BLD2023-1083+Critical_Area_Study+8.31.2023_9.16.14_AM+3757749 (2)WETLAND AND STREAM REPORT
Hopper Property
Edmonds, Washington
July 7, 2023
RAEDEKE ASSOCIATES, INC.
Wetland & Aquatic Sciences
Wildlife Ecology
Landscape Architecture
Report To: Daren and Kari Hopper
1005 Olympic Ave
Edmonds, WA 98020
Title: Wetland and Stream Report for the
Hopper Property
Edmonds, Washington
Project Number: 2023-058-001
Prepared by: RAEDEKE ASSOCIATES, INC.
2111 N. Northgate Way Ste. 219
Seattle, Washington, 98133
(206) 525-8122
Date: July 7, 2023
2111 N. Northgate Way Ste. 219 Seattle, WA 98133 206-525-8122 raedeke.com
Project Manager:
Project Personnel:
Submitted by:
Signature
William Russack
Printed Name
July 7, 2023
Date
William Russack, B.S
Wetland Biologist
Kolten Kosters M.S, PWS
Wetland Scientist
Wetland & Aquatic Sciences
Wildlife Ecology
Landscape Architecture
2111 N. Northgate Way Ste. 219 Seattle, WA 98133 206-525-8122 raedeke.com
TABLE OF CONTENTS
Page
LISTOF FIGURES.......................................................................................................... IV
1.0
INTRODUCTION........................................................................................................ l
1.1 Purpose..................................................................................................................1
1.2 Project Location.....................................................................................................1
2.0
METHODS...................................................................................................................2
2.1 Definitions and Methodologies..............................................................................2
2.2 Background Research............................................................................................3
2.3 Field Sampling Procedures....................................................................................3
3.0
EXISTING CONDITIONS...........................................................................................5
3.1 Results of Background Investigation.....................................................................5
3.2 Results of Field Investigations...............................................................................5
4.0
REGULATORY CONSIDERATIONS........................................................................7
4.1 Federal Clean Water Act (U.S. Army Corps of Engineers)..................................7
4.2 Washington State...................................................................................................7
4.3 City of Edmonds....................................................................................................8
5.0
PROPOSED PROJECT................................................................................................9
6.0 LITERATURE CITED...............................................................................................10
FIGURES...........................................................................................................................13
APPENDIX A: Field Survey Data................................................................................. A-1
iii
LIST OF FIGURES
Figure
Page
1.
Regional and Vicinity Map....................................................................................14
2.
U.S.D.A. Soil Conservation Service Soil Survey Map..........................................15
3.
U.S. Fish and Wildlife National Wetland Inventory..............................................16
4.
City of Edmonds GIS Map....................................................................................17
5.
Snohomish County PDS Map................................................................................18
6.
WDFW Priority Habitat and Species Map.............................................................19
7.
NFIC Fish Distribution Map..................................................................................20
8.
Proposed Site Plan.................................................................................................21
1V
1.0 INTRODUCTION
1.1 PURPOSE
Raedeke Associates, Inc. was retained by Daren and Kari Hopper to identify and
delineate any wetlands or streams on or in the vicinity of the Hopper project site, in
response to a request for critical area study by the City of Edmonds (2023a). The Hopper
project site is located at 1005 Olympic Avenue, Edmonds Washington. During our site
investigation, we collected information on vegetation, soils, and hydrology sufficient to
characterize the existing site conditions. This report presents the findings of our
background information review and our June 28, 2023, site investigation. It should be
noted that during our site investigation we did not identify any wetlands or streams on the
project site. We identified one offsite stream (Hindley Creek) approximately 110 to 120
feet west of the project site.
This report presents a summary of our findings regarding existing conditions on the
project site. This report follows the critical area reporting criteria as outlined in Edmonds
City Code (2023a).
1.2 PROJECT LOCATION
The Hopper project site is an approximately 0.31-acre parcel located at 1005 Olympic
Avenue in Edmonds, Washington (Figure 1). The project site is identified as Snohomish
County Tax Parcel No. 00766100001000 which places the project in a portion of Section
24, Township 27 North, Range 3 East, W.M. Parcel maps retrieved online from
Snohomish County (2023) PDS Map depict the property boundaries.
The project site is bordered by single-family homes to the north, west, and east, and to
the south by a shared driveway. The project site is accessed from this driveway from
Olympic Avenue.
Hopper Edmonds Raedeke Associates, Inc.
Wetland and Stream Delineation Report July 7, 2023
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2.0 METHODS
2.1 DEFINITIONS AND METHODOLOGIES
Wetlands and streams are protected by federal law as well as by state and local
regulations. Federal law (Section 404 of the Clean Water Act) prohibits the discharge of
dredged or fill material into "Waters of the United States", including certain wetlands,
without a permit from the U.S. Army Corps of Engineers (COE 2021). The COE makes
the final determination as to whether an area meets the definition of a wetland and
whether the wetland is under their jurisdiction.
