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CRA20050051#rzu ', 111111 City of Edmonds Development Services Department Planning Division Phone: 425.771.0220 Fax: 425.771.0221 The Critical Areas Checklist contained on this form is to be filled out by any person preparing a Development Permit Application for the City of Edmonds prior to his/her submittal of the application to the City. The purpose of the Checklist is to enable City staff to determine whether any potential Critical Areas are, or may be, present on the subject property. The information needed to complete the Checklist should be easily available from observations of the site or data available at City Hall (Critical areas inventories, maps, or soil surveys). Date Received: 4 A City Receipt #: 2 (, Critical Areas File #: o1QOS on5 / Critical Areas Checklist Fee: 135.00 Date Mailed to Applicant: 005 A property owner, or his/her authorized representative, must fill out the checklist,. sign and date it, and submit it to the City. The City will review the checklist, make a precursory site visit, and make a determination of the subsequent steps necessary to complete a development permit application. Please submit a vicinity map, along with the signed copy of this form to assist City staff in finding and locating the specific piece of property described on this form. In addition, the applicant shall include other pertinent information (e.g. site plan, topography map, etc.) or studies in conjunction with this Checklist to assistant staff in completing their preliminary assessment of the site. The undersigned applicant, and his/her/its heirs, and assigns, in consideration on the processing of the application agrees to release, indemnify, defend and hold the City of Edmonds harmless from any and all damages, including reasonable attorney's fees, arising from any action or infraction based in whole or part upon false, misleading, inaccurate or incomplete information furnished by the applicant, his/her/its agents or employees. By my signature, I certify that the information and exhibits herewith submitted are true and correct to the best of my knowledge and that I am authorized to file this a lica 'on on the behalf of the owner as listed below. SIGNATURE OF APPLICANT/AGENT U DATE Ll I (A 5 Property Owner's Authorization By my signature, I certify that I have authorized the above Applicant/Agent to apply for the subject land use application, and grant my permission for the public officials and the staff of the City of Edmonds to enter the subject property for the purposes of inspection and posting attendant to this application. SIGNATURE OF OWNER _ C` f ., ) DATE PLEASE PRINT CLEARLY Owner/Applicant: / Vr11C 4 Name O lJ Street Address City State Zip Telephone: 77 S' " '�7 S-i Email address (optional): Applicant Representative: S Z-Irl� IJ re Sa ""o Name " 82-3 / 1/K (.J Street Address It-lu 4 /lQo G,A 18.�75 City State Zip Telephone: /-/2 Y� '-O / / 0 9 3 Email Address (optional): Ste v 1' k u.r Critical Areas Checklist Site Information (soils/ topography/ hydrology/ vegetation) 1. Site Address/ Location: �2 3 2. 3. 4. Property Tax Account Number: ,� CA File No: t Approximate Site Size (acres or square feet): -7 a c r-e- Is this site currently developed? 2yes; no. If yes; how is site developed? _,,66/a 't� /71 �`.� /5� PERMIT COUNTER 5. Describe the general site topography. Check all that apply. Flat: less than 5-feet elevation change over entire site. Rolling: slopes on site generally less than 15% (a vertical rise of 10-feet over a horizontal distance of 66-feet). Hilly: slopes present on site of more than 15% and less than 30% (a vertical rise of 10-feet over a horizontal distance of 33 to 66-feet). Steep: grades of greater than 30% present on site (a vertical rise of 10-feet over a horizontal distance of less than 33-feet). / Other (please describe): D�,_ L �J' �� 0wlz k .��.�r s�i ©S 6. Site contains areas of year-round standing water: ; Approx. Depth: 7. Site contains areas of seasonal standing water: ; Approx. Depth: What season(s) of the year? 8. Site is in the floodway floodplain of a water course. 9. Site contains a creek or an area where water flows across the grounds surface? Flows are year-round? Flows are seasonal? (What time of year? ). 10. Site is primarily: forested ; meadow ;shrubs ; mixed urban landscaped (lawn, shrubs etc) 11. Obvious wetland is present on site: ke- o�-j For City Staff Use Only 1. Plan Check Number, if applicable? 2. Site is Zoned? R 5 In1- I Z.. 3. SCS mapped soil type(s)? 1 A (Acr vvu A - Ckr b A ( e,,A C--f cc„ it- 3 4 MNK I+ -to MuGV- 4. Critical Areas inventory or C.A. map indicates Critical Area on site? Yea Fn_x n �-L, e C-0 S ian 6&-t3 wt 3- V 5. Site within designated earth subsidence landslide hazard area? DETERMINATION STUDY REQUIRED WAIVER Reviewed by: /"dQ.E+ = Date: 5/ 161/L-v5- VItHA—A idlt- -A .Da ?lOary A'- c A-,&. di 2—s _ v CITY OF EDMONDS CRITICAL AREAS RECONNAISSANCE REPORT Site Location: 23609 - 74`h Avenue W. Tax Acct. Number: 27043200300600 Determination: Study Required Determination #: CA-05-51 Applicant: Steve Lawrence (POA for owner) Owner: Nancy Lawrence CRITICAL AREAS RECONAISSANCE REPORT: STUDY REQUIRED (CA-05-51) During review and inspection of the subject site, it was found that the site may contain critical areas, including a Wetland, Frequently Flooded Areas, Erosion Hazard