs or no vegetation
�erage vegetated ripazian buffer
�pervious surfaces > 25°/a
�erage side slope < 10%, or
irsely vegetated
w soil erosion potential, or
Ftood Management Low floodplain functioning
1 (VW:CW=1 or floods >5 years;
No stream-associated wetlands,
Score: 1 floodplains (wetiands)
10 < 30% woody vegetation cover
medium High degree of bank azmoring
Located in lower 1/3 of basin
Fish Habitat
10
10
low
High channel alteration (>25%
altered
Average channel shade < 25%
Low LWD recruitment potentia!
<2%oftrees aze>16" dbh
Barrier(s) preventing juvenile and
1 � adult Ssh ass e
Surveyed but not listed as a fish-
1 hearmu hv C)I�FW
Seasonal surface water
Habitat
Low quantity and vaziety of food
sources
Low cover vatues (structural
divers' , varie and seasonal'
Habitat size < 5 acres
Low connectivity along corridor,
isolated from uplands
No federal or state listed species
1
1 No ONHP priority habitats
No locally raze species or habitats
1
Low native cover (> 50%
invasive/tton-native species)
High human-caused disturbance
Assessment Factors
Medium (2 pts)
Ripazian area dominated by herbs
or sparse woody vegetation
Average vegetated riparian buffer
25' to 50'
Impervious surfaces: 10%- 25%
Average side slope: 10% - 25%,
moderately to dense(y vegetated
Moderate soil erosion potential,
moderately to densely vegetated
Ripazian area dominated by dense
3 wood ve etation
Average vegetated ripazian buffer
3 gp�
3 Impervious surfaces < 10%
Average side slope >25%, and
3 densel ve etated
High soil erosion potential, and
3 denselv veeetated �
Moderate floodplain functioning High floodplain functioning
(VW:CW>1.5, floods 2-5 years) ('VW:CW>1.5, floods <2 year
Some stream-associated wetlands, Multiple and/or lazge stream-
floodplains associated wetlands, floodplai
30 - 70% woody vegetation > 70% woody vegetation
Moderate degree of bank annoring 3 Low degree of bank armoring
Located in middle 1/3 of basin 3 Located in upper 1/3 of basin
Moderate channe] alteration (5-
25% altered 3
Average channel shade 25 - 50% 3
Medium LWD recruitment
2 otential 2-50% of trees aze >16"
Blockages under some flow
conditions
Not surveyed by ODFW for fish
Permanent surface water
2
Moderate quantity and vaziety of
2 food sources
Moderate cover vatues (structural
2 divers' , varie and seasonal'
2 Habitat size 5- 10 acres
Moderate connectivity along
2 corridor and to uplands
Potential habitat for federat or st�
listed s ecies
Potential ONHP priority habitats
Potential locally rare species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
Moderate human distwbance
3
v channel alteration jnatwal or
u-natural, <5% altered)
;rage channel shade > 50%
h LWD recruitment potentiai
0% of trees aze >16" dbh)
fish barriers (all crossings by
Ige or ford)
FW fish-beazing stream
water pools through summ
iltiple water types
habitat diversity
sanctuary ofrefuge
guous patches > 10 acresin
connectivity to upland
d federal or state species
��
P priority habitats present*
lly rare species or habitats
nt*
native cover (< 10%
ive/non-native species)
human disturbance
Combined Score . 53
West Linn Goa15 Inventory
Riparian Functional Values Assessment — RO-R-i ;,,,�
��
Assessment Factors
Function Low (1 t) Medium 2 ts) Hi h 3 ts)
Riparian azea dominated by sparse Riparian area dominated by herbs Ripazian area dominated by dense
Water Quality herbs or no ve etation or arse wood ve etation 3 wood ve etation
Average vegetated riparian buffer Average vegetated riparian buffer: Average vegetated riparian buffer
Score: � 25' 25' to 50' 3 > 50'
15 Impervious surfaces > 25% Imperviovs surfaces: 10°/a - 25% 3 Impervious surfaces < 10%
Average side slope < 10°/a, or Average side slope: 10% - 25%, Average side slope >25°/a, and
high s azsel ve etated moderatel to densel ve etated 3 densel ve etated
Low soil erosion potential, or Moderate soil erosion potential, High soil erosion potential, and
sparsely vegetated moderately to densely vegetated 3 densely vegetated
,�,, , � ,�� � �� � �-. � � � ,�
�'ll�! tOI t����� �> ._._.;..r. ..�,,'��� . ��S .� � t � � � .v r ` Z�.�s� �','� ',�'=,'��d
,.. . ,.� . �, r ..Y� �� �. ,._. . �,*' �wt �a�. . ,-- . , ��a. 7 �,r, ��� _ . ,.� ' .,�.. ,...#::' �'�.- ,. ,.
Low floodplain functioning Moderate floodplain functioning High floodplain functioning
Flood Management 1 :CW=1 or floods >5 eazs
(VW y ) (VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods 4 years)
No stream-associated wedands, Some stream-associated wetlands, Multiple and/or lazge stream-
Score: IIoodplains 2 floodplains associated weUands, floodplains
11 < 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
medium High degree of bank armoring Moderate degree of bank azmorin 3 Low degree of bank armoring
Located in lower 1/3 of basin Located in middle 1/3 of basin 3 Located in upper 1/3 of basin
� � �
5ub�tai���,� _ �� r . ���� , � , �, � �� �.�� �,.� � ��r �-.. ,�. ,w� `
High channel alteration (>25% Moderate channel (5- Low channel alteration (natural or
Fish Habitat altered 2 25% altered) semi-natural, <5% altered
Score: Average channel shade < 25% Average channel shade 25 - 50% 3 Average channel shade > 50%
Low LWD recruitrnent potential Mediam LWD recruitment High LWD recruitmeot potential
11 (Q% of trees are >16" dbh) 2 otenrial (2-50% of trees aze > 16" (>50% of trees are >16" dbh)
Barrier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
medium adult fish passage 2 conditions bridge or ford)
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-bearing stream
bearin b ODFW 2
�� �Y�' ��� ,,,,,,yyy � �i• �' � F S$. � ^�" � Y� � b �" 3 �k 9 A �� ��
��,Jn ..,.�� , sa T� £ , 4 sZ ,_�f�d�� ,��4;iM �k�
Seasonal surface water Permanent surface water Open water pools through
Wildlife Habitat 2 summer, or multi le water es
Score: Low habitat diversity Moderate habitat diversity 3 High habitat diversity
Low sanctuary or refuge Moderate sanctuary ar refuge High sanctuary or refuge
12 2
No contiguous patches 5 acres in Contiguous patches 5-10 acres in Contiguous patches > 10 acres in
higb size size 3 size
Connectivity is low, isolated from Moderate connectivity�o upland High connectivity to upland
upiand habitats 2 habitats habitats
, ����� �, � �< ;. w � ��
.� �
�"
�:
��� < �` .. �, f','�, ' «�'.. k ' 'S,
._ �e .. , , , _„ � n ,.. _ _ .-.,+.x .r��.s .. . . . . � „i - .� __ . , _ , F , .... .� >_ � � , , «. . .. . . _._ . ... . .0
No federal or state listed species Potential habitat forfedecal or Listed federal or state species
Rarity/Integrity state listed s ecies 3 resent*
Score: 1 No ONHP priority habitats Potential ONHP priority habitats ONHP priority habitats present*
No ]ocally raze species or habitais Potenrial locally rare species or Locally raze species or habitats
� - habitats resent 3 resent"
Low native cover (> 50'/o Medium native cover (10 - 50% High native cover (< 10%
��gh invasive/non-native species) 2 invasive/non-native species) invasive/non-native species)
High human-caused disturbance Moderate human disturbance 3 Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — SA-R-1
Assessment Factors
Function Low (1 pt) Medium (2 pts) High (3 pts)
Riparian area dominated by sparse Riparian area dominated by herbs Riparian area dominated by dense
Water Quality herbs or no ve etation or s arse wood ve etation 3 wood ve etation
Average vegetated ripazian bufTer Average vegetated riparian buffer: Average vegetated ripazian buffer
Score: 25' 25'to 50' 3 50'
1 z Impervious surfaces > 25% 2 Impervious surfaces: 10% - 25°/a Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25%, Average side slope >25%, and
high s arsel ve etated moderatel to dense] ve etated 3 densel ve etated
Low soil erosion potential, or Moderate soil erosion potential, High soil erosion potential, and
1 sparsely vegetated moderately to densely vegetated densely vegetated
Sub-totals 1 2 9
Low floodplain functioning Moderate floodplain functioning High floodplain functioning
Flood Management �VW:CW=1 or floods >5 years) 2 (VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods <2 years)
No stream-associated wetlands, Some stream-associated wetlands, Multiple and/or large stream-
Score: floodplains 2 floodplains associated wetlands, floodplains
10 < 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
medium High degree of bank armoring 2 Moderate degree of bank armoring L.ow degree of bank arnaring
Located in lower 1/3 ofbasin 2 Located in middle 1/3 ofbasin L,ocated in upper 1/3 ofbasin
Sub-totals 0 10 0
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natura] or
Fish Habitat 1 altered 25% altered semi-natural, <5% altered
Score: Average channel shade < 25% Average channel shade 25 - 50% 3 Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruitment High LWD recruitment potential
9 <2% of trees are >16" dbh 2 otentia] 2-50% of trees are >16" >50% of trees are >16" dbh)
Barrier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
medium adult fish passage 2 conditions bridge or ford)
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-bearing stream
1 bearin b ODFW
Sub-totals 2 4 3
Seasonal surface water Permanent surface water Open water pools through summer,
Wildlife Habitat
3 or multi le water t es
Score: ,� Low habitat diversity 2 Moderate habitat diversity High habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge High sanctuary or refuge
8 1
No contiguous patches 5 acres in Contiguous patches 5-10 acres in Contiguous patches > 10 acres in
�ow' 1 size size size
Connectivity is low, isolated from Moderate connectivity to upland High connectivity to upland
1 upland habitats habitats habitats
Sub-totals 3 2 3
No federal or state listed species Potentiai habitat for federal or state Listed federal or state species
Rarity/Integrity 1 listed s ecies resent
Score: 1 No ONHP priority habitats Potential ONHP priority habitats ONHP priority habitats present*
No locally rare species or habitats Potentiai locally rare species or L.ocally rare species or habitats
5 1 habitats resent resent
Low native cover (> 50% Medium native cover (10 - 50% High native cover (< 10%
low 1 invasive/non-native species) invasive/non-native species) invasive/non-native species)
1 High human-caused disturbance Moderate human disturbance Low human disturbance
Sub-totals 5 0 0
Combined Score 44
West Linn Goa15 Inventory
Riparian Functional Values Assessment — SU-R-1
Function Low 1 t
Riparian area dominated by sparse
ater Quality herbs or no ve etation 2
Average vegetated riparian buffer
ore: 1 25�
1 Impervious surfaces > 25%
Average side slope < 10%, or
�' 1 s azsel ve etated
Low soil erosion potential, or
1 snarcelv veoetated
Low floodplain fuoctioning
Management 1
(VW:CW=1 or floods >5 yeazs)
No stream-associated wettands,
1 floodplains
1< 30% woody vegetaiion cover
1 High degree of bank armoring
Located in lower 1/3 ofbasin
High channel alteration (>25%
Habitat k altered
,. Average channel shade < 25%
Low LWD recruitment potentia]
1 <2% of trees are >16" dbh
Barrier(s) preventing juvenile and
1 adult 5sh passage .
