10-104519CITY OF
U M R
November 23, 20 10
Jeff Wolf
City of Federal Way
33325 8h Avenue South
Federal Way, WA 98023
OWN-] VA 11RAW&U-T-Wr M.WniMM [M V=-T- -
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CITY HALL
33325 8th Avenue South
Mailing Address: PO Box 9718
Federal Way, WA 98063-9718
(253)835-7000
www. cityoffederalway. cam
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and streams on parcel numbers:
In addition to the wetland, streams across the parcels were also surveyed and investigated. The report
concludes that the streams identified as the "Bridges" streams numbered 1, 7, and 8 are major streams as
defined by FVVRC 19.05.130 "Major Streams." "Bridges" streams 2 — 6 and 9 are identified as minor
streams, also defined by FVvaC 19.05.130. The "Enticknap" streams I & 2 were categorized as major
streams. The city concurs with the reports findings.
T mimiurigs cl• I ---- TI-T]r 37=7=1,11cai ineillor, •.1 1 Mile feen acLIVpIel, Uy- U11
city, and have been entered into record for future uses. If you have any questions, please feel free to
contact me at 253-835-2622 or at david.lee@cityoffederalway.com. I
Sincerely,
David Lee
Associate Planner
Doc. La 56370
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Jeff Wolf
LANDAU
ASSOMTES
August 3, 2010
WETLAND AND STREAM INVESTIGATION AND DELINEATION
ENTICKNAP AND BRIDGES PROPERTIES r 1:E-DERAL \NAY
ft DERAL WAY, WASHINGTON civ ( CDs
rRODUCTION
At the request of the City of Federal Way (City), Landau Associates conducted wetland and
ain delineation on two properties consisting of five adjacent parcels (study area) located in Federal
The Enticknap property consists of three parcels; parcel #3221049141,
jy, Washington (Figure 1).
'•cel #3221049123, and parcel #2921049112 (collectively called Enticknap property), owned by Ruth
ticknap, located east of 8t" Avenue South and west of 12t" Avenue South. The Bridges property
insists of two parcels; parcel #2921049118 and parcel #2921049103 (collectively called Bridges
operty), owned by David Bridges, located east of 8"' Avenue South and west of 12 1h Avenue South.
wo additional adjacent parcels were investigated as part of the study area for stream and wetland
)ntinuity, and they include the Larson property which consists of parcel #3221049112 and the Gowers
roperty which consists of parcel #2921049113. This technical memorandum presents the results of the
ietland and stream delineations and is provided for use by the City to assess and document the condition
if the study area.
SITE DESCRIPTION
The subject properties are located within the Puyallup kite watershed (Water Resource
Inventory Area 10), Hylebos Creek basin in Township 21, Range 4 E, Section 29 and 32, and east of 81h
Avenue South, north of 372 d Way. The study area for the wetland and stream investigation consists of
the subject properties, plus the surrounding 200 ft which represents the maximum buffer width for critical
areas under the City of Federal Way Revised Code (FWRQ. The Enticknap property consists of 12 . .71
acres and the Bridges property consists of 17.22 acres in size. The bnllcKIIL'P P1 UPUI LY F1
of forested land and contains one man-made pond and the North fork of West Hylebos Creek (Hylebos
Creek) running through its northwestern section. The Bridges property primarily consists of herbaceous
and scrub -shrub vegetation with a large forested area located west immediately of 12th A.vepue South and
%,DL
contains two man-made ponds with Hylebos Creek running through the property. The Larson property
950 Pacific Avenue, Suite 515 - Tacoma, WA 98402 - (253) 926-2493 - fax (253) 926-2531 - www.landauinc-com
consists of mostly Previously cleared areas with Hylebos Creek running through a forest . I
its northeast comer. The Gowers property consists of a large emergent wetland with a m
Hylebos Creek through the central and southern portions.
METHODS
This section presents the methods used to delineate the wetlands and streams
properties. The extent of wetlands and streams off the subject properties was observed a
subject properties' boundaries. Estimation of the extent Of Offsite wetlands and streams wa
field observations and readily available public domain resources as described below.
BACKGROUND INFORMATION REVIEW
Landau Associates reviewed the following public domain- resources to determin
conditions and potential wetlands and streams within the study area:
• Aerial photographs from 1936 to 1997 (King County website 2009)
• Topographic map (USGS 1993; see Attachment A)
• National Wetlands Inventory maps (USFWS 1981 to present; see Attachment A)
Natural Resource Conservation Service (NRCS) Soil Survey (NRCS 2006 website,
dates; Attachment B.)
County and National Hydric Soils Lists (USDA, NRCS 2010)
StreamNet Interactive Mapping, including the Pacific Northwest Mapper (StreamNet we
a; various dates)
•WDNR Forest Practices Application Review System, Water Type Map (WDN web
2007)• R
Washington Department of Natural Resources (WDNR) Natural Heritage Prog (WD
website 2009) ri ram 1D
-6 City of Federal Way critical areas maps (City of Federal Way 2005)
0 City of Federal, Way riparian corridor property acquisitions and preliminary sire ara layout
map (City of Federal Way 2 010)
0 WSIYOT 1-5 SRI 8/SR 161 interchange improvement plants (WSDOT 2009)
0 King County Imap, Sensitive Areas Map set (King County website 2009).
813/10 Y:k2381057.030%MWeUand Enficknap-Bridgeqjm,doc
LANDAU ASSOCIATE$
2
and stream investigation on the Enticknap property on July 8, 2009; Landau Associates wetland
ecologists Perry Welch, PWS, and Jessica Stone conducted supplemental wetland and stream
investigations on.the Enticknap property on April 19, 2010 and wetland and stream investigations on the
Bridges property on May 12, 2010. All site visits were conducted within the official growing season
recognized by the Seattle District USACE (1994). The weather during the July 8, 2009 site
reconnaissance was sunny and 70 degrees, partly cloudy and 55 degrees during the April 19, 2010 site
visit, and 65 degrees and sunny during the May 12, 2010 site visit. Field investigation site photographs
The wetland investigation was conducted in accordance with the U.S. Army Corps of Engineers
(USACE) Wetland Delineation Manual (USACE 1987), the USACE Regional Guidance letter on the
1987 Manual (USACE 1994), the USACE Interim Regional Supplement to the Corps of Engineers
Welland Delineation Manual.- Western Mountains, Valleys, and Coast Region (USACE 2008) and the
Washington State Department of Ecology's (Ecology's) Washington State Wetlands Identification and
Delineation Manual (Ecology 1997). The USACE and Ecology recommend a preliminary data gathering
and synthesis of available background information, followed by a field investigation.
The delineation was conducted using the routine methodology, which includes a three -parameter
approach to determine the presence or absence of wetlands that requires evaluating vegetation, soil, and
hydrology (Table 1). Following this method, an area is determined to be wetland if all of the following
three criteria are met:
• The dominant vegetation is hydrophytic
• Soils are hydric
Data on vegetation, soils, and hydrology was recorded on data sheets (Attachment Q as sampling plots
(SPs) located in areas meeting the mandatory wetland criteria, and in nearby upland to determine
corresponding wetland/upland boundaries. The wetland boundaries were delineated using numbered
flagging. The boundaries of wetlands extending outside of the study were estimated based on views from
the study area and aerial photographs and/or other information from the background information review.
8/3/10 YA238\057.03MMefland Enticknap-Bridges�_tm.doc
0
Onsite Wetland
nsite Buffer
Major Streams
Minor Streams
Property
Property Size
Area
Area
Length
Length
Entickhap Property
12.70 acres
5.06 acres
4.71 acres
511 ft
76 ft
Bridges Property
17.29 acres
14.32 acres
2.90 acres
1,653 ft
1,266 ft
Total for Study Area
29.99 acres
19.38 acres
7.61 acres
2,164 ft
1,342 ft
A state-owned drainage easement (not mapped) is located east of Parcel #3221049123 on the
Enticknap property and intersects Bridges Stream I within a culvert at approximately the intersection of
the Enticknap and Bridges property parcels. A grate in the culvert (labeled as outfall from state drainage
structure on Figure 2) is located at the approximate intersection point. Based on conversations with City
staff, the drainage easement contains a pipe that discharges to Bridges Stream 1. The direction of water
ulow within the grate was not visible during the site visit, nor could field staff confirm that water was
-Wetailed data on vegetation, soil, and hydrology parameters was recorded at sample plots
throughout the subject properties. A summary of these parameters, as well as the classification, rating,
2nd buffer width for each wetland and stream within the study area are presented below. Sample plot data
1711MITM
(Cowardin/HGM classification) wetland. All three mandatory wetland criteria are satisfied for Wetland
(see Attachment C). Vegetation in Wetland A is diverse and includes tree, shrub, emergent, and aquati
bed vegetation layers. Typical dominant hydrophytic species include a canopy of red alder (,41nus rub
with western red cedar (Thuja plicata), shrub layer dominated by salmonberry (Rubus spectabilis), and
icrtctr Emergent and scrub -shrub vegetation include spirea (Spiraea douglasii), cattail (Typha latifolia), smal
fruit bulrush (Scripus microcarpus), and creeping buttercup (Ranunculus repens) (see dat,
additional species). Soils in Wetland A are indicated to be hydric based on hydric soils criteria such as
presence of redox dark surface (indicator F6), hydrogen sulfide (indicator A4) odors, and loamy mucky
mineral (indicator 171). Indicators of wetland hydrology include oxidized rhizospheres and saturated soil
and/ora high water table (standing water present at the time of all three field investigations). Wetland A
is a headwater wetland for Hylebos Creek and covers approximately 40 percent of the Enticknap property
and approximately 83 percent of the Bridges property. Wetland and wetland buffer coverage for each
parcel is shown on Table 2. Hydrology in Wetland A is sustained primarily by a high groundwater table,
8/3/10 Y:\238\057.030\R\WetiandEnticknap-Bridges tm.doc LANDAu AssOCIATES
but also receives hydrology from hillside springs, precipitation, and overbank flooding from the ponds
-- and riverine systems. The Enticknap, pond located within Wetland A was apparently excavated in the
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excavated sometime between 1960 and 1969 based on aefial photographs (Landau Associates 2009).
Beaver activity is also present on the Enticknap, pond and both Bridges ponds.
Wetland A is rated as a Category 2 wetland under the Ecology wetland rating system (see
Attachment D) and as a Category I wetland under the FWRC. Under the FWRC a wetland is rated as a
I "VIIA] +r f4iderf--r-1
salmon, a federal species of concern, and steelhead, a federally threatened species, have been sited in
Hylebos Creek (StreamNet website a, various dates) (WDFW website 2009) (Appleton, W., 2009,
Personal Communication). Hylebos Creek runs directly through Wetland A on the Bridges property
(Parcel #2921049118) and through the northwest comer of the Enticknap property (Parcel #3221049141).
Additionally, Bridges Streams 1, 7 and 8 and Enticknap Streams I and 2 are major fish -bearing streams
that connect to Hylebos Creek. Wetland A contributes to stream health and habitat by shading of the7
creeks, contribution of woody debris, and nutrient cycling. The FWRC requires a 200-ft standard buffer
width for Category I wetlands. The wetland, streams, and buffer areas within the subject properties are
shown on Figure 2.
Hylebos Waterway, which drains into Commencement Bay in Tacoma. From its headwaters in Federal
Way, West Hylebos Creek flows into the Bridges property (parcel #2921049118) from the north, and
flows to the, south through the center of the parcel and into the northeast comer of the Enticknap property
(parcel # 3221049141) where it then flows to the northwest back into the Bridges property. It then flows
to the west and under 8"' Avenue South. Within the study area, Hylebos Creek receives water from
Wetland A and from Bridges Streams 1, 5, 7, 8 and 9, and the Gowers Stream. At the time of the field
investigation, water depth in the channel within the study area ranged from 4 to 15 inches and was
flowing south and then west. Channel bank -fall width ranges from 6 to 10 ft. Substrate is composed of
silt, gravel and fine to medium sand. Riparian vegetation consists of tree, shrub, and emergent wetland
species.
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8/3/10 YA238\057.030\IRMetland Enticknap-Bridgesjm.doc LANDAU ASSOCIATES
7
10,
to Hylebos Creek. Bridges Stream I receives water from springs flowing from the hillside along the
eastern edge of Wetland A, as well as Bridges Streams 2 and 3, and Enticknap Streams I and 2 and
possibly from an outfall maintained by the State of Washington. At the time of the field investigation,
water depth in the channel within the study area ranged from 2 to 4 inches and was flowing west.
Channel bank -fall width ranges from 2 to 15 ft. The channel bank is typically less than 8 inches in
height. Substrate is composed of silt and fine to medium sand. Riparian vegetation consists of tree,
shrub, and emergent wetland species. Bridges Stream 1 shows up on 1936 aerial photograph though its
course appears to have been modified since that time (King County website 2009).
Bridges Stream 2 is an intermittent flowing minor tributary to Bridges Stream I which drains the
portion of Wetland A located on the Bridges property (Parcel #2921049103) and flows south to the
Enticknap property (Parcel # 2921049112) where it drains into Bridges Stream 1. At the time of the field
investigation, Bridges Stream 2 was approximately I ft wide and water depth ranged from 2 to 4 inches.
Substrate is composed of muck. Riparian vegetation consists of shrub and emergent wetland species.
Bridges Stream 3 is a short permanently flowing minor stream located entirely within Wetland A
on the Bridges property (Parcel #2921049118). At the time of the field investigation, Bridges Stream 3
Bridges Stream 4 is a permanently flowing minor stream located entirely within Wetland A on
the Bridges property. At the time of the field investigation, Bridges Stream 4 was approximately 3 ft
wide and water depth ranged from I to 2 inches. The stream begins near the northwest comer of Parcel
#2921049103 where it flows to the south and connects to the East Bridges Pond on Parcel #292104911 S.
111111 1111!' 1! ir 'IfIF 81PIN or qrr
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the Bridges property (Parcel #2921049118). At the time of the field investigation, Bridges Stream 5 was
approximately 2 ft wide with a water depth of 1.5 inches. The stream flows west through a short culvert
and then connects to Hylebos Creek. Substrate is composed of muck. Riparian vegetation consists of tree,
It,ridges Stream 6 is a permanently flowing minor stream located entirely within Wetland A on
the Bridges property (Parcel #2921049118). At the time of the field investigation, Bridges Stream 6 wM
approximately 2 ft wide with a water depth of 5 inches. The water source for Bridges Stream 6 is
artesian well. From the Well it flows approximately 100 ft west and into the West Bridges Pon
I'
Substrate is composed of muck. Riparian vegetation consists of tree, shrub, and emergent wetlal
9�
8010 YA238\057.030MWetland Enticknap-Bridgesim.doc
M
time of the field investigation, Bridges Stream 7 was approximately 6 ft wide with a water depth of 7
inches. Substrate is composed of muck. Riparian vegetation • of tree, shrub, and emergent
mm1 •-
Bridges Stream 8 is a permanently flowing major stream that is an outlet to the West Bridges
I I I I I I I I I I I•I I I F I • I I I I III
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of muck. Riparian vegetation consists of tree, shrub, and emergent wetland species.
the Bridges property (Parcel #2921049118). At the time of the field investigation, Bridges Stream 9 was
approximately 3 ft wide with a water depth of I inch. The stream begins at a hillside spring near the
eastern side of the Bridges property, and then flows to the east through a short culvert and then connects
to Hylebos Creek. Substrate is composed of silt. Riparian vegetation consists of tree, shrub, and emergent
wetland species.
the Enticknap property (Parcel #3221049123). At the time of the field investigation, Enticknap Stream I
was approximately 3 ft wide with a water depth of 4 inches. The stream forms the outlet to the Enticknap
Pond, where it flows north and becomes a tributary to Bridges Stream 1. Substrate is composed of silt.