The COE wetland definition was used to determine if any portions of the project area
could be classified as wetland. A wetland is defined as an area "inundated or saturated
by surface or groundwater at a frequency and duration sufficient to support, and that
under normal circumstances does support, a prevalence of vegetation typically adapted
for life in saturated soil conditions" (Federal Register 1986:41251).
We based our investigation upon the guidelines of the U. S. Army Corps of Engineers
(COE) Wetlands Delineation Manual (Environmental Laboratory 1987) and subsequent
amendments and clarifications provided by the COE (1991a, 1991b, 1992, 1994), as
updated for this area by the regional supplement to the COE wetland delineation manual
for the Western Mountains, Valleys, and Coast Region (COE 2010). The COE wetlands
manual is required by state law (WAC 173-22-035, as revised) for all local jurisdictions.
Hydrophytic vegetation is defined as "macrophytic plant life growing in water, soil or
substrate that is at least periodically deficient in oxygen as a result of excessive water
content" (Environmental Laboratory 1987). The U.S. Army Corps of Engineers National
Wetland Plant List wetland indicator status (WIS) ratings were used to make this
determination (COE 2020). The WIS ratings "reflect the range of estimated probabilities
(expressed as a frequency of occurrence) of a species occurring in wetland versus non -
wetland across the entire distribution of the species" (Reed 1988:8). Plants are rated,
from highest to lowest probability of occurrence in wetlands, as obligate (OBL),
facultative wetland (FACW), facultative (FAC), facultative upland (FACU), and upland
(UPL), respectively. In general, hydrophytic vegetation is present when the majority of
the dominant species are rated OBL, FACW, and FAC.
A hydric soil is defined as "a soil that is formed under conditions of saturation, flooding,
or ponding long enough during the growing season to develop anaerobic conditions in the
upper part" (Federal Register 1995: 35681). The morphological characteristics of the
soils in the study area were examined to determine whether any could be classified as
hydric.
According to the 1987 methodology, wetland hydrology could be present if the soils were
saturated (sufficient to produce anaerobic conditions) within the majority of the rooting
zone (usually the upper 12 inches) for at least 5% of the growing season, which in this
Hopper Edmonds Raedeke Associates, Inc.
Wetland and Stream Delineation Report July 7, 2023
area is usually at least 2 weeks (COE 1991 a). It should be noted, however, that areas
having saturation to the surface between 5% and 12% of the growing season may or may
not be wetland (COE 1991b). Depending on soil type and drainage characteristics,
saturation to the surface would occur if water tables were shallower than about 12 inches
below the soil surface during this time. Positive indicators of wetland hydrology include
direct observation of inundation or soil saturation, as well as indirect evidence such as
driftlines, watermarks, surface encrustations, and drainage patterns (Environmental
Laboratory 1987). Hydrology was further investigated by noting drainage patterns and
surface water connections between wetlands and streams within and adjacent to the
project area.
The ordinary high-water mark (OHWM) of streams and shorelines will be determined
using definitions provided by the Washington State Shorelines Management Act of 1971:
"that mark that will be found by examining the bed and banks and ascertaining where the
presence and action of waters are so common and usual, and so long continued in all
ordinary years, as to mark upon the soil a character distinct from that of the abutting
upland, in respect to vegetation." (RCW 90.58.030(2)(b) and WAC173-22-030(6). The
OHWM will be delineated using procedures outlined in the Washington Department of
Ecology (2016) Shoreline Administrators Manual.
2.2 BACKGROUND RESEARCH
Prior to conducting our site visit, we reviewed existing background maps and information
for the project site from the U.S.D.A. Natural Resource Conservation Service (MRCS
2023) Web Soil Survey, the U.S. Fish and Wildlife (USFWS 2023) National Wetland
Inventory (NWI), the City of Edmonds (2022c) Online GIS mapper, and the Snohomish
County (2023) PDS map. We also reviewed the Washington Department of Fish and
Wildlife (WDFW 2023b) Priority Habitat and Species (PHS), and the Statewide
Washington Integrated Fish Distribution (SWIFD 2023) databases to determine whether
listed or other priority fish and wildlife or their habitats were present within the project
site or its vicinity. In addition, we examined current and historical aerial photographs
(Google Earth 2023) to assist in the definition of existing plant communities, drainage
patterns, and land use.
2.3 FIELD SAMPLING PROCEDURES
We conducted a site visit on June 28, 2023, to search for wetlands, streams, or fish and
wildlife habitat that may be present on the project site or in the immediate vicinity. In
addition, we also collected sufficient information to describe the general landscape
conditions of the site.