Surveyed but not listed as a fish-
1 bearinQ bv ODFW
low
Score:
5
Habitat
�
�
�
fl
�
�
�
�
�
Assessment Factors
Medium (2 pts)
Ripazian area dominated by herbs
or sparse woody vegetation
Average vegetated riparian buffer:
25' to 50'
Impervious surfaces: 10% - 25%
Average side slope: t0% - 25%,
moderately to densely vegetated
Moderate soil erosion potential,
moderately to densely vegetated
Moderate floodplam functioning
(VW:CW>1.5, floods 2-5 years)
Some stream-associated wetlands,
floodplains
30 - 70% woody vegetation
Moderate degree ofbank armorin�
2 Located in middle 1/3 of basin
Moderate channel alteration (5-
25% altered
2 Average channel shade 25 - 50%
Medium LWD recruitment
otential 2-50% of trees are >lE
Biockages under some flow
surveyed
>nal surface water
2
habitat diversity
sanctuary or refuge
�ntiguo�s patches 5 acres um
ectivity is low, isolated from
�d habitats
federal or state listed species
OI�THP priority habitafs
P
locally rare species or habitats
H native cover (> 50%
�sive/non-native species)
h fiuman-caused disturbance
manent surface water
derate habitat diversity
derate sanctuary or refuge
rtiguous patches 5-IO acres in
derate connectiviry to upland
habitat for federal or st;
:cies
ONHP priority habitats
locally raze species or
�resent
native cover (10 - 50%
non-native species)
e human disturbance
ian area dominated by dense
fy vegetation
ige vegetated riparian buffer
rvious surfaces < 10°/a
age side slope >25%, and
ly vegetated
soil erosion potential, and
(VW:CW>1.5, floods <2 yeaz
Multiple and/or iarge stream-
associated wetlands, floodplai
> 70% woody vegetation
Low degree of bank armoring
Located in upper U3 of basin
v channel atteration (natural or
u-natural, <5% altered)
:rage channel shade > 50%
h LWD recruittnent potential
0% of trees aze >16" dbh)
fish barriers (aU crossings by
Ige or ford)
FW fish-bearin� stream
Open water poois through summer
or multiple waYer types
High habitat diversiry
High sanctuary or refuge
Contiguous patches > 1Q acres in
size
High connectivity to upland
Listed federal or state species
present .
ONHP priority habitats present*
Locally rare species or habitats
present
High native cover (< 10%
invasive/non-naiive speeies)
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment— TA-R-1
Function
Water Quality
Score:
10
medium
1
S�S v�� � AEr ��
Flood Management 1
Score:
9
medium
1
Su1��£b�A.1°��-���� _ �
Fish Habitat
Score:
10
medium
1
� � � � � i
su��o��'��� � , �
Wildlife Habitat
11
medium
0
�
�
[!
11
medium
Low (1 pt)
Ripazian azea dominated by sparse
herbs or no vegetation
Average vegetated ripazian buffer
25'
Impervious surfaces > 25%
Average side slope < 10%, or
sparsely vegetated
Low soil erosion potential, or
Low floodplain functioning
(VW:CW=1 or floods >5 years)
No stream-associated wetlands,
floodplains
< 30% woody vegetation cover
High degree of bank armoring
Located in lower 1/3 of basin
High channei alteration (>25%
altered)
Average channel shade < 25%
Low LWD recruitment potential
(<2%oftrees aze >lb" dbh)
Barrier(s) preventing juvenile and
adult 5sh passage
Surveyed but not listed as a fish-
sona( surface waier
v habitat diversity
v sanctuary or refuge
contiguous patches 5 acres in
mectivity is low, isolated from
md habitats
federal or state listed species
ONHP priority habitats
locally raze species or habitats
v native cover (> 50%
�sivelnon-native species)
h human-caused disturbance
Assessment Factors
Medium (2 ts)
Ripazian area donvnated by herbs
or s arse wood ve etation 3
Average vegetated riparian buffer:
2 25' to 50'
2 Impervious surfaces: 10% - 25%
Average side slope: 10% - 25%,
2 moderatel to densel ve etated
Moderate soil erosion potential,
moderately to densely vegetated
� � :„�'�� `��'""" . �3
� -�. r � � .��� ��> �. . '' t �.3
Moderate floodplain functioning
(VW:CW>1.5, floods 2-5 yeazs)
Some stream-associated wetiands,
floodplains 3
2 30 - 70% woody vegetation
2 Moderate degree of bank azmoring
Located in middle 1/3 of basin
Moderate channel alteration (5-
2 25% aitered
Average channel shade 25 - 50%
Medium LWD recruitment
2 otential 2-50%oftreesare>lf
Blockages under some flow
2 conditions
Not surveyed by ODFW for &sh
Permanent surface water
Z Moderate habitat diversity
Moderate sanctuary or refuge
Contiguous patches 5-10 acres in
size
Moderate connectivity to upland
Poteirtial habitat for federal or sG
listed species
Poternial ONFiP priority habitats
Potential locally raze species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
2 Moderate human disturbance
Riparian azea dominated by dense
woody vegetation
Average vegetated ripazian buffer
50'
Impervious surfaces < 10%
Average side slope >25%, and
densely vegetated
High soil erosion potential, and
igh floodplaum functioning
/W:CW>1.5, floods �L years)
':ultipte and/or lazge stream-
sociated wetlands, floodplains
70% woody vegetation
�w degree of bank azmoring
ocated in upper 1/3 of basin
,� r� �� ��,����
�_, _.� . �'�=���`���:'
ow channel alteration (natural or
mi-natural, <5% aftered)
verage channelshade > 50%
igh LWD recruitment potential
�50% of trees are >16" dbh)
o fish barriers (all crossings by
�idge or ford)
DFW fish-beazing streazn
IOpen water pools through summer
3 nr m�iltinle watrr tvnec
High sanctuary or refuge
Contiguous patches > 10 acres in
size
High connectivity to upland
3 habitats .
_ $ § ,��. :t � y >v
a . r�.'