Riparian vegetation consists of shrub and emergent wetland species. Juvenile coho salmon were observed
near the confluence • these waterways.
investigation, Enticknap Stream 2 was approximately 3 ft wide with a water depth of 2 to 4 inches. The
stream flows to the north and connects to Bridges Stream 1. Substrate is composed of muck. Riparian
With the exception of Hylebos Creek, the streams within the study area were most likely
constructed to drain and channel water out of Wetland A to allow for farming and livestock grazing. The
dreams were most likely excavated at the same time as the ponds. Based on historical aerial photographs,
IIIIII III Ji 1111111111 11011111 milioll,IIIII!IIII111 111111 IF I, ji Iiiii I 111 1 451, 1 1 "11
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1970. Discussion with the Enticknap property landowner (Enticknap, R., 2009, personal communication)
revealed that species of trout (likely to be resident cutthroat trout, (Oncorhynchus clarki)) are present
within the Enticknap pond in Wetland A (Parcels #2921049112 and 3221049123). Ruth Enticknap
813/10 YA238\057.030\IRMefland Entickinap-Bridgestim.doc
E
indicated they were not stocked, but instead migrated via Hylebos Creek and Bridges Stream 1 and
Enticknap Stream 1 into the pond. Since both of the Bridges ponds in Wetland A (Parcel #292104911-8)
are directly connected to Hylebos Creek through Bridges Stream 7 and Bridges Stream 8, it is assumed
that fish species are also present. Additionally, several species of salmon are reportedly present in
Hylebos Creek and its tributaries (StreamNet website a, various dates) (Appleton, W., 2009, Personal
Communication). Juvenile coho salmon were observed throughout Hylebos Creek in the spring of 2010,
as well as at the confluence of Enticknap Stream I and Bridges Stream 1. Landau Associates observed
resident cutthroat trout in Hylebos Creek during the May 12, 2010 field investigation. Although fish
presence was not identified at the time of the field investigations in Bridges Streams 1, 7, 8 and Enticknap
Streams I and 2, they are directly connected to Hylebos Creek, do not contain any fish barriers, and
contain fish habitat.
Therefore, Hylebos Creek, Bridges Streams 1, 7, 8 and Enticknap Streams I and 2 are considered
Type F, fish -bearing streams per DNR typing system and are classed as a "major streams" III the City
ity, classifies any, stream and its tributaries which contains or su _%orts- residentaLmigratory fish as
a major stream). Major streams require a 100-ft standard set -back, in accordance with the FWRC. Due to
their size or lack of fish habitat, Bridges Streams 2, 3, 4, 5, 6, 9 and the upper reach of Bridges Stream I
are not considered to contain any fish presence and are considered Type N, non -fish bearing streams per
DNR typing system and are classed as a "minor streams" by the City.
USE OF THIS TECHNICAL MEMORANDUM
The findings presented herein are based on our understanding of City of Federal Way Code, the
USACE and Ecology wetland delineation methodology, Ecology's
on our interpretation of the vegetative, soil, and hydrology conditions observed during the field
delineation. Within the limitations of scope, schedule, and budget, the findings presented in this technical
memorand. %re�%ared in accordat&nerallgj accteited. sensitive area investigation ymnQk-l!`,
and practices in this locality at the time the technical memorandum was prepared. We make no other
warranty, either express or implied.
7=7ation, CODICILS OnS, anu 77701171nenau. L I I ot lie CA',Itrcss
written consent of Landau Associates and/or the City. Further, the reuse of information, conclusions, and
recommendations provided herein for extensions of the project or for,any other project, without review
and authorization by Landau Associates, shall be at the user's sole risk.
Wetland areas delineated by Landau Associates are considered preliminary until the USACE
and/or local jurisdictional agencies validate the wetland boundaries. Because wetlands are dynamic
8/3/10 Y:\238\057.030\R\WetIand EnUcknap-Bridges_tm.doc LANDAU ASSOCIATES
Of
communities, wetland boundaries may change over time. The agencies typically recognize wetland
delineations for a period of five years following an approved jurisdictional determination. In addition,
changes in government code, regulations, and/or laws may occur that affect regulation of wetlands or
streams characterized herein.
Appleton, W., 8 October 2009. Personal communication (conversation with Jennifer Wynkoop and
Jessica Stone, Landau Associates, Inc., regarding fish presence in Hylebos Creek.) William Appleton,
City of Federal Way.
Brinson, M. 1993. Final Report: A Hydrogeomorphic Classification for Wetlands. Wetlands Resear6l.
Program Technical Report WRP-DE-4. East Carolina University, Biology Department. Greenville,
North Carolina. Prepared for U.S. Army Corps of Engineers. August.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and
Deepwater Habitats of the United States. Gove=ent Printing Office. Washington, D.C.
Ecology. 1997. Washington State Wetlands Identification and Delineation Manual. Publication No.
96-94. Washington State Department of Ecology. Olympia, Washington. March.
Enticknap, R. 13 , July 2009. Personal communication (conversation with Jessica Stone, Landau
Associates, Inc., regarding subject properties and property at 36817 12"' Avenue South). Ruth Enticknap,
Federal Way, A.
Federal Way, City of. 2010. Riparian Corridor Property Acquisitions Preliminary Stream Layout Map.
City of Federal Way, SWM division. Map date: May 11.
Federal Way, City of. 2005. City of Federal Way Stream Ratings. City of Federal Way, GIS Division.
Map date: January 2005.
FEMA website. 2009. Firmette. Federal Emergency Management Agency. Accessible from Map
Service Center. litti,,).j/iiisc,,feiiiii.Lyov/ix,,ebai)T)/"NNcs/stores/servlet/FemaWelcomeView?storeld=I 0001
Accessed January.
Greytag Macbeth. 1994. Munsell Soil Color Charts. New Windsor, New York.
Hruby, T. 2004. ' Washington State Wetland Rating System for Western Washington — Revised.
Publication No. 04-06-025. Washington State Department of Ecology. Olympia, Washington.
King County website. 2009. h King County iMAP. Accessed June 30,
2009.
NRCS. 2006. Field Indicators of Hydric Soils in the United States, Version 6.0. G.W. Hurt and L.M.
Vasilas (eds.). United States Department of Agriculture, Natural Resources Conservation Service 'in
8/3/10 YA238\057.03MMetland Enficknap-Bridgestm.doc
NJ
cooperation with the National Technical Committee for Hydric Soils. URL: ft2ftt
v6 0. df Accessed July 30, 2009.
Olson, P. and E. Stockdale. 2008. Determining the Ordinary High Water Mark on Streams in
Washington State. Draft. Publication No. 08-06-001. Washington State Department of Ecology. April.
Available at:
Reed, P.B., Jr. 1993. National List of Plant Species That Occur in Wetlands.- Northwest (Region 9).
Available at U.S. Fish and Wildlife Service Biol. Rep. 88
(26.9). Washington, D.C.
Reed, P.B., Jr. 1988. National List of Plant Species that Occur in Wetlands.- 1988 National Summary,
Available at http://www.fNvs.,--o_v/���iiwi/blia/listL8.htiial. U.S. Fish and Wildlife Service.
StrearnNet W ' ebsite a. Various dates. Pacific Northwest Mapped. URL: Available at:
http://map.strearxuiet.org/website/. Accessed February 9, 2009,
USACE. 2008. Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual. -
Western Mountains, Valleys, and. Coast Region. Technical Report ERDC/EL TR-08-13. U.S. Army
Corps of Engineer Research and Development Center Environmental Laboratory. Vicksburg,
Mississippi. April.
USACE. 1994. Washington Regional Guidance on the 1987 Wetland Delineation Manual. U.S. Army
Corps of Engineers, Seattle District Regulatory Branch. May 23.
USACE. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. U.S.
Army Corps of Engineers Waterways Experiment Station. Vicksburg, Mississippi. March.
USDA, NRCS. 2010. National Hydric Soils List. Available at
Accessed May 27, ,L— —_ L--� _
USDA, MRCS. 2006. Soil Survey Geographic Database. Available at lit t.p.�,,/st-.)ild,,itamail.nrcs.usda. ov/.
U.S. Department of Agriculture, Natural Resources Conservation Service. Ft. Worth, Texas.
USFWS. 1981 to present. National Wetlands Inventory Map. U.S. Fish and Wildlife Service. St.
Petersburg, Florida.
USGS. 1993. Quadrangle, Washington 7.5-Minute Series (Topographic). Scale 1:24,000. U.S,
Geological Survey. Denver, Colorado.
WDFW website. 2009. Species of Concern in Washington State. Available at
Washington Department of Fish and Wildlife. Accessed
October 7, 2009.
WDNRwebsite.2009. Washington Natural Heritage Program.
Washington Department of Natural Resources.
Accessed June 30, 2009,
WDNR. 2007. Forest Practices Application Review System, TVater Type Map. Available at
fittp-22 Accessed February 9, 2009.
8/3/10 YA2381057 030MWetland Enficknap-Sridges,_mdoc
IN
2007. StreamMet Interactive Mapper. Available at
htt ://ina .strean net.oT/Nvebsite, bluesnetsaa er/viewer.latzn. Accessed February 9, 2009..
SOT. 2009. I-5 S18/SR161 hnterchainge Improvements. Sheet EV2, 295 of 491. February 10.
Attachments: Figure 1 — Vicinity Map
Figure 2 — Site Plan
Table 1 — Methods for Wetland Determination
Table 2 — Wetland and Stream Descriptions
Table 3 — Wetland, Stream and Buffer Coverage
Attachment A — Background Information
Attachment B — Soils Series Descriptions
Attachment C — Wetland Data Sheets
Attachment D — Wetland Rating Forms
Attachment E — Site Photographs
813110 YA238\057.03MR\Wetland Enticknap-Bridges_tm.doc LANDAU AssOCIATE$
13
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ASSOCIATES
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(Enticknap and Bridges Properties)
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USDA Natural Resources Web Soil Survey 5/27/201#
Ilia conservation service National Cooperative Soil Survey Page 1 of 3
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Soil Map —King County Area, Washington Enticknap and Bridges Properties
Map Unit Legend
King County Area, Washington (WA633)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
AgC Alderwood gravelly sandy loam, 6 to 15 9.5 25.3%
percent slopes
Bh Bellingham silt loam 2.7 7.3%
EvC Everett gravelly sandy loam, 5 to 15 percent 6.1 16.1%
slopes
Sm Shalcar muck 0.5 1.4%
So Snohomish silt loam 4.7 12.5%
Tu Tukwila muck 14.1 37.4%'.
Totals for Area of Interest 37.7 100.0%
usUA Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 3 of 3
Map Unit Description: Tukwila muck —King County Area, Washington
Landform: Depressions
VMT
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
Enticknap and Bridges Properties
I usoa Natural Resources Web Soil Survey 5127/2010
Conservation Service National Cooperative Soil Survey Page 2 of 2
Soil Map —King County Area, Washington
Enticknap and Bridges Properties
Map Unit Legend
King County Area, Washington (WA633)
Map Unit Symbol Map Unit Name Acres in A01
Percent of AN
AgC
Alderwood gravelly sandy loam, 6 to 15
9.5I
25.3%
percent slopes
Bh
Bellingham silt loam
2.7
7.3%
EvC
Everett gravelly sandy loam, 5 to 15 percent
6.1
6.1
16.1%
slopes
Sm
Shalcar muck
0.5
1.4%
So
Snohomish silt loam
4.7
12.5%
Tu
Tukwila muck
14.1
37.4%
Totals for Area of Interest
737.7]
100.0%
Natural Resources Web Soil Survey 512712010
Conservation Service National Cooperative Soil Survey Page 3 of 3
Map Unit Description: Alderwood gravelly sandy loam, 6 to 15 percent slopes —
King County Area, Washington
• • l['. • •
Map Unit Setting
Elevation: 50 to 800 feet
Mean annual precipitation: 25 to 60 inches
Mean'annual air temperature: 48 to 52 degrees F
Frost -free period. 180 to 220 days
Map Unit Composition
Alderwood and similar soils: 95 percent
Minor components: 5 percent
Description of Alderwood
Setting
Landform: Moraines, till plains
Parent material: Basal till with some volcanic ash
Enticknap and Bridges Properties
Properties and qualities
Slope: 6 to 15 percent
Depth to restrictive feature: 24 to 40 inches to dense material
Drainage class: Moderately well drained
Capacity of the most limiting layer to transmit water (Ksat): Very low
to moderately low (0.00 to 0.06 in/hr)
Depth to water table: About 18 to 37 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity. Very low (about 2.5 inches)
Interpretive groups
Land capability (nonirrigated): 4s
Typical profile
0 to 12 inches: Gravelly sandy loam
12 to 27 inches: Very gravelly sandy loam
27 to 60 inches: Very gravelly sandy loam
Minor Components
Norma
Percent of map unit. 1 percent
Landform: Depressions
Bellingham
Percent of map unit: 1 percent
Landform: Depressions
Seattle
Percent of map unit: 1 percent
Landform: Depressions
Tukwila
Percent of map unit. 1 percent
USDA Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 1 of 2
Map Unit Description: Alderwood gravelly sandy loam, 6 to 15 percent slopes —
King County Area, Washington
Landform: Depressions
Shalcar
Percent of map unit. 1 percent
Landform: Depressions
Data Source Information
S-1111mrm
Enticknap and Bridges Properties
0
IQNatural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 2 of 2
Map Unit Description: Bellingham silt loam —King County Area, Washington
Map Unit Setting
Mean annual precipitation: 35 to 60 inches
Mean annual air temperature: 50 degrees F
Frost -free period. 150 to 210 days
Map Unit Composition
Bellingham and similar soils: 85 percent
Minor components: 15 percent
Description of Bellingham
Setting
Landform: Depressions, drainageways
Parent material: Alluvium
Enticknap and Bridges Properties
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately low to moderately high (0.06 to 0.20 inihr)
Depth to water table: About 0 to 12 inches .