Vegetation, soils, and hydrology were examined in representative portions of the study
area according to the procedures described in the Regional Supplement (COE 2010).
Plant communities were inventoried, classified, and described during our field
investigations. We estimated the percent coverage of each species. Plant identifications
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Wetland and Stream Delineation Report July 7, 2023
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were made according to standard taxonomic procedures described in Hitchcock and
Cronquist (2018) with nomenclature as updated by the U.S. Army Corps of Engineers
National Wetland Plant List (COE, 2020). Wetland classification follows the USFWS
wetland classification system (Cowardin et al. 1992). We determined the presence of a
hydrophytic vegetation community using the procedure described in the Regional
Supplement (COE 2010), which requires the use of the dominance test, unless positive
indicators of hydric soils and wetland hydrology are also present, in which case the
prevalence index or the use of other indicators of a hydrophytic vegetation community as
described in the Regional Supplement (COE 2010) may also be required.
We excavated pits to at least 18 inches below the soil surface, where possible, to
describe the soil and hydrologic conditions throughout the study area. We sampled soil
at locations that corresponded with vegetation sampling areas and potential wetland
areas. Soil colors were determined using the Munsell Soil Color Chart (Munsell Color
2009). We used the indicators described in the Regional Supplement (COE 2010) to
determine the presence of hydric soils and wetland hydrology.
During our site investigations, we did not identify any on -site wetlands or streams. We
did identify one off -site stream west of the project site where it traverses several private
parcels. Due to lack of access to the stream on private properties, we used satellite
imagery, LIDAR data, and other background resources to estimate the OHWM of
Hindley Creek.
Hopper Edmonds Raedeke Associates, Inc.
Wetland and Stream Delineation Report July 7, 2023
3.0 EXISTING CONDITIONS
3.1 RESULTS OF BACKGROUND INVESTIGATION
The USDA NRCS (2023) Web Soil Survey (Figure 2) identifies Alderwood-Urban land
complex soils within the limits of the project site. Alderwood soils series are derived
from glacial deposits and are not a listed hydric soil (U.S.D.A. Soil Conservation Service
1991, Federal Register 1995). Alderwood soils may contain minor components of listed
hydric soils including: Norma, McKenna, or Terric medisaprists soils. Soil series
boundaries or mapping units are mapped from aerial photographs with limited field
verification. Thus, the location and extent of boundaries between mapping units may not
be accurate for a given parcel of land within the survey area.
The USFWS (2023) NWI (Figure 3) does not depict any wetlands or streams on the
project site or within 200 feet. Wetlands and streams shown on the NWI are general in
terms of location and extent, as they are determined primarily from aerial photograph
interpretation. Thus, the number and extent of existing wetlands located within the
project area may differ from those marked on the NWI map.
The City of Edmonds (2023c) GIS Map does not depict any wetlands or streams on the
Hopper project site. It does show the presence of Hindley Creek offsite to the west,
between 1002 and 1004 Olympic Avenue (Figure 4). Measurements using the City of
Edmonds (2023b) GIS Map indicate the stream is approximately I I I feet to the west of
the Hopper property. The Snohomish County (2023) PDS map depicts a stream in the
same general location as the City of Edmonds GIS Map; the PDS map identifies this
stream as an untyped, unknown stream approximately 117 feet from the project site
(Figure 5).
The Washington Department of Fish and Wildlife (2023b) Priority Habitat and Species
database does not identify any priority species on the project site or within 300 feet
(Figure 6). The SWIFD database (2023) does not identify the offsite stream to the west
of the project site (Figure 7).
3.2 RESULTS OF FIELD INVESTIGATIONS
3.2.1 Property Description
We visited the project site on June 28, 2023 to document the existing site conditions. The
project site is currently undeveloped with a maintained lawn of Kentucky bluegrass (Poa
pratensis, FAC) and orchard grass (Dactlyis glomerata, FACU) (Sample Plot 1). Sparse
ornamental shrubs are present along the edges of the property, including Rhododendron
(Rhododendron sp.), and a Western red cedar (Thuja plicata, FAC) tree in the southeast
corner. Vegetation on the project site did not meet hydrophytic criteria.
Soils within the project site consisted of up to eight inches of very dark brown (IOYR
2/2) gravelly sandy loam underlain by at least eight inches of black (1 OYR 2/1) gravelly
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Wetland and Stream Delineation Report July 7, 2023
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sandy loam (Sample Plot 1). Soil throughout the site lacked indicators of hydric
conditions. We did not observe any primary indicators of wetland hydrology such as
surficial ponding or a shallow water table or soil saturation within the upper 12 inches of
the soil profile. We also did not observe any secondary indicators of wetland hydrology
(e.g., water -stained leaves, algal mats, drift deposits, etc.) on the project site.
