3623 HOYT AVE 1-3 2020-06-17 - Laserfiche WebLink

August 2012 Department of Ecology Drainage Manual 2.5.1 Minimum Requirement#1: Preparation of Stormwater Site Plans 3.1.1 Site Analysis: Volume 1, Section 3.1 Boundary Survey & Topography Map • Information about the property boundary, and topography was obtained by a survey provided by 360 Surveying&Mapping, LLC Vegetation and Utility Infrastructure • The development of this project will require the removal of 7 trees along the south boundary line. Locations of utilities that were provided by 360 Surveying&Mapping, LLC are shown on the site plans. Soils Report • According to the US Department of Agriculture Web Soil Survey,the soils are Alderwood-Urban land complex, 2 to 8 percent slopes. Site Analysis and Summary of Existing Conditions • Existing information on topography, drainage patterns, soils and impermeable layers will be shown on the site plan. 3.1.2 Preliminary Development Layout: Vol 1, Section 3.1.2 A Preliminary Development Layout plan has been created and used to prepare the drawings and maps required for the Stormwater Site Plan 3.1.3 Off-Site Upstream and Downstream Analysis: Vol 1, Section 3.1.3 • Upstream Analysis: There is no anticipated negative impact to the upstream or downstream basins as a result of this project. • Downstream Analysis: There is no anticipated negative impact to the upstream or downstream basins as a result of this project. 3.1.4 Determination of Applicable Minimum Requirements: Vol 1,Section 3.1.4 This project proposes approximately 3079 square feet of impervious surface. Therefore in accordance with DOE I-2.4.2 Redevelopment,the project is required to evaluate Minimum Requirements#1-5. 3.1.5 Preparation of Permanent Stormwater Control Plan: Vol 1, Section 3.1.5 The elements required for Permanent Stormwater Control are provided on the sheet titled Site Plan, Drainage, Sewer, and Water. The design proposes that runoff from the proposed triplex roof, walkway, and driving surface will be routed to the public sewer system.