Frequency of flooding: None
Frequency of ponding: None
Available water capacity. Very high (about 12.6 inches)
Interpretive groups
Land capability (nonirrigated): 5w
Typical profile
0 to 11 inches: Silt loam
11 to 60 inches: Silty clay loam
Minor Components
Seattle
Percent of map unit.- 5 percent
Landform: Depressions
Alderwood
Percent of map unit. 5 percent
Everett
Percent of map unit.- 5 percent
Soil Survey Area: King County Area, Washington
Surrey Area Data: Version 6, Sep 22, 2009
Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 1 of 1
Map Unit Description: Everett gravelly sandy loam, 5 to 15 percent slopes —King Enticknap and Bridges Properties
County Area, Washington
Eli
Map Unit Setting
Mean annual precipitation: 30 to 45 inches
Mean annual air temperature: 50 degrees F
Frost -free period: 180 days
Map Unit Composition
Everett and similar soils: 100 percent
•
Setting
Landform: Terraces
Parent material: Glacial outwash with a component of volcanic ash in
the upper part
Properties and qualities
Slope: 5 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Somewhat excessively drained
Capacityof the most limiting layerto transmit water (Ksat): High(1.98
to 5.95 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Low (about 5.0 inches)
Interpretive groups
Land capability (nonirrigated): 3e
Typical profile
0 to 17 inches: Gravelly sandy loam
17 to 32 inches: Very gravelly sandy loam
32 to 60 inches: Very gravelly coarse sand
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
USDA Natural Resources Web Soil Survey 5/27/2010
am Conservation Service National Cooperative Soil Surrey Page 1 of 1
Map Unit Description: Snohomish silt loam —King County Area, Washington
Frequency of flooding: Frequent
Frequency of ponding: None
Available water capacity: Very low (about 1.6 inches)
Typical profile
0 to 7 inches: Silt loam
Minor Components
Seattle
Percent of map unit.- 2 percent
Landform: Depressions
Tukwila
Percent of map unit. 2 percent
Landform: Flood plains
Shalcar
Percent of map unit: 1 percent
Landform: Flood plains
Sultan
Percent of map unit. 1 percent
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
Enticknap and Bridges Properties
Natural Resources Web Soil Survey 5127/2010
Conservation Service National Cooperative Soil Survey Page 2 of 2
t
Map Unit Description: Tukwila muck —King County Area, Washington
Tu—Tukwila muck
Map Unit Setting
Elevation: 30 to 750 feet
Mean annual precipitation: 35 to 80 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period. 150 to 200 days
Map Unit Composition
Tukwila and similar soils: 80 percent
Minor components: 20 percent
Setting
Landform: Flood plains
Parent material. Herbaceous organic material
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Very poorly drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.57 to 1.98 in/hr)
Depth to water table: About 0 inches
Frequency of flooding: None
Frequency of ponding: Frequent
Available water capacity: Very high (about 24.1 inches)
Interpretive groups
Land capability (nonirrigated): 5w
Typical profile
0 to 19 inches: Muck
19 to 60 inches: Stratified diatomaceous earth to muck
Minor Components
Seattle
Percent of map unit: 15 percent
Landform: Depressions
Bellingham
Percent of map unit. 3 percent
Landform: Depressions
Norma
Percent of map unit. 2 percent
Enticknap and Bridges Properties
USDA Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey "Page 1 of 2
Map Unit Description: Tukwila muck —King County Area, Washington
Landform: Depressions
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
Enticknap and Bridges Properties
USDA Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 2 of 2
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ATTACHMENT C
WETLAND DETERM|NA/ION DATA FORM-WesternMountains,VaYleys,andCmast Region
Project/Site: snucxna
City/County: Fauom| Sampling Date: 7/8/09__,
Applicant/Owner: City of Federal Way
State: Washington Samplingpomt SPq___.`
mvouunamr(s): Jessica Stone, oau`amaxwen
ammonnTownump/nange: nscax T21w n04 E
Lanummn: depression Local Relief (conm,ms'convex, none)concave
a|ope%_~~_______
svureninn(Lnn)
Let:47.__Long 122oamm:____~~__~_.
Soil Map Unit Name: King County Area, Washington
wvwolaomncouun:
Are climatic/hydrologic conditions on the site typical for this time myear?
Yeu_X* mu(Explain inRemarks)
'
Are vegetation nvx or Hydrology significantly disturbed? Are circumstances ''womnory
Are vegetation aui| or Hydrology naturally problematic? (s�p|ammmmomsnn*ou�u�es X wv
Hydrophytic Vegetation Present? Yes X No
Is the sampled area within a wetland? |
Wetland Hydrology Present? Yes X No
Yes X No ,
Sampling Point: SP-1
SOIL
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix
Redox Features
(inches) (moist) %
Type'
Color (moist) % -
Loe Texture Remark
-
.Color
0-10 2.5Y 3/2 80
1 OYR 4/6 20 C
PL silt loam dry, crumbl)
10+ 2.5Y 3/2 50
10YR4/6... 30 C
- silt loam dry
2.5Y 8/1 20 D
-
D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grairitt-ocation: PL=Pore Lining, M=Matrix
Type: C= Concentration,
Hydric Soil Indicators: (Applicable to all LRR's, unless otherwise noted.)
Indicators for Problematic Hydric Sol
Histosol (Al)
Sandy Redox (S5)
2 cm Muck (At 0)
Histic Epipedon (A2)
Stripped Matrix (S6)
-Red Parent Material (TF2)
Black Histic (A3)
Loamy Mucky Mineral (FI) (exGepMLRAI) Other (Explain in Remarks)
Hydrogen Sulfide (A4)
Loamy Gleyed Matrix (F2)
Depleted Below Dark Surface (Al 1)
Depleted Matrix (F3)
Indicators of hydrophytic vegetat
Thick Dark Surface (Al2)
X Redox Dark Surface (F6)
and wetland hydrology must be pre
unless disturbed or problematic.
Sandy Mucky Mineral (Sl)
Depleted Dark Surface (F7)
Sandy Gleyed Matrix (S4)
Redox Depressions (F8)
Restrictive Layer (it present):
Hydric Soil Present?
Type:
Depth:
Yes X No
Remarks: Soits dry, moistened for color determination. Data iVo(satisfies 'h;7d;csoils criterion.
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that a2pLy)-
Secondary Indicators (2 or more required)
Water (Al)
Water -Stained Leaves (139)
Water -Stained Leaves (139)
-Surface
Water Table (A2)
(except MLRA 1, 2,4A and 4B)
(MLRA 1, 2,4A and 413)
-High
Saturation (A3)
Salt Crust (1311)
Drainage Patterns (1310)
Water Marks (131)
Aquatic Invertebrates (1313)
Dry -Season Water Table (C2)
Sediment Deposits (132)
Hydrogen Sulfide Odor (Cl)
-Saturation Visible on Aerial
Drift Deposits (133) X
Oxidized Rhizospheres along
Imagery (C9)
Algal Mat or Crust (134)
Living Roots (C3)
Geomorphic Position (D2)
Iron Deposits (135)
Presence of Reduced Iron (C4)
Shallow Aquitard (D3)
Surface Soil Cracks (136)
Iron Reduction in Tilled Soils (C6)
FAC-Neutral Test (D5)
-Recent
Inundation Visible on
Stunted or Stressed Plants (Dl) (-RR A)
Raised Ant Mounds (D6) QLRR A)
Aerial Imagery (137)
Other (Explain in Remarks)
Frost -Heave Hummocks (D7)
Sparsely Vegetated Concave Surface (138)
Field Observations:
Wetland Hydrology Present?
Surface Water Present? Yes - No
X Depth (inches)
Water Table Present? Yes No
X Depth (inches)
Yes X No
Saturation Present? Yes No
X Depth (inches)
(includes Capillary Fringe)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Inspections), if available.
Remarks: Data collected during mid -July during dry period, additional hydrology likely present earlier in season based on existing vegetation an
Data plot satisfies hydrology criterion based on presence of a primary indicator (C3).
11
M1
Landau Associates, Inc Western Mountains, Valleys, and Coast Region
WETLAND DETERMINA LION DATA FORM -Western Mountains, Valleys, and Coast Region
Project/Site: Enticknap Property City/County: Federal Way/King Sampling Date: 7/8/09
AppliGant/Owner: City of Federal Way State: Washington Sampling Point: SP-2
Investigator(s): Jessica Stone, Sacha Maxwell Section/Township/Range: Sec 32, T21 N , R04 E
Landform: depression Local Relief (concave, convex, none)roncave Slope% 8
Subregion(LRR): Northwest Forests and Coast (LRR A) Lat: 47 Long 122 Datum:
Soil Map Unit Name: King County Area, Washington NWI Classification:
Are climatic/hydrologic conditions on the site typical for this time of year? Yes X* No (Explain in Remarks)
Are vegetation - Soil - or Hydrology significantly disturbed? Are circumstances "Normal"?
Are vegetation -Soil or Hydrology naturally problematic? (Explain in remarks if needed)Yes X No
SUMMARY OF FINDINGS- Attach site map with sampling point locations, transects, and important figures
Hydrophytic Vegetation Present? Yes X No Is the sampled area within a wetland?
Hydric Soil Present? Yes X No
Weiland Hydrology Present? Yes X No I Yes X No
Remarks: Data plot satisfies all three mandatory wetland criterion. The data plot is classified as a PFO depressional wetland, *Very dry sump or
Absolute
Dominant
Indicator
Tree Stratum
%Cover
Species?
Status
(Plot Size 6 m
1 Alnus rubra
40
yes
FAC
2 Safix sitchensis
30
yes
FACW
3 Acercircinaturn
10
no
FAC
4
80 Total
Saolina/Shrub Stratum
(Plot Size 4.5 m
1 Spiraea douglasii
20
2 Rubus spectabilis
20
3 Malus fusca
15
4 Sambucus racemosa
10
5
65 Total
Herb Stratum
(Plot Size 3 m )
I Lysichiton ameticanum
40
2 Equisetum arvense
20
3 Athyrium fifix-fernina
10
4 Stachys charnissonis
10
5 Ranunculus repens
10
6
7
8
9
10
90 Total
Woody Vine Stratum
(Plot Size
1
2
Total
% Bare Ground in Herb Stratum 10
Remarks: Data plot satisfies hydrophytic vegetation criterion.
inance Test Worksheet:
)er of Dominant Species
are OBL, FACW, or FAC:
Number of Dominant
es Across All Strata:
7 1
Brit of Dominant Species
are OBL, FACW, or FAC: 100%
yes
FACW
yes
FAC
Prevalence Index Worksheet:
yes
FACW
Total % Cover of: Multiply by:
no
FACU
OBL Species 40 x 1 = 40
FACW Species 65 x 2 = 130
FAC Species 110 x 3 = 330
IFACU Species 10 x 4 = 40
iUPL Species x 5 =
yes
OBL
'Column Totals: 225 (A) 540 (B)
yes
FAC
no
FAC
Prevalence Index= B/A 2.4
no
NI
no
FAC
Hydrophytic Vegetation Indicators:
X Dominance Test is >50%
X Prevalence Index is<3.0'
Morphological Adaptationg
(Provide supporting data in Remarks)
Wetland Non -Vascular Plantd
Problematic Hydrophytic Vegetatioh (Explain)
"Indicators of hydric soil and wetland hydrology mus
The present, unless disturbed or problematic.
Hydrophytic Vegetation Present?
Yes X No
�
Sampling Point:
SP-2
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) % Type
LoO Texture Remarks
0-8 1 OYR 2/1 100
muck saturated
Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grain'tLocation: PL=Pore Lining, M=Matrix
Hydric Soil Indicators: (Applicable to all LRR's, unless otherwise noted.)
Indicators for Problematic Hydric Soils':
Histic Epipedon (A2)
Stripped Matrix (S6)
Red Parent Material (TF2)
Black Histic (A3)
Loamy Mucky Mineral (Fl) (excepMLRAl) —Other (Explain in Remarks)
Depleted Below Dark Surface (All)
Matrix (F3)
3 Indicators of hydrophytic vegetation
Thick Dark Surface (Al2)
—Depleted
Redox Dark Surface (F6)
and wetiand hydrology must be present,
unless disturbed or problematic.
Sandy Mucky Mineral (Sl)
Depleted Dark Surface (F7)
Restrictive Layer (if present):
Hydric Soil Present?
Depth:
Yes X No
Remarks, Data plot satisfies hydric soils criterion.
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply)
Secondary Indicators (2 or moreLeq!Lired)
Surface Water (Al)
Water -Stained Leaves (139)
Water -Stained Leaves (139)
High Water Table (A2)
(except MLRA 1, 2,4A and 4P
(MLRA 1, 2,4A and 413)
X Saturation (A3)
Salt Crust (B 11)
Drainage Patterns (1310)
Water Marks (131)
Aquatic Invertebrates (B 13)
Dry -Season Water Table (C2)
Sediment Deposits (132) X
Hydrogen Sulfide Odor (Cl)
—Saturation Visible on Aerial
Drift Deposits (133)
Oxidized Rhizospheres along
Imagery (C9)
Algal Mat or Crust (134)
Living Roots (C3)
Geomorphic Position (D2)
Iron Deposits (135)
Presence of Reduced Iron (C4)
Shallow Aquitard (D3)
Surface Soil Cracks (136) —Recent
Iron Reduction in Tilled Soils (C6)
FAC-Neutral Test (D5)
Inundation Visible on
Stunted or Stressed Plants (Dl) I_RR A)
— ----- ,--Raised Ant Mounds (D6) (LRR A)
Aerial Imagery (137)
Other (Explain in Remarks)
Frost -Heave Hummocks (D7)
Sparsely Vegetated Concave Surface (138)
Field Observations:
Wetland Hydrology Present?
Surface Water Present? Yes
X Depth (inches)
—No
Water Table Present? Yes No
X Depth (inches)
Yes X No
Saturation Present? Yes X No
Depth (inches) to surface
(includes Capillary Fringe) I
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections;
'
satisfies hydrology criterion.
Landau Associates, Inc Western Mountains, Valleys, and Coast Region
WETLAND DETERMINA I ION DATA FOR - Western Mountains, Valleys, and Coast Region
Project/Site: Enticknap Property
City/County: Federal Way/King Sampling Date: 7/8/09
Applicant/Owner: City of Federal Way _
State: Washington Sampling Point: SP-3
Investigator(s): Jessica Stone, Sacha Maxwell
Sectionrfownship/Range: Sec 32, T21 N, R04E
Landform: depression Local Relief (concave,
convex, none)concave Slope% 2
Subregion(LRR): Northwest Forests and Coast (LRR A)
Lat: 47 Long 122 Datum:
Soil Map Unit Name: King County Area, Washington
NWI Classification:
Are climaticthydrologic conditions on the site typical for this time of year? Yes X* No (Explain in Remarks)
Are vegetation Soil or Hydrology
significantly disturbed? Are circumstances "Normal"?
Are vegetation Soil or Hydrology
naturally problematic? (Explain in remarks if needed)Yes X No
SUMMARY OF FINDINGS- Attach site map with sampling point locations, transacts,, and important figures
Hydrophytic Vegetation Present? Yes X
No Is the sampled area within a wetland?
Hydric Soil Present? Yes X
No
Wetland Hydrology Present? Yes X
No Yes X No
Remarks: Data plot satisfies all three mandatory wetland criterion. The data plot is classified as a PEM depressional wetland. "Very dry
summer
I
VEGETATION- Use scientific names of plants.
Absolute
Dominant Indicator Dominance Test Worksheet:
Tree Stratum %Cover
Species? Status Number of Dominant Species
(Plot Size 6 m )
That are OBL, FACW, or FAC: 7
1 Salix lucida 15
yes NI
2
Total Number of Dominant
3
Species Across All Strata: 7
4
15 Total
Percent of Dominant Species
Sapling/Shrub Stratum
That are OBL, FACW, or FAC: 100%
(Plot Size 4.5 m )
1
2
Prevalence Index Worksheet:
3
Total % Cover of: Multiply by:
w�
4
'OBL Species
p s. 30 x 1 = 30
5
-
FACW Species 50 x 2 = 100
Total
FAC Species 6 x 3 = 18
Herb Stratum
!FACU Species 5 x 4 = 20
(Plot Size 3 m )
IUPL Species x 5 =
1 Ranunculus repens 50
yes FACW 'Column Totals: 91 (A) 168 (B)
2 Scirpus microcarpus 30
yes OBL
3 Rumex crispus 5
no FAC Prevalence Index= B/A 1.8
4 Cirsium arvense 5'
no FACU
5 Equisetum arvense 1
no FAC Hydrophytic Vegetation Indicators:
6
X Dominance Test is >50%
7
X Prevalence Index is<3.0'
8
Morphological Adaptations
9
(Provide supporting data in Remarks)
10
Wetland Non -Vascular Plants
91 Total
Problematic Hydrophytic Vegetatioh(Explain)
Woody Vine Stratum
(Plot Size )
'Indicators of hydric soil and wetland hydrology mus
1
Ibe present, unless disturbed or problematic.