Listed federal or state species
3 resent*
ONHP priority habitats present*
Locally raze species or habitats
3 resent*
High native cover (< 10%
invasivelnon-native species)
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — TA-R-2
Function Low I t)
Riparian area dominated by sparse
W ater Quality herbs or no ve etation 2
Average vegetated riparian buffer
Score: 25� 2
10 Impervious surfaces > 25% 2
Average side slope < 10%, or
medium s arsel ve etated 2
Low soil erosion potential, or
snazselv veeetated 2
Flood Management Low floodplain fimctioning
(VW:CW=1 or floods >5 years)
No stream-associated wettands,
Score: floodplains
12 < 30% woody vegetation cover
4igh High degee of bank armoring
Located in lower 1/3 of basin
High channel alteration (>25%
Fish Habitat aitered
Score: Average channel shade < 25%
Low LWD recruitment potential
� � 1 <2% of trees are >16" dbh
Barrier(s) preventing juvenile and
medium aduit fish passage
Surveyed but not listed as a Ssh-
bearin b ODFW
�ub�oT,��'���� �� � �.;� �`�
G.<. . . _
Seasonal surface water
Wildlife Habitat
Assessroent Factors
Medium (Z pfs)
arian area dominated by herbs
�parse woody vegetation
:rage vegetated riparian buffer:
to 50'
>ervious surfaces: 10% - 25%
�rage side slope: 10% - 25%,
derately to densely vegetated
derate soil erosion potential,
derately to densely vegetated
Moderate floodplain functioning
2 (VW:CW>1.5, floods 2-5 years)
Some stream-associated wetlands,
floodplains 3
2 30 - 70% woody vegetation
2 Moderate degree ofbank azmoring
Located in middle 1!3 ofbasin 3
Moderate channel alteration (5-
2 25% altered
2 Average channel shade 25 - 50%
Medium LWD recruitment
otential 2-50%oftrees are >16"
Blockages under some flow
2 conditions
Not surveyed by ODFW for Ssh
�core: ,..,.� a�au�wa uivciany 2
Low sanctuary or refuge
11 2
No contiguous patches 5 acres in
medium Size 2
Connectivity is low, isolated &om
upland habitats 2
�°�^ ` � � � _ ��.�'� �� � �,
S� ��&ts��.� �� ���s �� � ��s
� � ��:
8
t surface water
habitat diversity
sanctuary or refuge
�s patches 5-10 acres in
connectivity to upland
No federal or state listed species Potential habitat for federal or st�
1 listed s ecies
1 No ONHP priority habitats Poteniial QNHP priority habitats
No locally rare species or habitats Potentia� locally rare species or
habitats resent
Low native cover (> 50% Medium native cover (10 - 50%
mvasive/non-native species} 2 invasive/non-native species)
1 High human-caused disturbance Moderate hutnan disturbance
ian azea dominated by dense
ly vegetation
age vegetated riparian buffer
rvious surfaces < 10%
3ge side s(ope >25%, and
,ly vegetated
soil erosion potential, and
High floodplain functioning
(VW:CW>1.5, floods <2 year
Multipie and/or large stream-
associated wetlands, floodplai
> 70% woody vegetation
Low degree of bank armoring
Located in upper 1/3 ofbasin
Low channel alteration (natural or
semi-natural, <5% altered
Average channel shade > 50%
High LWD recruitment potential
>50% of trees aze >16" dbh
No fish barriers (all crossings by
bridge or ford)
ODFW 5sh-bearing sVeam
3
IOpen water pools through summer
3 or multiole water Yvoes
sanctuary or refuge
iguous patches > 10 acres in
connectiviry to upland
Listed federal or staie species
reset
ONHP priority habitats present*
Locally rue species or habitats
3 resent*
High native cover (< 10%0
invasivelnon-native species)
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — TR-R-1
Function
Water Quality
Score:
12
high
1
Sutr�a�tets � '� � "� �� �
� .. "�� _. �
F7ood Management
Score:
12
6igh
I
Fish Habitat
Score:
12
high
Low (1 pt)
Riparian azea dominated by sparse
herbs or no vegetation
Average vegetated riparian buffer
25'
Impervious surfaces > 25%
Average side stope < 10%, or
spazsely vegetated
Low soil erosion potential, or
Low 800dplam functioning
(VW:CW=1 or floods >5 years;
No stream-associated weflands,
floodplains
< 30% woody vegetation cover
High degree of bank annoring
Located in lower 1/3 of basin
High channel alteration (>25%
altere�
Average channelshade < 25%
Low LWD recruitment potential
(Q% of trees are > 16" dbh)
Barrier(s) preventing juvenile and
adult fish passage
Surveyed but not listed as a fish-
Assessmeni FacYors
Medium (2 ts) Hi h(3 ts
Ripazian azea dominated by herbs Riparian azea dominated by dense
or s arse wood ve etation 3 wood ve etation
Average vegetated riparian buffer: Average vegetated riparian buffer
25' to 50' 3 50'
2 Impervious surfaces: 10% - 25% Impervious surfaces < 10%
Average side slope� 14% - 25%, Average side slope >25%, and
moderatel to densel ve etated 3 densel ve etated
Moderate soil erosion potential, High soil erosion potential, and
moderatelv to denselv ve¢etated denselv veeetated
Moderate floodplaia fiinctioning High floodplaia functioning
2(VW:CW>1.5, floods 2-5 yeazs) (VW:CW>1.5, floods <2 yeaz
Some stream-associated wetlands, Multiple and/or Iazge stream-
floodplains 3 associated wetlands, floodplai
30 - 70% woody vegetation 3> 70% woody vegetation
Moderate degree of bank armoring 3 Low degrce ofbank azmoring
Located in middle i/3 of basin Located in upper 1/3 of basin
Moderate channel alteration (5-
2 25% altered
Average channel shade 25 - 50%
Medium LWD recruitment
2 otential 2-50%oftrees are>lf
Blockages under some flow
2 conditions
Not surveyed by ODFW for fish
channel alteration (natural or
natural, <5°lo aFtere�
age channel shade > 50%
LWD recruitment potential
No fish barriers (all crossings by
bridge or ford)
ODFW fish-bearing stream
�3
Score:
11
medium
Score:
10
medium
Habitat
Seasonal surface water
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
1 size
Connectivity is low, isolated from
upland habitats
No federal or state listed species
1 No ONHP priority habitats
No locally rare species or habitats
Low native cover (> 50%
invasive/non-native species)
High human-caused disturbance
Permanent surface water
Moderate habitaY diversity
Moderate sanctuary or refuge
2
Contiguous patches 5-10 acres in
size
Moderate connectivity to upland
2 habitats
Potential habitat for federal or st�
2 listed s ecies
Potential ONHP priority habi[ats
Potential locally rare species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
2 Moderate human disturbance
Open water pools through summer
3 or multi le water es
3 High habitat diversity
High sanctuary or refuge
Contiguous patches > 10 acres in
size
High connectivity fo upland
Listed federal or state species
resent
ONHP priority habitats present*
Locally raze species or habitats
3 resent
High native cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goal 5 Inventory
Riparian Functional Values Assessment — TR-R-2
ater Quality
15
high
Flood Management
Score:
11
medium
Low (1 pt)
ipazian area dominated by spazse
;rbs or no vegetation
verage vegetated riparian buffer
25'
npervious surfaces > 25%
verage side slope < 10%, or
�azsely vegetated
ow soil erosion potential, or
�arsely vegetated
� �'�� � �` � -�� a � �s
i4?.s ?.� x?�. .� .,�?'.fl
ow floodplain functioning
/W:CW=1 or floods >5 years)
o stteam-associated weUands,
�odplains
30% woody vegetation cover
igh degree of bank annoring
ocated in lower 1/3 of basin
Assessment Factors
Medium (2 ts)
Riparian azea dominaYed by herbs
or s azse wood ve etation 3
Average vegetated ripazian buffer:
25' to 50' 3
Impervious surfaces: 10% - 25% 3
Average side slope: 10% - 25%,
moderatel to densel ve etated 3
Moderate soil erosion potential,
moderately to densely vegetated 3
�"�r. ,�° �
�
� � �' " ,� ' 7w T �Y ti, � i , � ��%
�� ��;� �� _ �,���..�a,�, :,..��`..
Moderate floodplain functioning
(VW:CW>1.5, floods 2-5 yeazs)
Some stream-associated weflands,
2 floodplains
2 30 - 70% woody vegetation
Moderate degree of bank azmoring 3
Located in middle 1/3 of basin 3
area dominated by dense
vious surfaces < 10%
�ge side slope >25%, and
ly vegetated
soil erosion potential, and
(VW:CW>1.5, floods <2 yeaz
Multiple and/or lazge stream-
associated wetlands, floodplai:
> 70%woody vegetation
Low degree of bank azmoring
Located in upper 1/3 of basin
High channel alteration (>25% Moderate channel alteration (5- Low
Fish Habitat altered 25% altered 3 semi
Score: Average channel shade < 25% Average channel shade 25 - 50% 3 Ave�
Low LWD recruitment potential Medium LWD recruitment High
14 (<2"/0 of trees aze >16" dbh) otential (2-50% of trees aze >16" 3(>50
Barrier(s) preventing juvenile and Blockages under some flow No f
high adult fish passage 2 conditions brid�
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODF
hearino hv C1T1FW . . 3
Seasonal surface water
Wiltllife Habitat 2
Score: Low habitat diversity 2
Low sanctuary or refuge
12
No contiguous patches 5 acres in
high size
Connectivity is low, isolated from
upland habitats 2
12
federal or state listed species
ONHP priority habitats
locally raze species or habita
v native cover (> 50%
�sive/non-native species)
h human-caused disturbance
t surface water
habitat diversity
sanctuary or refuge
3
zs patches 5-10 acres in
3
connectivity to upland
Yotential riabrtat for iederal or
state listed.s ecies
Potential ONHP priority habitats
Potential locally iare species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
Moderate human disturbance
iannei aueranon �narurat or
atural, <5% altered)
;e channel shade > 50%
WD recruihnent potential
of h�ees are >16" dbh)
i barriers (all crossings by
or ford)
' fish-bearine stream
water pools through
ier, or multipie water typ
habitat diversity
sanctuary or refuge
guous patches > 10 acres
wnnectivity to upland
Listed federai or state species
3 resent"
