21-100017_Wetland Delineation Report_12-12_2020_ v1
WETLANDS AND DRAINAGE CORRIDORS
EVALUATION & DELINEATION REPORT
&
Conceptual Wetland Mitigation Plan
for
Reasonable Use Exception
P & M Development Parcels
PARCEL # 1421039069, 1421039087, & 1421039043
33305 43rd Avenue Southwest and adjacent east
CITY OF FEDERAL WAY, WASHINGTON
City File folder #20-104505
Prepared for:
Ms. Michelle Henry, PE
P & M Development LLC
35001 NE 147TH AVE
Yacolt, WA 98675
p.m.development@outlook.com
360-281-8195
Prepared by
Beaver Creek Environmental Services, Inc.
P. O. Box 731695
Puyallup, WA 98373
253 732-6515
MHeckert@Q.Com
November 10, 2020
EXECUTIVE SUMMARY
The P & M Development Project Site is a 73,495 sq. ft., 1.7-acre project area comprised
of three parcels #s 1421039069, 1421039087, & 1421039043, located at 33305 43rd Ave.
SW and adjacent east, City of Federal Way, Washington. An assessment of this project
area following the procedures outlined in the Corps of Engineers (CoE) Wetland
Delineation Manual - 2010 Western Mountains, Valleys, and Coast (WMVC) Regional
Supplement, Revised Washington State Wetland Rating System (WSWRS), and City of
Federal Way Code 19 (Critical Areas) resulted in the identification of one wetland area
(Wetlands A) and two Aquatic Areas.
Onsite assessment included an evaluation of the function and value rating for each
wetland, a classification of each wetland and stream following the U.S. Fish and Wildlife
Service methods, a categorization of each wetland and stream following City of Federal
Way Code 19 - Critical Areas, and an identification of the standard City of Federal Way
buffer width.
WETLAND SIZE
(acre)
CITY OF
FEDERAL WAY
CATEGORY
WA WETLAND
RATING
SCORE
GENERAL
BUFFER WIDTH
Adjustment by
Function And
Land Use
Buffer
Total
A 18+ II 22 150 ft. 0 ft. 150 ft.
* Wetland size onsite – east, west & north boundary not defined, continues off site
The Seattle District U.S. Army Corps of Engineers, the Washington Department of
Ecology, and City of Federal Way (as well as a number of other resource agencies)
regulate activities in and around identified wetland and stream areas. Such regulations
focus on the avoidance of adverse impacts to wetlands and the mitigation of such impacts
that cannot be avoided. In addition, City of Federal Way has established criteria to
categorize wetlands for purposes of regulation and requires a buffer along wetland and
drainage corridor areas.
As presently defined for the site the proposed action is to site single-family house on each
parcel.
These parcels are zoned residential. Regulated wetlands and their buffers encompass
the entire site. To enable development, the wetland and stream buffers must be reduced
substantially. No regulated wetland will be impacted. Due to site conditions, the buffers
must be reduced to accommodate development. Reasonable Use Exception or variance
is required to enable development. Minimized portions of each parcel is dedicated to the
homesite. The remainder of each parcel is to be fenced and remain undeveloped.
TABLE OF CONTENTS
EXECUTIVE SUMMARY .............................................................................................. 2
INTRODUCTION............................................................................................................. 1
STUDY PURPOSE ......................................................................................................... 1
SITE DESCRIPTION ..................................................................................................... 1
BACKGROUND INFORMATION ................................................................................ 2
NATIONAL WETLAND INVENTORY ....................................................................... 2
CITY OF FEDERAL WAY WETLAND INVENTORY ............................................... 2
WDFW PRIORITY HABITS AND SPECIES DATA ................................................................. 2
SOILS MAPPING ........................................................................................................... 2
ONSITE ANALYSIS ........................................................................................................ 2
CRITERIA FOR WETLAND AND STREAM IDENTIFICATION .............................. 2
STUDY METHODS ....................................................................................................... 3
FIELD OBSERVATION ................................................................................................ 3
WETLAND AND STREAM DETERMINATION ........................................................ 4
WETLAND FUNCTION AND VALUE ASSESSMENT ............................................. 5
SITE WETLAND VALUATION ................................................................................... 6
REGULATORY CONSIDERATION ............................................................................. 6
U.S. ARMY CORPS OF ENGINEERS - SECTION 404 ................................................... 7
STATE OF WASHINGTON DEPARTMENT OF ECOLOGY ..................................... 7
CITY OF FEDERAL WAY ............................................................................................ 8
SELECTED DEVELOPMENT ACTION ...................................................................... 9
IMPACT ASSESSMENT ................................................................................................. 9
CONCEPTUAL MITIGATION PLAN ........................................................................ 10
FIGURES ......................................................................................................................... 11
REFERENCE LIST ........................................................................................................ 12
ATTACHMENT 1 - WETLAND DELINEATION MAPS ......................................... 13
ATTACHMENT 2 .......................................................................................................... 14
WESTERN WASHINGTON - REVISED WASHINGTON STATE WETLAND
RATING SYSTEM(WSWRS) FORM .......................................................................... 14
ATTACHMENT 3 – FIELD DATA FORMS .............................................................. 15
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STANDARD OF CARE
Prior to extensive site planning, this document should be reviewed and the wetland
boundaries verified by the appropriate resource and permitting agencies. Wetland
boundaries, wetland classifications, wetland ratings, and proposed buffers should be
reviewed and approved by City of Federal Way Planning and Land Services and
potentially other regulatory agencies. Beaver Creek Environmental Services, Inc. (BCES)
has provided professional services that are in accordance with the degree of care and
skill generally accepted in the nature of the work accomplished. No other warranties are
expressed or implied. BCES is not responsible for design costs incurred before this
document is approved by the appropriate resource and permitting agencies.
Mark Heckert
BCES
1
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INTRODUCTION
This report details the activities and onsite evaluations undertaken to complete a wetland
and drainage corridor evaluation as an element of the planning and site development of
the P & M Development Site. The P & M Development Project Site is an approx. 1.7-
acre project area comprised of Parcels # 142103-9069, 9087, and 9043, located at 33305
43rd Ave. SW and adjacent east, City of Federal Way, Washington.
The evaluation and delineation of onsite and adjacent wetlands and drainage corridors is
a vital element in the planning and selection of a site development action. The goal of
this approach is to assure that planned site development does not result in adverse
environmental impacts to regulated wetlands, streams, and their associated protective
buffer areas.
Wetlands are generally defined as "those areas that are inundated or saturated by surface
water or ground water at a frequency and duration sufficient to support, and that under
normal circumstances do support, a prevalence of vegetation typically adapted for life in
saturated soil conditions."
(City of Federal Way Title 19).
STUDY PURPOSE
The purpose of this document is to present the results of an onsite assessment and
evaluation of wetland areas within the P & M Development Project Site following the
methods and procedures outlined in the Corps of Engineers (CoE) Wetland Delineation
Manual - 2010 Western Mountains, Valleys, and Coast (WMVC) Regional Supplement
and City of Federal Way Code 19 (Environmentally Critical Areas), and categorized using
the Revised Washington State Wetland Rating System (WSWRS). Drainage corridors
were also assessed in accordance with the criteria established by City of Federal Way
and the State of Washington Department of Natural Resources (WDNR) Forest Prac tice
Rules (WAC 222-16-030). This study was designed to accommodate site planning and
potential regulatory actions and is suitable for submittal to federal, state, and local
authorities for wetland and stream boundary verification and permitting actions.
SITE DESCRIPTION
This project site is irregular, 73,945 sq. ft. [1.7 acre] total (fig. 2). The site is vacant of
development. The site apparently formally contained a mobile home, and contained huge
quantities of trash. The site has apparently been a dump for many years. The current
owners have removed six containers of trash since owning th e site, and the removal is
completed.
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BACKGROUND INFORMATION
NATIONAL WETLAND INVENTORY
The National Wetland Inventory (NWI) mapping completed by the U.S. Fish and Wildlife
Service was reviewed as a part of this asse ssment (fig. 3). This mapping resource
identifies no wetlands on the project site. A linear R4SBC (Riverine Intermittent
Streambed Seasonally Flooded) is described flowing generally within the project site.