2
IHydrophytic Vegetation Present?
Total
% Bare Ground in Herb Stratum
Yes X No
Q®.,,�.4c• Bata olot satisfies hvdronhvtic vegetation criterion.
'
Sampling Point: Sp-3
SOIL
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) % Type'
Loe Texture Remarks
Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grain'tLocation: PL=Pore Lining, M=Matrix
Hydric Soil Indicators: (Applicable to ail LRR's, unless otherwise noted.)
Indicators for Problematic Hydric Soilss:
Histic Epipedon (A2)
Stripped Matrix (S6)
Red Parent Material (TF2)
Black Histic (A3)
X Loamy Mucky Mineral (Fl) (excepMLRAI) Other (Explain in Remarks)
Hydrogen Sulfide (A4)
Loamy Gleyed Matrix (F2)
Depleted Below Dark Surface (Al 1)
Matrix (F3)
3 Indicators of hydrophytic vegetation
Thick Dark Surface (Al2)
-Depleted
Redox Dark Surface (F6)
and wetland hydrology must be present,
unless disturbed or problematic.
Sandy Mucky Mineral (Sl)
Depleted Dark Surface (F7)
Restrictive Layer (if present):
Hydric Soil Present?
Depth:
Yes X No
Remarks: Data plot satisfies hydric soils criterion.
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply)
Secondary Indicators (2 or more required)
Surface Water (Al)
Water -Stained Leaves (139)
Water -Stained Leaves (69)
• Saturation (A3)
Salt Crust (1311)
Drainage Patterns (1310)
Marks (B 1)
Aquatic Invertebrates (1313)
Dry -Season Water Table (C2)
-Water
Sediment Deposits (132)
Hydrogen Sulfide Odor (Cl)
Saturation Visible on Aerial
Drift Deposits (133)
Oxidized Rhizospheres along
Imagery (C9)
Algal Mat or Crust (134)
Living Roots (C3)
Geomorphic Position (D2)
Iron Deposits (135)
Presence of Reduced Iron (C4)
Shallow Aquitard (D3)
Surface Soil Cracks (136)
Recent Iron Reduction in Tilled Soils (C6)
FAC-Neutral Test (D5)
Visible on
Stunted or Stressed Plants (DI) (_RR A)
- Raised Ant Mounds (D6) (LRR A)
-Inundation -
Aerial Imagery (137)
Other (Explain in Remarks)
- Frost -Heave Hummocks (D7)
Sparsely Vegetated Concave Surface (138)
Field Observations:
Wetland Hydrology Present?
Surface Water Present? Yes No
X Depth (inches)
Water Table Present? Yes X No
Depth (inches) 18 in
Yes X No
Saturation Present? Yes X No
Depth (inches) to surface
(Includes Capillary Fringe)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspectic
Remarks: Data plot satisfies hydrology criterion.
Landau Associates, Inc Western Mountains, Valleys, and Coast Region
WETLAND DETERMINA i ION DATA FORM - Western Mountains, Valleys, and Coast Region
Project/Site: Enticknap Property City/County: Federal Way/King Sampling Date:
7/8/09
Applicant/Owner: City of Federal Way State: Washington Sampling Point:
SP-4
Investigator(s): Jessica Stone, Sacha Maxwell SectionfTownship/Range: Sec 32, T21 N, R04E
Landform: depression Local Relief (concave, convex, none)roncave Slope%
Subregion(LRR): Northwest Forests and Coast (LRR A) Lat: 47 Long 122 Datum:
Soil Map Unit Name: King County Area, Washington NWI Classification:
Are climatic/hydrologic conditions on the site typical for this time of year? Yes X* No (Explain in Remarks)
Are vegetation — Soil — or Hydrology significantly disturbed? Are circumstances "Normal"?
Are vegetation Soil or Hydrology naturally problematic? (Explain in remarks if needed)Yes X
No
SUMMARY OF FINDINGS- Attach site map with sampling point locations, transects, and important figures
Hydrophytic Vegetation Present? Yes No X Is the sampled area within a wetland?
Hydric Soil Present? Yes No X
Wetland Hydrology Present? Yes No Yes No X
Remarks: Data plot satisfies none of the three mandatory wetland criterion. The data plot is classified as upland.
*Very dry
summer
ygpy_x Alukffi.�_A�*Amke_TAWq5�_M J.
Tree Stratum
(Plot Size 6 m
1
2
3
Sapling/Shrub Stratum
(Plot Size 4.5 m
2
3
4
5
Herb Stratum
(Plot Size 3 m
1 Lolium perenne
2 Agrostis capillaris
3 Festuca arundinacea
4 Alopecurispratensis
5
6
7
8
9
10
Woody Vine Stratum
(Plot Size
1
2
% Bare Ground in Herb Stratum
Remarks: Data plot does not sat
Absolute
Dominant
Indicator
Dominance Test Worksheet:
%Cover
Species?
Status
Number of Dominant Species
That are OBL, FACW, or FAC: 0
Total Number of Dominant
Species Across All Strata: 0
Total
Percent of Dominant Species
'That are OBL, FACW, or FAC:
Prevalence Index Worksheet:
Total % Cover of: Multiply by:
OBL Species x 1
FACW Species x 2 =
Total
FAC Species 12 x 3 = 36
FACU Species 88 x 4 = 352
UPL Species x 5 =
88
ye>
FACU
Column Totals: 100 (A) 388 (B)
5
no
FAC
5<
no
FAC
Prevalence Index= B/A 3.9
2
no
FAC
Hydrophytic Vegetation Indicators:
Dominance Test is >50%
Prevalence Index is<3.0'
Morphological Adaptationt
(Provide supporting data in Remarks)
Wetland Non -Vascular Plants
100 Total
Problematic Hydrophytic Vegetatioh (Explain)
'Indicators of hydric soil and wetland hydrology mus
be present, unless disturbed or problematic.
!Hydrophytic Vegetation Present?
Total
Yes No X
vtic venetation criterion.
^ "
/
�
_,
Sampling Point: SP-4Histic
SOIL
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix
Redox Features
(inches) Color (moiat) %
Color (moist) % Type
Lod' Texture Remarks
Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grain'tLocation: PL=Pore Lining, M=Matrix
Hydric Soil Indicators: (Applicable to all LRR's, unless otherwise noted.)
Indicators for Problematic Hydric Soils3:
Epipedon (A2)
Stripped Matrix (S6)
-Red Parent Material (TF2)
Black Histic (A3)
Loamy Mucky Mineral (Fl) (excepMLRAl) Other (Explain in Remarks)
'
Hydrogen Sulfide (A4)
Loamy Gleyed Matrix (F2)
Depleted Below Dark Surface (Al 1)
Matrix (F3)
3 Indicators of hydrophytic vegetation
Thick Dark Surface (Al 2)
-Depleted
Redox Dark Surface (F6)
and wetland hydrology must be present,
unless disturbed or problematic.
Sandy Mucky Mineral (Sl)
-Depleted Dark Surface (F7)
-
Restrictive Layer (if present):
Hydric Soil Present?
Depth:
Yes No X
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required: check all that apply)
Secondary Indicators (2 or more required)
Surface Water (Al)
Water -Stained Leaves (139)
Water -Stained Leaves (139)
High Water Table (A2)
(except MLRA 1, 2,4A and 4P
(MLRA 1, 2,4A and 4B)
Saturation (A3)
Salt Crust (B1 1)
Drainage Patterns (1310)
Water Marks (131)
Aquatic Invertebrates (1313)
Dry -Season Water Table (C2)
Sediment Deposits (132)
Hydrogen Sulfide Odor (Cl)
Saturation Visible on Aerial
Drift Deposits (133)
Oxidized noizoopxemnalong
Imagery (.9) -
---x|ga|�mv,om�(�� ,
uvinonvvmVCo
aevmo�x�rownvn(ou) `
! ---
|mnoepvo|�(so)
p m�euuoou|mn(c�)
�sonoo
n�aummxnvi�m(ou)
_--- .�
� ---
avm�e�m|�mok �m) ~ ___neoen
ne �| neuu,monmTmeunoi|o(co}
nm
~_
�xcmouua|Tem(oo) |
----
0 mvnuanonvioim�on
suun�euo,sxmnoeup|an�(o1)�Rm/V
na|oeomn��uvnuu(oo)�mmx)
--_— .�A
; 1 1- . 'B71
Other (Explain in Remarks)
Frost -Heave Hummocks (D7)
Sparsely Vegetated Concave Surface (138)
Field Observations: Wetland Hydrology Present?
Surface Water Present? Yes -No X Depth (inches)
Water Table Present? Yes -No X Depth (inches) Yes No _X
Saturation Present? Yes -No X Depth (inches)
(Includes Capillary Fdnge)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous Inspections), if available:
|Remarks: Data plot does not satis;
Landau Associates, Inc VVmebann Mountains, Valleys, and Coast Region
WETLAND DETERM|NA/ION DATA FORM - Western Mountains, Valleys, and Coast Region
pnoj*cuuxe Bridges Property City/County: Federal
..
licant/Owner�Z; of Federal Way State: Washington Sampling Point: SP-5
Investigator(s): Perry Welch, Jessica Stone SectionfFownship/Range: Sec 32, T21 N, R04E
Landform: depression Local Relief (concave, convex, none)concave Slope% 0
Subregion(LRR): Northwest Forests and Coast (LRR A) Lat: 47 Long 122 Datum:
Soil Map Unit Name: King County Area, Washington NWI Classification:
Are climatic/hydrologic conditions on the site typical for this time of year? Yes X* No (Explain in Remarks)
Are"onetanvn ____mm ____orHrxmwny significantly disturbed? Are circumstances ^mnrmm|7
Are vegetation ani| or Hydrology naturally problematic? (Explain |nremarks nnooued)/oa _X�. wv__�,
SUMMARY OFFINDINGS- Attach site map with sampling pointlocations, important
Hydrophytic Vegetation Present? Yes X No Is the sampled area within a wetland?
Hydric Soil Pn Yes X n Wetland Hydrology Present? Yes X No Yes X No
Remarks: Data plot satisfies all three mandatory wetland parameters. The data plot is classified as a PEM depressional wetland.
Absolute
Dominant
Indicator
Dominance Test Worksheet:
Tree Stratum'
_%Cover�.
-Specie;?
~�Status�~Number
of Dominant Species. -
(Plot Size 6 m)
'
-
Total Number of Dominant
-
Species Across All Strata: 3
*
�
Total
Percent of Dominant Species
Sapling/Shrub Stratum_
(Plot Size 4.5 m
. '
zPrevalence
~-----~'
—~----~
---~--~
Index Worksheet:
oTotal
------
------
-----~
% Cover of: Multiply by:
*OBL
Species
------
-----�
/
�
Total
FAC Species 35 x 3 105� |
_ Herb Stratum ` � ��
'
1*omuxlanomn
30
Yes
rAc
4 Alopecuruspratensis
__.15__..
_ no
FAow
o Plantago major
_
o
no
FAou
~—--
snmmum repens_s_
no
=_FAC_
'~--~~-~—
~-----~
~------'
X Prevalence Index is<3.0'
Morphological Adaptationg
o
�
10 �
�
� �Wetland
,
Non -Vascular Planft�
Woody Vine Stratum
(Plot Size
'Indicators of hydric soil and welland hydrology mus
1
The present, unless disturbed or problematic.
u
'HvurvpnvticVegetation Present?
To�|
'
maomomunuin*emnvamm
0 Yes x No �
Remarks: Data plot satisfies hydrophytic vegetation criterion.
Sampling Point: SP-5
SUIL
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) % Type
Loe Texture Remarks
0-10 1 OYR 2/_2_ 95
5YR 4/6 5 C
PL silt loam moist
10-16 1 OYR 2/2 90
5YR 4/6 10 C
PL silt loam moist
Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grainti-ocation: PL=Pore Lining, M=Matdx
Hydric Soil Indicators: (Applicable to all LRR's, unless otherwise noted.)
Indicators for Problematic Hydric Soils':
Histosol (Al)
Sandy Redox (S5)
2 cm Muck (Al 0)
Histic Epipedon (A2)
Stripped Matrix (S6)
Red Parent Material (TF2)
Black Histic (A3)
Loamy Mucky Mineral (FI) (excepMLRAI) Other (Explain in Remarks)
Hydrogen Sulfide (A4)
Loamy Gleyed Matrix (F2)
Depleted Below Dark Surface (All 1)
Depleted Matrix (F3)
3 Indicators of hydrophytic vegetation
Thick Dark Surface (Al2)
X Redox Dark Surface (F6)
and wetland hydrology must be present,
unless disturbed or problematic.
Sandy Mucky Mineral (SI)
Depleted Dark Surface (F7)
Sandy Gleyed Matrix (S4)
Redox Depressions (F8)
Restrictive Layer (if present):
Hydric Soil Present?
Type:
Depth:
Yes X No
Remarks: Data plot satisfies hydric soils criterion.
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply)
Secondary Indicators (2 or more required)
Surface Water (Al)
Water -Stained Leaves (139)
Water -Stained Leaves (139)
X High Water Table (A2)
(except MLRA 1, 2,4A and 413)
(MLRA 1, 2,4A and 413)
X Saturation (A3)
Salt Crust (B1 1)
Drainage Patterns (1310)
Water Marks (131)
Aquatic Invertebrates (1313)
Dry -Season Water Table (C2)
Sediment Deposits (132)
Hydrogen Sulfide Odor (CI)
Saturation Visible on Aerial
Drift Deposits (133) X
Oxidized Rhizospheres along
Imagery (C9)
Algal Mat or Crust (B4)
Living Roots (C3)
Geomorphic Position (D2)
Iron Deposits (135)
Presence of Reduced Iron (C4)
Shallow Aquitard (D3)
Surface Soil Cracks (136)
Recent Iron Reduction in Tilled Soils (C6)
FAC-Neutral Test (D5)
Inundation Visible on
Stunted or Stressed Plants (D1) I_RR A)
Raised Ant Mounds (D6) (LRR A)
Aerial Imagery (137)
Other (Explain in Remarks)
-Frost-Heave Hummocks (D7)
-Sparsely Vegetated Concave Surface (138)
Field Observations:
Wetland Hydrology Present?
Surface Water Present? Yes No
X Depth (inches)
Water Table Present? Yes X No
Depth (inches) 9 in
Yes X No
Saturation Present? Yes X No
Depth (inches) _8 in
(IncludesCapillary Fringe)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspec
Remarks: Data
), if available:
Landau Associates, Inc Western Mountains, Valleys, and Coast Region
ATTACHMENT D
Wetland name: _Wctland A
WETLAND RATING FORM — WESTERN WASHINGTON
Version 2 — Updated July 2006 to increase accuracy and reproducibility among users
Name of wetland (if known): Wetland A Date of site visit: ARdLI 9 2010 and May 12 20 10
Rated by: Jessica Stone and Perryy Welch Trained by Ecology? Yes X No Date of training:/18/2008 —
SEC: 32 TWNSHP: 21N RNGE: 4E Is S/T/R in Appendix D? Yes No—X
Map of wetland unit:— Figure 2 Estimated size: 29 acres
SUMMARY OF RATING
Category based on FUNCTIONS provided by wetland; I II X III IV
Category I = Score > 70
Category II =
Score 51 - 69
Category III =
Score 30 — 50
Category IV =
Score < 30
Score for Water Quality Functions 24
Score for Hydrologic Functions 16
Score for Habitat Functions 26
TOTAL Score for Functions 66
Category based on SPECIAL CHARACTERISTCS bf Wetland 1 II® Does not apply X (preliminaryl
Final Category (choose the "highest" category from above") FWRC Cat
Summary of basic information about the wetland unit.