3.2.2 Wetlands & Streams
During our site investigations, we did not identify any wetlands or streams on the project
site.
Offsite Stream (Hindley Creek)
During our site investigation, we confirmed the presence of a type F watercourse
(Hindley Creek) approximately 110 to 120 feet west of the project site. The stream
occupies an urbanized channel and was flowing at a rate of approximately one cubic foot
per second during the time of our visit. The stream is characterized by a gravelly sandy
bed substrate and is constrained by rip rap rock walls. Average water depth ranges from
two to four inches. Average top -of -bank width was six to eight feet, with an average
gradient of 5 to 7%. The creek flows north through the eastern portion of Snohomish
County parcel no. 00548900001213, crosses under a private driveway via a culvert, then
continues north between residential homes (Figure 4 and 5). Hindley Creek eventually
joins Shell Creek approximately 1,000 feet before the combined streams outlet to Puget
Sound.
Vegetation adjacent to the stream was characterized by ornamental deciduous trees,
rhododendron, sword fern (Polystichum munitum, FACU), and field horsetail (Equisetum
arvense, FAC).
Edmonds City Code (2023b) identifies Hindley Creek as an anadromous fish -bearing
(type F) stream. Type F streams are provided with a 100-foot buffer per Edmonds City
Code (2023b). Per GIS measurements, Hindley Creek is approximately 110 to 120 feet
west of the project site. The stream buffer primarily consists of impervious surfaces
related to the shared driveway and residential homes next to the creek, with a very narrow
band of vegetation directly adjacent to the streambed.
Hopper Edmonds Raedeke Associates, Inc.
Wetland and Stream Delineation Report July 7, 2023
4.0 REGULATORY CONSIDERATIONS
Wetlands are protected by Section 404 of the Federal Clean Water Act and other state
and local policies and ordinances including City of Edmonds (2023b) code. Regulatory
considerations pertinent to wetlands identified within the study area are discussed below;
however, this discussion should not be considered comprehensive. Additional
information may be obtained from agencies with jurisdictional responsibility for, or
interest in, the site. A brief review of the U.S. Army Corps of Engineers regulations and
City of Redmond policy, relative to wetlands, is presented below.
4.1 FEDERAL CLEAN WATER ACT (U.S. ARMY CORPS OF ENGINEERS)
Federal law (Section 404 of the Clean Water Act) discourages the discharge of dredged
or fill material into the nation's waters, including most wetlands and streams, without a
permit from the U.S. Army Corps of Engineers (COE). The COE makes the final
determination as to whether an area meets the definition of "Waters of the U.S." as
defined by the federal government (Federal Register 1986:41251), and thus, if it is
under their jurisdiction.
We should caution that the placement of fill within wetlands or other "Waters of the
U.S." without authorization from the COE is not advised, as the COE makes the final
determination regarding whether any permits would be required for any proposed
alteration (COE 2021). Because the COE makes the final determination regarding
permitting under their jurisdiction, a jurisdictional determination from the COE is
generally recommended prior to any construction activities, if any modification of
wetlands is proposed. A jurisdictional determination would also provide evaluation and
confirmation of the wetland delineations by the COE.
4.2 WASHINGTON STATE
4.2.1 Federal Clean Water Act Section 401 Certification
Under Section 401 of the Clean Water Act, an activity involving a discharge in waters
of the U.S. and authorized by the COE must also receive certification that the federally
permitted activity complies with the federal Clean Water Act, state water quality laws,
and any other appropriate state laws (such as the Water Resources Act and Hydraulic
Code). In Washington State, the certifying agency is usually the Washington
Department of Ecology (WDOE). In addition, if the COE-authorized permit is for
actions within the 15 coastal counties, including King County, then the WDOE must
confirm that the proposed action complies with the Washington Coastal Zone
Management Program.
Hopper Edmonds Raedeke Associates, Inc.
Wetland and Stream Delineation Report July 7, 2023
4.2.2 Non -Federal Jurisdictional Wetlands
The WDOE also regulates activities within isolated wetlands under the state Water
Pollution Control Act (90.48 RCW) in instances where a wetland is determined to be
non jurisdictional under the federal Clean Water Act by the COE. The standards of
review for issuance of a permit by the WDOE for activities within non-COE-
jurisdictional wetlands are the same as those for Section 401 certifications.
4.2.3 Washington State
Prior to construction or other work that will use, divert, obstruct, or change the natural
flow or bed of any state waters, approval by the Washington Department of Fish and
Wildlife (WDFW), through provisions of the State Hydraulic Code (RCW 75.20.100-
140), is required. The WDFW-administered Hydraulic Project Approval (HPA) is
intended to protect fish life from damage by construction and other activities in all marine
and fresh waters of the state. A maximum of 45 calendar days is specified in the agency
rules for a decision by WDFW to grant or deny approval of a complete application
(WDFW 2022a).