CITY OF FEDERAL WAY WETLAND INVENTORY
The City of Federal Way Wetland Inventory Mapping was reviewed as a part of this
assessment (fig. 4). This mapping resource identifies a large wetland complex through
the west and north of the project site, designated 14-21-3-4. This wetland has been
characterized by the City as a Category II(2) Wetland. Wetland continues significantly
offsite to the north.
WDFW Priority Habits and species data
WDFW Priority Habitats and Species (PHS) data was reviewed as a part of this
assessment (attached). This mapping resource identified no priority habitats or species
in the project site.
SOILS MAPPING
Soil Resource Report by NRCS was reviewed as a part of this assessment (fig. 5). This
mapping identified the following soils throughout the project site: AgC - Alderwood
gravelly sandy loam, 8 to 15 percent slopes These soils are listed as “hydric”.
ONSITE ANALYSIS
CRITERIA FOR WETLAND AND STREAM IDENTIFICATION
Wetlands are transitional areas between aquatic and upland habitats. In general terms,
wetlands are lands where the extent and duration of saturation with water is the primary
factor determining the nature of soil development and the types of plant and animal
communities living in the soil and on its surface (FGDC, 2013). Wetlands are generally
defined within land use regulations as "areas that are inundated or saturated by surface or
groundwater at a frequency and duration sufficient to support, and that under normal
circumstances do support, a prevalence of vegetation typically adapted for life in saturated
soil conditions" (CoE Manual).
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Wetlands exhibit three (3) essential characteristics, all of which must be present for an area
to meet the established criteria within the Wash. Manual and the CoE Manual. These
essential characteristics are:
1. Hydrophytic Vegetation: A predominance of plants that are typically adapted
for life in saturated soils.
2. Hydric Soil: A soil that is saturated, flooded, or ponded long enough during the
growing season to develop anaerobic conditions in the upper horizons.
3. Wetland Hydrology: Permanent or periodic inundation, or soil saturation to the
surface, at least seasonally.
STUDY METHODS
BCES Consulting completed a specific onsite evaluation of the project area on May 15,
2020. The objective of this evaluation was to define and delineate potential wetland and
drainage corridor areas which may be present within and adjacent to the project area as
defined by the three-parameter criteria test noted within the Wash. Manual and CoE
Manual, and the water-typing criteria noted within the WDNR Forest Practice Rules (WAC
222-16-031).
Boundaries between wetland and non-wetland areas were established by examining the
transitional gradient between wetland and non-wetland characteristics criteria throughout
the site. Delineation was performed using the routine methodology for areas less than
five acres as detailed in the CoE Manual.
FIELD OBSERVATION
As defined by existing site conditions and aerial photos, the project site has experienced
extensive use and development. The site is three residential parcels, which are vacant
now. Prior to cleanup, the site was a dumping ground in addition to the housing debris on
the site. A stream transects the site through the western parcel flowing north. The parcels
appear to have been filled in the area around the entrance road in original development
of the parcel, along the periphery of the wetland. It appears the stream was rerouted to
the west to accommodate the original house placement.
• Soils
The majority of the project site was comprised of Alderwood gravelly sandy loam, a non-
wetland soil.
The soils proximal to the access road and continuing north approximately 100 ft. appear
to be installed fill. North of that area o f the site soils are dark gray to black silt loam and
peat, with concretions and organic streaking. This area appears to remain saturated to
the surface well into the growing season. The surface soil layer within the Wetlands A
depression was generally silt loam. Soils in Wetland A meet the hydric soil criteria.
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• Hydrology
Hydrology within the project area appeared to be the result of hydro support by the
stream, and seasonal storm water runoff from onsite and adjacent properties; long and
short-term seasonal ponding and soil characteristics. The drainages coalesce in the
southwest corner and continues north to a large wetland complex. Stormwater surface
runoff through the overall project area was directed by topography to the north into the
wetland area.
• Vegetation
The primary plant community in the mixed forested portion of the property along the north
boundary of the house sites is dominated by trees: Fraxinus latifolia (Oregon ash), Alnus
rubra (Red alder), and a few Salix lasiandra (Pacific willow). This plant community was
identified as hydrophytic in character (i.e. typical of wetlands) in the areas identified as
wetlands in the west portion of the site.
The plant community outside the wetland area was identified as non-hydrophytic in
character (i.e. not typical of wetlands).
WETLAND AND STREAM DETERMINATION
Wetland determination was based on sample plots which contained hydrophytic
vegetation, hydric soils, and wetland hydrology in accordance with the CoE Manual and
the Wash. Manual. Based on these methods one wetland was identified within the project
area. Two areas were identified onsite to exhibit characteristics typical of a stream. One
area was identified onsite to exhibit characteristics typical of a pond.
WETLAND SIZE
(acre)
CITY OF
FEDERAL WAY
CATEGORY
WA WETLAND
RATING
SCORE
GENERAL
BUFFER WIDTH
Adjustment by
Function and
Land Use
Buffer
Total
A 18+ II 22 150 ft. 0 ft. 150 ft.
* Wetland size onsite – east, west & north boundary not defined, continues off site
Wetland A: This wetland is located throughout the site, with the south boundary cutting
across the site east to west and continues substantially offsite to the north, east, and west.
This wetland encompasses the northern portions of each parcel. Hydrology for this
wetland was provided by primarily by overbank flooding from the stream and seasonal
precipitation.
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The buffer for Wetland A has been cleared and landscaped to the wetland ed ge as part
of previous development.
Since this wetland scored 22 Points by WSWRS, this wetland appeared to meet the
criteria for designation as a City of Federal Way Category II (2) Wetland. General buffer
for a City of Federal Way Category II Wetland is 165 ft. The Wetland Buffer of this wetland
encompasses the entire site.
Stream A: Stream A is identified as a stream which originates south of the project site
and flows onsite from the south. This stream provides habitat for both anadromous and
resident fish species downstream of the site. No evidence of potential for fish habitat was
found for the portion of the stream on or near the site. This stream is designated as a
Type F water. Type F streams require a 100 ft. buffer from the stream edge [Ordinary
High-Water Mark]. Within the project site, the stream buffer is subsumed by the wetland
buffer. This feature is identified as Joes Creek with the City Permanent Identifier
#155182521
Stream B: Stream B is a stream which originates a short distance southwest of the
project site. This stream meets the criteria for designation as a Type N water. Type N
streams require a 65 ft. buffer from the stream edge [Ordinary High-Water Mark]. Within
the project site, the stream buffer is subsumed by the wetland buffer. This feature is
identified as Joes Creek with the City Permanent Identifier #155182521
Offsite Wetlands: Wetland A continues substantially offsite to the east, north, and west.
WETLAND FUNCTION AND VALUE ASSESSMENT
Wetlands are known to perform significant roles in the ecosystem, some of which are of
immediate value to society. These roles vary greatly with the size, type, hydrology,
vegetation, and location of wetland areas. Although the ecological functions performed
by these wetlands are complex, interrelated, and difficult to assess and quantify, methods
have been developed for the U.S. Army Corps of Engineers (FGDC, 2013). The functions
provided by wetlands include hydrologic support, shoreline protection, stormwater and
floodwater storage, water quality, groundwater recharge, and provision of wildlife habitat.
CATEGORIZATION BASED ON FUNCTIONS
The functions that a wetland performs are characterized by answering a series of
questions that note the presence, or absence, of ce rtain indicators. Indicators are easily
observed characteristics that are correlated with quantitative or qualitative observations
of a function (Hruby et al. 2000).
