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23-105471-SEPA Checklist-11-09-23Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 1 of 15 SEPA ENVIRONMENTAL CHECKLIST Purpose of Checklist Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. Instructions for Applicants This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use “not applicable” or "does not apply" only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. Instructions for Lead Agencies Please adjust the format of this template as needed. Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. Use of Checklist for Nonproject Proposals For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B plus the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words “project,” “applicant,” and “property or site” should be read as “proposal,” “proponent,” and “affected geographic area,” respectively. The lead agency may exclude (for non-projects) questions in Part B - Environmental Elements –that do not contribute meaningfully to the analysis of the proposal. Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 2 of 15 A.BACKGROUND 1. Name of proposed project, if applicable: Afrasiabi Residential Repair 2. Name of applicant: John Stevenson 3. Address and phone number of applicant and contact person: Applicant's Adress: 7001 Seaview Ave NW, STE 16O pmb 43 Seattle, WA 98117 Applicant’s Phone Number: (206) 375-8735 Authorized Agent: Soundview Consultants, Attn: Racheal Villa Authorized Agent’s Adress: 2907 Harborview Drive, Suite D Gig Harbor, WA 98355 Authorized Agent’s Phone Number: (253) 514-8952 4. Date checklist prepared: November 7th, 2023 5. Agency requesting checklist: City of Federal Way 6. Proposed timing or schedule (including phasing, if applicable): Start Date: November 2023 End Date: December 2024 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. Currently there are no future plans for additions, expansion, or further activity in relation to this proposal. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A geotechnical assessment; an archaeological and cultural resource report; shoreline, wetland, and fish and wildlife habitat assessment; and shoreline vegetation management conservation plan. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. No permits are currently submitted or pending. 10. List any government approvals or permits that will be needed for your proposal, if known. Permits needed for proposal (based on pre-application meeting with City of Federal Way): shoreline substantial development permit, floodplain permit, building permit, use process III permit and SEPA environmental review. 11. Give brief, complete description of your proposal, including the proposed uses and the size of the Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 3 of 15 project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) The project proposes a series of slope stabilization and residential structural stabilization and repair actions along the subject property shoreline to restore the site following a landslide that took place in late December of 2022. The landslide caused a portion of the deck attached to the residence and the main shoreline bluff to destabilize and slide down the slope into the existing bulkhead. Due to the force from the slide, the upland materials pushed an approximately 20-foot linear section of bulkhead into the upper shore zone (USZ). Repair and stabilization of the residence will occur landward of the 50-foot shoreline buffer and will consist of restoring the attached deck and implementing three retaining walls along the top of slope. One retaining wall will tie into the existing concrete block wall along the deck and the southeast extent (top) of the landslide area, and the second retaining wall will run along the prior, preexisting top of slope area. The third wall will be located halfway up the concrete stairs and will be in line with the start of the upper wall. The walls will be five (5) to fifteen (15) feet in height and will be secured via soldier pile, with an additional 110 square foot triangular shotcrete wall utilized for additional site access stabilization in the north. The retaining walls will be backfilled with suitable soil material the tops may be planted to provide additional stabilization to help restore the top of slope. Overall, the retaining walls will provide structural support beneath and immediately north of the residence in the affected area. Shoreline stabilization actions will consist of a mid-slope stabilization and a toe of slope stabilization. The mid-slope stabilization will be provided between elevations 60 feet and 90 feet above mean sea level over an approximately 1,547-square-foot area located perpendicular to the shoreline. The slope stabilization actions will occur landward of the 50- foot shoreline buffer. The slope will be stabilized using a rockfall protection mesh with 50 mm opening and 3.8 mm wire securely drilled into the slope (Tecco Mat). The lower portion of the affected slope area from the delineated OHW to approximately +20 feet NAVD88 consists of a gradual slope. This portion of the slope is fully within the 50-foot shoreline buffer and will be enhanced with native trees and shrubs and reseeded to minimize erosion and restore shoreline ecological functions. Additionally, the entire 50-foot shoreline setback within the landslide area will be replanted with live willow stakes to further stabilize the slope. The section of bulkhead displaced by the landslide will be restored to its preexisting condition by lifting the existing riprap blocks and placing them in their original position landward of OHW. The proposed bulkhead realignment will be performed during low tide to minimize erosion potential, and access will be provided via a neighboring parcel or barge. No impacts to existing eelgrass beds are proposed. All actions are the minimum necessary to restore and stabilize the shoreline and associated residential structures. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. Street Address: 3620 SW Dash Point Road, Federal Way, WA 98023 ¼ Section: NE Section: 11 Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 4 of 15 Township: 21N Range: 03E B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site: Flat Rolling Hilly Steep Slopes Mountainous Other b. What is the steepest slope on the site (approximate percent slope)? Approximately 80 percent slope c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. The NRCS soil survey map identifies two soil series on the subject property: Alderwood and Kitsap soils, very steep (AkF), and Indianola loamy sand, 5 to 15 percent slopes (InC). Both Alderwood and Kitsap soils, very steep and Indianola loamy sand, 5 to 15 percent slopes are listed as non-hydric on the NRCS hydric soils list; however, Indianola loamy sand, 5 to 15 percent slopes is identified with up to 2 percent inclusions of hydric Norma soils (NRCS, 11/23). d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. In relation to surface indications or history of unstable soils, the geotechnical report states: “the subject slide event was triggered because of a broken water line that discharged water along the slope surface. It should be noted that the slide was not the result of naturally occurring processes, and to our understanding, no indications of slope instability had been noted before the slide. This condition is generally corroborated through our review of local mapping resources, lidar data, and aerial photographs of the area. The induced movement resulted in the creation of a large washout feature and carried soil, deck and patio elements, and other debris down gradient and was ultimately deposited at the base of the slope. The slide also displaced an existing rockery that serves as a bulkhead at the shoreline. Based on our evaluations, the slide initiated within the medium dense silty sand to poorly graded sand unit. It is unclear if, or to what extent, the denser silty sand and sand and silt-dominated soils were mobilized during the event. However, surficial exposures of these units can be seen along the exposed slope face, particularly from the base of the slope. Since the event, it appears that no further mass soil movement has occurred. Localized riling is apparent along the slope face and is likely attributed to rainfall and the absence of vegetation along the slide scarp.” (Earth Solutions, 2023) e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill. Shoreline stabilization measures will be implemented along the face of the subject property shoreline to stabilize the property following a landslide. Repair and stabilization of the residence will include implementing three retaining walls along the top of slope. One retaining wall will tie into the existing concrete block wall along the deck and the southeast extent (top) of the landslide area, and the second retaining wall will run along the prior, preexisting top of slope area. The Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 5 of 15 third wall will be located halfway up the concrete stairs and will be in line with the start of the upper wall. The walls will be five (5) to fifteen (15) feet in height and will be secured via soldier pile, with an additional 110 square foot triangular shotcrete wall utilized for additional site access stabilization in the north. The retaining walls will be backfilled with suitable clean upland soil material from an approved site above the shotcrete. Bulkhead repair will involve restoring the existing rockery bulkhead “in-kind” utilizing existing, salvageable materials that are present in the area. The project intends to excavate the displaced rockery and reestablish the existing keyway in general alignment with areas of the rockery that were undisturbed. See the site plan for location of slope stabilization and associated fill material onsite. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. No clearing is proposed. The purpose of the project is to limit erosion through the introduction of slope supporting objects such as soldier pile wall placement, anchored Tecco Mat placement, upland of the 50-foot shoreline buffer and slope revegetation with native plants and bulkhead repair in place using existing materials. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? No new impervious surfaces are proposed. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Soldier pile wall placement, anchored Tecco Mat placement, and slope revegetation, see above. 2. Air a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. No anticipated change in long term air emissions are proposed. Emissions associated with construction equipment and machinery may minorly increase during the duration of the project. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. No off-site emissions or odor affect the proposal. c. Proposed measures to reduce or control emissions or other impacts to air, if any: No anticipated change in air emissions is proposed. Proper maintenance and operation of existing equipment and machinery is proposed. 3. Water a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. The marine waters of Dumas Bay (Puget Sound) are adjacent to the northern boundary of the subject parcel. Approximately 350 feet offsite, the waterbody of Joe Creek Joes runs parallel to the eastern border of the subject property and flows into Dumas Bay. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 6 of 15 Yes, project plans will be submitted with this checklist. 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. No proposed fill or dredge to be placed in or removed from surface water onsite. restoring the existing rockery bulkhead “in-kind” utilizing existing, salvageable materials that are present in the area. The project intends to excavate the displaced rockery and reestablish the existing keyway in general alignment with areas of the rockery that were undisturbed. No new substrate or soil materials are proposed within the shoreline buffer and near the water 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. No proposed surface water withdrawals or diversions. 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. Yes, project plans with floodplain location will be submitted with this checklist and the project applications. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No proposed discharges of waste materials to surface waters. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. No proposed withdrawal of groundwater for purposes of drinking water or other purposes. No proposed discharge of water to the ground water. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: domestic sewage; industrial, containing the following chemicals. . . ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. No anticipated change in waste over current facility operations is proposed. The proposal is limited to repairing the existing bulkhead with existing materials onsite, stabilizing the slope and stabilizing/ repairing the waterward face of the residence. No impacts to waste material or waste facilities are proposed. c. Water runoff (including stormwater): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. The project proposes to utilize the existing stormwater plan and does not propose to alter the stormwater plan. Temporary erosion and sediment control (TESC) measures will be implemented and applied with best management practices to stop waste material from entering ground or surface waters. 2) Could waste materials enter ground or surface waters? If so, generally describe. No waste materials are expected to enter ground or surface waters due to this project. Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 7 of 15 __ __ __ __ __ __ __ __ __ __ 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. No proposed changes or alterations to the drainage patterns in the vicinity of the site. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: TESC measures will be implemented during construction to avoid discharges to downslope waters. Also, the project is for repair and stabilization measures, and proposes such through the use of soldier pile wall placement, anchored Tecco Mat placement, and slope revegetation the project aims to reduce the effects of erosional forces on the slope. Although, there are no anticipated alterations to runoff and drainage from existing conditions. 4. Plants a. Check the types of vegetation found on the site: _ _deciduous tree: alder, maple, aspen, other _ _evergreen tree: fir, cedar, pine, other _ _shrubs _ _grass _ _pasture _ _crop or grain _ _ Orchards, vineyards or other permanent crops. _ _ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other _ _water plants: water lily, eelgrass, milfoil, other _ _other types of vegetation Vegetation on the southern portion of the site surrounding the single-family residence is dominated by maintained lawn, ornamental plantings and non-native invasive species including Himalayan blackberry (Rubus armeniacus), English ivy (Hedera helix) and butterfly bush (Buddleia davidii). Vegetation on the steep slope along the northern portion of the subject property is dominated by red alder (Alnus rubra), big leaf maple (Acer macrophyllum), osoberry (Oemleria cerasiformis), salmonberry (Rubus spectabilis), and non-native invasive English ivy. Lesser amounts of beaked hazelnut (Corylus cornuta), oceanspray (Holodiscus discolor) and western swordfern (Polystichum munitum) were also observed. b. What kind and amount of vegetation will be removed or altered? No proposed vegetation removal or alterations except for replanting the shoreline buffer and slope area with native vegetation. c. List threatened and endangered species known to be on or near the site. None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The lower portion of the affected slope area from the delineated OHW to approximately +20 feet NAVD88 consists of a gradual slope. This portion of the slope is fully within the 50-foot shoreline buffer and will be safely replanted with native trees and shrubs and reseeded to minimize erosion and restore shoreline ecological functions. Additionally, the entire landslide area extending landward of the shoreline buffer will be replanted with native shrubs, and herbaceous species to the extent feasible and a strip of land immediately landward of OHW Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 8 of 15 along the subject property shoreline will be treated for invasive species and replanted with native tree, shrubs and herbaceous species. See the conceptual mitigation plan for planting details. e. List all noxious weeds and invasive species known to be on or near the site. Subject property contains non-native invasive species including Himalayan blackberry (R ), English ivy ( and butterfly bush (). 