Per RCW 90.58, 200 feet landward of the OHWM of a shoreline of state significance is
considered within shoreline jurisdiction and is managed by the applicable Shoreline
Master Program. The City of Mercer Island's Shoreline Master Program is identified in
Chapter 19.13.
4.3 CITY OF EDMONDS
City of Edmonds (2023b) Code regulates wetlands and streams as critical areas.
Alterations of wetlands or streams and their buffers are generally prohibited, except as
allowed under certain conditions. All direct wetland impacts must be mitigated through
creation, restoration, or enhancement. The City of Edmonds has the final authority to
determine ratings, buffers, and allowed uses of wetlands, their buffers, and other sensitive
areas that are under their jurisdiction. During our site investigation, we did not identify
any wetlands on site or within 300 feet of the project site.
City of Edmonds (2023b) Code provides a range of buffers for streams based on the
designation of the stream type. We identified one offsite stream (Hindley Creek)
approximately 110 to 120 feet west of the project site. Hindley Creek is listed as an
anadromous fish -bearing stream (type F) according to City of Edmonds (2023a) critical
area code chapter 23.90.010A. Per City of Edmonds (2023b) code, type F streams
receive a 100-foot buffer. In addition, Edmonds City Code (2023b) chapter 23.40.280
requires a 15-foot setback from the edge of all critical area buffers.
Per GIS measurements, the project site is outside of the 100-foot buffer. In addition, the
narrowly vegetated buffer of the offsite stream is currently interrupted by a paved road
and single-family homes, providing a break in buffer functionality.
Hopper Edmonds Raedeke Associates, Inc.
Wetland and Stream Delineation Report July 7, 2023
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5.0 PROPOSED PROJECT
During our June 28, 2023, field investigation, we verified the presence of Hindley Creek
approximately 110 to 120 feet west of the project site. Due to lack of permission to
access private property, we estimated the OHWM of Hindley Creek using GIS analysis,
LIDAR, and other background maps and resources. Per Edmonds City Code (2023b),
Hindley Creek is a type F stream and therefore receives a 100-foot buffer. A 15-foot
critical area setback is also required from the edge of the buffer. No portion of the
project site is encumbered by the 100-foot stream buffer, and the area of the buffer
between the project site and Hindley Creek is characterized by impervious surfaces and
existing single-family residences.
The applicant is proposing construction of a new single-family residence with a deck,
patio, and pool (Figure 8). In addition, the proposed plan includes two utility easements
that result in a reorientation of the property line. The proposed project does not include
any impacts to Hindley Creek or its buffer.
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6.0 LITERATURE CITED
Cowardin, L., F. Golet, V. Carter, and E. LaRoe. 1992. Classification of wetlands and
deepwater habitats of the United States. U.S.D.I. Fish and Wildlife Service Publ.
FWS/OBS-79/31. 103 pp.
Edmonds, City of. 2023a. Critical Areas Determination (CRA2023-0095). June 8, 2023
letter to Harold Hopper.
Edmonds, City of. 2023b. Title 23 Natural Resources. Current through May 23, 2023.
Available at htt2s://www.codepublishing.com/WA/Edmonds/#!/Edmonds23
/Edmonds23.html
Edmonds, City of 2023c. City of Edmonds GIS Viewer. Available at https://maps.
edmondswa.gov/Html5Viewer/?viewer=Edmonds_SSL.HTML. Accessed July
2023.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual.
Technical Report Y-87-1, US Army Engineers Waterways Experiment Station,
Vicksburg, Mississippi. 100 pp.
Federal Register. 1986. 40 CFR Parts 320 through 330: Regulatory programs of the
Corps of Engineers; final rule. Vol. 51. No. 219. pp. 41206-41260, U.S.
Government Printing Office, Washington, D.C.
Federal Register. 1995. U.S. Department of Agriculture, Soil Conservation Service:
Changes in Hydric Soils of the United States. Volume 59, No 133, July 13, 1994.
Revised September 15, 1995.
Google Earth. 2023. Image for 47.81831'-122.36293 ° in Snohomish County, WA.
2023 Google. Accessed June 2023.
Hitchcock, C., and A. Cronquist. 2018. Flora of the Pacific Northwest. Second Edition.
Univ. of Washington Press, Seattle, Washington. 926 pp.
Hruby, T. 2014. Washington State wetlands rating system for western Washington:
2014 Update. Washington State Department of Ecology, Publication No. 14-06-
029. October 2014.
Munsell Color. 2009. Munsell soil color charts. Munsell Color, Grand Rapids, MI.