ONHP priority habitats present*
Locally rare species or habitats
3 resent*
High native cover (< 10%
invasive/non-native species)
3 Low human disturbance
West Linn Goal 5 Inventory
Riparian Functionai Values Assessment — TU-R-i
Function
ater Quality
Low (1 pt)
iparian area dominated by sparse
;rbs or no vegetation
verage vegetated ripazian buffer
25'
npervious surfaces > 25%
verage side slope < 10°/a, or
�azsely vegetated
ow soil erosion potential, or
Assessment Factors
Medium 2 ts Hi h 3 pts)
Riparian azea dominated by herbs Ripazian area dominazed by dense
or s azse wood ve etation 3 wood ve etation
Average vegetated riparian buffer: Average vegetated riparian buffer
25' to 50' 3 > 50'
Impervious surfaces: 10% - 25% 3 Impervious surfaces < 10%
Average side stope: 10% - 25%, Average side slope >25%, and
moderatel to densel ve etated 3 densel ve etated
Moderate soil erosion potential, High soil erosion potential, and
2 moderately to densely vegetated densely vegetated
14
high
Flood Management
11
medium
Fish Habitat
13
Habitat
�
13
Integrity
11
Low floodplain functioning Moderate floodplain functioning High floodplain functioning
(VW:CW=1 or floods >5 years) 2(VW:CW>1.5, floods 2-5 years) (VW:CW>I.S, floods <2 years)
No stream-assaciated weUands, Some stream-associated wettands, Muttiple andlor lazge streazn-
floodpiains floodplains 3 associated wetlands, floodplains
< 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
High degree of bazilc armoring Moderate degree of bank azmorin 3 Low degree of bank azmoring
Located in lower I/3 of basin Located in middle 1J3 of basin Located in upper 1/3 of basin
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natural or
altered 25% altered 3 semi-nahual, <5% altered
Average channel shade < 25% 2 Average channel shade 25 - SO% Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruitment High LWD recruitment potential
<2% of trees are >16" dbh) 2 otential (2-50% of trees aze >16" (>50% of Vees aze >16" dbh)
Barrier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
adult fish ass e conditions 3 brid e or ford
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-bearing stream
bearin b ODFW 3
Seasonal surface water Permanent surface water Open water pools through
3 summer, or multi le water es
Low habitat diversity Moderate habitat diversity High habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge High sanctuary or refuge
3
No contiguous patches 5 acres in Contiguous patches 5-10 acres in 3 Contiguovs patches > 10 acres in
Connectivity is low, isolated from Moderate connectivity to upland High connectivity to upland
upland ha6itats habitats 3 habitats
No federai or state listed species Potential habitat for federal or Listed federal or state species
state listed s cies 3 resent*
No ONHP priority habitats Potential ONHP priority habitats ONHP priority habitats present*
No Locally rare species or habitats Potential locally rare species or Locally raze species or habitats
habitats resent 3 resent*
Low native cover (> 50% Medium naiive cover (10 - 50% High native cover (< 10%
invasive/non-native species) 2 invasivelnon-native species) invasive/non-native species)
High haman-caused distwbance 2 Moderate human disturbance Lovv human disturbance
Combined Score 62
West Linn Goa15 Inventory
Riparian Functional Values Assessment — TU-R-2
Function
VVater Quality
Score:
Ii
medium
Flood Management
Score:
I1 ,
mediam
Fish Habitat
Score:
12
high
Wildlife Habitat
Score:
14
Iategrity
12
high
Assessment Factors
Low (1 t) Medium (2 ts) Hi h 3 tsj
Riparian area dominated by sparse Ripazian azea dominated by herbs Riparian azea dominaied by dense
herbs or no ve etation 2 or s arse wood ve etarion woo ve etation
Average vegetated riparian buffer Average vegetated riparian buffer: Average vegetated ripazian buffer
< 25' 2 25' to 50' > 50`
Impervious surfaces > 25% Impervious surfaces: 10% - 25% 3 Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25%, Average side slope >25%, and
s azsel ve etated 2 moderatel to densel ve etated densel ve etated
Low soil erosion potenriai, or Moderate soil erosion potential, High soil erosion potential, and
sparsely vegetated 2 moderately to densely vegetated densely vegetated
Low floodplain functioning Moderate floodpIain functioning High floodplain functioning
(VW:CW=1 or floods >5 years) 2 (VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods Q yeazs)
No stream-associated wetlands, Some stream-associated wetlands, Multiple and/or lazge stream-
floodplains floodplains 3 associated weUands, floodplains
< 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetaYion
High degree of bank azmoring Moderate degree of bank annoring 3 Low degree of bank armoring
1 Located in lower 1/3 of basin Located in middle 1/3 of basin LocaYed in upper 1/3 of basin
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natural or
altered 25% altered 3 semi-natural <5% altered
i Average channei shade < 25°/a Average channel shade 25 - 50% Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruitment High LWD recruitrnent potential
(<l% of trees are >16" dbh 2 otential (2-50% of Vees aze >16" (>50% of trees aze >16" dbh)
Bazrier(s) preventing juvenile and Blockages under some flow No fish bartiers (all crossings by
adult fish ass e conditions 3 brid e or ford
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-bearing stream
bearin b ODFW 3
Seasonal surface water Permanent surface water Open water pools through
3 summer, or multi le water es
Low fiabitat diversity Moderate habitat diversity 3 High habitat diversity
Law sanctuary or refuge Moderate sanctuary or refuge High sanctuary or refuge
3
No contiguous patches 5 acres in 2 Contiguous patches 5-10 acres in Contiguous patches > 10 acres in
Connectivity is low, isolated from Moderate connectivity to upland High connectivity to upland
upland habitats habitats 3 habitats
No federal or state tisted species Potential habitat for federal or Listed federal or state species
state listed s ecies 3 resent'"
1 No ONHP prioiity habitats Potential ONHrP priority habitats ONHI' priority habitats present"`
No locally raze species or habitats Potential locally rare species or Locally raze species or habitats
habitats resent 3 resent*
Low native cover (> 50% Medium native cover (10 - 50% High native covec (< 10%
invasive/non-native species) invasive/non-native specie§) 3 invasive/non-native species)
High human-caused disturbance 2 Moderate human disturbance Low human disturbance
Combined Score 60
West Linn Goa15 Inventory
Riparian Functional Values Assessment - TY
Score:
15
high
Function
� Quality
Flood Management f 1
Score:
9
Fish Habitat
SCOre:
13
high
Wildiife Habitat
Score:
14
high
Score
medium
Low (1 pt)
Riparian azea dominated by sparse
herbs or no ve�etation
Average vegetated riparian buffer
25'
Impervious surfices > 25%
Average side slope < 10%, or
sparsely vegetated
Low soil erosion potentiai, or
�w floodplain functioning
/VJ:CW=1 or floods >5 years)
o stream-associated wedands,
�odplains
30% woody vegetation cover
igh degree of bank azmoring
�cated in lower 1/3 of basin
High channel alteration (>25%
altere�
Average channel shade < 25%
Low LWD recruitment potential
(�2,% oftrees are >16" dbh)
Bazrier(s) preventing juvenile and
adult fish passage
Not listed as a fish-6earing by
Seasonal surface water
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
size
Connectivity is low, isolated from
uoland habitats
No federal or state listed species
1 No ONHP priority habitats
No locally rare species or habitats
I
Low native cover (> 50%
invasive/non-native species)
HiQh hutnan-caused disturbance
Assessment Factors
Medium (2 pts)
�ipazian area dominated by herbs
�r sparse woody vegetatiott
�verage vegetated riparian buffer:
,5' to 50'
mpervious surfaces: 10% - 25%
�verage side slope: 10%- 25%,
noderately to densely vegetated
�oderate soii erosion potential,
noderatelv to denselv vesetated
Moderate floodplain functioning
(VW:CW>1.5, floods 2-5 yeazs)
Some stream-associated wetlands,
2 floodplains
2 30 - 70% woody vegetation
Moderate degree ofbank armorin�
Located in middle 1/3 ofbasin
Moderate channel alteration (5-
25% altered
Average channel shade 25 - 50%
Medium LWD recruitment
otential 2-50% of Vees are >lf
Blockages under some 8ow
2 conditions
Not surveyed by ODFW for Ssh
2
IPermanent surface water
2
Moderate sanctuary or refuge
Contiguous patches 5-10 acres in
size
Moderate connectivity to upland
habitats
Fotentiat habitat for federal or sl
2 listed s ecies
Potential ONHP priority habitaY:
Potential locally rare species or
habitats resent
Medium native cover (10 - 50%
2 invasive/non-native species)
Moderate human disturbance
3
3
ian area dominated by dense
ly vegetation
age vegetated riparian buffer
rvio�s surfaces < 10%
sge side slope >25°/a, and
:ly vegetated
soil erosion potentiai, and
3
3
High floodplain functioning
(VW:CW>1.5, floods �L year
Multiple and/or lazge stream-
associated wetlands, floodplai
> 70°to woody vegetation
Low degree of bank armoring
Located in upper 1/3 of basin
3
Low chazutel alteration (natural or
3 semi-natural <5% altered
3 Average channel shade > 50%
High LWD recruitment potential
3 >50% of trees aze >16" dbh
No fish barriers (all crossings by
bridge or ford)
ODFW 5sh-beazing stream
Open water pools through sucnmE
or multi le water es
3 High habitat diversity
High sanctuary or refuge
3
Contiguous patches > 10 acres in
3 size
High connectivity to upland
3 habitats
Listed federal or state species
resent
ONHP priority habitats present*