Does the wetland being rated meet any of the criteria below? If you answer YES to any of the questions below you will
Wetland Rating Form — western Washington, version 2 (7/06) Page 1 of 9
Wetland name: Wetland A
Classification of Vegetated Wetlands for Western Washington
Art� the water levels in the entire unit usually controlled by tides (i.e. except during floods)?
i d •; f class is TidalFringe
FreshwaterIf yes, is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)?
1, dge NO — Saltwater Tidal FringeI
ffyour wellandcan be rr r r r, If it is r Saltwater Tidal
is ratedas an Estuadne wedand Wetlands that were call estuarine in the first and second editions of the rating system are called Salt
Water Tidal Fringe in the Hydrogeomorphio Classification. Estuarine wetlands were categorized separately in the earlier editions, and
this separation is being kept in this revision. To maintain consistency between editions, the term 'Estuarine" wetland is kept. Please
note, however,define Ca:• • I and II estuarine wetlands• •:,
runoff2. The entire wetland unit is flat and precipitation is only source (>90%) of water to it. Groundwater and surface water
are NOTf of • the unit.
okqi40 YES — The wetland class is Flats
r.wetland, use the form forDepressional wetlands.
3. Does the entire wetland meet both of • •
vegetationThe vegetated part of the wetland is on the shores of a body of permanent open water (without any
on f acres (8ha) in size;
At least i' of deep-_ than f
wetland
I. Does the entire wetland meet all of ` following
wetlandThe is on •Ip - (slope can be very gradual).
The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may
flow subsurface,• or f distinct banks.
NOTE:The water leaves the welland without being impounded?
♦ r does notpond in these typesof wetlands exceptoccasionally in very smr and
shallowrr behind hummocks (depressionsare r diameter and less thanfoot ry•y
YES — The wetland class is Slope
5. Does the entire wetland meet all of the following criteria?
X The unit is in a valley or f.: r by overbank flooding from that stream or
NOTE:X The overbank flooding occurs at least once every two years.
can r r depressions r' arefilled with waterr rsr
NO to s r class is Riverine
• Is the entire wetland unit in a topographicdepression ponds, or d to the surface, at someof
the year. This means that any outlet, if present is higher than the interior of the wetland.
NO g• toThe-wetland class is Depressional
7. Is the entire welland 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.
No v: • I t • i wetland class is DeEressional
11
8. Your wetland unit seems to be difficult to classify and probably cf . different . - For 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 OF E HT YDROLOGIC REGINIES DESCRIBED IN QUESTIONSDIFFERENT
AREAS IN TBE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the
rating_ system ifyouseveral present your i rtable only - • . - i in
the second column represents 10% or more of the total area of the wetland unit being rated. If the area of the class listed in column 2 is less
than 10% of r using the class that representsmore •l% of d.
i /. s r 1 I •
Wetland Rating Form — westem Washington, version 2 (7/06) Page 2 of 9
Does the wetland have the g4tenfial to improve water quality?
D 1.2 e soil 2 inches below the sufWd (or duff layer) is clay or organic (use NRCS definitions)
• Wetland has persistent, ungrazed vegetation > = 95% of area .. points = 5
• Wetland has persistent, ungrazed vegetation > = 1/2 of area... .... ....... points = 3
• Wetland has persistent, ungrazed vegetation > = 1/10 of points = I
A" of CowaA in vegetation classes
Immmul
Total for D 1 Add the points in
A stream or culv&ft discharges into wetland that drains developed areas, residential areas, farmed
fields, roads, or clear-cut logging _j
Multiplier
x Ri&si&niial, urban areas, golf courses are within 150 ft. of wetland
Witland is fed by grouhd,"�r high ih OuJ�horus or nitrogen
Other
2
YES multiplier is 2 NO multiplier is 1
law
Depth of storage during wet criods�; 40iMate the height ofponding above the bottom of the outlet. F(j
I units with no outlet measurefrom the surface ofpermanent water or deepestpart �VdIiI
Marks of ponding are 3 ft. or more above the surface or bottom of ifie 600t ...... points
- Marks of ponding between 2 ft. to < 3 ft. from surface or bottom of outlet .................. ...... points =
- Wetland is flat (yes to Q.2 or Q.7 on key)but has small depressions on the surface that trap water points —
JELISHWOUDWI EARN,
Multiplier
Wetland name: Wetland
groundwater in areas where damaging groundwater flooding does not occur. Note which of the following
indicators of opportunity apply.
X Wetland is in a headwater of a river or stream that has flooding problems.
X - Wetland drains to a river or stream that has flooding problems
Wetland has no outlet and impounds surface runoff water that might otherwise flow into a river or 2
stream that has flooding problems
Other
YES multiplier is 2 NO multiplier is 1 11
TOTAL — Hvd rologic Functions Multiply the score from D3 by D4-, then add score to table on D. I 16
Comments
Wetland Rating Form — western Washington, version 2 (7/06) Page 4 of 4
Wetland name: Wetland A
1 Does the wetland have the potential to provide habitat for many species'.
H 1.1?e etaeion structure (see l', 72):
Check the types of vegetation classes present (as defined by Cowardin) Size thresholdfor each class is
114 acre or ritore than d o 'the area of unit is smaller than 2.5 acres.
Aquatic Bed
Emergent plants
Scrub/shrub (areas where shrubs have> 30%diver) 4
Forested (areaswhere trees have > 30 cover)
I) the unit has a forested class chock if«"
The forested class has 3 out of 3 strata (canopy, sub -canopy, shrubs, herbaceous, moss/ground-
cover) that each cover 20% within the Forested. polygon.
Add the number of vegetation types that qual fy. If'vou have:: l�'iCap of Cowardin vegetation classes
4 structures or more...,,., points = 4 3 structures.,..... .._.._.points
2 structures .......... pomts= I 1 structure ... points'- 0
H 1.2 HydMggiods (seep.73):
Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to
cover more than•'. 10 of the wetland or 114 acre to count (see text for deseriptions of hydroperiods).
Permanently flooded or inundated 4 or more types present points = 3 3
Seasonally flooded or inundated 3 or more types present points = 2
Occasionally flooded or inundates) 2 types present ........:.. ...m...points = I
• Saturated only I type present....................points = 0
• Permanently flowing stream or river in or adjacent to, the ssretiand
• Seasonally floNving stream in, or adjacent to, the wetland
Lake -fringe wetland.... = 2 points
Freshwater tidal wetiand,..q==..= = 2 points Map of hydroperiods
H 1.3 Richness of Plant a apecies (see p. 75)w
0
Count the number of plant species in the wetland that cover at least 10 ft' (different patches of the same
species can be combined to meet the size threshold)
You do not have to name the species. Do not include Eurasian Milfoil, reed canarygrass, purple
loosestrife, Canadian Thistle. If you counted: > 19 species.......... .... ..... - points = 2
5 19 species.,. .............. points = 1 2
List species below if you want to: < 5 species ....... „ ..m.;._.,. points =, 0
H 1.4 Interspersion of Habitats (see p. 76)i
Decided from the diagrams below whether interspersion between Cowardin vegetation (described in H1.1), or
the classes and unvegetated areas (can include open water or mudats) is high; medium, low, or none.
Note: If you have 4 or more classes
or 3 vegetation classes and
open water, the rating is
None'= 0 points Loin = : point Moderate - 2 points always "high
Use map of Cowardin classes. 3
t
[riparian braided channek]
Fi h == ro in
H 1.5 Special Habitat Features (seep. 77):
Check the habitat features that are present in the wetland. The number of checks is the number of points
you put into the next column.
X Large, downed, woody debris within the wetland > 4 in, diameter and 6 ft, long)
X Standing. snags (diameter at the bottom > 4 inches in the wetland
X Undercut banks are present for at least 6,6 t"t. (m) andlor overhanging vegetation extends at least
3.3 ft, (1m) overa stream (or (Hitch) in or contiguous with the unit, for at least33 & (10m) 5
Stable steep banks of fine material that ought be used by beaver or muskrat for denning
(> 30 degree slope) OR signs of recent beaver activity are present (cant shrubs or trees that have
not yet turned aeo lbrrawn)
X At least 1/4 acre of thin -stemmed persistent vegetation or woody branches are present in areas that
are permanently or seasonally inundated (structures for egg" -lasing by amphibians)
Invasive lants cover less than 25% of the wetland area in each stratums of plants
NOTE he 20 stated in early printings of the manual on page 78 is art error.
H 1 TOTAL Score - potential for providing habitat Add the aoints in the column above 17
Wetland Rating Form — western Washington, version 2 (7/06) Page 5 of 9
Wetland name: Wetland A
H 2 Does the wetland have the oUggLLuo_itX to provide habitat for many species?
H 2.1 Buffers (see P. 80):
Choose the description that best represents condition of buffer of wetland unit. The highest scoring
criterion that applies to the wetland is to be used in the rating. See text for definition of "undisturbed".'!
100m (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water
> 95% of circumference. No structures are within the undisturbed part of buffer
(relatively undisturbed also means no grazing, no landscaping, no daily human use) ............. points = 5
100m (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water
> 50% circumference... ................ -- .... ... -- . points =4
50m (170 ft) of relatively undisturbed vegetated areas, rocky areas, or open water
> 95% circumference.: ............................................................................... .................. points= 4 2
100m (330 ft) of relatively undisturbed vegetated areas, rocky areas, or open water
> 25% circumference ............................ ............ ........ --- ....... ....... points = 3
50m (170 ft) of relatively undisturbed vegetated areas, rocky areas, or open water
for > 50% circumference points = 3
If buffer does not meet any of the criteria above:
No paved areas (except paved trails) or buildings within 25m (80 ft) of wetland >
95% circumference. Light to moderate grazing or lawns are OK..... ......... ...... .... points = 2
X No paved areas of buildings within 50m of wetland for > 50% circumference.
Light to moderate grazing or lawns are OK ................................................................... points = 2
Heavy grazing in buffer ............ .............................. points = 1
Vegetated buffers are < 2m wide (6.6 ft) for more than 95% circumference
(e.g. tilled fields, paving, basalt bedrock extend to edge of wetland) ...... ........ ........ points = 0
Buffer does not meet any of the criteria above ....... .......... - ............ points = 1
Arial photo showing buffers
H2.2 Corridors and -Connections (seep. 81)
H 2.2.1 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor (either riparian
or upland) that is at least 150 ft. wide, has at least a 30% cover of shrubs, forest or native
undisturbed prairie, that connects to estuaries, other wetlands or undisturbed uplands that are at
least 250 acres in size? (Dams in riparian corridors, heavily used gravel roads, paved roads,
are considered breaks in the corridor).
YES = 4 points (go to H 2.3) NO = go to H 2.2.2
H. 2.2.2 Is the wetland part of a relatively undisturbed and unbroken vegetated corridor (either riparian 0
or upland) that is at least 50 ft. wide, has at least 30% cover of shrubs or forest, and connects to
estuaries, other wetlands or undisturbed uplands that are at least 25 acres in size? OR a Lake -
fringe wetland, if it does not have an undisturbed corridor as in the question above?
YES = 2 points (go to H 2.3) NO = go to H 2.2.3
H. 2.2.3 Is the wetland:
• Within 5 mi (8km) of a brackish or salt water estuary OR
• Within 3 miles of a large field or pasture (> 40 acres) OR YES = I point
• Within I mile of a lake greater than 20 acres? NO = 0 points
Comments:
Wetland Rating Form — western Washington, version 2 (7/06) Page 6 of 9
Wetland name: )Ke_thndA
H2.3 Near or adiacent tither I I'll lI habitats listed by WI55f W (see p. 82):
Which of the following priority habitats are within 330 ft. (I 00m) of the wetland? NOTE: the connections do 1
not have to be relatively undisturbed These are DFW definitions. Check with your local DFW biologist if
there are any questions.
• Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both
aquatic and terrestrial ecosystems which mutually influence each other.
Aspen Stands: Pure or mixed stands of aspen greater than 0.8 ha (2 acres)
Cliffs: Greater than 7.6m (25 ft) high and occurring below 5000 ft.
Old -growth 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 20 trees/ha (8 trees/acre) > 81 cm
(32 in) dbh or > 200 years of age.
• Mature forests: Stands with average diameters exceeding 53cm (21 in) 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.
Prairies: Relatively undisturbed areas (as indicated by dominance of native plants) where greases
and/or forbs form the natural climax plant community.
Talus: Homogenous areas of rock rubble ranging in average size 0.15 — 2.0m (0.5 — 6.5 ft),
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.
Oregon white Oak: Woodlands stands of pure oak or oak/conifer associations where canopy 4
coverage of the oak component of the stand is 25%.
• Urban Natural Open Space: A priority species resides within or is adjacent to the open space and
uses it for breeding and/or regular feeding; and/or the open space functions as a corridor connecting
other priority habitats, especially those that would otherwise be isolated; and/or the open space is an
isolated remnant of natural habitat larger than 4 ha (10 acres) and is surrounded by urban
development.
Estuary/Estuary-like: Deepwater tidal habitats and adjacent tidal wetlands, usually semi -enclosed
by land but with open, partly obstructed or sporadic access to the open ocean, and in which ocean
water is at least occasionally diluted by freshwater runoff from the land. The salinity may be
periodically increased above that of the open ocean by evaporation. Along some low -energy
coastlines there is appreciable dilution of sea water. Estuarine habitat extends upstream and landward
to where ocean -derived salts measure less than 0.5 ppt. during the period of average annual low flow.
Includes both estuaries and lagoons.
Marine/Estuarine Shorelines: Shorelines include the intertidal and subtidal zones of beaches, and
may also include the backshore and adjacent components of the terrestrial landscape (e.g., cliffs,
snags, mature trees, dunes, meadows) that are important to shoreline associated fish and wildlife and
that contribute to shoreline function (e.g., sand/rock/log recruitment, nutrient contribution, erosion
control).
If wetland has 3 or more priority habitats. = 4 points If wetland has I priority habit I point
If wetland has 2 priority habitats .............. = 3 points No habitats ............................... = 0 points
Note: All vegetated wetlands are by definition a priority habitat but are not included in this list.
(Nearby wetlands are addressed in
H 2.4 Wetland Landscape: Choose the one description of the landscape around the wetland that best fits (see p. 84)
• There are at least 3 other wetlands within 1/2 mile, and the connections between them are
relatively undisturbed (light grazing between wetlands OK, as is lake shore with some boating,
but connections should NOT be bisected by paved roads, fill, fields, or other development .......... points = 5
• The wetland is Lake -fringe on a lake with little disturbance and there are 3 other lake -fringe
wetlandswithin 1/2 mile ................... ................................................................................. points = 5 3
• There are at least 3 other wetlands within 1/2 mile, BUT the connections between them are
disturbed. ...... ..... .. .............. I__..,., .,...... ...... points = 3
• The wetland fringe on a lake with disturbance and there are 3 other lake -fringe wetlands
within1/2 mile ....................................................... .......................points = 3
• There is at least I wetland within 1/2 mile. ......... ....___.,,.,,_points = 2
• There are no wetlands within 1/2 . ..... •....... __._ ................. points =
H 2 TOTAL Score — opportunity for providing habitat Add the scores from H2. 1, H2.2, H2.3, H2.4 9
TOTAL for H I from page 17
Add the points for H I and H 2; then record the result on p. 1 26
Total Score for Habitat Functions
Wetland Rating Form — western Washington, version 2 (7/06) Page 7 of 9
MAIM IE�11 MIM13
Please determine if the wetland meets the attributes described below
and circle the appropriate answers and Category.