Northwest Indian Fisheries Commission. 2023. Statewide Washington Integrated Fish
Distribution (SWIFD). https:Hgeo.nwifc.or /sg wifd/. Accessed June 2023.
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Reed, P.B., Jr. 1988. National list of plant species that occur in wetlands: Northwest
(Region 9). U.S.D.I. Fish and Wildlife Service. Biological Report 88 (26.9).
89 pp.
Snohomish County. 2023. PDS Map Portal, Snohomish County Planning and
Development Services. https://snohomishcoij t a.gov/3752/PDS-Map-Portal.
Accessed July 2023.
U.S. Army Corps of Engineers. 1991a. Special notice. Subject: Use of the 1987
wetland delineation manual. U.S. Army Corps of Engineers, Seattle District.
August 30, 1991.
U.S. Army Corps of Engineers. 1991b. Memorandum. Subject: Questions and answers
on the 1987 manual. U.S. Army Corps of Engineers, Washington D.C. October
7, 1991. 7 pp. including cover letter by John P. Studt, Chief, Regulatory Branch.
U.S. Army Corps of Engineers. 1992. Memorandum. Subject: Clarification and
interpretation of the 1987 methodology. U.S. Army Corps of Engineers,
Washington D.C., March 26, 1992. 4 pp. Arthur E. Williams, Major General,
U.S.A. Directorate of Civil Works.
U.S. Army Corps of Engineers. 1994. Public Notice. Subject: Washington regional
guidance on the 1987 wetland delineation manual. May 23, 1994, Seattle District.
8 pp.
U.S. Army Corps of Engineers. 2010. Regional supplement to the Corps of Engineers
wetland delineation manual: western mountains, valleys, and coast region
(Version 2.0). Wakeley, J.S., R.W. Lichvar, and C.V. Noble, eds. May 2010.
ERDC/EL TR-10-3. U.S. Army Engineer Research and Development Center,
Vicksburg, MS.
U.S. Army Corps of Engineers. 2020. National Wetland Plant List, version 3.5. U.S.
Army Corps of Engineers, Engineer Research and Development Center, Cold
Regions Research and Engineering Laboratory, Hanover, NH. Available at:
hqps:Hcwbigpp.sec.usace.qM.mil/nLyPI static/data/DOC/lists_2020/Re ig ons/pdf
/reg WMVC_2020v1.pd£ Last accessed June 2022.
U.S. Army Corps of Engineers. 2021. Special Public Notice. Final Seattle District 2017
Nationwide Permit Regional Conditions for Nationwide Permits for the Seattle
District Corps of Engineers for the State of Washington. U.S. Army Corps of
Engineers, Seattle District. March 3, 2021.
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U.S. Army Corps of Engineers. 2022. Special Public Notice. Regional Conditions for
Seattle District — 2022 Nationwide Permits Final 41. U.S. Army Corps of
Engineers, Seattle District. February 14, 2022.
U.S.D.A. Natural Resources Conservation Service. 2023. On-line Web Soil Survey.
http://websoilsurvey.nres.usda.gov. Accessed June 2023.
U.S.D.A. Soil Conservation Service. 1991. Hydric soils of the United States: In
cooperation with the National Technical Committee for Hydric Soils. U.S.D.A.
Miscellaneous Publication Number 1491.
U.S. Fish and Wildlife Service. 2023. National Wetland Inventory, Wetlands Online
Mapper. http://wetlandsfws.er.usgs.gov/wtlnds/launch.html. Accessed July 2023.
Washington Department of Ecology. 2016. Determining the ordinary high water mark
for Shoreline Management Act compliance in Washington State. WDOE Pub.
# 16-06-029.
Washington Department of Fish and Wildlife. 2023a. Hydraulic Project Approval.
htlp://wdfw.wa.gov/licensingLhp .
Washington Department of Fish and Wildlife. 2023b. Priority Habitat and Species
database. https://geodataservices.wdfw.wa.gov/hp/phs/. Accessed June 2023.