Locally rare species or habitats
resent
High native wver (< 10%
invasive/non-native species)
3 Low human disturbance
West Linn Goal 5 Inventory
Riparian Functionai VaIues Assessment— WI-
Function
Water Quality
Score:
8
Flood Management
Score:
8
low
Fish Habitat
Score:
12
Wildlife Habitat
Score:
medium
10
medium
Assessment Factors
Low (1 t Medium (2 ts
Riparian area dominated by spazse Ripazian area dominated by herbs
herbs or no ve etation 2 or s arse wood ve etation
Average vegetated ripazian buffer Average vegetated ripazian buffer:
< 25' 2 25' to 50'
Impervious surfaces > 25% 2 Impervious surfaces: 10% - 25%
Average side s[ope < 10%, or Average side slope: 10% - 25%,
1 s azsel ve etated moderatel to densel vegetated
Low soil erosion potential, or Moderate soil erosion potential,
1 sparsely vegetated moderately to densely vegetated
2 � , �� � �� � �
. ,� . �. ,��� � , ��`a,. _,,�� . ��
� �,;
Low floodplain functioning Moderate floodplain functioning
1(VW:CW=1 or floods >5 yeazs) (VW:CW>I.S, floods 2-5 yeazs)
No stream-associated wedands, Some sueam-associated wetlands,
floodplains 2 floodplains
< 30% woody vegetation cover 2 30 - 70% woody vegetation
High degree of bank armoring 2 Moderate degree of bank azmoring
1 Located in lower 1/3 of basin Loeated in middle 1/3 of basin
�" � �,� �° � ��
x ` �, � ��.� � �� �
�
High channel alteration (>25% Moderate channel alteration (5-
altered 25% altered 3
1 Average channel shade < 25% Average channel shade 25 - 50%
Low LWD recruitment potential Medium L WD recruitment
(<2% of trees ue >i6" dbh) 2 otential 2-50% of trees aze >16"
Barrier(s) preventing juvenile and Blockages under some flow
adult fish passage conditions 3
Surveyed but not listed as a fish- Not surveyed by ODFW for fish
hearino hv CInFW 3
Seasonal surface water Permanent surface water
3
Low habitat diversity 2 Moderate habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge
2
No conriguous patches 5 acres in Contiguous patches 5-10 aaes in
1 size size
Connectivity is low, isolated from Moderate connectivity to upland
1 upland habitats habitats
� � .. ... _ � , �.�. �- _
.... �., _,. : � ,._
No federal or state listed species Potential habitat for federal or
state listed s ecies 3
1 No ONHP priority habitats Potential ONHP priority habitats
No locally raze species or habitats Potential locally rare species or
habitats resent 3
Low native cover (> 50% Medium native cover (10 - 50%
invasive/non-native species) 2 invasive/non-native species)
1 High human-caused disturbance Moderate human disturbance
iparian area dominaled by dense
oody vegetation
verage vegetated riparian buffer
50'
npervious surfaces < 10%
verage side slope >25%, and
;nsely vegetated
igh soil erosion potential, and
igh floodplai� functioning
�W:CW>t.5, floods <l years}
:ultiple and/or lazge stream-
sociated wetlands, floodplains
70%woody vegetation
�w degree of bank armoring
xazed in upper 1/3 of basin
�� � ��� ����
s �.� � ���
�w channel alteration (natural or
mi-natural, <5% altered)
verage channel shade > 50%
igh LWD recruitment potentiaE
�50% of trees aze >t6" dbh)
o fish barriers (all crossings by
�idge or ford)
DFW fish-bearing stream
water pools through
�er, or muttiple water types
habitat diversity
sancivary or refuge
guous patches > 10 acres in
connectivity w upland
Listed federal or state species
present
ONHP priority habitats present"
Locally rare species or habitats
present
High native cover (< 10%
invasive/non-native species)
Low human disturbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — WI-R-2
Function
�Vater Quatity
Score:
il
medium
Flood Management
Score:
9
medium
Fish Ha6itat
Score:
13
high
16
11
medium
Assessment Factors
Low (1 t) Medium (2 ts Hi h 3 ts)
Riparian azea dominated by sparse Riparian azea dominated by herbs Riparian azea dominated by dense
herbs or no vegetation or s azse wood ve etation 3 wood ve etation
Average vegetated riparian buffer Average vegetated riparian buffer: Average vegetated riparian buffer
< 25' 25' to 50' 3 > 50'
Impervious surfaces > 25% 2 Impervious surfaces: 10% - 25% Impervious snrfaces < 1Q%
Average side slope < 10°/a, or Average side slope: 10%- 25%, Average side slope >25%, and
s arsel ve etated 2 moderatet to densel ve etated densel ve etated
Low soil erosion potential, or Moderate soil erosion potential, High soil erosion potential, and
1 sparsely vegetated moderately to densely vegetated densely vegetated
�� ; ���
� ' �
c��.�i-.._. .`�^,�,Mzi�'�.3 y'+3��er��. �4� '� ��� w5 sS� , t y '�� � �:'��b'
�.,,. .b� �° :�,.�... ..;�_ � ,,,.:'.�� `:'_:� �-�. .� �.*x.�<k.��sa
Low floodplain functioning Moderate floodplain functioning � High floodplain functioning
(VW:CW=1 or floods >5 years) 2(VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods <2 years)
No stream-associated wetlands, Some stream-associated wetlands, Multiple and/or lazge stream-
floodplains 2 floodplains associated wetlands, floodplains
1< 30% woody vegetation cover 30 - 70% woody vegetaYion > 70% woody vegetation
High degree of bank armoring Moderate degree of bank azmorin 3 Low degree of bank azmoring
1 Located in lower 1/3 of basin Located in middle 1/3 of basin LocaYed in upper 1/3 of basin
y � : : : 5 � ., ��. ? ., ;,. � . , �, - � �,
�" ",�,� .� ,Z. ��,� �r�,� ��°»� � ,.. ..�.�c �n�:��r��-�.. ' �
. . . . ..� . . .. ... .. ....�, ,.._ --„ ....,.,, ._ .�.. , .-�. . . ._._.., . h,_,-
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natural o�
altere 25% altered 3 semi-natural, <5% altered)
1 Average channel shade < 25% Average channel shade 25 - 50% Average channel shade > 50%
Low LWD recruitrneni potential Medium LWD recruitment High LWD recruitment potential
<2% of ttees aze >16" dbh otential (2-50°/a of trees are >16" 3 >50% of trees aze >16" dbh
Barrier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
adult fish passage conditions 3 bridge or ford)
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-beazing stream
beazing b ODFW 3
� . , �� �, � � ,r. , ��
� _ :� ,: �
. ,� �
:-
� � � �� �.��.. � � �:�`�.,.
Seasonal surFace water Permanent surface water Open water pools throu�h
Habitat
Low habitat diversity
� Low sanctuary or refuge
No contigaous patches 5 acres in
size
Connectivity is low, isolated from
1 upland habitats
-- � � -�- `--�� _,a _.,�� �, �
��i ,. .-:.3 - , � ;�
No federal state listed species
rtegrity
1 No ONHP priority habitats
No locally rare species or habitats
Low native cover (> 50%
invasive/non-native species) 2
High human-caused disturbance 2
3
habitat diversity 3
sanctuary or refuge
3
�s patches 5-10 acres in
3
connectivity to upland
3
itial habitat for federal or
listed species
itial OI�IHP priority habital
itial locally rare species or
ats present
um native cover (10 - SO%
,ive/non-native species)
�rate human disturbance
sanctuary or refuge
guous patches > 10 acres in
connectivity to upland
Listed federal or state species
3 resent*
ONHP priority habitats present*
Localty raze species or habitats
3 resent"
High narive cover (< 10%
invasive/non-native species)
West Linn Goa15 Inventory
Riparian Functional Values Assessmeot — WI-R-3
Function
Quality
Score
10
Managerneut
score:
]2
high
Fish Habitat
Score:
I1
medium
Wildlife Habitat
Score:
12
high
Score
12
6igh
Assessment Factors
Low (1 pt) Medium (2 ts Hi h(3 ts
Itiparian azea dominated by sparse Riparian area dominated by herbs Ripazian azea dominated by dense
herbs or no ve etation or s arse wood ve etation 3 wood ve etation
Average vegetated riparian buffer Average vegetated riparian buffer. Average vegetated riparian buffer
< 25' 25' to 50' 3 > 50'
Impervious surfaces > 25% 2 Impervious surfaces: 10% - 25% Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25°/a, Average side stope >25°/a, and
1 s arsel vegetated moderatet to densel ve etated deasei ve etated
Low soil erosion potential, or Moderatc soil erosion potential, High soil erosion potential, and
1 sparsely vegetated moderately to densely vegetated densely vegetated
� �' � � � ���� �
�',� ';: s' �,� "`�"�' � ��a`� . �` �
b� ��� K ;�� . �,.
Low floodplain functioning tl Moderate floodplain functioning High floodplain functioning
(VW:CW=1 or floods >5 years) 2 (VW:CW>1.5, floods 2-5 years) (VW:CW>1.5, floods Q years)
No stream-associated weflands, Some stream-associated wedands, Mukiple and/or large stream-
floodplains floodplains 3 associated weflands, floodplains
< 30% woody vegetation cover 30 - 70% woody vegetation 3> 70% woody vegetation
High degree of bank annoring Moderate degree of bank armorin 3 Low degree of bank armoring
i Located in lower 113 of basin Located in middle 1!3 of basin Located in upper 1/3 of basin
�� �� �_ .� �r� j 4 t f § s ., . � .tak� t,��`
� . � s;. � -�"
High channel alteration (>25% Moderate channel alteration-(5- x Low channel alteration (natural or
altered 2 25% a(tered) semi-natural, <5% altered
1 Average channel shade < 25% Average channel shade 25 - 50% Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruihnent High LWD recruitment potential
<2% of trees are > 16" dbh) 2 otendal (2-50% of trees aze >Ib" (>50% of irees aze >lb" dbh
Barrier(s) preventing juveaile and Blockages under some flow No fish barriers (a11 crossings by
adult fish passage conditions 3 bridge or ford)
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-beazing stream
bearin b ODFW 3
, .. � _. _ �
� .. . � m � .. �� �, j ....,,, - y .' "
, ..
,
a
Fd�.- e ?�� �::`�7,. ..�,`�, .. a a, ..._ .<� �._ , nsr. fi' .r r3�
� _. . ..;,, . ,�.. .. ...,- ' ,-«... . ?.,.._. . , .. a .....
