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CRA2022-0117_DeterminationCITY OF EDMONDS 121 5ch Avenue North, Edmonds WA 98020 Phone: 425.771.0220 • Fax: 425.771.0221 • Web: www.edmondswa.gov DEVELOPMENT SERVICES DEPARTMENT • PLANNING DIVISION `nc. 1891J Critical Area Determination (CRA2O22-0117) 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 18303 84TH PL W Tax Account Number 00596000000800 Property Owner MATTHEW E & MORGAN S MAJERUS Applicant DA ZHANG Critical Area(s) Present ❑ Wetlands (ECDC 23.50): NA ❑ Frequently Flooded Areas (ECDC 23.70): NA 2 Geologically Hazardous Areas (ECDC 23.80) 2 Erosion Hazard Areas: Yes 2 Landslide Hazard Areas: Yes ❑ Seismic Hazard Areas: NA ❑ Fish & Wildlife Habitat Conservation Areas (ECDC 23.90) ❑ Mapped Fish & Wildlife Habitat: NA ❑ Streams: NA Site Description The subject property is located along the east side of 84th PI. W and is currently developed with a single- family residence. According to the Soil Survey of Snohomish County, soils on the subject site are "Alderwood Gravelly Sandy Loam, 15-25% slopes" on the eastern two-thirds of the property and Alderwood Urban land complex, 2-8% on the street face. The subject property slopes away from the south, most severely down to the northwest corner. According to City LiDAR data, the site contains slopes greater than 15% which are considered a potential erosion hazard. Additionally, the LiDAR data shows slopes greater than 40% with a 10-foot change in elevation on the neighboring 84th Ave. W right- of-way, which are considered a potential landslide hazard. Buffers may extend on the subject site and thus any land disturbing activity within 50 feet of the steep slope on the neighboring property will require a geotechnical report per requirements of ECDC 23.80, with specific reference to ECDC 23.80.060 and ECDC 23.80.070. 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 may be reviewed as part of a building permit. 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. 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. TRISTAN SEWELL Planner 8/25/22 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) Page 1 2 Fish and Wildlife Habitat Conservation Areas (ECDC 23.90) Building permits —Earth Subsidence and Landslide Hazard Areas (ECDC 19.10) City of Edmonds GIS map tool with approximate location of critical areas: http://maps.edmondswa.gov Page 13 City of Edmonds Y CRA2022-0117 • a Legend Creeks 00 Seismic Hazard Areas v� Earth Subsidence and Landslide �0"' L! Minimum Buffer Adjacent to Hat Wetlands Wetlands Boundary Wetland Boundaries Not Completel W Wetland Known Extents Af�—_Z5-25 S Alderwood Gravell Floodplains sandy loam, Q. ® A %slopes ® AE Alderwood Urban, ® vE lar�:complex, -�-__ X 2-811/0 Slopes C.0 DOH Wellhead Protection Areas . 8 Month ■ 1 Year ❑ 5 Year Ll 10 Year Buffer Zone W 00 13 ReZones i PRD RoW M N USGS Soils M © Alderwood Gravelly sandy loam, 15 W . Alderwood Gravelly sandy loam, 2-' A Alderwood Gravelly sandv loam. 8- 1:379 -362 O Notes 18303 84TH PL W 0 31.57 63.1 Feet 564 47.0 This map is a user generated static output from an Internet mapping site and is for 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