XMI
0"
Av
sci Estuarine wetlands? (see p.86)
Does the wetland unit meet the following criteria for Estuarine wetlands?
The dominant water regime is tidal,
Vegetated, and
With a salinity greater than 0.5 ppt.
YES =GotoSC 1.1 NO X
SC 1.1 Is the wetland unit within a National Wildlife Refuge, National Park, National Estuary Reserve, Natural
Area Preserve, State Park or Educational, Environmental, or Scientific Reserve designated under WAC Cat. 1
332-30-151? YES =Category I NO = go to SC 1.2
SC 1.2 Is the wetland at least I acre in size and meets at least two of the following conditions?
YES =Category I NO = Category II Cat. I
The wetland is relatively undisturbed (has no dikinp�
, ditching, filling, cultivation, grazing, and has
less than 10% cover of non-native plant species. I the non-native Spartina sp are only species
that cover snore than 10% of the wetland, then the wetland should be given a Tllal rating (1/11). Cat. 11
The
h e area 13 a 'na d be rated a Category 11 while the relatively undisturbed upper marsh
I " would
'8'
a a, f p d
c
with native
's species
won' be a Category 1. Do not, however, exclude the area of Spirtina, in
he size hre5hold of I acre. Dual
'v p
to
de rin itung th
e h I t d rd edgeof the wetland has a 100 ft. buffer of shrub, forest, or un-grazed Rating
At east 3/4 0 t , an "a
or un_mowed grassilld
The wetland has at least 2 of the following features: tidal channels, depressions with open water,
or contiguous freshwater wetlands.
SC 2 Nisitgral-14eritage Wetlands (seep. 87)
Natural Heritage wetlands have been identified by the Washington Natural Heritage Program/ DNR as
either high quality undisturbed wetlands or wetlands that support state Threatened, Endangered, or
Sensitive plant species.
SC 2.1 Is the wetland being rated in a Section/Township/Range that contains a natural heritage wetland? (This
question is used to screen out most sites before you need to contact WNYPIDNR.)
S/T/R information from Appendix D or accessed from VTNHP/DNR web site
YES — Contact WNHP/DNR (see p. 79) and go to SC 2.2 NO X
SC 2.2 Has DNR identified the wetland as a high quality undisturbed wetland or as a site with state threatened
or endangered plant species? Cat I
YES = Category I NO X not a Heritage Wetland
C3 Boys (seep. 87)
Does the wetland (or any part of the unit) meet both the criteria for soils and vegetation in bogs? Use
the key below to identify if the wetland is a bog. If you answer yes you will still need to rate the
wetland based on its function.
1. Does the unit have organic soil horizons (i.e. layers of organic soil), either peats or mucks, that
compose 16 inches or more of the first 32 inches of soil profile? (See Appendix B for a field key to
identify organic soils)? YES = go to question 3 NO = go to question 2
2. Does the wetland have organic soils, either peats or mucks that are less than 16 inches deep over
bedrock, or an impermeable hardpan such as clay or volcanic ash, or that are floating on a lake or
pond? YES = go to question 3 NO = is not a bog for purpose of rating
3. Does the unit have more than 70% cover of mosses at ground level, AND other plants, if present,
consist of the "bog" species listed in Table 3 as a significant component of the vegetation (more
than 30% of the total shrub and herbaceous cover consists of species in Table 3)?
YES = Is a bog for purpose of rating NO = go to question 4
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" deep. If the pH is
less than 5.0 and the "bog" plant species in Table 3 are present, the wetland is a bog.
4. Is the unit forested (> 30% cover) with sitka spruce, subalpine fir, western red cedar, western
hemlock, lodgepole pine, quaking aspen, Englemann's spruce, or western white pine. WITH any of
the species (or combination of species) on the bog species plant list in Table 3 as a significant
component of the ground cover (> 30% coverage of the total shrub/herbaceous cover)? Cat. I
YES = Category I NO = X Is not a bog for purpose of rating
Weiland Rating Form — western Washington, version 2 (7/06) Page 8 of 9
Wetland name: Wetland A
5C4 Forested Wetlands (seep. 90)
Does the wetland have at least I acre of forest that meet one of these criteria for the Department of Fish
and Wildlife's forests as priority habitats? Ifyou answer yes you will still need to rate the wetland
based on its function.
Old -growth forests: (west of Cascade Crest) Stands of at least two three species forming a
multi -layered canopy with occasional small openings; with at least 8 trees/acre (20 trees/hectare)
that are at least 200 years of age OR have a diameter at breast height (dbh) of 32 inches (81 cm or
more).
NOTE: The criterion for dbh is based on measurements for upland forests. Two -hundred year old trees
in wetlands will often have a smaller dbh because their growth rates are often slower. The DFW
criterion is and "OR" so old -growth forests do not necessarily have to have trees of this diameter.
Mature forests: (west of the Cascade Crest) Stands where the largest trees are 80 — 200 years old
OR have an average diameters (dbh) exceeding 21 inches (53 cm); 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.
Cat. I
YES = Cate ory I NO = X not a forested wetland with
SC5 Wetlands in !Coastal, Lagoons (seep. 91)
Does the wetland meet all of the following criteria of a wetland in a coastal lagoon? -
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 surface 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.)
YES = Go to SC 5.1 NO X not a wetland in a coastal lagoon
SC 5.1 Does the wetland meet all of the following three conditions?
The wetland is relatively undisturbed (has no diking, ditching, filling, cultivation, grazing) and has
less than 20% cover of invasive plant species (see list of invasive species on p. 74).
At least 3/4 of the landward edge of the wetland has a 100 ft. buffer of shrub, forest, or un-grazed
or un-mowed grassland.
Cat. I
The wetland is larger than 1/10 acre (4350 square ft.)
YES = Category I NO =Category II
Cat. II
SC6 Interdunal Wetlands (seep. 93)
Is the wetland west of the 1889 line (also called the Western Boundary of Upland Ownership or
WBUO)?
YES = Go to SC 6.1 NO = X not an interdunal wetland for rating
If you answer yes you will still need to rate the wetland based on its functions.
In practical terms that means the following geographic areas:
• Long Beach Peninsula -- lands west of SR 103
• Grayland-West ort --lands west of SR 105
• Ocean Shores7opalis— lands west of SR 115 and SR 109
SC 6.1 Is the wetland one acre or larger, or is it in a mosaic of wetlands that is one acre or larger?
YES = Category II NO = go to SC 6.2
Cat. II
SC 6.2 Is the wetland between 0.1 and I acre, or is it in a mosaic of wetlands that is between 0.1 and I acre?
YES = Category III
Cat. III
Category of wetland based on Special Characteristics
Choose the "highest" rating if wetland falls into several categories, and record on p. 1.
I
NA
If you answered NO for all types enter "Not Applicable" on p. I
Wetland Rating Form — western Washington, version 2 (7/06) Page 9 of 9
v
LANDAU
ASSOCIATES
TECHNICAL MEMORANDUM ML I
TO: Jeff Wolf
FROM: Jessie Lnce
DATE: August 3, 2010
WETLAND AND STREAM INVESTIGATION AND DELINEATION
ENTicKNAP AND BRIDGES PROPERTIES
FEDERAL WAY, WASHINGTON
INTRODUCTION
At the request of the City of Federal Way (City), Landau Associates conducted wetland and
stream delineation on two properties consisting of five adjacent parcels (study area) located in Federal
Way, Washington (Figure 1). The Enticknap property consists of three parcels; parcel #3221049141
parcel ##3221049123, and parcel #22921049112 (collectively called Enticknap property), owned by Ruth
Enticknap, located east of 8`h Avenue South and west of 12`h Avenue South. The Bridges property
consists of two parcels; parcel #2921049118 and parcel #2921049103 (collectively called Bridges
property), owned by David Bridges, located east of 8`h Avenue South and west of 12`h Avenue South.
Two additional adjacent parcels were investigated as part of the study area for stream and wetland'
continuity, and they include the Larson property which consists of parcel #3221049112 and the Gowers
property which consists of parcel 2921049113. This technical memorandum presents the results of the
wetland and stream delineations and is provided for use by the City to assess and document the condition
of the study area.
SITE DESCRIPTION
The subject properties are "located within the Puyallup/White watershed (Water Resource
Inventory Area 10), Hylebos Creek basin in Township 21, Range 4 E, Section 29 and 32, and east of 8`h
Avenue South, north of 372"d Way. The study area for the wetland and stream investigation consists of
the subject properties, plus the surrounding 200 R which represents the maximum buffer width for critical
areas under the City of Federal Way Revised Code ( C). - The Enticknap property consists of 12.71
acres and the Bridges property consists of 17.22 acres in size. The Enticknap property primarily consists
of forested land and contains one man-made pond and the North fork of West Hylebos Creek (Hylebos
Creek) running through its northwestern section. The Bridges property primarily consists of herbaceous
and scrub -shrub vegetation with a large forested area located immediately west of 121h Avenue South and
contains two man-made ponds with Hylebos Creek running through the property. The Larson property
960 Pacific Avenue, Suite 515 • Tacoma, WA 98402 : (263) 926-2493 • fax (253) 926-2631 • www.landauinc.com
consists of mostly previously cleared areas with Hylebos Creek running through a forested wetland along
its northeast comer. The Gowers property consists of a large emergent wetland with a minor tributary of
Hylebos Creek through the central and southern portions.
10 1 ON V II
This section presents the methods used to delineate the wetlands and streams in the subjeo
rmperties. The extent of wetlands and streams off the subject properties was observed from within the
subject properties' boundaries. Estimation of the extent of offsite wetlands and streams was made from
field observations and readily available public domain resources as described below.
Landau Associates reviewed the following public domain resources to determine existirli
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• Aerial photographs from 1936 to 1997 (King County website 2009)
• Topographic map (USGS 1993; see Attachment A)
• National Wetlands Inventory maps (USFWS 1981 to present; see Attachment A)
• Natural Resource Conservation Service (NRCS) Soil Survey (NRCS 2006 website various
dates; Attachment B)
• County and National Hydric Soils Lists (USDA, NRCS 2010)
• StrearnNet Interactive Mapping, including the Pacific Northwest Mapper (StreamNet website
a; various dates)
• WDNR Forest Practices Application Review System, Water Type Map (V*TDNR website
2007)
• Washington Department of Natural Resources (WDNR) Natural Heritage Program (WDNR
website 2009)
• City of Federal Way critical areas maps (City of Federal Way 2005)
• City of Federal Way riparian corridor property acquisitions and preliminary stream layout
map (City of Federal Way 20 10)
• WSDOT 1-5 SRI 8/SR161 interchange improvement plants (WSDOT 2009)
• King County Imap, Sensitive Areas Map set (King County website 2009).
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FIELD INVESTIGATION
Landau Associates wetland ecologists Sacha Maxwell and Jessica Stone conducted the wetland
and stream investigation on the Enticknap property on July 8, 2009; Landau Associates wetland
ecologists Perry Welch, PS, and Jessica Stone conducted supplemental wetland and stream
investigations on the Enticknap property on April 19, 2010 and wetland and stream investigations on the
Bridges property on May 12, 2010. All site visits were conducted within the official growing season
recognized by the Seattle District USACE (1994). The weather during the July 8, 2009 site
reconnaissance was sunny and 70 degrees, partly cloudy and 55 degrees during the April 19, 2010 site
visit, and 65 degrees and sunny during the May 12, 2010 site visit. Field investigation site photographs
are found in Attachment E.
Wetland Identification and Delineation
The wetland investigation was conducted in accordance with the U.S. Army Corps of Engineers
(USACE) Weiland Delineation Manual (USACE 1987), the USACE Regional Guidance letter on the
1987 Manual (USACE 1994), the USACE Interim Regional Supplement to the Corps of Engineers
Wetland Delineation Manual: Western Mountains, Valleys, and it Region (USACE 2008) and the
Washington State Department of Ecology's (Ecology's) Washington State Wetlands Identification and
Delineation Manual (Ecology 1997). The USACE and Ecology recommend a preliminary data gathering
and synthesis of available background information, followed by a field investigation.
The delineation was conducted using the routine methodology, which includes a three -parameter
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hydrology (Table 1). Following this method, an area is determined to be wetland if all of the following
three criteria are met:
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Data on vegetation, soils, and hydrology was recorded on data sheets (Attachment Q as sampling plots
(SPs) located in areas meeting the mandatory wetland criteria, and in nearby upland to determine
corresponding wetland/upland boundaries. The wetland boundaries were delineated using numbered
flagging. The boundaries of wetlands extending outside of the study were estimated based on views from
the study area and aerial photographs and/or other information from the background information review.
813/10 YA238\057.030\Metland Endcknap_Bddges_tm.doc LANDAU ASSOCIATES
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hydrologic data and observation of field indicators including hydrology, soil and sediment, vegetation,
and marks of scouring, etc. All data points were marked using labeled flagging. The boundaries of
streams extending outside of the study were estimated based on views from the study area and aerial
photographs and/or other information from the background information review.
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key habitat features, and/or key structures were recorded using a Trimble global positioning system (GPS)
hand-held device, and maps were prepared using ArcView GIS software by Landau Associates. The
average accuracy of the field surveyed points is +/- 1.4 ft with the lowest accuracy being +/- 4.5 ft and the
highest accuracy being I ft. The field survey accuracy is such that the results are intended for planning
purposes only, and should not be used as professional survey boundaries for design, pennitting, and/or
construction applications. Additional surveying was conducted on select points and features on the
Enticknap property by Baseline Engineering Inc.
WETLAND AND STREAM CLASSIFICATION, RATING AND BUFFER WEDTH
Wetlands identified and/or delineated as part of this project were classified according to the U.S.
Fish and Wildlife Service's (USFWS's) Cowardin classification system (Cowardin et al. 1979) and the
USACE's hydrogtomorphic (HGM) classification system ( Brinson 1993). Wetlands were rated according
to the Washington State Wetlands Rating System for Western Washington (Hruby 2004; Attachment D).
This system categorizes wetlands based on their existing functions, including water quality, hydrology,
and habitat, as well as the wetland's rarity, sensitivity to disturbance, or irreplaceability. Wetlands were
also rated according to the FWRC. Wetland buffers were detennined according to Section 19.175.020
(Wetland categories and standard buffers) of the FWRC.
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stream delineations. Information on the wetland ratings and stream classifications is also provided in this
section.
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rVACKGROUND INFORMATION REVIEW
The Soil Survey Geographic database (USDA, NRCS 2006) maps six soil series within the study
area: 1) Alderwood gravelly sandy loam, 6 to 15 percent slopes (AgC); 2) Bellingham silt loam
Everett gravelly sandy loam 5-15 percent slopes (EvC); 4) Shalcar muck (Sm); 5) Snohomish silt loam
(So); and 6) Tukwila Muck (Tu) (see Attachment B). Soils within the study area that are listed on the
Hydric Soils List for King County include AgC and Bh (within depressions), Sm, So (within depressions
and floodplains), and Tu (USDA, NRCS 2010).
The FENLk floodplain maps identify the onsite and offsite properties as Zone X (areas outside *a.