Seasonal surface water Permanent surface water Open water pools through
3 summer, or multi le water es
Low habitat diversity 2 Moderate habitat diversity High habitat diversity
Low sanctuary or refuge Moderate sanctuary or refuge High sanctuary or refuge
2
No contiguous patches 5 acres in Contiguous patches 5-10 acres in
size size 3
Connectivity is low, isolated from Moderate connectivity to upland
upland habitats 2 habitats
, .. , _. . ,.. . . , .« :.._ . �.... . x
No federat or state tisted species Potential habitat for federal or
state listed s ecies 3
1 No ONHP priority habitats Potential ONHP priority habitats
No locally rare species or habitats Potentiai locally rare species or
habitats resent 3
Low native cover (> 50% Medium native cover (10 - 50%
invasive/non-native species) 2 invasive/non-native species)
I High human-caused disturbance 2 Moderate human disturbance
guous patches > 10 acres in
connectivity to upland
or state
P priority habitats present*
I(y raze species or habitats
nt*
native cover (< 10%
ive/non-native species}
human distwbance
West Linn Goa15 Inventory
Riparian Functional Values Assessment — WI-
Function
Quality
Score:
10
Management
12
high
Habitat
14
11
medium
Assessment Factors
Low (1 t Medium 2 ts) Hi h(3 ts
Ripazian area dominated by sparse Ripazian area dominated by herbs Ripazian azea dominated by dense
herbs or no ve etation 2 or s azse wood ve etation wood ve etation
Average vegetated riparian buffer Average vegetated riparian buffer: Average vegetated ripazian buffer
< 25' 25' to 50' 3 > 50'
Impervious surfaces > 25% Impervious surfaces: 10% - 25% 3 Impervious surfaces < 10%
Average side slope < 10%, or Average side slope: 10% - 25%, Average side slope >25%, and
1 s arsel ve etated moderatel to densel ve etated densel ve etated
Low soil erosion potential, or Moderate soil erosion potentiai, . High soil erosion potential, and
1 spazsely vegetated moderately to densely vegetated densely vegetated
Low floodplain functioning Moderate floodplain functioning High floodplain functioning
(VW:CW=1 or floods >5 yeazs) (VW:CW>1.5, floods 2-5 years) 3(VW:CW>1.5, floods <2 years)
No stream-associated wetlands, Some stream-associated wettands, Multiple and/or large stream-
floodplains floodplains 3 associated wetlands, floodplains
< 30% woody vegetation cover 2 30 - 70% woody vegetation > 70% woody vegetation
High degree of bank azmoring Moderate degree of bank armoring 3 Low degree of bank armoring
i Located in lower 1/3 of basin Located in middle 1/3 of basin Located in upper 1/3 of basin
High channel alteration (>25% Moderate channel alteration (5- Low channel alteration (natural or
altered 2 25% altered semi-natural, <5% altered
Average channel shade < 25% 2 Average channel shade 25 - 50% Average channel shade > 50%
Low LWD recruitment potential Medium LWD recruihnent High LWD recruitment potential
(<2% of trees are >16" dbh 2 otential 2-50% of trees are >16" >50% of trees aze >16" dbh
Banier(s) preventing juvenile and Blockages under some flow No fish barriers (all crossings by
adult fish ass e 2 conditions brid e or ford
Surveyed but not listed as a fish- Not surveyed by ODFW for fish ODFW fish-beazing stream
1 bearing b ODFW
Seasonal sutface water
Habitat
Low habitat diversity
Low sanctuary or refuge
No contiguous patches 5 acres in
Connectivity is low, isolated fror
upland habitats
�
No federal or state listed species
ttegrity
1 No ONHP priority habitats
No locally rare species or habitat
Low native cover (> 50%
invasive/non-native snecies)
Permanent surface water Open water pools through
3 summer, or multi le water es
Moderate habitat diversity 3 High habitat diversity
Moderate sanctuary or refuge High sanctuary or refuge
3
Contiguous patches 5-10 acres in 3 Contiguous patches > 10 acres in
Moderate connectivity to upland High connectivity to upland
2 habitats habitats
Potential habitat for federal or Listed federal or state species
state listed s ecies 3 resent*
Potential ONHP priority habitats ONHP priority habitats present*
Potential locally rare species or Locally rare species or habitats
habitats resent 3 resent*
Medium native cover (10 - 50% High native cover (< 10%
2 invasive/non-native species) invasive/non-naYive species)
2 Moderate human dishubauce Low human disturbance
Combined Score 56
Appendix G
Wildlife Assessments
est Linn Goa15 Inventory
ldlife Habitat Assessment Sheet
Habitat Site: Camassia / Wilderness Park
Location: Site borders I-205 and Maple Ave (south), Prospect St
(west), Skyline Dr (north), and West A St (east)
Atlas #: 5234, 5235, 5334, 5335
LWI wetlands: CA-01, CA-02, CA-03, CA-04, CA-O5, CA-06
Rinarian sites: CA-R-1
Habitat code: CA-H-1
Site size: 135 acres
Sub-basin: Camassia
Field date(s): 9/20/O1, 10/24/O1, 4/4, 4/11/02
Tnvestigators: TB, LW, AK, EL
WHA Score: 108 Enhanced Score: 108
This is a regionally unique site with an extraordinary diversity of habitats and plants. More than 300 species of plants are found at
the site, including rare Willamette Valley species such as the white rock larkspur which occurs here and at only six other places in the
world. Also rare are the wet meadows, vernal pools, and quaking aspen wetland, and the Oregon white oak-madrone woodlands that
grow on the shallow soils of this rocky plateau. The rock was exposed by the Bretz Floods 12,000 to 19,000 years ago which
scoured soil and vegetation from parts of the valley and deposited granitic boulders from as far away as Canada (a small granite
boulder was noted during field surveys). The site includes the 25-acre Camassia Preserve, 65-acre Wilderness Park, and West Linn
High School habitats. The site marks the juncture of the mesic mixed conifer-hardwood forests along the north-south ridge and the
drier, oak and grassland dominated communities associated with the shallow stony soils on the south facing hills.
COMPONENT DEGREE SCORE ENHANCED COMMENTS
QUANTITY AND NONE SEASONAL PERENNIAL 8 8
SEASONALITY 0 4 8
QUALITY LOW MEDIUM HIGH 7 7 spring-fed
0 4 8
3 PROXIMITY TO NONE NEAR ADJACENT 7 7
COVER 0 4 8
DIVERSITY (TYPES) NONE ONE TWO THREE+ 6 6 streams, wetlands, ponds
0 2 4 6
QUANTITY AND NONE LIMITED YEAR ROUND 8 8
SEASONALITY 0 4 8
A VARIETY LOW MEDItJM HTGH 8 $
O
� 0 4 8
w
PROXIMITY TO NONE NEARBY ADJACENT 7 7
COVER 0 4 8
STRUCTURAL LOW MEDILJM HIGH 6 6
DNERSITY 0 4 8
a VARIETY AND LOW MEDItJM HIGH 8 8
W SEASONALITY 0 4 8
>
O NESTING AND NONE LIMITED YEAR ROUND 4 4
DENNING SITES 0 2 4
ACCESS/ ESCAPE LOW MEDNM HTGH 4 4
0 2 4
�� PHYSICAL HIGH MEDNM LOW 4 4
� (habitat alteration) 0 2 4
�� ACTNITY HIGH MEDIi1M LOW 2 2 trails, some pets, freeway noise at south end of site
A (traffic, trash, pets) 0 2 4
INTERSPERSION/ LOW MEDIUM HIGH 5 5 north and south to Willamette River greenway; I-205
CONNECTIVITY p 4 8 is a barrier except for avians
RARITY OF HABITAT NONE RARE LTNIQUE 8 8 verna] pools, aspen wetland, oak-madrone habitat
� TYPE 0 4 8
,� FLORA NONE RARE LINIQUE 8 8 larkspur, aster, vemal pool community
`" � 0 4 8
� w FAiJNA NONE RARE LINIQUE 8 8 nesting state-sensitive species, breeding amphibians
0 4 8 ,
est Linn Goa15 Inventory
ldlife Habitat Assessment Summary — Site CA-H-1
Vegetation (*dominant)
Wildlife Observed
Birds -
American crow Canada oose Golden-crowned s arrow Mallard Red-win ed blackbird Violet een swallow
American oldfinch Cassin's vireo Great blue heron Mouming dove Rock dove Westem screech owl
American robin Cedar waxwin Great homed owl Nashville warbler Rub -crowned kin let Westem tana er
Anna's hummin bird Chesmut-backed chickadee Hei7nit thrush Northern flicker Rufous hummingbird Western wood ewee
Bald ea le Chi in s arrow Hermit warbler Olive-sided fl catcher Savannah s arrow Wh. crowned s arrow
Band-tailed igeon Common raven House finch Orange crowned warbler Sharp-shinned hawk ��'iliow flycatcher
Bewick's wren Common yellowthroat House wTen Osprey (nest) Son s arrow Wilson's warbler
Rlack-ca ed chickadee Coo er's hawk Hutton's vireo Pacifio-slo e flycatcher Spotted towhee Winter wren
�k-headed grosbeak Dark-eyed junco Killdeer Pileated woodpecker Steller's & scrub �ay Wood duck
�iacl-throated gray warbler powny woodpecker Hairy woodpecker Pine siskin Swainson's thrush Yellow-rumped warbler
Brewer's blackbird Dusky flycatcher Hammond's flycatcher Purple finch Townsend's warbler Othet' S CCIeS
Brown cree er Euro ean starlin Lazuli buntin Pu te martin Tree swallow Black tailed deer
Brown headed cowbird Evenin grosbeak Lesser goldfinch Red crossbill Turke wlture Chorus fro
Bullock's oriole Flicker Lincoln's s arrow Red-breasted sa sucker Varied thrush Lon toed salamander
Bushtit Fox s arrow MacGitlivray's warbler Red-tailed hawk Vaux's swift NW salamander
Special Features
' Halixtat/S �'et�es : , ,, . ,Sta"tus/Dis` osition , Remarks ', , `
Vernal ools, uakin as en wetland Uni ue to re ion, rare in Willamette Valle Camassia Preserve
Baccharis First re orted occurrence in Clackamas Coun Camassia Preserve
White rock larks ur Federal SoC / State LE / ONHP list 1 Camassia Preserve, basalt outcro s; only 7 sites in the world
White-to ed aster Federal SoC / State LT / ONHP list 1 Camassia Preserve
Bald ea le Federal LT / State LT / ONHP ]ist 2 Observed from Camassia
Bandtailed igeon Federal SoC /-/ ONHP list 4
Little willow fl catcher -/ State SV / ONHP ]ist 4
Olive-sided fl catcher Federal SoC / State SV / ONHP list 4
Pileated wood ecker -/ State SV / ONHP list 4
Purple martin Federal SoC / State SC / ONHP ]ist 2
Assessment Results
Water High Disturbance High
�d Hi h Connectivi Medium
�ver High Unique Features High
�West Linn Goa15 Inventory
�w ildlife Habitat Assessment Sheet �
�_ . .. ; �, �F
GENERr�L Ilr'FORMA'�'ION =
Habitat Site: Fritchie Creek Habitat code: FR-H-1
Location: Interstate 205 north to study limits (LTGB) and east to Site size: 68 acres
vicinity of Bland Circle; includes 2 sub-areas (as mapped) Sub-basin: Fritchie Creek
Atlas #: 5231, 5330, 5331, 5332 Field date(s): 8/30/O1, 3/20, 3/21, 4!3/02
LWI wetlands: FR-01 Investigators: TB, LW, AK, EL
Ri arian sites: FR-R-1, FR-R-2 WHA Score: 87 Enhanced Score: 91
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SITE STIMMARY � � �� ��, `' �� �.. ' T' ;�.r �„ °�
This site is composed of two sub-areas of the upper Fritchie Creek basin: 1) north and middle forks of Fritchie and 2) south fork. The
site contains a diverse, cedar dominated riparian forest with palustrine emergent wetlands at base of the canyon slopes. The corridor
connects with the large forested habitats to the west of the study area. The southern sub-area is a forested, generally narrow corridor
consisting primarily of the North Willamette Park and Tanner Open Space. The site includes a mixed forest community with the
oldest Pacific madrone trees (more than 40" diameter) observed in the City. Habitat types at this site include Conifer Forest, Mixed
Conifer/Hardwood Forest, Hardwood Forest, Mixed shrub/herbaceous, Meadow/grassland, and Palustxine Emergent wetlands.