Areas, and Fish and Wildlife Habitat Conservation Areas pursuant to Chapter 23.40 of the Edmonds Community Development Code (ECDC). GENERAL CRITICAL AREAS REPORT REQUIREMENTS Critical Areas Reports identify, classify and delineate any areas on or adjacent to the subject property that may qualify as critical areas. They also assess these areas and identify any potential impacts resulting from your specific development proposal. If a specific development proposal results in an alteration to a critical area the critical areas report will also contain a mitigation plan. You have the option of completing the portion of the study that classifies and delineates the critical areas and waiting until you have a specific development proposal to complete the study. You may also choose submit the entire study with your specific development application. Please review the minimum report requirements for all types of Critical Areas which are listed in ECDC 23.40.090.D. There are additional report requirements for different types of critical areas (see below). Note that it is important for the report to be prepared by a qualified professional as defined in the ordinance. There are options on how to complete a critical areas study and an approved list of consultants that you may choose from. You may contact the Planning Division for more information. General Mitigation Requirements for all Critical Areas are discussed in ECDC 23.40.110 through 23.40.140. REPORT REQUIREMENTS - WETLANDS The site investigation has shown that the site may contain a wetland. Wetlands are areas inundated or saturated by ground or surface water that support, under normal circumstances, vegetation adapted for life in saturated soil. • Wetlands are generally rated according to their size, condition, function, and vegetation types into four (4) different categories described in ECDC 23.50.010 and by use of the "City of Edmonds Wetland Field Data Form" by the critical areas consultant. • Buffer widths for wetlands vary depending on the category of the wetland as listed in ECDC 23.50.040.F. • In addition to the general requirements for Critical Areas reports referenced above, there are specific Critical Areas report requirements for wetlands that are provided in ECDC 23.50.030. • Note for Lake Ballinger: See ECDC 23.50.010 regarding delineating wetlands around Lake Ballinger. Provisions for protection of Lake Ballinger shorelines not meeting criteria for jurisdictional wetlands are provided in the City of Edmonds Shoreline Master Program, which requires a 35-foot setback from the Ordinary High Water Mark. DEVELOPMENT PROPOSALS ASSOCIATED WITH WETLANDS Development proposals that encroach into wetlands or their buffers or building setbacks may be allowed through the approval of certain processes. • The width of a wetland buffer may be reduced through buffer enhancement if the criteria described in ECDC 23.50.040.F.3 can be met. The maximum amount that a buffer can be reduced through buffer enhancement is 50%. • A buffer may also be modified through a process called buffer averaging. The criteria applied to buffer averaging are listed in ECDC 23.50.040.F.4. The maximum amount that the buffer width can be reduced at any single location through buffer averaging is 50%. • Development proposals that proposed encroachments into buffers beyond what is allowed through the above methods require a Critical Areas Variance, or a Reasonable Use Exception. If you think that you have a proposal that may require one of these processes, please contact a Planner for more information. • Any time a development proposal requires an alteration to a wetland, a mitigation plan is required as part of the Critical Areas report. In addition to the General Mitigation requirements referenced above, mitigation requirements specific to wetlands are provided in ECDC 23.50.050. • NOTE: There are specific performance standards for the subdivision of lands in wetlands and wetland buffers. These are listed in ECDC 23.50.060. STUDY REQUIREMENT — FREQUENTLY FLOODED AREAS It appears that this property contains or is adjacent to Frequently Flooded Areas. • Frequently Flooded Areas are those areas identified on FEMA Flood Insurance Rate Maps as areas of special flood hazard, which include those lands in the floodplain subject to a one percent or greater chance of flooding in any given year. • Frequently Flooded Areas are further defined in ECDC 23.70.010.A and B. • In addition to the general requirements for Critical Areas reports referenced above, specific Critical Area report requirements for Frequently Flooded Areas are provided in ECDC 23.70.020. DEVELOPMENT PROPOSALS ASSOCIATED WITH FREQUENTLY FLOODED AREAS Development is restricted within Frequently Flooded Areas. • Development standards and provisions for protection of frequently flooded areas are provided as applicable to areas of special flood hazard in the current editions of the International Residential Code and the International Building Code (ECDC 23.70.040). • Conformance with the provisions for flood hazard reduction of the current editions of the International Residential Code and International Building Code shall constitute conformance with ECDC 23.40.050, Protection of critical areas, per the mandates of the Washington Growth Management Act and the purposes and objectives of the Environmentally Critical Areas Ordinance. STUDY REQUIREMENT — EROSION HAZARD AREA It appears that this property contains or is adjacent to an Erosion Hazard Area. • Erosion Hazard areas include Alderwood and Everett series soils on slopes of 15 percent or greater. among others. • Landslide Hazard Areas are further defined in ECDC 23.80.020.A. • In addition to the general requirements for Critical Areas reports referenced above, specific Critical Area report requirements for Erosion Hazard Areas (which are one of the Geologically Hazardous Areas) are provided in ECDC 23.80.050. 