Depressional or Flats Wetlands
Potential to Improve Water Quality
Potential to Reduce Flooding and Stream Erosion
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Riverine and Freshwater, Tidal Fringe Wetlands
Potential to Improve Water Quality
Potential to Reduce Flooding and Stream Erosion
Opportunity to Reduce Flooding and Stream Erosion
Lake-fringe Wetlands
Potential to Improve Water Quality
Opportunity to Improve Water Quality
Potential to Reduce Shoreline Erosion
Opportunity to Protect Resources from Shoreline Erosion
Slope Wetlands
Potential to Improve Water Quality
Opportunity to Improve Water Quality
Potential to Reduce Flooding and Stream Erosion
Opportunity to Reduce Flooding and Erosion
Functions Related to Habitat for All Classes of Wetlands
Potential to Provide Habitat
Opportunity to Provide Habitat
Score and Category Based on Functions
Wetlands that are Category I based on functions need to score 23 points or more. Total
scores between 20-22 are Category II; 16-19 are Category III, and less than 19 are
Category IV.
SITE WETLAND VALUATION
The wetland areas identified within the overall project area were evaluated following the
functional value assessment process noted above.
As identified in this assessment Wetland A would be considered to have the overall
functional rating of Category 2.
• Water Quality Functions – 8 points
• Hydrologic Functions – 8 points
• Habitat Functions – 6 points
• TOTAL score for functions – 22 points
REGULATORY CONSIDERATION
The proposed alteration of lands defined by various federal, state, and local authority
rules and regulations as "wetlands" raises environmental concern s that are generally
addressed in the development review process. These concerns center on the
development's potential adverse impacts to the structure, function, value, and size of
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these "wetland" areas. Such adverse impacts may include a reduction in w ildlife habitats,
reduced surface water quality, reduced water retention, a reduced ground water recharge
rate, reduced plant species diversity, and the reduction in the function and value of other
associated wetland and non-wetland characteristics.
U.S. ARMY CORPS OF ENGINEERS - Section 404
Section 404 of the Clean Water Act (33 U.S.C. 1344) prohibits the discharge of dredged
or fill material into "Waters of the United States" without a permit from the Corps of
Engineers (Corps). The Corps has jurisdiction over freshwater systems waterward from
the ordinary high water line of a water body or waterward from the upland boundary of
the adjacent wetland. The definition of fill materials includes the replacement of aquatic
areas with dry land, grading which changes the surface contour of a wetland, and
mechanized land clearing in wetlands. For the purposes of Section 404 permitting the
Corps makes the final determination as to whether an area meets the wetland definition
and would be subject to regulation under the Corps program.
Currently the Corps has two specific types of permits which apply to wetland fill proposals.
These two types are a series of specific Nationwide Permits and the Individual Permit.
The Nationwide Permit process identifies specific categories of work that can be
undertaken following a set of specific conditions applicable to each Nationwide Permit
number.
The Corps requires an Individual Permit where a proposed activity within an identified
jurisdictional wetland area can not be authorized under one of the Nationwide Permits.
Within the Individual Permit process the Corps undertakes a much more in -depth review
of the proposed project and the proposed impacts. The Corps must evaluate whether the
benefits derived from the project outweigh the foreseeable environmental impacts of the
project's completion.
All projects that proceed forward using either one of the Nationwide Permits or the
Individual Permit process must also comply with the provisions of the Endangered
Species Act.
As defined by a recent U.S. Supreme Court decisions the Corps of Engineers does not
typically regulated “isolated” wetlands pursuant to Section 404 of the Clean Water Act.
Under this decision “isolated” wetlands do not exhibit a continuous surface water
connection to other, downstream aquatic system.
STATE OF WASHINGTON DEPARTMENT OF ECOLOGY
Proposed action undertaken through either of the Corps of Engineers processes
(Nationwide or Individual) are also subject to the provisions of the Washington State
Department of Ecology Section 401 Water Quality Certification Process. Projects that
may be exempt from Corps of Engineers Section 404 jurisdiction may still require review
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by the Washington State Department of Ecology to ensure consistency with State water
quality protection provisions.
CITY OF FEDERAL WAY
• 19.145.420 Wetland rating and buffers.
(1) Rating. Wetlands shall be rated according to the Washington Department of Ecology wetland
rating system, as set forth in the Washington State Wetland Rating System for Western
Washington – 2014 Update (Ecology Publication No. 14-06-029, or as revised and approved by
Ecology), which contains the definitions and methods for determining whether the criteria below
are met:
(a) Category I wetlands represent a unique or rare wetland type; are more sensitive to disturbance
than most wetlands; are relatively undisturbed and contain ecological attributes that are
impossible to replace within a human lifetime; or provide a high level of function. The following
types of wetlands are Category I:
(i) Wetlands of high conservation value that are identified by scientists of the Washington
Natural Heritage Program/Department of Natural Resources;
(ii) Bogs;
(iii) Wetlands with mature and old growth forests larger than one acre; and
(iv) Wetlands that perform functions at high levels (wetlands that score 23 points or more based
on functions).
(b) Category II wetlands are difficult, though not impossible, to replace, and provide high levels
of some functions. Category II wetlands are those wetlands that score between 20 and 22 points
based on functions.
(c) Category III wetlands are wetlands with a moderate level of functions that score between 16
and 19 points based on functions.
(d) Category IV wetlands are wetlands with the lowest level of functions (scoring less than 16
points based on functions) and are often heavily disturbed.
(2) Wetland buffers shall be measured perpendicular from the wetland boundary as delineated
and marked in the field. Buffer widths are established as follows in Table 1:
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Table 1
Wetland Category Buffer Width
(wetland scores 3-
5 habitat points)
Buffer Width
(wetland scores
6-7 habitat
points)
Buffer Width
(wetland scores
8-9 habitat
points)
Category I: Bogs and wetlands of high
conservation value
250 feet 250 feet 300 feet
Category I: Forested and based on
function score
100 feet 150 feet 300 feet
Category II 100 feet 150 feet 300 feet
Category III 80 feet 150 feet 300 feet
Category IV 50 feet 50 feet 50 feet
(3) No wetland buffer is required for those isolated wetlands 1,000 square feet or less in total
area.
(4) All compensatory mitigation sites shall have buffers consistent with the buffer requirements
of this section. Buffers shall be based on the expected or target category of the proposed wetland
mitigation site.
(5) Lighting shall be directed away from wetland buffers unless otherwise determined by the
director.
(6) All lots approved in a recorded subdivision or binding site plan that contain wetlands and
their associated buffer in a native growth protection easement or tract may be improved pursuant
to easement or tract boundaries established in the plat regardless of subsequent regulatory buffer
increases or natural migration.
(7) All wetland and wetland buffer boundaries shown on an approved use process decision
and/or building permit shall be honored regardless of subsequent regulatory buffer increases or
natural migration.
SELECTED DEVELOPMENT ACTION
As presently defined for the site the proposed action is to develop each of the three
parcels to single-family homesites in concurrence with City of Federal Way regulations.
The area is zoned residential. Each of the three parcels is tot ally encompassed by
wetlands, streams, and their buffers. To develop these sites impacts to the wetland and
stream buffers is required.
Impact Assessment
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The proposed onsite action selected focuses on the impact of site development activities
on the Critical Areas (wetland and buffer) on the site (See attachment 2).
Impact Area Analysis –
Area BUFFER Area Impacted
(square feet)
Mitigation
East Parcel 3,150 4,548
Central Parcel 2,800 3,211
West Parcel 3,250 2,025
TOTAL 9,200 9,784
Conceptual Mitigation Plan
The development scheme for these parcels relies on the mitigation sequence of
Avoidance, Minimization, Mitigation.
Single-family houses are the zoning for the site and are the least -impactful development
of the site which the zoning allows. The house sites are situated as close to the internal
access road, and each other as allowed by code. The clearing sizes are the minimum
possible for the development of the parcels. The houses are as far away from the wetland
and stream as the parcels allow. The houses sizes are in accord with those in the
neighborhood.
The wetland is heavily vegetated throughout, with the exception of the south end where
it abuts the proposed development area. This area, of 9,784 Sq. Ft. is proposed for a
mitigation planting. It appears to be the edge of the long -ago placed fill, and is dominated
by Reed canarygrass.