StreamNet (StreamNet website a, various dates) and WDNR (WDNR website 2007) identify the
The City critical areas map shows the above -listed stream and a large wetland complex on the
cubject properties. The National Wetlands Inventory shows a large wetland complex (herein referred to as
Wetland A) within the vicinity of the study area. Wetland A is mapped as including the following
community types: palustrine emergent, scrub -shrub, forested, and aquatic bed/open water (Cowardin
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UIELD INVESTIGATION
Onsite portions of a wetland complex and eleven streams were investigated within the study area.
1--Iylebos Creek flows from the north and enters the study area at the northern property boundary between —
the Bridges property (Parcel #2921049118) and the Gowers property (Parcel #2921049113) and extends
down into the Enticknap property (Parcel #3221049141). The remaining streams identified are entirely
within Wetland A. Streams Enticknap Stream I and Enticknap Stream 2 are entirely within the Enticknap
property and Bridges Streams 3, 4, 5, 6, 7, is and 9 are entirely within the Bridges property. Bridges
Stream I and Bridges Stream 2 start on the Bridges property (Parcel 2921049103) and extend down onto
the Enticknap property (Parcels #2921049112 and 3221049141). An additional stream located on the
Gowers property, Gowers Stream, was identified in Wetland A north of the Bridges property. The stream
and wetland locations are also shown on Figure 2 and summarized in Table 2.
The total onsite wetland and buffer areas and stream length were calculated for each of the
properties. Stream buffer areas were not calculated because they fall within either wetland or wetland
buffer areas. The onsite wetland and buffer areas are summarized in the table below and described in
8/3/10 Y:1238%057.030\R\Wefland Enfickinap-Bididgesi_Wdoc
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Property Property Size Onsite Wetland Onsite Buffer Major Streams Minor Streams
Area Area Length Length
Enticknap Property 12.70 acres 5.06 acres 4.71 acres 511 ft 76 ft
Bridges Property 17.29 acres 14.32 acres 2.90 acres 1,653 ft 11266 ft
Total for Study Area 29.99 acres 19.38 acres 7.61 acres 2,164 ft 1,342 ft
A state-owned drainage easement (not mapped) is located east of Parcel #3221049123 on the
Enticknap property and intersects Bridges Stream I within a culvert at approximately the intersection of
the Enticknap and Bridges property parcels. A grate in the culvert (labeled as outfall from state drainage
structure on Figure 2) is located at the approximate intersection point. Based on conversations with City
staff, the drainage easement contains a pipe that discharges to Bridges Stream 1. The direction of water
flow within the grate was not visible during the site visit, nor could field staff confirm that water was
discharging from the state drainage structure to Bridges Stream 1.
Detailed data on vegetation, soil, and hydrology parameters was recorded at sample plots
throughout the subject properties. A summary of these parameters, as well as the classification, rating,
and buffer width for each wetland and stream within the studv area are Dresented below. Sawiffle Dlot dat?
VOMP17WO
Wetland A is an approximately 29-acre palustrine forested and emergent/depressional
(Cowardin/HGM classification) wetland. All three mandatory wetland criteria are satisfied for Wetland A
(see Attachment Q. Vegetation in Wetland A is diverse and includes tree, shrub, emergent, and aquatic
bed vegetation layers. Typical dominant hydrophytic; species include a canopy of red alder (Alnus rubra),
Emergent and scrub -shrub vegetation include spirea. (Spiraea douglasii), cattail (Typha latifolia), small -
fruit bulrush (Scripus microcarpus), and creeping buttercup (Ranunculus repens) (see data plots for
additional species). Soils in Wetland A are indicated to be hydric based on hydric soils criteria such as
presence of redox dark surface (indicator 176), hydrogen sulfide (indicator A4) odors, and loamy mucky
mineral (indicator Fl). Indicators of wetland hydrology include oxidized rhizospheres and saturated soil
and/or a high water table (standing water present at the time of all three field investigations). Wetland A
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and approximately 83 percent of the Bridges property. Wetland and wetland buffer coverage for each
parcel is shown on Table 2. Hydrology in Wetland A is sustained primarily by a high groundwater table,
813110 YA23M57.030RMetland EnUcknap-Mdges�_tndoc LANDAU AssoCIATES
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but also receives hydrology from hillside springs, precipitation, and overbank flooding from the ponds
and riverine systems. The Enticknap pond located within Wetland A was apparently excavated in the
1970s (Enticknap, R., 2009, personal communication) and the two Bridges ponds (East and West) were
excavated sometime between 1960 and 1969 based on aerial photographs (Landau Associates 2009).
Beaver activity is also present on the Enticknap pond and both Bridges ponds.
Wetland A is rated as a Category 2 wetland under the Ecology wetland rating system (see
Attachment D) and as a Category I wetland under the FWRC. Under the FWRC a wetland is rated as a
wboignized bVii state or federal agencies as endana_ered or threatened. Coho
salmon, a federal species of concern, and steelhead, a federally threatened species, have been sited in
Hylebos Creek (StreamNet website a. various, dates) (WDFW website 2009) (Appleton, W., 2009,
Personal Communication). Hylebos Creek runs directly through Wetland A on the Bridges property
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Additionally, Bridges Streams 1, 7 and 8 and Enticknap Streams I and 2 are major fish -bearing streams
that connect to Hylebos Creek. Wetland A contributes to stream health and habitat by shading of the
creeks, contribution of woody debris, and nutrient cycling. The FWRC requires a 200-ft standard buffer
width for Category I wetlands. The wetland, streams, and buffer areas within the subject properties are
shown on Figure 2.
Streams
Hylebos Creek is a permanently flowing major stream that flows into the Puget Sound via the
Hylebos Waterway, which drains into Commencement Bay in Tacoma. From its headwaters in Federal
Way, West Hylebos Creek flows into the Bridges property (parcel #2921049118) from the north, and
flows to the south through the center of the parcel and into the northeast comer of the Enticknap property
(parcel # 3221049141) where it then flows to the northwest back into the Bridges property. It then flows
to the west and under 8th Avenue South. Within the study area, Hylebos Creek receives water from
Wetland A and from Bridges Streams 1, 5, 7, 8 and 9, and the Gowers Stream. At the time of the field
investigation, water depth in the channel within the study area ranged from 4 to 15 inches and was
flowing south and then west. Channel bank -full width ranges from 6 to 10 ft. Substrate is composed of
silt, gravel and fine to medium sand. Riparian vegetation consists of tree, shrub, and emergent wetland
species.
Bridges Stream I is a permanently flowing major stream that is a tributary to Hylebos Creek. The
upper 200 ft of Bridges Stream I is a minor stream as its size diminishes upstream and does not offer fish
habitat. Bridges Stream I originates from a spring at the northern end of the Bridges property (Parcel
#2921049103) and flows to the south where it continues through the Enticknap property (Parcel
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the Bridges property. At the time of the field investigation, Bridges Stream 4 was approximately 3 ft
wide and water depth ranged from 1 to 2 inches. Tbe stream begins near the northwest comer of Parcel
#2921049103 where it flows to the south and connects to the East Bridges Pond on Parcel #2921049118.
Substrate is composed of muck. Riparian vegetation consists of shrub and emergent wetland species,
Bridges Stream 5 is a permanently flowing minor stream located entirely within Wetland A on
the Bridges property (Parcel #2921049118). At the time of the field investigation, Bridges Stream 5 was
approximately 2 R wide with a water depth of 1.5 inches. The stream flows west through a short culvert
and then connects to Hylebos Creek. Substrate is composed of muck. Riparian vegetation consists of tree,
shrub, and emergent wetland species.
Bridges Stream 6 is a permanently flowing minor stream located entirely within Wetland A on
the Bridges property (Parcel #2921049118). At the time of the field investigation, Bridges Stream 6 was
approximately 2 ft wide with a water depth of 5 inches. The water source for Bridges Stream 6 is an
artesian well. From the well it flows approximately 100 R west and into the West Bridges Pond.
Substrate is composed of muck. Riparian vegetation consists of tree, shrub, and emergent welland
species.
8010 Y'.V381057.030\RIWeUand ErIOcknap-&odgas_Im.doc LANDAU ASSOCIATES
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Bridges Stream 7 is a permanently flowing major stream that provides an outlet to the East
Bridges Pond on the Bridges property. (Parcel 42921049118) and flows west to Hylebos Creek. At the
time of the field investigation, Bridges Stream 7 was approximately 6 ft wide with a water depth of 7
inches. Substrate is composed of muck. Riparian vegetation consists of tree, shrub, and emergent
wetland species.
Bridges Stream 8 is a permanently flowing major stream that is an outlet to the West Bridges
Pond on the Bridges property (Parcel 92921049118) and flows southwest to Hylebos Creek. At the time
of the field investigation, Bridges Stream 8 was approximately 2.5 ft wide with a water depth of 5 inches.
The stream flows west through a short culvert and then connects to Hylebos Creek. Substrate is composed
of muck. Riparian vegetation consists of tree, shrub, and emergent wetland species.
Bridges Stream 9 is a permanently flowing minor stream located entirely within Wetland A on
the Bridges property (Parcel #2921049118). At the time of the field investigation, Bridges Stream 9 was
approximately 3 ft wide with a water depth of I inch. The stream begins at a hillside spring near the
eastern side of the Bridges property, and then flows to the east through a short culvert and then connects
to Hylebos Creek. Substrate is composed of silt. Riparian vegetation consists of tree, shrub, and emergent
wetland species.
Enticknap Stream 1 is a permanently flowing major stream located entirely within Wetland A on
the Enticknap property (Parcel #3221049123). At the time of the field investigation, Enticknap Stream I
was approximately 3 ft wide with a water depth of 4 inches. The stream forms the outlet to the Enticknap
Pond, where it flows north and becomes a tributary to Bridges Stream 1. Substrate is composed of silt.
Riparian vegetation consists of shrub and emergent wetland species. Juvenile coho salmon were observed
near the confluence of these waterways.
Enticknap Stream 2 is a short (approximately 25 ft) permanently flowing major stream located
entirely within Wetland A on the Enticknap property (Parcel #3221049141). At the time of the field
investigation, Enticknap Stream 2 was approximately 3 ft wide with a water depth of 2 to 4 inches. The
stream flows to the north and connects to Bridges Stream 1. Substrate is composed of muck. Riparian
vegetation consists of tree and shrub wetland species.
With the exception of Hylebos Creek, the streams within the study area were most likely
constructed to drain and channel water out of Wetland A to allow for J�rming and livestock grazing. The
streams were most likely excavated at the same time as the ponds. Based on historical aerial photographs,
both Bridges ponds were excavated between 1960 and 1969, and the Enticknap pond was excavated in
1970. Discussion with the Enticknap property landowner (Enticknap, R., 2009, personal communication)
revealed that species of trout (likely to be resident cutthroat trout, (Oncorhynchus clarki)) are present
within the Enticknap pond in Wetland A (Parcels #2921049112 and 3221049123). Ruth Enticknap
8/3/10 Y12381057,03MMetland Enticknap-Bridges_tm-doc LANDAU ASSOCIATES
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indicated they were not stocked, but instead migrated via Hylebos Creek and Bridges Stream I and
Enticknap Stream I into the pond. Since both of the Bridges ponds in Wetland A (Parcel #2921049118)
are directly connected to Hylebos Creek through Bridges Stream 7 and Bridges Stream 8, it is assumed
that fish species are also present. Additionally, several species of salmon are reportedly present in
Hylebos Creek and its tributaries (StreamNet website a, various dates) (Appleton, W., 2009, Personal
Communication). Juvenile coho salmon were observed throughout Hylebos Creek in the spring of 2010,
as well as at the confluence of Enticknap Stream I and Bridges Stream 1. Landau Associates observed
resident cutthroat trout in Hylebos Creek during the May 12, 2010 field investigation. Although fish
I!resence was not identified at the time of the field investigations in Bridges Streams 1, 7, 8 and Enticknap
Streams I and 2, they are directly connected to Hylebos Creek, do not contain any fish barriers, and
contain fish habitat.
Therefore, Hylebos Creek, Bridges Streams 1, 7, 8 and Enticknap Streams I and 2 are considered
Type F, fish -bearing streams per DNR typing system and are classified as a "major streams" by the City
a major stream). Major streams require a 100-ft standard set -back, in accordance with the FWRC. Due to
their size or lack of fish habitat, Bridges Streams 2, 3, 4, 5, 6, 9 and the upper reach of Bridges Stream 1
are not considered to contain any fish presence and are considered Type N, non -fish bearing streams per
DNR typing system and are classified as a "minor streams" by the City.
USE OF THIS TECHNICAL MEMORANDUM -
The findings presented herein are based on our understanding of City of Federal Way Code, the
I -- I •— rTVN1 —1 7=
on our interpretation of the vegetative, soil, and hydrology conditions observed during the field
delineation. Within the limitations of scope, schedule, and budget, the findings presented in this technical
memorandum were prepared in accordance with generally accepted sensitive area investigation principles
and practices in this locality at the time the technical memorandum was prepared. We make no other
warranty, either express or implied.
F.Torortrorr M-65 RM".
rely on the information, conclusions, and recommendations included in this document without the express
written consent of Landau Associates and/or the City. Further, the reuse of information, conclusions, and
recommendations provided herein for extensions of the project or for any other project, without review
and authorization by Landau Associates, shall be at the user's sole risk.
Wetland areas delineated by Landau Associates are considered preliminary until the USACE
and/or local jurisdictional agencies validate the wetland boundaries. Because wetlands are dynamic
6/3/10 YA238\057,030\RMetland Enficknap-Bddges�_tndoc LANDAU ASSOCIATES
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communities, wetland boundaries may change over time. The agencies typically recognize wetland
delineations for a period of five years following an approved jurisdictional determination. In addition,
changes in government code, regulations, and/or laws may occur that affect regulation of wetlands or
streams characterized herein.
REFERENCES
Appleton, W., 8 October 2009. Personal communication (conversation with Jennifer"Wynkoop and
Jessica Stone, Landau Associates, Inc., regarding fish presence in Hylebos Creek.) William Appleton,
City of Federal Way.
Brinson, M. 1993. Final Report: A Hydrogeomorphic Classification for Wetlands. Wetlands Research
Program Technical Report WRP-DE-4. East Carolina University, Biology Department. Greenville,
North Carolina. Prepared for U.S. Army Corps of Engineers. August.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and
Deepwater Habitats of the United States. Government Printing Office. Washington, D.C.
Ecology. 1997. Washington State Wetlands Identification and Delineation Manual. Publication No.
96-94. Washington State Department of Ecology. Olympia, Washington. March.
Enticknap, R. 13 July 2009. Personal communication (conversation with Jessica Stone., Landau
Associates, Inc., regarding subject properties and property at 36817 12'h Avenue South). Ruth Enticknap,
Federal Way, A.
Federal Way, City of 2010. Riparian Corridor Property Acquisitions Preliminary Stream Layout Map.
City of Federal Way, SWM division. Map date: May 11.
Federal Way, City of. 2005. City of Federal Way Stream Ratings. City of Federal Way, GIS Division.
Map date: January 2005.
FEMA website. 2009. Firmette. Federal Emergency Management Agency. Accessible from Ma�L,
Service Center: htt'.
Accessed January.
Greytag Macbeth. 1994. Munsell Soil Color Charts. New Windsor, New York.
Hruby, T. 2004. Washington State Wetland Rating System for Western Washington — Revised.
Publication No. 04-06-025. Washington State Department of Ecology. Olympia, Washington.
King County website. 2009. htt//-%vww.metrokc.gov/Q, ISAmap. King County iMAP. Accessed June 30,
2009.
Landau Associates 2009. Phase I Environmental Site Assessment, Enticknap property, East of 8h Avenue
South, North of 372 nd Way, Federal Way, Washington. Prepared for the City of Federal Way. August 21.