2 • Note that Stable Erosion Hazard Areas may have limited report requirements at the director's discretion. At a minimum an erosion and sediment control plan prepared in compliance with the requirements in ECDC Chapter 18.30 shall be required. DEVELOPMENT PROPOSALS ASSOCIATED WITH EROSION HAZARD AREAS Development is restricted within an Erosion Hazard Area. • Projects that will intrude into these areas will require a report by a licensed Geotechnical Engineer or other qualified professional. • Development standards are given in ECDC 23.80.060 and 23.80.070. STUDY REQUIREMENT — FISH AND WILDLIFE HABITAT CONSERVATION AREAS Since the site is within a mapped fish and wildlife habitat conservation area, the City would like to preserve as much of the native vegetation as possible. DEVELOPMENT PROPOSALS ON A SITE WITH FISH AND WILDLIFE HABITAT CONSERVATION AREAS The applicant must submit a clearing/tree cutting plan with any development permit. Tree cutting and clearing of native vegetation shall be limited to the footprint of development. ALLOWED ACTIVITIES Certain activities are allowed in or near critical area buffers as specified in ECDC 23.40.20. If you have any questions about whether your proposed development qualifies as an allowed activity, please contact a Planner for more information. EXEMPT DEVELOPMENT PROPOSALS Certain development proposals may be exempt from Critical Areas Requirements (ECDC 23.40.230). If you think that a specific development proposal may be exempt, contact a Planner for more information. Name Sid'Kature Date NOTE: Cited sections of the Edmonds Community Development Code (ECDC) can be found on the City of Edmonds website at www.ci.edmonds.wa.us. Wetlalfdl�eoowo o Ar - s � r�,/ Delineation / Mitigation / Restoration / Habitat Creation / Permit Assistance 9505 19th Avenue S.E. Suite 106 Everett, Washington 98208 (425) 337-3174 Fax (425) 337-3045 CRITICAL AREA STUDY FOR LAWRENCE / CA-05-51 Wetland Resources, Inc. Project #05215 Prepared By: Wetland Resources, Inc. 9505 19th Ave. SE Suite 106 Everett, WA 98208 (425) 337-3174 For: City of Edmonds Attn: Meg Gruwell 121 5In Ave. North Edmonds, WA 98020 August 17, 2005 Revision #1: September 9, 2005 TABLE OF CONTENTS SITE DESCRIPTION 1 WETLAND CLASSIFICATION - COWARDIN SYSTEM 1 WETLAND CLASSIFICATION - CITY OF EDMONDS 1 BUILDING SETBACK 2 WETLAND DETERMINATION REPORT 2 BOUNDARY DETERMINATION FINDINGS 4 FUNCTIONS AND VALUES ASSESSMENT 4 WILDLIFE 5 USE OF THIS CRITICAL AREAS STUDY 5 REFERENCES 6 FIELD DATA 7 CRITICAL AREAS STUDY MAP 1/1 SITE DESCRIPTION Wetland Resources, Inc. conducted a wetland delineation in July of 2005 to locate jurisdictional wetlands and streams on the approximate 0.87 acre site located at 23609 74t" Ave. W. in the city of Edmonds, Washington. The site is located as a portion of Section 32, Township 27N, Range 4E, W.M. This site is accessed from the west via 74t' Ave W. The lot currently contains a single-family residence in the western portion, with an associated outbuilding. The property slopes to Lake Ballinger with an eastern aspect. Areas of the site not occupied by the house consist of maintained lawn. The center of the site appears to contain old fill soil. Surrounding land use consists of single-family residences to the north, south and west, with Lake Ballinger to the east. A Category 4 Wetland associated with Lake Ballinger is located in the eastern portion of the property. This property is located within 200 feet of Lake Ballinger. As such, this property is within the Suburban Residential IV Shoreline Environment. Category 4 Wetlands in the city of Edmonds typically receive 35-foot protective buffers. The Shoreline buffer for this area is also 35-feet. WETLAND CLASSIFICATION - COWARDIN SYSTEM According to the Cowardin System, as described in Classification of Wetlands and Deepwater Habitats of the United States, the on -site wetland is classified as follows: Wetland: Palustrine, Emergent Wetland, Semi- permanently flooded. WETLAND CLASSIFICATION - CITY OF EDMONDS Under ECDC, chapter 23.50.010, the on -site wetland is classified as follows: Wetland Category 4: This lake fringe wetland associated with Lake Ballinger received a score of 25 on the City of Edmonds Wetland Field Data Form. Category 4 wetlands in the city of Edmonds typically receive 35 -foot protective buffers. At the discretion of the Director, Critical area tracts may be required in development proposals for subdivisions, short subdivisions, and planned unit developments. These critical area tracts shall delineate and protect those contiguous critical areas and buffers greater than five thousand (5,000) square feet. The director may require that critical area tracts be dedicated to the city, to be held in an undivided interest by each owner of a building lot within the development with the ownership interest