Vegetating this area will provide an inhibition of surface erosion into the wetland and
stream, and will provide an auditory and visual barrier between the development and the
wetland. This will protect the functions and values
Planting proposed:
9,784 sq. ft. x 0.012 = 118 trees, ½ to be conifers
9,784 sq. ft. x 0.028 = 275 shrubs
All disturbed areas reseeded with buffer emergent mix.
The mitigation area, and the wetland, will be fenced to inhibit access and no other action
planned for the area north of the silt & permanent fence.
A detailed mitigation Plan will follow City concurrence with the concept mitigation plan
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FIGURES
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REFERENCE LIST
Adamus, P.R., E.J. Clairain Jr., R.D. Smith, and R.E. Young. CoE. Wetland Evaluation
Technique (WET); Volume II: Methodology, Operational Draft Technical Report Y-87,
U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands
and Deepwater Habitats of the United States. Office of Biological Services, U.S. Fish
and Wildlife Service, U.S. Department of the Interior, FWS/OBS-79/31.
Environmental Laboratory. CoE. "Corps of Engineers Wetlands Delineation Manual,"
Technical Report Y-87-1, US Army Engineer Waterways Experiment Station, Vicksburg,
Miss.
Federal Geographic Data Committee. 2013. Classification of wetlands and deepwater
habitats of the United States. FGDC-STD-004-2013. Second Edition. Wetlands
Subcommittee, Federal Geographic Data Committee and U.S. Fish and Wildlife Service,
Washington, DC.
Hitchcock, C.L., A. Cronquist. 1977. Flora of the Pacific Northwest. University of
Washington Press. Seattle, Washington.
Reppert, R.T., W. Sigleo, E. Stakhiv, L. Messman, and C. Meyers. 1979. Wetland
Values - Concepts and Methods for Wetland Evaluation. Research Report 79 -R1, U.S.
Army Corps of Engineers, Institute for Water Resources, Fort Belvoir, Virginia.
U.S. Department of Agriculture, Soils Conservation Service. Soils Survey of King
County Area Washington, February 1979.
U.S. Army Corps of Engineers. 2010. Regional Supplement to the Corps of Engineers Wetland
Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0), ed. J. S.
Wakeley, R. W. Lichvar, and C. V. Noble. ERDC/EL TR-10-3. Vicksburg, MS: U.S. Army
Engineer Research and Development Center
Washington State Department of Ecology. 1997. Washington State Wetlands
Identification and Delineation Manual. Publication Number 96 -94.
Washington State Department of Fisheries, Catalog of Washington Streams and
Salmon Utilization, Volume 1., 1975
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ATTACHMENT 1 - WETLAND DELINEATION MAPS
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ATTACHMENT 2
Western Washington - Revised Washington State Wetland Rating System(WSWRS)
form
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ATTACHMENT 3 – Field Data Forms
Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China(Hong Kong), Esri Korea, Esri (Thailand), NGCC, (c) OpenStreetMap contributors, and the GIS UserCommunity
0 1,0 00 2,0 00500Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515October 28, 2020
Fig . 1P & M Development LLC SiteParcel #14210 39069, 1421039087, 1421039043 Site Vicinity
´
1 inch = 1 ,0 00 feet
Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN,and the GIS User Community
0 70 14035Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515October 28, 2020
Fig . 2P & M Development LLC SiteParcel #14210 39069, 1421039087, 1421039043 Existing Co ndition s
´
1 inch = 7 0 feet
PFO1C
PUBH
R4SBC
R4SBC
PEM1Cx
PEM1C
PFO1CPFO1C
Sources: Esri, HERE, Garmin, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN,GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), (c)OpenStreetMap contributors, and the GIS User Community
0 510 1,0 20255Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515October 28, 2020
Fig . 3P & M Development LLC SiteParcel #14210 39069, 1421039087, 1421039043 Nat'l Wetland Inventory Map
´
1 inch = 5 00 feet
14-21-3-4
14-21-3-327
14-21-3-58
14-21-3-4
Sources: Esri, HERE, Garmin, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN,GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), (c)OpenStreetMap contributors, and the GIS User Community
0 510 1,0 20255Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515October 28, 2020
Fig . 4P & M Development LLC SiteParcel #14210 39069, 1421039087, 1421039043 Fede ral Wa y Wetland & Stream Map
´
1 inch = 5 00 feet
AgC
AgD
InC
AgD
InC
AmB
RaC
AgB
AgB
Bh
Sources: Esri, HERE, Garmin, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN,GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), (c)OpenStreetMap contributors, and the GIS User Community
0 510 1,0 20255Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515October 28, 2020
Fig . 5P & M Development LLC SiteParcel #14210 39069, 1421039087, 1421039043 NRCS Soils Map
´
1 inch = 5 00 feet
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!!!!!100-FT. STREAM BUFFER BOUNDARY165-FT. WETLAND BUFFER BOUNDARYS5
S4
S 6
S 2S 1
A 3
A 2 A01
A8 S
A 7S
A6 S
SP 6U
SP 1U
S3 WL S
A5 +STRM
CL STREAM
CL STREAMCL STREAM
CL STREAM
CL STREAM
CL STREAM
CL STREAM
A9 WL END S
A4 + STREAM
0 70 14035Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515December 3, 2020
Att. 1HENRY SiteParcel #s 14 2103-9069, 9087, and 9043Critical Area s Designation MapFrom Su rve y
1 inch = 7 0 feet
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MITIGATION PLANTING AREA = 9,784 SQ. FT.
3,250 SqFt
3,150 SqFt2,800 SqFt
0 70 14035Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515December 3, 2020
Att. 1aHENRY SiteParcel #s 14 2103-9069, 9087, and 9043Project Imp acy & Mitigation Area MapFrom Su rve y
1 inch = 7 0 feet
´
Wetland name or number HENRY FedWay
Name of wetland (or ID #):Date of site visit:14-Oct-20
Rated by Trained by Ecology? Yes No Date of training 15-May
HGM Class used for rating Wetland has multiple HGM classes? Yes No
NOTE: Form is not complete with out the figures requested (figures can be combined ).
Source of base aerial photo/map
OVERALL WETLAND CATEGORY II (based on functions or special characteristics )
1. Category of wetland based on FUNCTIONS
Category I - Total score = 23 - 27 Score for each
X Category II - Total score = 20 - 22 function based
Category III - Total score = 16 - 19 on three
Category IV - Total score = 9 - 15 ratings
(order of ratings
is not
important )
M M 9 = H, H, H
H M 8 = H, H, M
M M Total 7 = H, H, L
7 = H, M, M
6 = H, M, L
6 = M, M, M
5 = H, L, L
5 = M, M, L
4 = M, L, L
3 = L, L, L
2. Category based on SPECIAL CHARACTERISTICS of wetland
XNone of the above
Coastal Lagoon
Interdunal
Value
Score Based on
Ratings 8 8 6 22
H
CHARACTERISTIC Category
Estuarine
Wetland of High Conservation Value
Bog
Mature Forest
Old Growth Forest
Depressional & Flats
RATING SUMMARY – Western Washington
List appropriate rating (H, M, L)
HydrologicImproving
Water Quality
MSite Potential
Landscape Potential
Habitat
H
FUNCTION
Wetland A
M Heckert
ESRI King County, Cty of Fed Way
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 1 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
Maps and Figures required to answer questions correctly for
Western Washington
Depressional Wetlands
Map of: Figure #
Cowardin plant classes R1
Hydroperiods R2
Location of outlet (can be added to map of hydroperiods )R2
Boundary of area within 150 ft of the wetland (can be added to another figure )R3
Map of the contributing basin R4
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Riverine Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Ponded depressions
Boundary of area within 150 ft of the wetland (can be added to another figure )
Plant cover of trees, shrubs, and herbaceous plants
Width of unit vs. width of stream (can be added to another figure )
Map of the contributing basin
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Lake Fringe Wetlands
Map of: Figure #
Cowardin plant classes
Plant cover of trees, shrubs, and herbaceous plants
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
Slope Wetlands
Map of: Figure #
Cowardin plant classes
Hydroperiods
Plant cover of dense trees, shrubs, and herbaceous plants
Plant cover of dense, rigid trees, shrubs, and herbaceous plants
(can be added to another figure )
Boundary of area within 150 ft of the wetland (can be added to another figure )
1 km Polygon: Area that extends 1 km from entire wetland edge - including
polygons for accessible habitat and undisturbed habitat
Screen capture of map of 303(d) listed waters in basin (from Ecology website)
Screen capture of list of TMDLs for WRIA in which unit is found (from web)
To answer questions:
D 1.3, H 1.1, H 1.4
D 1.4, H 1.2
D 1.1, D 4.1
D 2.2, D 5.2
D 4.3, D 5.3
H 2.1, H 2.2, H 2.3
D 3.1, D 3.2
D 3.3
To answer questions:
H 1.1, H 1.4
H 1.2
R 1.1
R 2.4
R 1.2, R 4.2
R 4.1
R 2.2, R 2.3, R 5.2
H 2.1, H 2.2, H 2.3
L 1.2
L 2.2
L 3.1, L 3.2
L 3.3
H 2.1, H 2.2, H 2.3
R 3.1
R 3.2, R 3.3
To answer questions:
L 1.1, L 4.1, H 1.1, H 1.4
S 3.1, S 3.2
S 3.3
S 4.1
S 2.1, S 5.1
To answer questions:
H 1.1, H 1.4
H 1.2
S 1.3
H 2.1, H 2.2, H 2.3
R4
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 2 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
For questions 1 -7, the criteria described must apply to the entire unit being rated.
