Loading...
Wetland and Stream Report - Hopper_Interrupted BufferRECEIVED July 27, 2023 CITY OF EDMONDS PLANNING & DEVELOPMENT DEPARTMENT 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 2 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 Hopper Edmonds Raedeke Associates, Inc. Wetland and Stream Delineation Report July 7, 2023 0 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 Hopper Edmonds Raedeke Associates, Inc. Wetland and Stream Delineation Report July 7, 2023 2 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 I 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. Hopper Edmonds Raedeke Associates, Inc. Wetland and Stream Delineation Report July 7, 2023 10 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. Hopper Edmonds Raedeke Associates, Inc. Wetland and Stream Delineation Report July 7, 2023 11 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. Hopper Edmonds Raedeke Associates, Inc. Wetland and Stream Delineation Report July 7, 2023 12 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. Hopper Edmonds Raedeke Associates, Inc. Wetland and Stream Delineation Report July 7, 2023 FIGURES D z 10th Ave N Approximate Project Location Just Flower` �`Q rofiw®^ ��_ F—o'l-,v Res ��. r y Bar 9Otympic View Deli I au9 PuQe��r Grace Lut ran Church Edmonds V O Elementary School csners sr `\/ sub, cir Diving It Edmonds Food Bankv s v.i. of Livein THE BOWL 0FEDMONDS card way z nter Is - Q Holy Trinity Edmonds I.". (\ Dainsr spr.�,esc \ 3 Villa Rivarola® n Hummingbird _ Hill Park — - aeu s Frances Anderson Center ae. vo qie 1< 3 v D 0 1< 3 a 0' D cfl Tr ®Argonaut Diving Scuba Classes Vista way 3 D FIGURE 1 - Regional & Vicinity Map Hopper Property Edmonds 1005 Olympic Ave, Edmonds, WA RAI PROJECT: 2023-058-001 PREPARED: 7/5/23 BY: W R \/:_1_ rll VV 9111 N. Northgate Way, Suite 219 Seattle, WA 9818E 1-1 Brookmere Djr i FIGURE 2 - NRCS Soils Map AN • NG' roperty - Edmonds 74V Map Unit Symbol Map Unit Name r�T105 Oly iic Ave, Edmonds, WA A' coomplex, 21ft`ttbt RAI P )JECT: 2023-058-001 Oaedeke 7pes PREPARED: 7/5/23 kssociates. Inc. I Aldemood-Urb--'a.,�no— BY: WR 9111 N. North ate Wa complex, 8 to 15 percent g y' slopes Suite 219 Seattle, WA 9$1ss Wetlands FIGURE 3 - National Wetland Inventory AN ® Estuarine and Marine Deepwater . Lake Hopper Property - Edmonds ❑ Estuarine and Marine Wetland ❑ Other 1005 Olympic Ave, Edmonds, WA Freshwater Emergent Wetland ® Riverine RAI PROJECT: 2023-058-001 ITaedeke © Freshwater Forested/Shrub Wetland ciates. Inc. ❑ Freshwater Pond PREPARED: 7/5/23 BY: WR 9111 N. Northgate Way, Image source: https://www.fws.gov/wetlands/data/mapper.html# Suite 219 Seattle, WA 9818s k t I *WWI � Lim 1 M � Approximate Project in a Location Legend = Creeks Seismic Hazard Areas Earth Subsidence and Landslide I L! Minimum Buffer Adjacent toHa2 Wetlands Wetlands Boundary — - Wetland Boundaries Not Completel Wetland Known Extents Floodplains ® A ® AE ® VE ® X Contour Lines — 10 — 50; 100 Landslide Hazard Area 40% ❑ Severe Erosion Hazard 15%-40% ❑ Erosion Hazard Areas 15%-40% FIGURE 4 - Edmonds GIS n Hopper Property - Edmonds 1005 Olympic Ave, Edmonds, WA RAI PROJECT: 2023-058-001 Ottedeke PREPARED: 7/5/23 kssociates. Inc. BY: WR 9111 N. Northgate Way, Image source: