Laserfiche WebLink
Y } <br /> Cooley Smiles Dental Clinic 17318.20 October 18,2017 <br /> Drainage Report Section I, Page 1 <br /> Section I — Project Overview <br /> Section I Summary <br /> Overview <br /> Existing Condition <br /> Developed Condition <br /> Overview <br /> The proposed project is a new 4,787 sf dental clinic building with parking and landscaping. It will be <br /> located on 2 existing parcels at 10627 and 10709 19th Ave SE in Everett,WA,which will be combined into <br /> one parcel. Frontage improvements are required for 106th PI SE to the north, and restoration of curb, <br /> gutter, and sidewalk are required for abandoned driveways along 19'Ave SE to the west. <br /> North parcel: 10627 19th Ave SE, Everett, WA 98208 (TPN: 00445600003100) <br /> South parcel: 10709 19th Ave SE, Everett,WA 98208 (TPN: 28052000203900) <br /> Existing Condition <br /> The project is located on 2 parcels which are both currently developed.The north parcel contains a one- <br /> story single-family residence.The south parcel contains a small retail building with a parking lot, and is <br /> covered with mostly grass on the eastern half.The project site is relatively flat,with about a 1%slope <br /> from the northeast to southwest. Underlying soils consist of glacial till per the geotechnical report. <br /> Developed Condition <br /> Land disturbance will affect the extents of both parcels and a portion of the ROW.A new dental clinic <br /> building will be constructed along with parking areas and landscaping. New plus replaced impervious <br /> surfaces total more than 5,000 sf.Therefore,the project must address Minimum Requirements#1-9 of <br /> the 2014 Stormwater Management Manual for Western Washington by Department of Ecology (2014 <br /> SWMMWW).The Minimum Requirements are addressed in Section II—Minimum Requirements. <br /> The proposed areas are as follows: <br /> Proposed Land Coverage <br /> Landscape: 6,309 sf(0.145 ac) <br /> Roof: 4,787 sf(0.110 ac) <br /> Sidewalk: 936 sf(0.021 ac) <br /> North Parking, Flat: 2,049 sf(0.047 ac) <br /> South Parking, Flat: 7,139 sf(0.164 ac) <br /> Total: 21,220 sf(0.487 ac) <br /> 250 4th Avenue South,Suite 200 <br /> Edmonds,WA 98020 <br /> ENGINEERING ph.425378.8500 I f.425.778.5536 <br /> www.cgengineering.com <br />