1. Are the water levels in the entire unit usually controlled by tides except during floods?
NO - go to 2 YES - the wetland class is Tidal Fringe - go to 1.1
1.1 Is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
NO - Saltwater Tidal Fringe (Estuarine)YES - Freshwater Tidal Fringe
NO - go to 3 YES - The wetland class is Flats
If your wetland can be classified as a Flats wetland, use the form for Depressional wetlands.
3. Does the entire wetland unit meet all of the following criteria?
NO - go to 4 YES - The wetland class is Lake Fringe (Lacustrine Fringe)
4. Does the entire wetland unit meet all of the following criteria?
The wetland is on a slope (slope can be very gradual ),
The water leaves the wetland without being impounded.
NO - go to 5 YES - The wetland class is Slope
5. Does the entire wetland unit meet all of the following criteria?
The overbank flooding occurs at least once every 2 years.
NO - go to 6 YES - The wetland class is Riverine
NOTE: The Riverine unit can contain depressions that are filled with water when the river is not flooding.
If hydrologic criteria listed in each question do not apply to the entire unit being rated, you probably have a unit
with multiple HGM classes. In this case, identify which hydrologic criteria in questions 1 - 7 apply, and go to
Question 8.
At least 30% of the open water area is deeper than 6.6 ft (2 m).
HGM Classification of Wetland in Western Washington
If your wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. If it is
Saltwater Tidal Fringe it is an Estuarine wetland and is not scored. This method cannot be used to score functions for
estuarine wetlands.
The vegetated part of the wetland is on the shores of a body of permanent open water (without any
plants on the surface at any time of the year) at least 20 ac (8 ha) in size;
The water flows through the wetland in one direction (unidirectional) and usually comes from seeps.
It may flow subsurface, as sheetflow, or in a swale without distinct banks.
NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind
hummocks (depressions are usually <3 ft diameter and less than 1 ft deep).
The unit is in a valley, or stream channel, where it gets inundated by overbank flooding
from that stream or river,
2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it.
Groundwater and surface water runoff are NOT sources of water to the unit.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 3 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
NO - go to 7 YES - The wetland class is Depressional
NO - go to 8 YES - The wetland class is Depressional
NOTES and FIELD OBSERVATIONS:
Wetland
HENRY WL A Category II + 6 HABITAT POINTS = 150 feet Final Buffer
7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding?
The unit does not pond surface water more than a few inches. The unit seems to be maintained by high
groundwater in the area. The wetland may be ditched, but has no obvious natural outlet.
8. Your wetland unit seems to be difficult to classify and probably contains several different HGM classes. For
example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a
Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE
HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT
(make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for
the rating system if you have several HGM classes present within the wetland unit being scored.
6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at
some time during the year? This means that any outlet, if present, is higher than the interior of the wetland.
Riverine
Treat as
ESTUARINE
Slope + Lake Fringe
Depressional + Riverine along stream
within boundary of depression
Depressional + Lake Fringe
Riverine + Lake Fringe
NOTE: Use this table only if the class that is recommended in the second column represents 10% or more of
the total area of the wetland unit being rated. If the area of the HGM class listed in column 2 is less than 10%
of the unit; classify the wetland using the class that represents more than 90% of the total area.
HGM classes within the wetland unit
being rated
Slope + Riverine
Slope + Depressional
Depressional
Depressional
If you are still unable to determine which of the above criteria apply to your wetland, or if you have more than 2
HGM classes within a wetland boundary, classify the wetland as Depressional for the rating.
Salt Water Tidal Fringe and any other
class of freshwater wetland
HGM class to
use in rating
Riverine
Depressional
Lake Fringe
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 4 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
D 1.1. Characteristics of surface water outflows from the wetland:
points = 3
points = 2
points = 1
points = 1
Yes = 4 No = 0
Wetland has persistent, ungrazed, plants > 95% of area points = 5
Wetland has persistent, ungrazed, plants > ½ of area points = 3
Wetland has persistent, ungrazed plants > 1/10 of area points = 1
Wetland has persistent, ungrazed plants < 1/10 of area points = 0
D 1.4. Characteristics of seasonal ponding or inundation:
This is the area that is ponded for at least 2 months. See description in manual.
Area seasonally ponded is > ½ total area of wetland points = 4
Area seasonally ponded is > ¼ total area of wetland points = 2
Area seasonally ponded is < ¼ total area of wetland points = 0
Total for D 1 Add the points in the boxes above 10
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 2.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
Yes = 1 No = 0
D 2.3. Are there septic systems within 250 ft of the wetland?Yes = 1 No = 0 1
Source Yes = 1 No = 0
Total for D 2 Add the points in the boxes above 4
Rating of Landscape Potential If score is: 3 or 4 = H 1 or 2 = M 0 = L Record the rating on the first page
Yes = 1 No = 0
Yes = 1 No = 0
Yes = 2 No = 0
Total for D 3 Add the points in the boxes above 4
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
D 3.3. Has the site been identified in a watershed or local plan as important
for maintaining water quality (answer YES if there is a TMDL for the basin in which the
unit is found )?
D 1.2. The soil 2 in below the surface (or duff layer) is true clay or true organic (use NRCS
definitions ).
D 1.3. Characteristics and distribution of persistent plants (Emergent, Scrub-shrub, and/or Forested Cowardin
classes):
D 2.4. Are there other sources of pollutants coming into the wetland that are
not listed in questions D 2.1 - D 2.3?
D 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river,
lake, or marine water that is on the 303(d) list?
D 2.2. Is > 10% of the area within 150 ft of the wetland in land uses that
generate pollutants?
D 3.2. Is the wetland in a basin or sub-basin where an aquatic resource is on the 303(d) list?
D 3.0. Is the water quality improvement provided by the site valuable to society?
1
1
2
0
5
DEPRESSIONAL AND FLATS WETLANDS
1
1
Water Quality Functions - Indicators that the site functions to improve water quality
D 1.0. Does the site have the potential to improve water quality?
1
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet.
Wetland is a depression or flat depression (QUESTION 7 on key)
with no surface water leaving it (no outlet).
Wetland is a flat depression (QUESTION 7 on key), whose outlet is
a permanently flowing ditch.