passing with the ownership of the lot, or held by an incorporated homeowner's association or other legal entity (such as a land trust), which ensures the ownership, maintenance, and protection of the tract and contains a provision to assess costs associated therewith. (EDCD 23.40.270) Critical Area Study Wetland Resources, Inc. Lawrence/CA-05-51 Project # 05215 BUILDING SETBACK Pursuant to ECDC 23.40.280: Unless otherwise provided, buildings and other structures shall be set back a distance of fifteen (15) feet from the edges of all critical areas, if no buffers are required. The following may be allowed in the building setback area: • Landscaping • Uncovered Decks • Building overhangs, if such overhangs do not exceed more than eighteen (18) inches into the setback area; and • Impervious ground surfaces, such as driveways and patios, provided that such improvements may be subject to water quality regulations as adopted in Chapter 19. WETLAND DETERMINATION REPORT Methodology On site, routine methodology as described in the Washington State Wetlands Identification and Delineation Manual (Washington State Department of Ecology Publication #96-94, March 1997), was used for this determination, as required by the City of Edmonds during the permitting process. Under this method, the process for making a wetland determination is based on three sequential steps: 1) Examination of the site for hydrophytic vegetation (species present and percentage cover). 2) If hydrophytic vegetation is found, then the presence of hydric soils is determined. 3) Determination of the presence of wetland hydrology in the area examined under the first two steps. Vegetation Criteria The Washington State Wetlands Identification and Delineation Manual, 1997 edition, defines hydrophytic vegetation as the sum total of macrophytic plant life that occurs in areas where the frequency and duration of inundation or soil saturation produce permanently or periodically saturated soils of sufficient duration to exert a controlling influence on the plant species present. One of the most common indicators for hydrophytic vegetation is when more than 50 percent of a plant community consists of species rated "Facultative" and wetter on lists of plant species that occur in wetlands. Soil Criteria and Mapped Description The Washington State Wetlands Identification and Delineation Manual, 1997 edition, defines hydric soils as those that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions Critical Area Study 2 Wetland Resources, Inc. Lawrence/CA-05-51 Project #05215 in the upper part. Field indicators are used for determining whether a given soil meets the definition and criteria for hydric soils. The soils underlying the site are mapped in the Soil Survey of Snohomish County Area Washington as Alderwood-Urban land complex, 8 to 15 percent slopes, and Mukilteo muck. Alderwood- Urban land complex, 8 to 15 percent slopes: This map unit is on till plains. This unit is about 60 percent Alderwood gravelly sandy loam and about 25 percent urban land. Included in this unit are small areas of Everett and Indianola soils on terraces and outwash plains, Kitsap soils on terraces and terrace escarpments, and Ragnar soils on outwash plains. Included areas make up about 15 percent of the total acreage. Alderwood soil is moderately deep and moderately well drained. It formed in glacial till. Typically, the surface layer is very dark grayish brown gravelly sandy loam about 7 inches thick. The upper part of the subsoil is dark yellowish brown and dark brown very gravelly sandy loam about 23 inches thick. A weakly cemented hardpan is at a depth of about 35 inches. Depth to the hardpan ranges from 20 to 40 inches. Permeability of the Alderwood soil is moderately rapid above the hardpan and very slow through it. Available water capacity is low. Urban land consists of areas that are covered by streets, buildings, parking lots, and other structures that obscure or alter the soils so that identification is not possible. Mukilteo muck: This soil is very deep, very poorly drained, and found in depressional areas. It formed in organic material primarily derived from sedges. Typically, the upper layer is dark reddish brown muck about 4 inches thick. The next layer is dark reddish brown and black organic material about 31 inches thick. Included in this unit are areas of Terric Medisaprists, Orcas peat, and Mukilteo soils that have not been artificially drained. Included areas make up about 10 percent of the total acreage. Permeability of this Mukilteo soil is moderate. Runoff is ponded, and available water capacity is high. Hydrology Criteria The Washington State Wetlands Identification and Delineation Manual, 1997 edition, states that "areas which are seasonally inundated and/or saturated to the surface for a consecutive number of days greater than or equal to 12.5% of the growing season are wetlands, provided the soil and vegetation parameters are met. Areas inundated or saturated between 5 and 12.5% of the growing season in most years may or may not be wetlands. Areas saturated to the surface for less than 5% of the growing season are non -wetlands." Field indicators are used for determining whether wetland hydrology parameters are met. Critical Area Study 3 Wetland Resources, Inc. Lawrence/ CA-05-51 Project # 05215 BOUNDARY DETERMINATION FINDINGS Category 4 Wetland: This