NRCS. 2006. Field Indicators of Hydric Soils in the United States, Version 6.0. G.W. Hurt and L.M.
Vasilas (eds.). United States Department of Agriculture, Natural Resources Conservation Service in
8/3/10 YA238\057.030%RMetland Enficknap.Bddges_tm,doc LANDAu ASSOCIATES
[a]
cooperation with the National Technical Committee for Hydric Soils. URL: ftp:Hftp-
fe.se.egg,v.usda.gov/NSSC/Hvdric Soils/FieldIndicators v6 0.vdf Accessed July 30, 2009.
Olson, P. and E. Stockdale. 2008. Determining the Ordinary High Water Mark on Streams in
Washington State. Draft. Publication No. 08-06-001. Washington State Department of Ecology. April.
Available at: http://www.ecy.wa.gov/biblio/0806001.html
Reed, P.B., Jr. 1993. National List of Plant Species That Occur in Wetlands: Northwest (Region 9).
Available at htt //www.fws.2ov/nwi/bha/list88.html. U.S. Fish and Wildlife Service Biol. Rep. 88
(26.9). Washington, D.C.
Reed, P.B., Jr. 1988. National List of Plant Species that Occur in Wetlands: 1988 National Summary.
Available at hM2:+l/Nvww.fws.gov/nwi/bha/list88.html. U.S. Fish and Wildlife Service.
StreamNet Website a. Various dates. Pacific Northwest Mapped. URL: Available at:
http://map.streamnet.org/website/. Accessed February 9, 2009.
USACE. 2008. Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual:
Western Mountains, Valleys, and Coast Region. Technical Report ERDC/EL TR-08-13. U.S. Army
Corps of Engineer Research and Development Center Environmental Laboratory. Vicksburg,
Mississippi. April.
USACE. 1994. Washington Regional Guidance on the 1987 Wetland Delineation Manual. U.S. Army
Corps of Engineers, Seattle District Regulatory Branch. May 23.
USACE. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. U.S.
Army Corps of Engineers Water -ways Experiment Station. Vicksburg, Mississippi. March.
USDA, NRCS. 2010. National Hydric Soils List. Available at
httj2:,/`/soils.usda.gov/tise/hydi-ic/lists/state.hti-nI Accessed May 27.
USDA, NRCS. 2006. Soil Survey Geographic Database. Available at h!V://soildatainirt.nrcs.usda.gov .
U.S. Department of Agriculture, Natural Resources Conservation Service. Ft. Worth, Texas.
USFWS. 1981 to present. National Wetlands Inventory Map. U.S. Fish and Wildlife Service. St.
Petersburg, Florida.
USGS. 1993. Quadrangle, Washington 7.5-Minute Series (Topographic). Scale 1:24,000. U.S.
Geological Survey. Denver, Colorado.
WDFW website. 2009. Species of Concern in Washington State. Available at
hqp://wdfw.wa.gov/N,vim/dimc���S`/S0Cdso .ht . Washington Department of Fish and Wildlife. Accessed
October 7, 2009.
WDNR website. 2009. Washington Natural Heritage Program.
littj2,//www I dnr.wa.gov/niip/-ref Department of Natural Resources.
de "k/ Jantshtnil. Washington
Accessed June 30, 2009.
WDN. 2007. Forest Practices Application Review System, Water Type Map. Available at
httt):,I/fortre,ss.wa.gov/dnrlapp I /f pars/viewenhtm. Accessed February 9, 2009.
6/3/10 YVM057,030kMetland Enticknap-Bddges��.doc LANDAu AsSOCJATU�
WDNR. 2007. StreamNet Interactive Mapper. Available at
littp:Hmap.strea—ninet-or2ebsite/bluesnetmavver/viewer.htni . Accessed February 9, 2009.
WSDOT. 2009. 1-5 SRI 81SR1 61 Interchange Improvements. Sheet EV2, 295 of 491. February 10,
Attachments: Figure I — Vicinity Map
Figure 2 — Site Plan
Table I — Methods for Wetland Determination
Table 2 — Wetland and Stream Descriptions
Table 3 — Wetland, Stream and Buffer Coverage
Attachment A — Background Information
Attachment B — Soils Series Descriptions
Attachment C — Wetland Data Sheets
Attachment D — Wetland Rating Forms
Attachment E — Site Photographs
813/10 YA236\057.030 Metland EnUcknaP-Bddgesjm,doc
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WETLAND AND STREAM DESCRIPTIONS
System
Classification
Category (Rating Agency)
Buffer Width (City)
Wetland A
PFO,PEM1 E and AB3,
11 (Ecology)
200 ft
Kbx / Depressional
I (City)
Hylebos Creek
Perennial Stream
Major Stream (City)
100 ft
Type F (DNR)
Bridges Stream I
Perennial Stream
Major Stream (City)
100 ft
(Tributary to Hylebos Creek)
Type F (DNR)
Bridges Stream 2
Intermittent Stream
Minor Stream (City)
50 It
(Tributary to Bridges Stream 1)
Type N (DNR)
Bridges Stream 3
Perennial Stream
Minor Stream (City)
50 ft
(Tributary to Bridges Stream 1)
Type N (DNR)
Bridges Stream 4
Perennial Stream
Minor Stream (City)
50ft
(Flows to East Bridges Pond)
Type N (DNR)
Bridges Stream 5
Perennial Stream
Minor Stream (City)
50 ft
(Tributary to Hylebos Creek)
Type N (DNR)
Bridges Stream 6
Perennial Stream
Minor Stream (City)
50 ft
(Flows to West Bridges Pond)
Type N (DNR)
Bridges Stream 7
Perennial Stream
Major Stream (City)
100 ft
(Tributary to Hylebos Creek)
Type F (DNR)
Bridges Stream 8
Perennial Stream
Major Stream (City)
100 ft
(Tributary to Hylebos Creek)
Type F (DNR)
Bridges Stream 9
Perennial Stream
Minor Stream (City)
50 ft
(Tributary to Hylebos Creek)
Type N (DNR)
Enticknap Stream I
Perennial Stream
Major Stream (City)
100 ft
(Tributary to Bridges Stream 1)
Type F (DNR)
Enticknap Stream 2
Perennial Stream
Major Stream (City)
100 ft
(Tributary to Bridges Stream 1)
Type F (DNR)
8/3/2010 y:\238\057.030\R\Tbi 2 LANDAU ASSOCIATES
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USDA Natural Resources Web Soil Survey 5/27/2010
aiiIIIIIIIIIIIII Conservation Service National Cooperative Soil Survey Page 1 of 3
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Enticknap and Bridges Properties
Natural Resources Web Soil Survey 5/2712010
Conservation Service National Cooperative Soil Survey Page 3 of 3
Map Unit Description: Alderwood gravelly sandy loam, 6 to 15 percent slopes— Enticknap and Bridges Properties
King County Area, Washington
z=111111 TZ17=11.• • ;
-• " . - • �. • • s. . • . r .
Map Unit Setting
Elevation: 50 to 800 feet
Mean annual precipitation: 25 to 60 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period. 180 to 220 days
Map Unit Composition
Alderwood and similar soils: 95 percent
Minor components: 5 percent
Setting
Landform: Moraines, till plains
Parent material: Basal till with some volcanic ash
Properties and qualities
Slope: 6 to 15 percent
Depth to restrictive feature: 24 to 40 inches to dense material
Drainage class: Moderately well drained
Capacity of the most limiting layer to transmit water (Ksat): Very low
to moderately low (0.00 to 0.06 in/hr)
Depth to water table: About 18 to 37 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Very low (about 2.5 inches)
Interpretive groups
Land capability (nonirrigated): 4s
Typical profile
0 to 12 inches: Gravelly sandy loam
12 to 27 inches: Very gravelly sandy loam
27 to 60 inches: Very gravelly sandy loam
Minor Components
Norma
Percent of map unit. 1 percent
Landform: Depressions
Bellingham
Percent of map unit. 1 percent
Landform: Depressions
Seattle
Percent of map unit. 1 percent
Landform: Depressions
Tukwila
Percent of map unit. 1 percent
USDA Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 1 of 2
Map Unit Description: Alderwood gravelly sandy loam, 6 to 15 percent slopes —
King County Area, Washington
Landform: Depressions -
Shalcar
Percent of map unit, 1 percent
Landform: Depressions
Data Source Information
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
Enticknap and Bridges Properties
USDA Natural Resources Web Soil Survey 5/27/2010
Q" Conservation Service National Cooperative Soil Survey Page 2 of 2
Map Unit Description: Bellingham silt loam —King County Area, Washington Enticknap and Bridges Properties
2=1 IF I I I I I I � � 11i
Bh—Bellingham silt loam
Map Unit Setting
Mean annual precipitation: 35 to 60 inches
Mean annual air temperature: 50 degrees F
Frost -free period: 150 to 210 days
Map Unit Composition
Bellingham and similar soils: 85 percent
Minor components: 15 percent
Description of Bellingham
Setting
Landform: Depressions, drainageways
Parent material. Alluvium
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr)
Depth to water table: About 0 to 12 inches
Frequency of flooding: None
Frequency of ponding. None
Available water capacity.- Very high (about 12.6 inches)
Interpretive groups
Land capability (nonirrigated): 5w
Typical profile
0 to 11 inches: Silt loam
11 to 60 inches: Silty clay loam
Minor Components
Seattle
Percent of map unit., 5 percent
Landform: Depressions
Alderwood
Percent of map unit., 5 percent
Everett
Percent of map unit., 5 percent
Data Source Information
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
USDA Natural Resources Web Soil Survey 5/27/201 C
;'� Conservation Service National Cooperative Soil Survey Page 1 of 1
Map Unit Description: Everett gravelly sandy loam, 5 to 15 percent slopes —King Enticknap and Bridges Properties
County Area, Washington
Map Unit Setting
Mean annual precipitation: 30 to 45 inches
Mean annual air temperature: 50 degrees F
Frost -free period.- 180 days
Map Unit Composition
Everett and similar soils: 100 percent
Description of Everett
Setting
Landform: Terraces
Parent material., Glacial outwash with a component of volcanic ash in
the upper part
Properties and qualities
Slope: 5 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Somewhat excessively drained
Capacilyofthe most limiting layerto transmit water(Ksat): High (1.98
to 5.95 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Low (about 5.0 inches)
Interpretive groups
Land capability (nonirrigated): 3e
Typical profile
0 to 17 inches: Gravelly sandy loam
17 to 32 inches: Very gravelly sandy loam
32 to 60 inches: Very gravelly coarse sand
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
USDA Natural Resources Web Soil Survey 5/27/2010
'" Conservation Service National Cooperative Soil Survey Page 1 of 1
Map Unit Description: Shalcar muck —King County Area, Washington Enticknap and Bridges Properties
Sm--Shalcar muck
Map Unit Setting
Elevation: 50 to 700 feet
Mean annual precipitation: 35 to 55 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period. 150 to 190 days
Map Unit Composition
Shalcar and similar soils: 75 percent
Minor components: 25 percent
Description of Shalcar
Setting
Landform: Flood plains
Parent material: Herbaceous organic material and/or alluvium
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Very poorly drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.57 to 1.98 in/hr)
Depth to water table: About 0 inches
Frequency of flooding: None
Frequency of ponding. Frequent
Available water capacity. High (about 10.7 inches)
Interpretive groups
Land capability (nonirrigated): 5w
Typical profile
0 to 14 inches: Muck
14 to 28 inches: Fine sandy loam
28 to 60 inches: Loamy sand
Minor Components
Tukwila
Percent of map unit. 5 percent
Landform: Depressions
Seattle
Percent of map unit. 5 percent
Landform: Depressions
Norma
Percent of map unit. 5 percent
Landform: Depressions
Puget
Percent of map unit. 5 percent
USDA Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 1 of 2
Map Unit Description: Shalcar muck —King County Area, Washington
Landform: Depressions
Snohomish
Percent of map unit. 5 percent
Landform: Depressions
Data Source Information
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
Enticknap and Bridges Properties
LISDA Natural Resources Web Soil Survey 5/2712010
a" Conservation Service National Cooperative Soil Survey Page 2 of 2
Map Unit Description: Snohomish silt loam —King County Area, Washington
Map Unit Setting
Elevation: 10 to 300 feet
Mean annual precipitation: 22 to 50 inches
Mean annual air temperature: 48 to 50 degrees F
Frost -free period. 160 to 220 days
Map Unit Composition
Snohomish and similar soils: 70 percent
Woodinville and similar soils: 20 percent
Minor components: 6 percent
Description of Snohomish
Setting
Landform: Flood plains
Parent material. Alluvium
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high (0.20 to 0.57 in/hr)
Depth to water table: About 0 to 12 inches
Frequency of flooding: Occasional
Frequency of ponding: None
Available water capacity: High (about 11.1 inches)
Interpretive groups
Land capability classification (irrigated): 5w
Land capability (nonirrigated): 5w
Typical profile
0 to 11 inches: Silt loam
11 to 17 inches: Clay loam
17 to 27 inches: Mucky peat
27 to 60 inches: Loamy fine sand
Description of Woodinville
Setting
Landform: Flood plains
Parent material. Alluvium
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.57 to 1.98 in/hr)
Depth to water table: About 0 to 12 inches
Enticknap and Bridges Properties
USDA Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 1 of 2
Map Unit Description: Snohomish silt loam —King County Area, Washington
Frequency of flooding: Frequent
Frequency of ponding. None
Available water capacity. Very low (about 1.6 inches)
Typical profile
0 to 7 inches: Silt loam
Minor Components
Seattle
Percent of map unit. 2 percent
Landform: Depressions
Tukwila
Percent of map unit.- 2 percent
Landform: Flood plains
Shalcar
Percent of map unit. 1 percent
Landform: Flood plains
Sultan
Percent of map unit. 1 percent
Data Source Information
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 6, Sep 22, 2009
Enticknap and Bridges Properties
USDA Natural Resources Web Soil Survey 5/27/2010
aim— Conservation Service National Cooperative Soil Survey Page 2 of 2
Map Unit Description: Tukwila muck —King County Area, Washington
Tu—Tukwila muck
Map Unit Setting
Elevation: 30 to 750 feet
Mean annual precipitation: 35 to 80 inches
Mean annual air temperature: 48 to 52 degrees F
Frost -free period., 150 to 200 days
Map Unit Composition
Tukwila and similar soils: 80 percent
Minor components: 20 percent
Description of Tukwila
Setting
Landform: Flood plains
Parent material: Herbaceous organic material
Properties and qualities
Slope: 0 to 1 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Very poorly drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.57 to 1.98 in/hr)
Depth to water table: About 0 inches
Frequency of flooding: None
Frequency of ponding., Frequent
Available water capacity. Very high (about 24.1 inches)
Interpretive groups
Land capability (nonirrigated): 5w
Typical profile
0 to 19 inches: Muck
19 to 60 inches: Stratified diatomaceous earth to muck
Minor Components
Seattle
Percent of map unit., 15 percent
Landform: Depressions
Bellingham
Percent of map unit. 3 percent
Landform: Depressions
Norma
Percent of map unit., 2 percent
Enticknap and Bridges Properties
USDA Natural Resources Web Soil Survey 5/27/2010
2" Conservation Service National Cooperative Soil Survey Page 1 of 2
Map Unit Description: Tukwila muck —King County Area, Washington
Landform: Depressions
Data Source Information
Enticknap and Bridges Properties
Natural Resources Web Soil Survey 5/27/2010
Conservation Service National Cooperative Soil Survey Page 2 of 2