https://maps.edmondswa.gov/Html5Viewer/?viewer=Edmonds—SSL.HTML Suite 219 Seattle, WA 9818s EV-- Approximate Project Location Legend Snohomish County Tax Parcels All Fish Distributions Snohomish County Streams Shoreline of Statewide Significance Fish Habitat • Non -fish Habitat Perennial Non -fish Habitat Seasonal - Unknown, Untyped V Snohomish County Water Bodies Shoreline of Statewide Significance FIGURE 5 - Snohomish County PDS Map ^N Hopper Property - Edmonds 1005 Olympic Ave, Edmonds, WA RAI PROJECT: 2023-058-001 1111111aedeke PREPARED: 7/5/23 kssociates, Inc. BY: WR 9111 N. Northgate Way, Suite 219 Seattle, WA 98133 tlsH . Priority Habitats and Species on the Web II'ILDW E W_ WNW fir .IR ' w �► : -61 I111111111"Pl*-0 41VS:jjftjw - Mir, � L Buffer radius: 300 Feet Report Date: 06/22/2023 dk. j Not to scale Je I Hat FIGURE 6 - WDFW Priority Habitat & Species /� N Legend: Hopper Property - Edmonds � -- - 30o ft Buffer 1005 Olympic Ave, Edmonds, WA - Mapped Species or RAI PROJECT: 2023-058-001 0aedeke Habitat PREPARED: 7/5/23 Xssociates. Inc. SOURCE INFORMATION: Washington Fish and Wildlife Priority Habitat & BY: WR 2111 N. Northgate Way, Species Online Mapping tool - http://apps.wdfw.wa.gov/phsontheweb/ Suite 219 Seattle, WA 98188 AP: ro Not to scale FIGURE 7 - NFIC Statewide Fish Distribution Map "N Hopper Property - Edmonds 1005 Olympic Ave, Edmonds, WA RAI PROJECT: 2023-058-001 Oaedeke PREPARED: 7/5/23 Xssociates. Inc. BY: WR 2111 N. Northgate Way, Image source: https://geo.nwifc.org/swifd/ Suite 21s Seattle, WA 9813E FIGURE 8 - Proposed Site Plan STRBL DESIGN LLC Hopper Property - Edmonds leaedeke 1005 Olympic Ave, Edmonds, WA Associates, Inc. 1122 N J ST RAI PROJECT: 2023-058-001 2111 N. Northgate Way, Suite 219 Seattle, WA 98183 TACOMA, WA 98403 PHONE:(206) 6613622 ly .. _�. �`-�-{};.SZ O REGISTERED ARCHITECT �'� '—. —Q O O � O — _ FOUND REBAR�(1YP.) `,'01CCRE '. JACOB A STROBL � � .\ .' a . � STATE OF WASHINGTON — 10' UT/L/ry �gSEMENT r _ `` — — _ _ P ROPOSED PROPERTY LINE,,' t ----' PROPOSED10'\' UTIL. EST. ECO—BLOCK RET. WALL 96sso URRENT PROPERTY LINE' 70 1 , _ +I' y L —------------------- ` `-- _ — � B 16.96' +113.5' HT GA LG � El °n"", % moIREPP7 L- -- - I �` ❑ PR�JPERTY LINE x I /Z I I x I100,a 1e ;O UJ I W S89' g4'S3°E 20.00' / IL -A % D- Lu f ; U- I 20' UTILITY EASEMENT 1, I Lu bOEI'J I U) s -- ------ --� IPCe . w °a o;. a. 2% II p 4 .' L — — — — — — — — — +104.0HTA ' P 13.5°- G G. . 4L°a o�D nLWL/ 2Qa U IzIM DNa ° � Zvi I` :a4 00 Oat o 191.30, S89' 44'53"E�� % �Y % — — _ —. —..—. —.. —.��.. PRBPERT — ; — —.. —. —.. —..—.. 1�..—..—..—. REVISIONS BY LINE 25' Private Rd. 12•CW ;; F ------- ----------------------------�------------------- ----------------------^t---------------------------------- i- \ NORTH O SITE PLAN I/a" = 1'-0" (D 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 Date 5/16/2023 TAX ACCOUNT#: 00766100001000 EXISTING HOUSE FOOTPRINT: 3,417 SF AVERAGE GRADE = 108.5' EXISTING FRONT DECK: 240 SF Scale ZONING: RS-12 MAXIMUM = 133.5' EXISTING FRONT PORCH: 174 SIF Drawn 1/5" EXISTING SHED: 160 SF BUILDING HEIGHT: 25-0" MAX EXISTING GREENHOUSE: PROPOSED COVERAGE: 792 SF 4,783 SF Job LEGAL DISCRIPTION: SEA MOUNTAIN ESTATES BILK 000 D-00 Sheet LOT 10 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