wetland is located across the eastern side of the property on the fringe of Lake Ballinger. Maintained lawn makes up most of the vegetation in this wetland. Species found in the lawn are colonial bentgrass (Agrostis tenuis, Fac), bird's -foot trefoil (Lotus corniculatus, Fac), white clover (Trifolium repens, Fac) and curly dock (Rumex crispus, Fac+). Soils in this wetland have a Munsell color of brown (10 YR 4/3) and a texture of loamy sand from 0 to 4 inches below the surface. From 4 to 18 inches the soils have a Munsell color of black (10YR 2/1) and a texture of muck. Soils were dry to moist during our July 2005 site investigation. Non -Wetland Areas: Vegetation in the non -wetland portions of the site is comprised mostly of maintained lawn. Species present include colonial bentgrass and white clover. Typical soils in the portions of the property mapped as non -wet have a Munsell color of dark brown (10 YR 3/3) and a texture of sandy loam from 0 to 18 inches below the surface. Soils sampled in the upland areas of the site were dry during our July 2005 site visit. FUNCTIONS AND VALUES ASSESSMENT METHODOLOGY The methodology for this functions and values assessment is based on professional opinion developed through past field analyses and interpretation. This assessment pertains specifically to this site, but is typical for assessments of similar systems common to western Washington. FUNCTIONS AND VALUES COMPONENTS Wetlands in western Washington perform a variety of ecosystem functions. Included among the most important functions provided by wetlands are stormwater control, water quality improvement, fish and wildlife habitat, aesthetic value, recreational opportunities, and education. The most commonly assessed functions are discussed. Assessments of these functions for the project site are provided below. EXISTING CONDITIONS The on -site wetland, located along the fringe of Lake Ballinger. In this association with Lake Ballinger, the wetland provides good stormwater storage values. It also improves water quality by filtering pollutants and sediment from overland flow entering the lake. Because the wetland is relatively small and dominated by maintained lawn, its water quality functions are limited. Grass is an effective means of filtering, but aspects of lawn care such as fertilizer might limit this function. Some opportunity for wildlife habitat is provided by the fact that this wetland is a fringe habitat between the upland vegetation and the open water of Lake Ballinger. Critical Area Study 4 Wetland Resources, Inc. Lawrence/CA-05-51 Project # 05215 This habitat function is limited because of surrounding development. Overall, given the proximity of development and the lack of woody vegetation, this wetland provides a relatively low level of functions and values. WILDLIFE Several species of bird were noted during our site investigation. These include American robin, winter wren, and black -capped chickadee. Given this wetland's association with Lake Ballinger, other resident and migratory species would be expected to utilize the site during some portion of their lives. No herpetofauna were noted. USE OF THIS REPORT This Critical Area Study is supplied to the City of Edmonds as a means of describing jurisdictional wetland conditions, as required by the City of Edmonds during the permitting process. This report is based largely on readily observable conditions and to a lesser extent, on readily ascertainable conditions. No attempt has been made to determine hidden or concealed conditions. Reports may be adversely affected due to the physical condition of the site and the difficulty of access, which may lead to observation or probing difficulties. The laws applicable to wetlands are subject to varying interpretations and may be changed at any time by the courts or legislative bodies. This report is intended to provide information deemed relevant in the applicant's attempt to comply with the laws now in effect. The work for this report has conformed to the standard of care employed by wetland ecologists. No other representation or warranty is made concerning the work or this report and any implied representation or warranty is disclaimed. Wetland Resources, Inc. Louis Emenhiser Senior Wetland Ecologist Critical Area Study 5 Wetland Resources, Inc. Lawrence/CA-05-51 Project # 05215 REFERENCES City of Edmonds Code Chapter 20.15B Critical Areas. Classification of Wetlands and Deepwater Habitats of the United States. FWS/OBS- 79/31. December 1979. U.S. Department of the Interior, Fish and Wildlife Service. Washington, D.C. Corps of Engineers Wetlands Delineation Manual, 1987. Technical Report Y-87-1. Environmental Laboratory. U.S. Army Engineer Waterway Experiment Station. Vicksburg, MS. Soil Survey of Snohomish County Area Washington United States Department of Agriculture, Soil Conservation Service (1978). National List of Plant Species that Occur in Wetlands, Northwest Region. 