5. Animals a. any birds and animals which have been observed on or near the site or are known to be on or near the site. Examples include: None observed during site investigations. b. List any threatened and endangered species known to be on or near the site. The National Marine Fisheries Service (NMFS) identifies critical habitat for Puget Sound (PS) chinook salmon (), bull trout (), and rockfish (.) along the subject property shoreline, while the USFWS Information for Planning and Consultation (IPaC) tool identifies the potential presence of marbled murrelet (), yellow-billed cuckoo () and bull trout within the vicinity of the subject property. c. Is the site part of a migration route? If so, explain. Potential nearshore chinook salmon migration habitat is found within the project area. d. Proposed measures to preserve or enhance wildlife, if any: The project will protect fish and wildlife through careful project timing, the use of best management practices, and conducting project activities per regulatory approvals. Revegetation of the lower portion of the slope with native vegetation is intended to enhance the ecological function of the shoreline. e. List any invasive animal species known to be on or near the site. None known. 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. No additional energy will be needed for the proposed project. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No, the height and location of proposed replacement structures will not affect the potential for solar energy use of adjacent properties. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: No energy conservation features are included within the plans for this proposal. 7. Environmental Health Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 9 of 15 a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. 1) Describe any known or possible contamination at the site from present or past uses. There is no known contamination at the site. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. There are no existing hazardous chemicals or infrastructure that might affect project development. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. No toxic or hazardous chemicals will be needed for the proposed project’s operation. 4) Describe special emergency services that might be required. No new emergency services will be required beyond typical paramedic, fire, and other health and safety services already a part of the use of the subject property. 5) Proposed measures to reduce or control environmental health hazards, if any: No specific measures to reduce/ control environmental health hazards have been proposed. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? Boat traffic and noise generated from residential use exists in the project area, but neither are anticipated to affect the project. 2) What types and levels of noise would be created by or associated with the project on a short- term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. On a short-term basis, construction noise associated with the proposed project (residential repairs, and shoreline stabilization) may be present during normal working hours (7am - 4pm). Work along the bulkhead will take place during low tide and as such may take place outside of the normal working hours for the duration of repair work. On a long-term basis, no expected difference in the types and/or levels of noise associated with the proposed project. 3) Proposed measures to reduce or control noise impacts, if any: Conducting work per approved work windows and regulatory approvals will reduce potential noise impacts. 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe. The property is used as a single-family residence (SFR). Adjacent properties to the East and West are developed with a single-family residences. This project does not propose to change the Department of Community Development 33325 8th Avenue South Federal Way, WA 98003-6325 253-835-2607; Fax 253-835-2609 www.cityoffederalway.com Page 10 of 15 current land use of the site and/or adjacent properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or nonforest use? No, the site has not been used for working farmlands or forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No impacts to or from surrounding working farm or forest lands are anticipated. c. Describe any structures on the site. The property is developed with one single-family residence, a rock bulkhead, a driveway and associated residential infrastructure. d. Will any structures be demolished? If so, what? No proposed demolition e. What is the current zoning classification of the site? Residential (RS15.0) f. What is the current comprehensive plan designation of the site? Residential: Single Family (Urban Residential) g. If applicable, what is the current shoreline master program designation of the site? Urban Conservancy h. Has any part of the site been classified as a critical area by the city or county? If so, specify. City of Federal Way has delineated the entire site as within an Erosion Hazard Area and Landslide Hazard Area. No other part of the site is given a critical area classification by the city or county. i. Approximately how many people would reside or work in the completed project? No structures for residences are proposed in this project. Occupancy is expected to remain unchanged. j. Approximately how many people would the completed project displace? People will not be displaced by the completed project. k. Proposed measures to avoid or reduce displacement impacts, if any: People will not be displaced by the completed project. l. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: No change in use is proposed. m. Proposed measures to reduce or control impacts to agricultural and forest lands of long-term commercial significance, if any: