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r � <br /> Cooley Smiles Dental Clinic 17318.20 October 18,2017 <br /> Drainage Report Section III, Page 1 <br /> Section III — Off-Site Analysis <br /> Section III Summary <br /> Task 1—Define and map the study area <br /> Task 2—Review all available information of the study area <br /> Task 3—Field inspect the area <br /> Task 4-Describe the drainage system, and its existing and predicted problems <br /> An off-site analysis has been prepared according to Chapter 3 of Volume I of the Drainage Manual. It <br /> shall assess the potential off-site water quality, erosion, slope stability, and drainage impacts associated <br /> with the project and propose appropriate mitigation of those impacts.An initial qualitative analysis shall <br /> extend downstream for the entire flow path from the project site to the receiving water or up to one <br /> mile,whichever is less. If a receiving water is within one-quarter mile,the analysis shall extend within <br /> the receiving water to one-quarter mile from the project site.The analysis must extend upstream to a <br /> point where any backwater effects created by the project cease. <br /> Task 1 —Define and map the study area <br /> The study area is defined as the entire flow path from the project site to the receiving water or up to <br /> one mile,whichever is less. Per the survey, runoff flows in a southwesterly direction and enters 19th Ave <br /> SE to the west.The receiving water is Silver Lake, approximately 0.39 mi to the south. <br /> 250 4th Avenue South,Suite 200 <br /> ® Edmonds,WA 98020 <br /> ENGINEERING ph.425.778.8500 I f.425.778.5536 <br /> www.cgengineering.com <br />