1996. U.S. Department of the Interior, Fish and Wildlife Service. Washington, D.C. Washington State Wetlands Identification and Delineation Manual. Washington State Department of Ecology. Publication #96-94. March 1997. Critical Area Study 6 Wetland Resources, Inc. Lawrence/CA-05-51 Project #05215 Field Data Sheet Lawrence/CA-05-51 - WRI# 05215 - Investigation Date: July 5, 2005 Pit Depth Texture Color Moisture Species % Status Strata S1 0-4" Loamy Sand 10YR 4/3 dry Agrostis tenuis 80 Fac Herb Wetland 4-18" Muck 10YR 2/1 moist Lotus corniculatus 10 Fac Herb Trifolium repens 5 Fac Herb Rumex crispus 5 Fac+ Herb Conclusion: Wetland - Parameters for hydrophytic vegetation, hydric soils, and wetland hydrology are met. S2 0-18" Sandy Loam 10YR 3/3 dry Agrostis tenuis 70 Fac Herb Non -Wetland Trifolium repens 5 Fac Herb Conclusion: Non -wetland - Parameters for hydric soils and wetland hydrology are not met. 7 -1991mbr- N6�iq Scale 1 " = 30' 0 30 60 [EX. GAR WETLAND ®® DATA SITES CRITICAL AREA STUDY LAWRENCE CA - 05-51 PORTION OF SECTION 32, TOWNSHIP 27N, RANGE 4, W.M. ILI CATEGORY 4 WETLAND 35' BUFFER �35 ,1, v v EX. PIER leWetWhd17MMrces -k _ fbl — m / Miti-h— / Re t—a w / ! ADIUt C-000 / P—t tis^- 9505 19th Avenue S.E. Suite 106 Everett, Wa shin¢ ton 98208 Phone: (425) 337-3174 Fax: (425) 337-3045 Email: mailbox@wetlandresources.com CRITICAL AREA STUDY LAWRENCE CA - 05 - 51 EDMONDS, WA City of Edmonds Sheet 1 /1 Development Services Dept. WRI Job #05215 Attn. Meg Gruwell Drawn by: L. Emenhiser 121 5th Avenue N Date: 8/17/2005 Edmonds, WA 98020 Revision #1: 9/09/05 Delineation / Mitigation / Restoration Habitat Creation / Permit Assistance 9505 19th Avenue S.E. Suite 106 Everett, Washington 98208 (425) 337-3174 Fax (425) 337-3045 CRITICAL AREA STUDY FOR LAWRENCE / CA-05-51 Wetland Resources, Inc. Project #05215 Prepared By: Wetland Resources, Inc. 9505 19th Ave. SE Suite 106 Everett, WA 98208 (425) 337-3174 For: City of Edmonds Attn: Meg Gruwell 121 5th Ave. North Edmonds, WA 98020 August 17, 2005 Revision #1: September 9, 2005 TABLE OF CONTENTS SITE DESCRIPTION 1 WETLAND CLASSIFICATION - COWARDIN SYSTEM 1 WETLAND CLASSIFICATION - CITY OF EDMONDS 1 BUILDING SETBACK Z WETLAND DETERMINATION REPORT Z BOUNDARY DETERMINATION FINDINGS 4 FUNCTIONS AND VALUES ASSESSMENT 4 WILDLIFE 5 USE OF THIS CRITICAL AREAS STUDY 5 REFERENCES. 6 FIELD DATA 7 CRITICAL AREAS STUDY MAP 1/1 SITE DESCRIPTION Wetland Resources, Inc. conducted a wetland delineation in July of 2005 to locate jurisdictional wetlands and streams on the approximate 0.87 acre site located at 23609 74�' Ave. W. in the city of Edmonds, Washington. The site is located as a portion of Section 32, Township 27N, Range 4E, W.M. This site is accessed from the west via 70 Ave W. The lot currently contains a single-family residence in the western portion, with an associated outbuilding. The property slopes to Lake Ballinger with an eastern aspect. Areas of the site not occupied by the house consist of maintained lawn. The center of the site appears to contain old fill soil. Surrounding land use consists of single-family residences to the north, south and west, with Lake Ballinger to the east. A Category 4 Wetland associated with Lake Ballinger is located in the eastern portion of the property. This property is located within 200 feet of Lake Ballinger. As such, this property is within the Suburban Residential IV Shoreline Environment. Category 4 Wetlands in the city of Edmonds typically receive 35-foot protective buffers. The Shoreline buffer for this area is also 35-feet. WETLAND CLASSIFICATION - COWARDIN SYSTEM According to the Cowardin System, as described in Classification of Wetlands and Deepwater Habitats of the United States, the on -site wetland is classified as follows: Wetland: Palustrine, Emergent Wetland, Semi- permanently flooded. WETLAND CLASSIFICATION - CITY OF EDMONDS Under ECDC, chapter 23.50.010, the on -site wetland is classified as follows: Wetland Category 4: This lake fringe wetland associated with Lake Ballinger received a score of 25 on the City of Edmonds Wetland Field Data Form. Category 4 wetlands in the city of Edmonds typically receive 35 -foot protective buffers. At the discretion of the Director, Critical area tracts may be required in development proposals for subdivisions, short subdivisions, and planned unit developments. These critical area tracts shall delineate and protect those contiguous critical areas and buffers greater than five thousand (5,000) square feet. The director may require that critical area tracts be dedicated to the city, to be held in an undivided interest by each owner of a building lot within the development with the ownership interest passing with the ownership of the lot, or held by an incorporated homeowner's association or other legal entity (such as a land trust), which ensures the ownership, maintenance, and protection of the tract and contains a provision to assess costs associated therewith. (EDCD 23.40.270) Critical Area Study Wetland Resources, Inc. Lawrence/CA-05-51 Project # 05215 BUILDING SETBACK Pursuant to ECDC 23.40.280: Unless otherwise provided, buildings and other structures shall be set back a distance of fifteen (15) feet from the edges of all critical areas, if no buffers are required. The following may be allowed in the building setback area: • Landscaping • Uncovered Decks • Building overhangs, if such overhangs do not exceed more than eighteen (18) inches into the setback area; and • Impervious ground surfaces, such as driveways and patios, provided that such improvements may be subject to water quality regulations as adopted in Chapter 19. WETLAND DETERMINATION REPORT Methodology On site, routine methodology as described in the Washington State Wetlands Identification and Delineation Manual (Washington State Department of Ecology Publication #96-94, March 1997), was used for this determination, as required by the City of Edmonds during the permitting process. Under this method, the process for making a wetland determination is based on three sequential steps: 1) Examination of the site for hydrophytic vegetation (species present and percentage cover). 