4
D 2.0. Does the landscape have the potential to support the water quality function of the site?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 5 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
D 4.1. Characteristics of surface water outflows from the wetland:
points = 4
points = 2
points = 1
points = 0
Marks of ponding are 3 ft or more above the surface or bottom of outlet points = 7
Marks of ponding between 2 ft to < 3 ft from surface or bottom of outlet points = 5
Marks are at least 0.5 ft to < 2 ft from surface or bottom of outlet points = 3
The wetland is a “headwater” wetland points = 3
Wetland is flat but has small depressions on the surface that trap water points = 1
Marks of ponding less than 0.5 ft (6 in)points = 0
The area of the basin is less than 10 times the area of the unit points = 5
The area of the basin is 10 to 100 times the area of the unit points = 3
The area of the basin is more than 100 times the area of the unit points = 0
Entire wetland is in the Flats class points = 5
Total for D 4 Add the points in the boxes above 8
Rating of Site Potential If score is: 12 - 16 = H 6 - 11 = M 0 - 5 = L Record the rating on the first page
D 5.1. Does the wetland unit receive stormwater discharges?Yes = 1 No = 0 1
D 5.2. Is > 10% of the area within 150 ft of the wetland in land uses that generate excess runoff?
Yes = 1 No = 0
Yes = 1 No = 0
Total for D 5 Add the points in the boxes above 3
Rating of Landscape Potential If score is: 3 = H 1 or 2 = M 0 = L Record the rating on the first page
points = 2
points = 1
Flooding from groundwater is an issue in the sub-basin.points = 1
points = 0
There are no problems with flooding downstream of the wetland.points = 0
Yes = 2 No = 0
Total for D 6 Add the points in the boxes above 1
1
1
D 5.3. Is more than 25% of the contributing basin of the wetland covered with intensive human
land uses (residential at >1 residence/ac, urban, commercial, agriculture, etc.)?
The existing or potential outflow from the wetland is so constrained
by human or natural conditions that the water stored by the wetland
cannot reach areas that flood. Explain why
1
0
3
D 4.2. Depth of storage during wet periods: Estimate the height of ponding above the bottom of the outlet. For
wetlands with no outlet, measure from the surface of permanent water or if dry, the deepest part.
D 4.3. Contribution of the wetland to storage in the watershed: Estimate the ratio of the area of upstream basin
contributing surface water to the wetland to the area of the wetland unit itself.
D 6.1. The unit is in a landscape that has flooding problems. Choose the description that best matches conditions
around the wetland unit being rated. Do not add points. Choose the highest score if more than one condition is met.
D 6.2. Has the site been identified as important for flood storage or flood
conveyance in a regional flood control plan?
Hydrologic Functions - Indicators that the site functions to reduce flooding and stream degradation
D 4.0. Does the site have the potential to reduce flooding and erosion?
2
Wetland is a depression or flat depression with no surface water
leaving it (no outlet)
Wetland has an unconstricted, or slightly constricted, surface outlet
that is permanently flowing
Wetland has an intermittently flowing stream or ditch, OR highly
constricted permanently flowing outlet
Wetland is a flat depression (QUESTION 7 on key), whose outlet is
a permanently flowing ditch
3
D 5.0. Does the landscape have the potential to support hydrologic function of the site?
D 6.0. Are the hydrologic functions provided by the site valuable to society?
The wetland captures surface water that would otherwise flow down-gradient into areas
where flooding has damaged human or natural resources (e.g., houses or salmon redds):
Flooding occurs in a sub-basin that is immediately down-
gradient of unit.
Surface flooding problems are in a sub-basin farther down-
gradient.
DEPRESSIONAL AND FLATS WETLANDS
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 6 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
Rating of Value If score is: 2 - 4 = H 1 = M 0 = L Record the rating on the first page
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 7 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
HABITAT FUNCTIONS - Indicators that site functions to provide important habitat
H 1.0. Does the site have the potential to provide habitat?
Aquatic bed 4 structures or more: points = 4
Emergent 3 structures: points = 2
Scrub-shrub (areas where shrubs have > 30% cover)2 structures: points - 1
Forested (areas where trees have > 30% cover)1 structure: points = 0
If the unit has a Forested class, check if :
H 1.2. Hydroperiods
Permanently flooded or inundated 4 or more types present: points = 3
Seasonally flooded or inundated 3 types present: points = 2
Occasionally flooded or inundated 2 types present: points = 1
Saturated only 1 types present: points = 0
Permanently flowing stream or river in, or adjacent to, the wetland
Seasonally flowing stream in, or adjacent to, the wetland
Lake Fringe wetland 2 points
Freshwater tidal wetland 2 points
H 1.3. Richness of plant species
If you counted:> 19 species points = 2
5 - 19 species points = 1
< 5 species points = 0
H 1.4. Interspersion of habitats
None = 0 points Low = 1 point Moderate = 2 points
All three diagrams
in this row are
HIGH = 3 points
2
Check the types of water regimes (hydroperiods) present within the wetland. The water regime
has to cover more than 10% of the wetland or ¼ ac to count (see text for descriptions of hydroperiods ).
2
Count the number of plant species in the wetland that cover at least 10 ft2.
Different patches of the same species can be combined to meet the size threshold and you do
not have to name the species. Do not include Eurasian milfoil, reed canarygrass, purple loosestrife,
Canadian thistle 2
Decide from the diagrams below whether interspersion among Cowardin plants classes
(described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats)
is high, moderate, low, or none. If you have four or more plant classes or three classes and open
water, the rating is always high.
These questions apply to wetlands of all HGM classes.
The Forested class has 3 out of 5 strata (canopy, sub-canopy, shrubs, herbaceous,
moss/ground-cover) that each cover 20% within the Forested polygon
2
H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the
Forested class. Check the Cowardin plant classes in the wetland. Up to 10 patches may be
combined for each class to meet the threshold of ¼ ac or more than 10% of the unit if it is smaller
than 2.5 ac. Add the number of structures checked.
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 8 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
H 1.5. Special habitat features:
Large, downed, woody debris within the wetland (> 4 in diameter and 6 ft long)
Standing snags (dbh > 4 in) within the wetland
Total for H 1 Add the points in the boxes above 11
Rating of Site Potential If Score is: 15 - 18 = H 7 - 14 = M 0 - 6 = L Record the rating on the first page
H 2.0. Does the landscape have the potential to support the habitat function of the site?
H 2.1 Accessible habitat (include only habitat that directly abuts wetland unit ).
Calculate:
10 % undisturbed habitat + (90 % moderate & low intensity land uses / 2 ) = 55%
If total accessible habitat is:
> 1/3 (33.3%) of 1 km Polygon points = 3
20 - 33% of 1 km Polygon points = 2
10 - 19% of 1 km Polygon points = 1
< 10 % of 1 km Polygon points = 0
H 2.2. Undisturbed habitat in 1 km Polygon around the wetland.
Calculate:
10 % undisturbed habitat + (20 % moderate & low intensity land uses / 2 ) = 20%
Undisturbed habitat > 50% of Polygon points = 3
Undisturbed habitat 10 - 50% and in 1-3 patches points = 2
Undisturbed habitat 10 - 50% and > 3 patches points = 1
Undisturbed habitat < 10% of 1 km Polygon points = 0
H 2.3 Land use intensity in 1 km Polygon: If
> 50% of 1 km Polygon is high intensity land use points = (-2)
≤ 50% of 1km Polygon is high intensity points = 0
Total for H 2 Add the points in the boxes above 3
Rating of Landscape Potential If Score is: 4 - 6 = H 1 - 3 = M < 1 = L Record the rating on the first page
Site meets ANY of the following criteria:points = 2
It has 3 or more priority habitats within 100 m (see next page)
It is mapped as a location for an individual WDFW priority species
Site has 1 or 2 priority habitats (listed on next page) with in 100m points = 1
Site does not meet any of the criteria above points = 0
Rating of Value If Score is: 2 = H 1 = M 0 = L Record the rating on the first page
Check the habitat features that are present in the wetland. The number of checks is the number of points.