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Wetland and Stream Delineation Report July 7, 2023
FIGURES
MACDON
NE 31 st Way
,kWth PI
laz Artisan Cakes
E 27th PI -a
NE 26th Ct
NE 26th PI
NE 27th PI NE 27th PI NE 27th Ar
Google
FIGURE 1
REGIONAL & VICINITY MAP
MAGDGNIALD PROPERTY
SAMMAMISH, WA
r4
edeke
Associates, In,
2111 N. Northgate Way, Ste. 219
Seattle, WA 98135
MACDON
NE 31 st Way
,kWth PI
laz Artisan Cakes
E 27th PI -a
NE 26th Ct
NE 26th PI
NE 27th PI NE 27th PI NE 27th Ar
Google
FIGURE 1
REGIONAL & VICINITY MAP
MAGDGNIALD PROPERTY
SAMMAMISH, WA
r4
edeke
Associates, In,
2111 N. Northgate Way, Ste. 219
Seattle, WA 98135
MACDON
NE 31 st Way
,kWth PI
laz Artisan Cakes
E 27th PI -a
NE 26th Ct
NE 26th PI
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Google
FIGURE 1
REGIONAL & VICINITY MAP
MAGDGNIALD PROPERTY
SAMMAMISH, WA
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2111 N. Northgate Way, Ste. 219
Seattle, WA 98135
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FIGURE 1
REGIONAL & VICINITY MAP
MAGDGNIALD PROPERTY
SAMMAMISH, WA
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Associates, In,
2111 N. Northgate Way, Ste. 219
Seattle, WA 98135
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NE 26th Ct
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NE 27th PI NE 27th PI NE 27th Ar
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FIGURE 1
REGIONAL & VICINITY MAP
MAGDGNIALD PROPERTY
SAMMAMISH, WA
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Associates, In,
2111 N. Northgate Way, Ste. 219
Seattle, WA 98135
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FIGURE 1
REGIONAL & VICINITY MAP
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2111 N. Northgate Way, Ste. 219
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Google
FIGURE 1
REGIONAL & VICINITY MAP
MAGDGNIALD PROPERTY
SAMMAMISH, WA
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Associates, In,
2111 N. Northgate Way, Ste. 219
Seattle, WA 98135
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PROJECT INFORMATION
HEIGHT CALCULATIONS
ZONING CALCULATIONS
OWNER NAME:
HOPPER
A=+103.0'
LOT AREA:
14,325 SF
B = +113.5'
SITE ADDRESS:
1005 OLYMPIC AVE
C = +113.5.
LOT COVERAGE:
ALLOWABLE
EDMONDS, WA 98020
D = +104.0'
35% OF 14,325 SF:
5,013.75 SF
EXISTING HOUSE FOOTPRINT:
3,417 SF
TAX ACCOUNT#:
00766100001000
AVERAGE GRADE = 108.5'
EXISTING FRONT DECK:
240 SF
MAXIMUM = 133.5'
EXISTING FRONT PORCH:
174 SF
ZONING:
RS-12
EXISTING SHED:
160 SF
EXISTING GREENHOUSE:
792 SF
BUILDING HEIGHT:
25-0" MAX
PROPOSED COVERAGE:
4,783 SF
LEGAL DISCRIPTION:
SEA MOUNTAIN ESTATES BILK 000 D-00
LOT 10
STROBL
DESIGN LLC
1122 N J ST
TACOMA, WA 98403
PHONE: (206) 6613622
REGISTERED
ARCHITECT
JACOB A STROBL
STATE OF WASHINGTON
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I REVISIONS I BY I
Date 5/16/2023
Scale
Drawn 1/5"
Job
Sheet
A2
APPENDIX A
Field Survey Data
WETLAND DETERMINATION DATA FORM — Western Mountains, Valleys, and Coast Region
Project/Site: Hopper Edmonds City/County: Edmonds, WA Sampling Date:6/28/23
Applicant/Owner: Daren Hopper State: WA Sampling Point: SP 1
Investigator(s): Will Russack Section, Township, Range: S24.T27N.R3E
Landform (hillslope, terrace, etc.): slope Local relief (concave, convex, none): convex Slope (%): 1-3
Subregion (LRR): Northwest forest Lat: 47.818236 Long:-122.362947 Datum: WGS84
Soil Map Unit Name: Alderwood-Urban Land complex NWI classification: none
Are climatic / hydrologic conditions on the site typical for this time of year? Yes ® No ❑ (If no, explain in Remarks.)
Are Vegetation Soil or Hydrology significantly disturbed? Are "Normal Circumstances" present? Yes ® No ❑
Are Vegetation Soil or Hydrology naturally problematic? (If needed, explain any answers in Remarks.)
SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc.
Hydrophytic Vegetation Present? Yes ❑ No ®
Is the Sampled Area
Hydric Soil Present? Yes ❑ No ®
within a Wetland? Yes ❑ No
Wetland Hydrology Present? Yes ❑ No
Remarks: sample plot in center of undeveloped parcel
VEGETATION — Use scientific names of plants.
Absolute
Dominant Indicator
Dominance Test worksheet:
Tree Stratum (Plot size: 3m)
% Cover
Species? Status
Number of Dominant Species
1.
That Are OBL, FACW, or FAC: 1 (A)
2.
Total Number of Dominant
3•
Species Across All Strata: 2 (B)
4.