2) If hydrophytic vegetation is found, then the presence of hydric soils is determined. 3) Determination of the presence of wetland hydrology in the area examined under the first two steps. Vegetation Criteria The Washington State Wetlands Identification and Delineation Manual, 1997 edition, defines hydrophytic vegetation as the sum total of macrophytic plant life that occurs in areas where the frequency and duration of inundation or soil saturation produce permanently or periodically saturated soils of sufficient duration to exert a controlling influence on the plant species present. One of the most common indicators for hydrophytic vegetation is when more than 50 percent of a plant community consists of species rated "Facultative" and wetter on lists of plant species that occur in wetlands. Soil Criteria and Mapped Description The Washington State Wetlands Identification and Delineation Manual, 1997 edition, defines hydric soils as those that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions Critical Area Study 2 Wetland Resources, Inc. Lawrence/CA-05-51 Project #05215 in the upper part. Field indicators are used for determining whether a given soil meets the definition and criteria for hydric soils. The soils underlying the site are mapped in the Soil Survey of Snohomish County Area Washington as Alderwood-Urban land complex, 8 to 15 percent slopes, and Mukilteo muck. Alderwood- Urban land complex, 8 to 15 percent slopes: This map unit is on till plains. This unit is about 60 percent Alderwood gravelly sandy loam and about 25 percent urban land. Included in this unit are small areas of Everett and Indianola soils on terraces and outwash plains, Kitsap soils on terraces and terrace escarpments, and Ragnar soils on outwash plains. Included areas make up about 15 percent of the total acreage. Alderwood soil is moderately deep and moderately well drained. It formed in glacial tilt. Typically, the surface layer is very dark grayish brown gravelly sandy loam about 7 inches thick. The upper part of the subsoil is dark yellowish brown and dark brown very gravelly sandy loam about 23 inches thick. A weakly cemented hardpan is at a depth of about 35 inches. Depth to the hardpan ranges from 20 to 40 inches. Permeability of the Alderwood soil is moderately rapid above the hardpan and very slow through it. Available water capacity is low. Urban land consists of areas that are covered by streets, buildings, parking lots, and other structures that obscure or alter the soils so that identification is not possible. Mukilteo muck: This soil is very deep, very poorly drained, and found in depressional areas. It formed in organic material primarily derived from sedges. Typically, the upper layer is dark reddish brown muck about 4 inches thick. The next layer is dark reddish brown and black organic material about 31 inches thick. Included in this unit are areas of Terric Medisaprists, Orcas peat, and Mukilteo soils that have not been artificially drained. Included areas make up about 10 percent of the total acreage. Permeability of this Mukilteo soil is moderate. Runoff is ponded, and available water capacity is high. Hydrology Criteria The Washington State Wetlands Identification and Delineation Manual, 1997 edition, states that "areas which are seasonally inundated and/or saturated to the surface for a consecutive number of days greater than or equal to 12.5% of the growing season are wetlands, provided the soil and vegetation parameters are met. Areas inundated or saturated between 5 and 12.5% of the growing season in most years may or may not be wetlands. Areas saturated to the surface for less than 5% of the growing season are non -wetlands." Field indicators are used for determining whether wetland hydrology parameters are met. Critical Area Study 3 Wetland Resources, Inc. Lawrence/CA-05-51 Project # 05215 BOUNDARY DETERMINATION FINDINGS Category 4 Wetland: This wetland is located across the eastern side of the property on the fringe of Lake Ballinger. Maintained lawn makes up most of the vegetation in this wetland. Species found in the lawn are colonial bentgrass (Agrostis tenuis, Fac), bird's -foot trefoil (Lotus corniculatus, Fac), white clover (Trifolium repens, Fac) and curly dock (Rumex crispus, Fac+). Soils in this wetland have a Munsell color of brown (10 YR 4/3) and a texture of loamy sand from 0 to 4 inches below the surface. From 4 to 18 inches the soils have a Munsell color of black (10YR 2/1) and a texture of muck. Soils were dry to moist during our July 2005 site investigation. Non -Wetland Areas: Vegetation in the non -wetland portions of the site is comprised mostly of maintained lawn. Species present include colonial bentgrass and white clover. Typical soils in the portions of the property mapped as non -wet have a Munsell color of dark brown (10 YR 3/3) and a texture of sandy loam from 0 to 18 inches below the surface. Soils sampled in the upland areas of the site were dry during our July 2005 site visit. FUNCTIONS AND VALUES ASSESSMENT METHODOLOGY The