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CRA2023-0089 DeterminationCITY OF EDMONDS 121 5ch Avenue North, Edmonds WA 98020 Phone: 425.771.0220 • Fax: 425.771.0221 • Web: www.edmondswa PLANNING & DEVELOPMENT DEPARTMENT • PLANNING DIVISION '17C. 1 g9\3 6/8/2023 ELIZABETH G & MACILVA MACLLVAINE 9222 183RD PL SW EDMONDS, WA 98020-2392 Subject: Critical Areas Determination (CRA2023-0089) Site Address: 9222 183RD PL SW Dear Applicant/Owner, Please find the enclosed critical area determination for the Critical Areas Checklist you submitted to the City of Edmonds Planning Division. The critical area determination for your property is "STUDY REQUIRED." Note that this determination is a site -specific determination and not a project -specific determination. If the critical area determination is "CRITICAL AREA PRESENT," additional critical areas information or critical areas specific studies may be required for development or alteration of your property depending on the location of the activity. "WAIVER" means no further critical area review is required for development or alteration of your property. If you have any questions regarding this critical area determination, please contact the planner on duty at 425.771.0220. Regards, ROSE HAAS Planning Division Planning & Development Department Enc: Critical Area Determination CITY OF EDMONDS 121 5t" Avenue North, Edmonds WA 98020 Phone: 425.771.0220 • Fax: 425.771.0221 • Web: www.edmondswa.gov PLANNING & DEVELOPMENT DEPARTMENT • PLANNING DIVISION 'nc. 1891i Critical Area Determination (CRA2023-0089) Based on a review and inspection of the subject site, staff has determined that one or more critical areas are located on or near the site. Critical areas are ecologically sensitive or hazardous areas that are protected in order to maintain their functions and values. Site Location 9222 183RD PL SW Tax Account Number 00588200000300 Property Owner ELIZABETH G & MACILVA MACLLVAINE Applicant JENNIFER KIM Critical Area(s) Present ❑ Wetlands (ECDC 23.50): Yes ❑ Frequently Flooded Areas (ECDC 23.70): Yes ❑ Geologically Hazardous Areas (ECDC 23.80) ❑ Erosion Hazard Areas: Yes ❑ Landslide Hazard Areas: Yes ❑ Seismic Hazard Areas: NA ❑ Fish & Wildlife Habitat Conservation Areas (ECDC 23.90) ❑ Mapped Fish & Wildlife Habitat: NA ❑ Streams: Yes Site DescriDtion The subject property is an approximate 11,761 square foot lot which contains multiple critical areas, including severe erosion hazards and a potential stream. The parcel is also adjacent to a landslide hazard area and a Hutt Park Wetland. The soils are classified as Alderwood Gravelly sandy loam, 15-25% slopes according to Snohomish County soils data. LiDAR data indicates that mid portion of the lot contains approximate 17% slopes. Slopes greater than 15% with the mapped soil composition are considered Severe Erosion Hazard Areas. LiDAR data also indicates there are slopes greater than 40% adjacent to parcel on the south property line are. Slopes greater than 40% are considered Landslide Hazard Areas. According to the City's GIS information, Hutt Park Wetland is approximately 225 feet to the south of the subject parcel. GIS data also indicates a potential stream flowing from the wetland northward onto the southwest corner of the property and flowing along the western border of the property line. During inspection of the subject site, it was confirmed that the dedicated driveway portion of the lot is relatively flat and gradually slopes upward towards the subject single-family home. An approximate 3- foot rockery is located on the NE corner of the site. Behind the home, an upward slope was detected west to east. An approximate 4 foot retaining wall was observed on the western side of the backyard area. Observed steep slopes on the southeast increased in grade moving southward away from the subject property. The site visit also indicated a potential creek. Gravel drainage followed the City's GIS stream data, but flowing water was not observed until midway along the property's western boundary, where trickling water from a culvert flowed into a drainage ditch. Soils around gravel drainage system were moist and the ground was soft, indicating the presence of water. Any land disturbing activity within 50 feet of the steep slopes will require a geotechnical report per requirements of ECDC 23.80, with specific reference to ECDC 23.80.060 and ECDC 23.80.070. Additionally, an Erosion and Sediment control plan compliant with chapter 18.30 ECDC may be required for development on a site containing an erosion hazard area which would be reviewed as part of a building permit. Buffers from the wetland and potential associated creek could impact the subject site. A qualified professional may need to assess the area to determine the classifications of any creek and/or wetland on and adjacent to the site. What does this mean? The critical area regulations are only triggered when an alteration is proposed to a critical area or its buffer. However, once an alteration in or near critical area is proposed, critical area studies and City review and approval may be required. Page 12 What is an `Alteration'? According to Section 23.40.005 of the Edmonds Community Development Code (ECDC): "Alteration" means any human -induced action which changes the existing conditions of a critical area or its buffer. Alterations include, but are not limited to: grading, filling; dredging; draining; channelizing; cutting, pruning, limbing or topping, clearing, relocating or removing vegetation; applying herbicides or pesticides or any hazardous or toxic substance; discharging pollutants; paving, construction, application of gravel; modifying for surface water management purposes; or any other human activity that changes the existing landforms, vegetation, hydrology, wildlife or wildlife habitat value of critical areas. Unpermitted alteration of a critical area or buffer (including tree trimming or topping, dumping yard waste, or application of pesticides or fertilizers) can lead to enforcement action and fines. Before undertaking any work, please contact the City to verify whether critical area studies and City review is necessary. ROSE HAAS, Planner Name, Title ��Iq6z_t� Signature Cited sections of the Edmonds Community Development Code (ECDC) can be found at http://www.codepublishing.com/WA/Edmonds Environmentally Critical Areas General Provisions (ECDC 23.40) Wetlands (ECDC 23.50) Frequently Flooded Areas (ECDC 23.70) Geologically Hazardous Areas (ECDC 23.80) Fish and Wildlife Habitat Conservation Areas (ECDC 23.90) Building permits — Earth Subsidence and Landslide Hazard Areas (ECDC 19.10) 6/8/2023 Date City of Edmonds GIS map tool with approximate location of critical areas: http://maps.edmondswa.gov Page 13 \` City of Y Edmonds CRA2023-0089 Ma p -44 • J� , _ Legend Creeks r ® Seismic Hazard Areas e, Earth Subsidence and Landslide I L! Minimum Buffer Adjacent to Hat 0 Wetlands 91 3 5 912 5 Wetlands Boundary Wetland Boundaries Not Completel Wetland Known Extents rr Floodplains "I L A 3= ® AE ® VE ® X ' Storm Catch Basins t � 134 o Edmonds Private 1 404 ■ Infiltration Storm Manholes _ 0 Edmonds !` Y p Private Infiltration • ' 1: 411 Detention Facilities \� Culvert • <all other values> :40: • Yes a• - �....: r..., �,........, Z. - I X� I Notes 183rd PL SW 0 63.15 126.3 Feet 1,128 94.0 This map is a user generated static output from an Internet mapping site and is for 9222 New front deck and back patio reference only. Data layers that appear on this map may or may not be accurate, WGS_1984_Web_Mercator_Auxiliary_Sphere current, or otherwise reliable. © City of Edmonds THIS MAP IS NOT TO BE USED FOR DESIGN OR CONSTRUCTION