Potential enhancement opportunities include replacement of the culverts under I-205 w�ith large arch culverts or bridges that could
restore free passage of fish and wildlife between the site and Tualatin River riparian habitats.
COVIPONENT DEGREE SCORE ENHAIVCED COM:�iENTS
QUANTITY AND NONE SEASONAL PERE:�INIAL 8 8
3EAS01�'ALITY 0 4 S
, QUALITY LOW MEDNM HIGH 7 7
0 4 8
3 PROXIMITY TO :�'ONE NEAR ADJACENT 7 7
COVER 0 4 8
DNERSITY (TYPES) NONE ONE TWO THREE+ 6 6 streams, ponds, wetlands
0 2 4 6
QUANTITY AND NONE LTMITED YEAR ROUND 8 8
SEASONALITY 0 4 8
p VARIETY LOW MEDNM HIGH 7 8 manage invasives/diversify with natives
� 0 4 8
w
PROXIMITY TO NONE NEARBY ADJACENT 7 7
COVER 0 4 8
STRUCTURAL LOW MEDILTM HIGH 6 8 mid-canopy layer thin in areas
DNERSITY 0 4 8
� VARIETY AND IAW MEDIiJM HIGH 7 7 some snags and large wood
� SEASONALITY 0 4 8
O NESTING AND NONE LIMITED YEAR ROUND 4 4
DENNING S1TES 0 2 4
ACCESS/ ESCAPE LOW MEDNM HIGH 4 4
0 2 4
z q PHYSICAL HIGH MEDILIM LOW 2 3 I-205, residential deve}opment; revegetate buffer
� � (habitat alteration) 0 2 4
a� ACTNITY HIGH MEDNM LOW 4 4
� A (traffic, trash, pets) 0 2 4
L'YTERSPERSION/ L.OW MEDNM HIGH 6 6 westem site part of large habitat patch west of city
CONNECTIVITY 0 4 8
RARITY OF HABITAT NONE RARE i1NIQUE 4 4 cedar/skunk cabbage community, beaver pond, large
W TYPE p 4 g connected habitat patch
� FLORA NONE RARE UNIQUE 0 0
� H
a 0 4 8
� w FAUNA NONE RARE UNIQUE p 0
0 4 8
est Linn Goal 5 Inventory
Habitat Assessment Summary — Site FR-H-1
Vegetation (*dominant)
Wildlife Observed
Birds :. " Re 'tiles/Am hibians 'Mammals
American robin Bushtit Stellar's jay Potential amphibian Beaver
Bewick's wren Cedar waxwing Swainson's thrush breeding in beaver pond Bfack tailed deer
Black-cap ed chickadee Common yellowthroat Western wood pewee
Black headed grosbeak Song sparrow
Brown headed cowbird Spotted towhee
Special Features
Assessment Results
�est Linn Goa15 Inventory
ildlife Habitat Assessment Summary
Habitat Site: Lower Fern Creek
Location: Northern city limits south to Lower Fern Creek along old
River Dr -Willamette River west to Hwy. 43
Atias #: 4732, 4832, 4833
LWI wetlands: FE-02
Rinarian sites: AR-R-1, RO-R-1, FE-R-1
Habitat code: FE-H-1
Site size: 49 acres
Sub-basin: Fern Creek
Field date(s): 9/20, 10/24/O1, 4/4, 6/6, 6/27/02
Investigators: TB, AK, EL
WHA Score: 80 Enhanced Score: 87
A conriguous patch of habitat with more than two miles of uninterrupted stream corridors, including Fern Creek and the lower
reaches of Arbor and Robinwood Creek txibutaries. The fish-bearing streams flow through steep forested ravines, merging on a
broader floodplain terrace with braided stream channels west of and parallel to Old River Drive. The site contains a mosaic of
upland, riparian, and wetland habitats with its core located within an approximately 13-acre future community park site at the end of
Fairview Way. The farested stream corridor continues north with only one crossing (Old River Drive) before connecting to
Willamette riverine and riparian habitats across from Hog Island. Habitat types at this site include Mixed Conifer/Hardwood Forest,
Hardwood Forest, and Meadow/grassland, with Palustrine Scrub-Shrub wetlands.
COMPONENT DEGREE SCORE ENHANCED COMYIENTS
QUANTITY AND NONE SEASONAL PERENNIAL 8 8
SEASONALITY 0 4 8
x QUALITY LOW MEDNM HIGH 5 5
� 0 4 8
PROXIMITY TO NONE NEAR ADJACENT 7 7
COVER 0 4 8
DNERSITY (TYPES} NONE ONE TWO THREE+ 4 4 streams and wetiand
0 2 4 6
QUANTITY AND NONE LIMITED YEAR ROUND 8 8
SEASONALITY p q g
Q VARIETY LOW MEDNM HIGH 6 8 manage invasive species; replant native shrubs
O
� 0 4 8
w
PROXIMITY TO NONE NEARBY ADJACENT 6 7
COVER 0 4 8
STRUCTURAL LOW MEDIUM HIGH 8 8 multiple layers, snags, large wood in streams
DIVERSITY 0 4 8
a VARIETY AND LOW MEDILIM HIGH 7 8 mixed-age cedars and other evergreens; manage
? SEASONALITY p q g invasive species
O NESTING AND NONE LIMITED YEAR ROLJND 3 4 limit access, improve buffers
DENNING SITES 0 2 4
ACCESS/ ESCAPE LOW MEDIUM HIGH 4 4
0 2 4
�� PHYSICAL HIGH MEDICTNI LOW 2 3 disturbed edges, storm discharge
� (habitat alteration) 0 2 4
a� ACTIVITY HIGH MEDILJM LOW 2 3 nearby residences; improve buffers
.�
A (traffic, trash, pets) 0 2 4
INTERSPERSION/ LOW MEDNM HIGH 4 4 internally well-connectad but surrounded by
CONNECTIVITY p q g residential development except to north
RARITY OF HABITAT NONE RARE UNIQUE 2 2 small cedar / skvnk cabbage community
W TYPE 0 4 8
�, � FLORA NONE RARE UNIQUE 0 0
, � 0 4 8
I� w FALJNA NONE RARE UNIQUE 4 4 pileated woodpecker
0 4 8
est Linn Goal 5 Inventory
life Habitat Assessment Summary — Site FE-H-1
Vegetation (*dominant)
Wildlife Observed
Special Features
Assessment Results
est Linn Goa15 Inventory
ldlife Habitat Assessment Summary
Habitat Site: Tualatin River
Location: Fritchie Creek confluence (near I-205) to mouth of Tualatin
River at Willamette Park
Atlas #: 5330, 5429, 5430, 5529, 5530, 5531, 5631
LWI wetlands: TU-01 through TU-O5, FR-02, FR-03, FR-04
sites: TU-R-1, TU-R-2. FR-R-I. FR-R-2
Habitat code: TU-H-1
Site size: 137 acres
Sub-basin: Tualatin River
Field date(s): 8/30, 9/20/O1, 3/20, 3/21/02
Investigators: TB, LW, AK, EL
WHA Score: 87 Enhanced Score: 92
Tualatin River site extends 2.5 miles from Fritchie Creek to confluence with Willamette River. The broad river valley narrows at
Borland Bridge to a steeper gradient channel through forested river canyon with steep walls to the south and a series of stepped
floodplain and hillslope terraces to the north, bordered by residential neighborhoods. This site includes the 14-acre Tualatin River
Open Space, the new 20-acre City Riverfront park, 9-acre Swift Shores Open Space, and a small portion of Willamette Park.
The Tualatin and lower Fritchie Creek riparian corridors provide diverse forage and nesting habitat for a wide variety of wildlife
including severai federal and state-listed species. The river has a functioning, well-connected floodplain with remnant oxbows, and is
directly linked to larger forest habitats to the west. Habitat types include Conifer Forest, Mixed Conifer/Hardwood Forest, Hardwood
Forest, Bottomland Forest, Shrub, Mixed shrub/herbaceous, and Meadow/grassland. Wetland habitats include: Palustrine Forested,
Palustrine Emergent, and Open Water. Across from the new City park is a wet-season waterfall, a rare feature in the region.
COMPONENT DEGREE SCORE ENHAl�'CED COMMENTS
QUANTITY AND NONE SEASONAL PERENNIAL 8 8
SEASONALITY 0 4 8
QUALIT'I' LOW MEDIUM HIGH 4 4 WQ limited stream
0 4 8
r�
3 PROXIMITY TO NONE NEAR ADJACENT 8 8
COVER 0 4 8
DNERSITY (TYPES) NONE ONE TWO THREE+ 4 4 river, wetlands
0 2 4 6
QUANTITY AND NONE LIMITED YEAR ROi1ND 7 8 persistent fruits, seeds, other food sources
SEASONALITY 0 4 8
A VARIETY LOW MEDNM HIGH 7 8 revegetate/diversify invasive dominated areas
O
� 0 4 8
w
PROXIMITY TO NONE NEARBY ADJACENT 7 7
COVER 0 4 8
STRUCTURAL LOW MEDI[JM HIGH 6 7 mid-canopy ]ayers limited in areas
DNERSITY 0 4 8
� VARIETY AND LOW MEDNM HIGH 6 8 revegetate/diversify invasive dominated areas
� SEASONALITY 0 4 8
O NESTING AND NONE LIMITED YEAR ROUND 3 3
DENNING SITES 0 2 4
ACCESS/ ESCAPE LOW MEDNM HIGH 3 3
0 2 4
�� PHYSICAL HIGH MEDNM LOW 3 3
� (habitat alteration) 0 2 4
�� ACTIVITY HIGH MEDIUM LOW 2 2
x A (traffic, trash, pets) 0 2 4
INTERSPERSION/ LOW MEDNM HIGH 7 7
CONNECTIVITY 0 4 8
RARITY OF HABITAT NONE RARE LTNIQUE 4 4 predominantly natural, free-flowing river corridor
W TYPE p q g well connected to large habitat patches
0, � FLORA NONE RARE UNIQUE 0 0
F ' 0 4 8
� w FAiJNA NONE RARE UNIQU� 8 8 listed birds, amphibian, and fish species
0 4 8
est Linn Goal 5 Inventory
Habitat Assessment Sucnmary — Site TU-H-1
Vegetation (*dominant)
Wildlife Observed
Birds ° Am hibians .
American crow Brown towhee Northern flicker S otted sand i er Red le ed fro
American oldfinch Bushtit Osprey Starlin Ensatina
American kestral Cedar waxwin Pileated woodpecker Stellars ja Rough-skinned newt
American robin Common mer anser Pine siskin Townsend's Warbler Pacific chorus fro s(e s
Allen's hummingbird Coo er's hawk Pu le finch Turkey wlture
Anna's humminobird Down wood ecker Red breasted nuthatch Varied thrush
Bald eagle Evening grosbeak Red-breasted sapsucker Violet een swallow
Band-tailed i eon Fox sparrow Red-tailed hawk Westem tanager
Belted kin fisher Golden-crowned kin let 12ed-win ed blackbird White win ed dove
Bewick's wren Great blue heron Ruby-crowned kinglet White crowned s arrow
Black-ca ed chickadee Hairy wood ecker Rufous hummin bird Wilson's warbler
Black-headed grosbeak House s arrow Scrub jay
Btack-throated gray warbler Lesser goldfinch Sha -shinned ha�vk
Brewer's blackbird Mallard Son s arrow
Brown cree er Mourning dove S otted towhee
Special Features
'Habitaf/S ecies : : ' Sfatus/Dis osition Remarks � �'
Bald ea le Federal LT / State LT / ONHP list 2
Bandtailed igeon Federal SoC /-/ ONHP list 4
Little willow flycatcher -/ State SV ! ONHP list 4
Pileated wood ecker -/ State SV / ONHP list 4 Nestin , fora 'n
Red leg ed fro Federal SoC / State SV / ONHP list 2 Breedin at Swift Shores ond
Winter steelhead Federal LT / State SC / ONHP list 1 Miaration
Coho salmon Federal C/ State LE / ONHP list 1 Rearin , mi ation
Assessment Results
est Linn Goa15 Inventory
ldlife Habitat Assessment Summary
Habitat Site: Upper Bernert Creek
Location: Upper Bernert Creek bordered by Tannler Drive (west),
Haskins Road (north), and I-205 (south)
Atlas #: 5332, 5431, 5432
LWI wetlands: N/A
Rinarian sites: BE-R-1
Habitat code: BE-H-1
Site size: 39 acres
Sub-basin: Bernert Creek
Field date(s): 4/22/02, 6/27/02
Investigators: TB, LW, AK
WHA Score: 50 Enhanced Score: 58
This is a relatively small site in the upper Bernert Creek basin distinguished by having a small remnant oak savanna/grassland
habitat. A mixed Douglas fu/bigleaf maple forest is located northeast of the oak community. The upper Bernert Creek corridor
continues south of Salamo Road through maple and oak dominated forest before reaching I-205. Residential neighborhoods border
and bisect the site, and I-205 is located to the south. Habitat types include Mixed Conifer/Hardwood Forest, Hardwood Forest, Oak
Woodland, and Mixed shrub/herbaceous. The site provides forage, cover, and nesting habitat for a variety of wildlife including
species associated with oak communiries such as band tailed pigeon (federal Species of Concern).
COMPONENT DEGREE SCORE ENHANCED COMMENTS
QUANTITY AND NONE SEASONAL PERENNIAL 4 4 limited water sources within site
SEASONALITY 0 4 8
� QUALITY LOW MEDNM HIGH 4 4
w 0 4 8
+ PROXIMITY TO NONE NEAR ADJACENT 4 4
COVER 0 4 8
DIVERSITY (TYPES) NONE ONE TWO THREE+ 2 2 Bemert Creek
0 2 4 6
QUANTITY AND NONE LIMITED YEAR ROtJND 5 6 add seed, berry-bearing species
SEASONALITY 0 4 8
A VARIETY LOW MEDILJM HIGH 4 6 revegetate/diversify invasive dominated areas
O
� 0 4 8
w
PROXIMITY TO NONE NEARBY ADJACENT 5 6
COVER 0 4 8
STRUCTURAL LOW MEDIiJM HIGH 4 5 add shrubs, mid-canopy layer
DNERSITY 0 4 8
� VARIETY AND LOW MEDI[JM HIGH 3 5 diversify species mix
w SEASONALITY 0 4 8
>
O NESTING AND NONE LIMITED YEAR ROUND 2 2
DENNING SITES 0 2 4'
ACCESS/ ESCAPE LOW MEDNM HIGH 2 2
0 2 4
�� PHYSICAL HIGH MEDNM LOW 2 3 housing and roads, invasive species (manage,
a (habitat alteration) 0 2 4 revegetate with natives)
p� ACTNITY HIGH MEDItJM LOW 1 1 continuous freeway noise, residential activity/traffic,
x A (traffic, trash, pets) 0 2 4 Pe�
INTERSPERSION/ LOW MEDNM HIGH 2 2
CONNECTIVITY 0 4 8
RARITY OF HABITAT NONE RARE UNIQUE 4 4 remnant oak savanna
W TYPE 0 4 8
�; � FLORA NONE RARE UNIQUE 0 0
� 0 4 8
I"� w FAiJNA NONE RARE LJNIQUE 2 2 band tailed pigeon
0 4 8
est Linn Goal 5 Inventory
ldlife Habitat Assessment Summary — Site BE-H-1
Vegetation (*dominant)
Wildlife Observed
Birds ' Re tiles/Am hibians. Mammals
Band tailed pigeon Scrub jay
Black-ca ed chickadee Son s arrow
American goldfinch Violet green swallow
Oregonjunco
Special Features
Assessment Results
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' 1Vote: t� por�tivn of this wetlands inv��tory map is covered at
N AT i O� A L 1oV ET LA I� D S I�V V�� T C� R Y a larger scale and in much greater detail by a Local Wetlands
UNITED STATES DEPARTMENT OF THE INTERI4R Inventory. Please contact the Division of State Lands
(503/378-3805) for information.
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' 6� ; SPECIAI NOTE NOTES TO 7HE USER h :� x
� > � M��¢ , Thie document we� prepeire�� ;�rrlmarily by e,ereo�capic 6YM B O L O S 3 Y E X A R R P t E ' '�''� '�" �,
Wetlands w hich h av e b e e n f i e l d e x a m i n e d a r e i n d i c a t e � �;
��' �' �� ` � - a n p lye l� a t h:g h a lt itu de aer ia3 p hatogropt;s. Watlands were on the map by an asterisk 1"1. �'' '�'
` z� �,,_. �-_,�.,.,., `� �� {€e ��� IdenClfi�d on the phctoprephs besed on vepetet�on, vinlble • Dominence type (either vegetative or sedentary animel) � �, ` '
•1 K��:oMez:k hydrology, and geagraphy ir. eccordence w�th Cle�rriflcr• ,��°: � C S
:•,� �__ SYSTEM can be addad to tha map by the intorested user.
-=:-z =� .. . �lon od Wstlandi and D�sp•Wata► Habfiat� of ;he United S>.�BSYST'cM • Additions or corrections to the wetlands information � ' `�„
Stpt�� 1¢.n Operatio�ai Drattl, Cowardin, ��t af, 1977. Tho / CLASS d{splayed on this map are solicited. Please forwerd such ,../ � � i ,
ee�lel phptc,praphe typicaily reftect condRione during the +'�' ~ `'�' � ��" '
/� in#ormetion to the address indicated, fal � I� �
apecitic yaar and seeson when ;hey w�re teken. Ir. eddi- E2EM5N' • Some areas designated R4SB, R4SBW, or R4SBJ °
tion, there is � mrr�in of errcr inherenc in the use af the fintermittent streams) may no3 meei the definition of 7 �>- s _,, _ �� ~ `
aeriel photographa, T; r,�e, a deteiled on the ground and SUBCLASS, WATER REGfME wetlands. , . � - '��� r ���
� .�;
historica� ana�ys�s af a ains�e ,.ite mey res:ult in e ievision of �y UPLri��D IN�N-WETLANDSI ��,.�
w�t�and resources depicted ihe we�cian� boun�daries esiablished throueh photo�rephic �''f A�RIAL PHOTOGRAPHY �� r�T
a. +nformation, C0�9t�Ct: +nterpretatia��. fn eddition, some smeli wetlends end thoae � �,, ��
ohaCUred by dense fr�rest cc�er may not be ir�cluded on this ��' � � � ` � 4
doaument, � Pf or PKf FARMED WETLANDS �ATE: 8,I + ��� �, , �
Fede�►al, State and 6oca1 re�s.:latory egenciea with jur:adic• C�.NTROlLEO WATER REGIME � SCALE; �' S.a �� Q`= '
, tion ov�er wotlende mey define er,e� deacribe wetiend� in a '._U S OF`"THE INTERIt
dlfferent manner then that used ir. thiF inventory. There la ' , ". � ; ,, ; . '.. , TYPE� - � �.'.r � �= 5 > '^ '�• + -
- no atte �R ,, � . • , • „�: .- , . . . C .., � ��: EA ,r,
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