methodology for this functions and values assessment is based on professional. opinion developed through past field analyses and interpretation. This assessment pertains specifically to this site, but is typical for assessments of similar systems common to western Washington. FUNCTIONS AND VALUES COMPONENTS Wetlands in western Washington perform a variety of ecosystem functions. Included among the most important functions provided by wetlands are stormwater control, water quality improvement, fish and wildlife habitat, aesthetic value, recreational opportunities, and education. The most commonly assessed functions are discussed. Assessments of these functions for the project site are provided below. EXISTING CONDITIONS The on -site wetland, located along the fringe of Lake Ballinger. In this association with Lake Ballinger, the wetland provides good stormwater storage values. It also improves water quality by filtering pollutants and sediment from overland flow entering the lake. Because the wetland is relatively small and dominated by maintained lawn, its water quality functions are limited. Grass is an effective means of filtering, but aspects of lawn care such as fertilizer might limit this function. Some opportunity for wildlife habitat is provided by the fact that this wetland is a fringe habitat between the upland vegetation and the open water of Lake Ballinger. Critical Area Study 4 Wetland Resources, Inc. Lawrence/CA-05-51 Project #05215 This habitat function is limited because of surrounding development. Overall, given the proximity of development and the lack of woody vegetation, this wetland provides a relatively low level of functions and values. WILDLIFE Several species of bird were noted during our site investigation. These include American robin, winter wren, and black -capped chickadee. Given this wetland's association with Lake Ballinger, other resident and migratory species would be expected to utilize the site during some portion of their lives. No herpetofauna were noted. USE OF THIS REPORT This Critical Area Study is supplied to the City of Edmonds as a means of describing jurisdictional wetland conditions, as required by the City of Edmonds during the permitting process. This report is based largely on readily observable conditions and to a lesser extent, on readily ascertainable conditions. No attempt has been made to determine hidden or concealed conditions. Reports may be adversely affected due to the physical condition of the site and the difficulty of access, which may lead to observation or probing difficulties. The laws applicable to wetlands are subject to varying interpretations and may be changed at any time by the courts or legislative bodies. This report is intended to provide information deemed relevant in the applicant's attempt to comply with the laws now in effect. The work for this report has conformed to the standard of care employed by wetland ecologists. No other representation or warranty is made concerning the work or this report and any implied representation or warranty is disclaimed. Wetland Resources, Inc. Louis Emenhiser Senior Wetland Ecologist Critical Area Study 5 Wetland Resources, Inc. Lawrence/CA-05-51 Project #05215 REFERENCES City of Edmonds Code Chapter 20.15B Critical Areas. Classification of Wetlands and Deepwater Habitats of the United States. FWS/OBS- 79/31. December 1979. U.S. Department of the Interior, Fish and Wildlife Service. Washington, D.C. Corps of Engineers Wetlands Delineation Manual, 1987. Technical Report Y-87-1. Environmental Laboratory. U.S. Army Engineer Waterway Experiment Station. Vicksburg, MS. Soil Survey of Snohomish County Area Washington United States Department of Agriculture, Soil Conservation Service (1978). National List of Plant Species that Occur in Wetlands, Northwest Region. 1996. U.S. Department of the Interior, Fish and Wildlife Service. Washington, D.C. Washington State Wetlands Identification and Delineation Manual. Washington State Department of Ecology. Publication #96-94. March 1997. Critical Area Study 6 Wetland Resources, Inc. Lawrence/CA-05-51 Project # 05215 Field Data Sheet Lawrence/CA-05-51 - WRI# 05215 Investigation Date: July 5, 2005 Pit Depth Texture Color Moisture Species % Status Strata S1 0-4" Loamy Sand 10YR 4/3 dry Agrostis tenuis 80 Fac Herb Wetland 4-18" Muck 10YR 2/1 moist Lotus corniculatus 10 Fac Herb Trifolium repens 5 Fac Herb Rumex crispus 5 Fac+ Herb Conclusion: Wetland - Parameters for hydrophytic vegetation, hydric soils, and wetland hydrology are met. S2 0-18" Sandy Loam 10YR 3/3 dry Agrostis tenuis 70 Fac Herb Non -Wetland Trifolium repens 5 Fac Herb Conclusion: Non -wetland - Parameters for hydric soils and wetland hydrology are not met. 7 Scale 1 " = 30' 0 30 60 oc WETLAND ® ® DATA SITES EX. GAR CRITICAL AREA STUDY LAWRENCE CA — 05-51 PORTION OF SECTION 32, TOWNSHIP 27N, RANGE 4, W.M. CATEGORY 4 WETLAND 35' BUFFER �--3 5' mQ EX. PIER Wg6a1fd Resoy1-z' z /hc. nam— i'nttlezHon i aescaaam i wy-t creani vem+11 :,:913� 9505 19th Avenue S.E. Suite 106 EverettMashin¢ton 98208 Phone: (425) 337-3174 Fax: (425) 337-3045 Email: mailbox@wetlandresources.com CRITICAL AREA STUDY LAWRENCE CA - 05 - 51 EDMONDS, WA City of Edmonds Sheet 1 /1 Development Services Dept. WRI Job #05215 Attn. Meg Gruwell Drawn by: L. Emenhiser 121 5th Avenue N Date:8/17/2005 Edmonds, WA 98020 Revision #1: 9/09/05