It has been categorized as an important habitat site in a local or
regional comprehensive plan, in a Shoreline Master Plan, or in a
watershed plan
Undercut banks are present for at least 6.6 ft (2 m) and/or overhanging plants extends at least
3.3 ft (1 m) over a stream (or ditch) in, or contiguous with the wetland, for at least 33 ft (10 m)
Stable steep banks of fine material that might be used by beaver or muskrat for denning
(> 30 degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that
have not yet weathered where wood is exposed )
At least ¼ ac of thin-stemmed persistent plants or woody branches are present in areas
that are permanently or seasonally inundated (structures for egg-laying by amphibians )
3
It is a Wetland of High Conservation Value as determined by the
Department of Natural Resources
1
Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H
1.1 for list of strata )
3
2
-2
H 3.0. Is the habitat provided by the site valuable to society?
H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only
the highest score that applies to the wetland being rated .
It provides habitat for Threatened or Endangered species (any plant
or animal on the state or federal lists)
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 9 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha).
Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock.
Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation.
Priority habitats listed by WDFW (see complete descriptions of WDFW priority habitats, and the counties in which they can be
found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List. Olympia, Washington. 177 pp.
Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy coverage of the oak
component is important (full descriptions in WDFW PHS report p. 158 – see web link above ).
Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic and terrestrial
ecosystems which mutually influence each other.
Westside Prairies: Herbaceous, non-forested plant communities that can either take the form of a dry prairie or a wet
prairie (full descriptions in WDFW PHS report p. 161 – see web link above ).
Instream: The combination of physical, biological, and chemical processes and conditions that interact to provide
functional life history requirements for instream fish and wildlife resources.
Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open
Coast Nearshore, and Puget Sound Nearshore. (full descriptions of habitats and the definition of
relatively undisturbed are in WDFW report – see web link on previous page).
Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay
characteristics to enable cavity excavation/use by wildlife. Priority snags have a diameter at breast
height of > 20 in (51 cm) in western Washington and are > 6.5 ft (2 m) in height. Priority logs are > 12
in (30 cm) in diameter at the largest end, and > 20 ft (6 m) long.
Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), composed of basalt, andesite,
and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs.
Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth in soils, rock, ice,
or other geological formations and is large enough to contain a human.
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are addressed
elsewhere.
WDFW Priority Habitats
Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE : This
question is independent of the land use between the wetland unit and the priority habitat.
Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish and
wildlife (full descriptions in WDFW PHS report ).
Old-growth/Mature forests: Old-growth west of Cascade crest – Stands of at least 2 tree species,
forming a multi-layered canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha)
> 32 in (81 cm) dbh or > 200 years of age. Mature forests – Stands with average diameters
exceeding 21 in (53 cm) dbh; crown cover may be less than 100%; decay, decadence, numbers of
snags, and quantity of large downed material is generally less than that found in old-growth; 80-200
years old west of the Cascade crest.
http://wdfw.wa.gov/publications/00165/wdfw00165.pdf or access the list from here:
http://wdfw.wa.gov/conservation/phs/list/
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 10 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 11 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
Wetland Type Category
Check off any criteria that apply to the wetland. List the category when the appropriate criteria are met.
SC 1.0. Estuarine Wetlands
Does the wetland meet the following criteria for Estuarine wetlands?
The dominant water regime is tidal,
Vegetated, and
With a salinity greater than 0.5 ppt
Yes - Go to SC 1.1 No = Not an estuarine wetland
SC 1.1.
Yes = Category I No - Go to SC 1.2
SC 1.2.Is the wetland unit at least 1 ac in size and meets at least two of the following three conditions?
Yes = Category I No = Category II
SC 2.0. Wetlands of High Conservation Value (WHCV)
SC 2.1.
Yes - Go to SC 2.2 No - Go to SC 2.3
SC 2.2.Is the wetland listed on the WDNR database as a Wetland of High Conservation Value?
Yes = Category I No = Not WHCV
SC 2.3.Is the wetland in a Section/Township/Range that contains a Natural Heritage wetland?
http://www1.dnr.wa.gov/nhp/refdesk/datasearch/wnhpwetlands.pdf
Yes - Contact WNHP/WDNR and to SC 2.4 No = Not WHCV
SC 2.4.
Yes = Category I No = Not WHCV
SC 3.0. Bogs
SC 3.1.
Yes - Go to SC 3.3 No - Go to SC 3.2
SC 3.2.
Yes - Go to SC 3.3 No = Is not a bog
SC 3.3.
Yes = Is a Category I bog No - Go to SC 3.4
SC 3.4.
Yes = Is a Category I bog No = Is not a bog
NOTE: If you are uncertain about the extent of mosses in the understory, you may
substitute that criterion by measuring the pH of the water that seeps into a hole dug at
least 16 in deep. If the pH is less than 5.0 and the plant species in Table 4 are present,
the wetland is a bog.
Is an area with peats or mucks forested (> 30% cover) with Sitka spruce, subalpine fir,
western red cedar, western hemlock, lodgepole pine, quaking aspen, Engelmann
spruce, or western white pine, AND any of the species (or combination of species) listed
in Table 4 provide more than 30% of the cover under the canopy?
CATEGORIZATION BASED ON SPECIAL CHARACTERISTICS
Is the wetland within a National Wildlife Refuge, National Park, National Estuary
Reserve, Natural Area Preserve, State Park or Educational, Environmental, or Scientific
Reserve designated under WAC 332-30-151?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing,
and has less than 10% cover of non-native plant species. (If non-native species are
Spartina , see page 25)
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
The wetland has at least two of the following features: tidal channels, depressions with
open water, or contiguous freshwater wetlands.
Has WDNR identified the wetland within the S/T/R as a Wetland of High Conservation
Value and listed it on their website?
Has the WA Department of Natural Resources updated their website to include the list
of Wetlands of High Conservation Value?
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation
in bogs? Use the key below. If you answer YES you will still need to rate the wetland based on its
functions .
Does an area within the wetland unit have organic soil horizons, either peats or mucks,
that compose 16 in or more of the first 32 in of the soil profile?
Does an area within the wetland unit have organic soils, either peats or mucks, that are
less than 16 in deep over bedrock, or an impermeable hardpan such as clay or volcanic
ash, or that are floating on top of a lake or pond?
Does an area with peats or mucks have more than 70% cover of mosses at ground
level, AND at least a 30% cover of plant species listed in Table 4?
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 12 WSDOT Adapted Form - March 2, 2015
Wetland name or number HENRY FedWay
SC 4.0. Forested Wetlands
Yes = Category I No = Not a forested wetland for this section
SC 5.0. Wetlands in Coastal Lagoons
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon?
Yes - Go to SC 5.1 No = Not a wetland in a coastal lagoon
SC 5.1. Does the wetland meet all of the following three conditions?
The wetland is larger than 1/10 ac (4350 ft2)
Yes = Category I No = Category II
SC 6.0. Interdunal Wetlands
In practical terms that means the following geographic areas:
Long Beach Peninsula: Lands west of SR 103
Grayland-Westport: Lands west of SR 105
Ocean Shores-Copalis: Lands west of SR 115 and SR 109
Yes - Go to SC 6.1 No = Not an interdunal wetland for rating
SC 6.1.
Yes = Category I No - Go to SC 6.2
SC 6.2.Is the wetland 1 ac or larger, or is it in a mosaic of wetlands that is 1 ac or larger?
Yes = Category II No - Go to SC 6.3
SC 6.3.
Yes = Category III No = Category IV
Category of wetland based on Special Characteristics
If you answered No for all types, enter “Not Applicable” on Summary Form
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing),
and has less than 20% cover of aggressive, opportunistic plant species (see list of
species on p. 100).
At least ¾ of the landward edge of the wetland has a 100 ft buffer of shrub, forest, or un-
grazed or un-mowed grassland.
Is the wetland west of the 1889 line (also called the Western Boundary of Upland
Ownership or WBUO)? If you answer yes you will still need to rate the wetland based on its
habitat functions.
Is the wetland 1 ac or larger and scores an 8 or 9 for the habitat functions on the form
(rates H,H,H or H,H,M for the three aspects of function)?
Is the unit between 0.1 and 1 ac, or is it in a mosaic of wetlands that is between 0.1 and
1 ac?
