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CRA2021-0127 Critical Area DeterminationCITY OF EDMONDS 121 5t" Avenue North, Edmonds WA 98020 Phone: 425.771.0220 • Fax: 425.771.0221 • Web: www.edmondswa DEVELOPMENT SERVICES DEPARTMENT • PLANNING DIVISION `ne. 18y1J 7/22/2021 MATTHEW HART 22050 99TH PL W EDMONDS, WA 98020-4540 Subject: Critical Areas Determination (CRA2021-0127) Site Address: 22050 99TH PL W 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 "STUDY REQUIRED," 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, a,ee f,4e AMBER GROLL Planning Division Development Services 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 DEVELOPMENT SERVICES DEPARTMENT • PLANNING DIVISION .11c. 189v Critical Area Determination (CRA2021-0127) 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 22050 99TH PL W Tax Account Number 00602100100700 Property Owner MATTHEW HART Applicant MELINDA HESS Critical Area 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 Descriation The subject property is located on the south side of 99th Place West and is currently developed with a single family home. According to the Soil Survey of Snohomish County, soils on the majority of the subject site consist of "Alderwood Urban Land Complex, 8-15% slopes". The majority of the site is relatively level along the northern most portion of the property and in the vicinity of the existing home, but the site does begin to slope down towards the adjoining properties to the south and west. The majority of the slopes on the subject site are greater than a 30% slope per the City LiDAR data, however the slope off of the western property boundary is greater than a 60% slope. Per ECDC 23.80.020.6.4 any slope 40 percent or greater that exceeds a vertical height of 10 feet, shall be considered a potential landslide hazard. Any land disturbing activity within 50 feet of the steep slope will require a geotechnical report per requirements of ECDC 23.80. 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 areas with slopes greater than 15%. 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. fir, �r AMBER GROLL Name, Title 7/22/2021 Cited sections of the Edmonds Community Development Code (ECDC) can be found at h ttp://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) Date City of Edmonds GIS map tool with approximate location of critical areas: http://maps.edmondswo.gov Page 12 City of Edmonds CRA2021-0127 f? `.� 3 Lynr. ood ` 22042 Moun:l.• Terri-. • III Legend _ O� �^. '`/ Creeks ❑ Seismic Hazard Areas A�' �, � 350 Earth Subsidence and Landslide • i=' L! ' Minimum Buffer Adjacent to Hat • Wetlands ' Op Wetlands Boundary Wetland Boundaries Not Completel Wetland Known Extents •� S� �/� — Floodplains ® A i I .� - • O `� 22053 � AE VE � X �� 1O Contour Lines 10 50: 100 ❑ Landslide Hazard Area 40% i ❑ Severe Erosion Hazard 15%-40% ❑ Erosion Hazard Areas 15%-40% ArcSDE.GIS.STREET_CENTERLINE: y `�' 22007 <all other values, 1 O 2 O 514 9;71;7;8 I Notes r 1:758 O 22050 PI W 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 reference only. Data layers that appear on this map may or may not be accurate, - 99th Edmonds, WA WGS_1984_Web _Mercator _Auxiliary -Sphere © City of Edmonds THIS MAP IS NOT current, or otherwise reliable. TO BE USED FOR DESIGN OR CONSTRUCTION