Percent of Dominant Species
= Total Cover
That Are OBL, FACW, or FAC: 50 (A/B)
Sapling/Shrub Stratum (Plot size: 2m)
1,
Prevalence Index worksheet:
2,
Total % Cover of: Multiply by:
3.
OBL species 0 x 1 = 0
4,
FACW species 0 x 2 = 0
5,
FAC species 60 x 3 = 180
= Total Cover
FACU species 40 x 4 = 160
Herb Stratum (Plot size: 1 m)
UPL species 0 x 5 = 0
1. Poa pratensis (Kentucky bluegrass
50
Y FAC
Column Totals: 100 (A) 340 (B)
2. Dactylis glomerata (orchard grass)
40
Y FACU
3. Trifolium repens (white clover)
5
N FAC
Prevalence Index = B/A = 3_4
4. Ranunculus repens (creeping buttercup)
5
N FAC
Hydrophytic Vegetation Indicators:
5
❑ 1 - Rapid Test for Hydrophytic Vegetation
g
❑ 2 - Dominance Test is >50%
7
❑ 3 - Prevalence Index is <_3.0'
8
❑ 4 - Morphological Adaptations' (Provide supporting
data in Remarks or on a separate sheet)
9.
❑ 5 - Wetland Non -Vascular Plants'
10.
❑ Problematic Hydrophytic Vegetation' (Explain)
11.
'Indicators of hydric soil and wetland hydrology must
100
= Total Cover
be present, unless disturbed or problematic.
Woody Vine Stratum (Plot size: )
1.
Hydrophytic
2.
Vegetation
0
= Total Cover
Present? Yes ❑ No
% Bare Ground in Herb Stratum 100
Remarks:
US Army Corps of Engineers Western Mountains, Valleys, and Coast —Version 2.0
SOIL
Sampling Point: SP 1
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' Loc2
Texture Remarks
0-8 10YR 2/2
Gr.S.L
8-16+ 10YR 2/1
Gr.S.L
'Type: C=Concentration, D=De letion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all
LRRs, unless otherwise noted.)
Indicators for Problematic Hydric Soils3:
❑ Histosol (Al)
❑ Sandy Redox (S5)
❑ 2 cm Muck (Al0)
❑ Histic Epipedon (A2)
❑ Stripped Matrix (S6)
❑ Red Parent Material (TF2)
❑ Black Histic (A3)
❑ Loamy Mucky Mineral (F1) (except MLRA 1)
❑ Very Shallow Dark Surface (TF12)
❑ Hydrogen Sulfide (A4)
❑ Loamy Gleyed Matrix (F2)
❑ Other (Explain in Remarks)
❑ Depleted Below Dark Surface (Al 1)
❑ Depleted Matrix (F3)
❑ Thick Dark Surface (Al2)
❑ Redox Dark Surface (F6)
'Indicators of hydrophytic vegetation and
❑ Sandy Mucky Mineral (S1)
❑ Depleted Dark Surface (F7)
wetland hydrology must be present,
❑ Sandy Gleyed Matrix (S4)
❑ Redox Depressions (F8)
unless disturbed or problematic.
Restrictive Layer (if present):
Type:
Depth (inches):
Hydric Soil Present? Yes ❑ No
Remarks: no indicators of hydric soils observed
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) (except MLRA
❑ Water -Stained Leaves (139) (MLRA 1, 2,
❑ High Water Table (A2)
1, 2, 4A, and 46)
4A, and 413)
❑ Saturation (A3)
❑ Salt Crust (B11)
❑ 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 Imagery (C9)
❑ Drift Deposits (133)
❑ Oxidized Rhizospheres along Living Roots (C3)
❑ Geomorphic Position (D2)
❑ Algal Mat or Crust (134)
❑ Presence of Reduced Iron (C4)
❑ Shallow Aquitard (D3)
❑ Iron Deposits (135)
❑ Recent Iron Reduction in Tilled Soils (C6)
❑ FAC-Neutral Test (D5)
❑ Surface Soil Cracks (136)
❑ Stunted or Stressed Plants (D1) (LRR A)
❑ Raised Ant Mounds (D6) (LRR A)
❑ Inundation Visible on Aerial Imagery (137)
❑ Other (Explain in Remarks)
❑ Frost -Heave Hummocks (D7)
❑ Sparsely Vegetated Concave Surface (138)
Field Observations:
Surface Water Present? Yes ❑ No ®
Depth (inches):
Water Table Present? Yes ❑ No ®
Depth (inches):
Saturation Present? Yes ❑ No ®
Depth (inches):
Wetland Hydrology Present? Yes ❑ No
includes capillary fringe)
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks: no hydrology observed
US Army Corps of Engineers Western Mountains, Valleys, and Coast —Version 2.0