The wetland lies in a depression adjacent to marine waters that is wholly or partially
separated from marine waters by sandbanks, gravel banks, shingle, or, less frequently,
rocks
The lagoon in which the wetland is located contains ponded water that is saline or
brackish (> 0.5 ppt) during most of the year in at least a portion of the lagoon (needs to be
measured near the bottom )
Does the wetland have at least 1 contiguous acre of forest that meets one of these criteria for the
WA Department of Fish and Wildlife’s forests as priority habitats? If you answer YES you will still need
to rate the wetland based on its functions.
Old-growth forests (west of Cascade crest): Stands of at least two tree species, forming
a multi-layered canopy with occasional small openings; with at least 8 trees/ac (20
trees/ha) that are at least 200 years of age OR have a diameter at breast height (dbh)
of 32 in (81 cm) or more.
Mature forests (west of the Cascade Crest): Stands where the largest trees are 80- 200 years old OR the
species that make up the canopy have an average diameter (dbh) exceeding 21 in (53 cm).
Wetland Rating System for Western WA: 2014 Update
Rating Form - Effective January 1, 2015 13 WSDOT Adapted Form - March 2, 2015
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
WETLAND DETERMINATION DATA FORM – Western Mountains, Valleys, and Coast Region
Project/Site: HENRY FEDERAL WAY City/County: FEDERAL WAY/King Sampling Date:6/14/2020
Applicant/Owner: P & m Development State: WA Sampling Point: SP 1W
Investigator(s): M. HECKERT Section, Township, Range:
Landform (hillslope, terrace, etc.): flat Local relief (concave, convex, none): none Slope (%):
Subregion (LRR): Lat: Long: Datum:
Soil Map Unit Name: Alderwood NWI classification: PSSE
Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.)
Are Vegetation , Soil , or Hydrology significantly disturbed? Are “Normal Circumstances” present? Yes No
Are Vegetation , Soil , or Hydrology naturally problematic? (If needed, explain any answers in Remarks.)
SUMMARY OF FINDINGS – Attach site map showing sampling point locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes No
Hydric Soil Present? Yes No
Wetland Hydrology Present? Yes No
Is the Sampled Area
within a Wetland? Yes No
Remarks: WETLAND A south end
VEGETATION – Use scientific names of plants.
Absolute Dominant Indicator
Tree Stratum (Plot size: 10M) % Cover Species? Status
1.
2.
3.
4.
0 = Total Cover
Sapling/Shrub Stratum (Plot size: 10 m )
1. Spiraea douglasii 30 Y FACW
2.
3.
4.
5.
30 = Total Cover
Herb Stratum (Plot size: 10 m)
1. Ranunculus acris 20 y facw
2. Phalaris arundinacea 80 y facw
3.
4.
5.
6.
7.
8.
9.
10.
11.
100 = Total Cover
Woody Vine Stratum (Plot size: )
1.
2.
= Total Cover
% Bare Ground in Herb Stratum 0
Dominance Test worksheet:
Number of Dominant Species
That Are OBL, FACW, or FAC: 3 (A)
Total Number of Dominant
Species Across All Strata: 3 (B)
Percent of Dominant Species
That Are OBL, FACW, or FAC: 100% (A/B)
Prevalence Index worksheet:
Total % Cover of: Multiply by:
OBL species 0 x 1 = 0
FACW species 90 x 2 = 180
FAC species 0 x 3 = 0
FACU species 0 x 4 = 0
UPL species 0 x 5 = 0
Column Totals: 90 (A) 180 (B)
Prevalence Index = B/A = 2
Hydrophytic Vegetation Indicators:
Rapid Test for Hydrophytic Vegetation
Dominance Test is >50%
Prevalence Index is ≤3.01
Morphological Adaptations1 (Provide supporting
data in Remarks or on a separate sheet)
Wetland Non-Vascular Plants1
Problematic Hydrophytic Vegetation1 (Explain)
1Indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic.
Hydrophytic
Vegetation
Present? Yes No
Remarks: all reed
US Army Corps of Engineers Western Mountains, Valleys, and Coast – Version 2.0
SOIL
Sampling Point: SP 1W
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks
0-18 10/yr 2/1 100 loam
1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:
Histosol (A1) Sandy Redox (S5) 2 cm Muck (A10)
Histic Epipedon (A2) Stripped Matrix (S6) Red Parent Material (TF2)
Black Histic (A3) Loamy Mucky Mineral (F1) (except MLRA 1) Very Shallow Dark Surface (TF12)
Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) Other (Explain in Remarks)
Depleted Below Dark Surface (A11) Depleted Matrix (F3)
Thick Dark Surface (A12) Redox Dark Surface (F6) 3Indicators of hydrophytic vegetation and
Sandy Mucky Mineral (S1) Depleted Dark Surface (F7) wetland hydrology must be present,
Sandy Gleyed Matrix (S4) Redox Depressions (F8) unless disturbed or problematic.
Restrictive Layer (if present):
Type:________________________________
Depth (inches):________________________
Hydric Soil Present? Yes No
Remarks: appears to be at the edge of fill, South from here is fill upland, north is wetland
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (2 or more required)
Surface Water (A1) Water-Stained Leaves (B9) (except MLRA Water-Stained Leaves (B9) (MLRA 1, 2,
High Water Table (A2) 1, 2, 4A, and 4B) 4A, and 4B)
Saturation (A3) Salt Crust (B11) Drainage Patterns (B10)
Water Marks (B1) Aquatic Invertebrates (B13) Dry-Season Water Table (C2)
Sediment Deposits (B2) Hydrogen Sulfide Odor (C1) Saturation Visible on Aerial Imagery (C9)
Drift Deposits (B3) Oxidized Rhizospheres along Living Roots (C3) Geomorphic Position (D2)
Algal Mat or Crust (B4) Presence of Reduced Iron (C4) Shallow Aquitard (D3)
Iron Deposits (B5) Recent Iron Reduction in Tilled Soils (C6) FAC-Neutral Test (D5)
Surface Soil Cracks (B6) Stunted or Stressed Plants (D1) (LRR A) Raised Ant Mounds (D6) (LRR A)
Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) Frost-Heave Hummocks (D7)
Sparsely Vegetated Concave Surface (B8)
Field Observations:
Surface Water Present? Yes No Depth (inches): 0
Water Table Present? Yes No Depth (inches): 0
Saturation Present? Yes No Depth (inches): 0
(includes capillary fringe)
Wetland Hydrology Present? Yes No
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks: does meet wetland criteria
HENRY
Sources: Esri, HERE, Garmin, Intermap, increment P Corp., GEBCO, USGS,FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, EsriJapan, METI, Esri China (Hong Kong), (c) OpenStreetMap contributors, and
December 9, 2020
0 1 20.5Miles
K
AssessedWaters/Sediment
Water
Category 5 - 303d
Category 4C
Category 4B
Category 4A
Category 2
Category 1
Sediment
Category 5 - 303d
Category 4C
Category 4B
Category 4A
Category 2
Category 1
DISCLAIMER. This report includes information that the Washington Department of Fish and Wildlife (WDFW) maintains in a central computer database. It is not an attempt to provide you
with an official agency response as to the impacts of your project on fish and wildlife. This information only documents the location of fish and wildlife resources to the best of our knowledge.
It is not a complete inventory and it is important to note that fish and wildlife resources may occur in areas not currently known to WDFW biologists, or in areas for which comprehensive
surveys have not been conducted. Site specific surveys are frequently necesssary to rule out the presence of priority resources. Locations of fish and wildlife resources are subject to
variation caused by disturbance, changes in season and weather, and other factors. WDFW does not recommend using reports more than six months old.
Priority Habitats and Species on the Web
Buffer radius: 100 Feet
Report Date: 12/03/2020
The Priority Habitats and Species (PHS) datasets do not contain information for your project area. This does not mean that species
and habitats do not occur in your project area. PHS data, points, lines and polygons are mapped only when occurrences of these
species or habitats have been observed in the field. Unfortunately, we have not been able to comprehensively survey all sections in
the state and therefore, it is important to note that priority species and habitats may occur in areas not currently known to the
Department.
PHS Report https://geodataservices.wdfw.wa.gov/hp/phs/
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