2307 COLUMBIA AVE 2021-05-04 - Laserfiche WebLink

Timi Anigilajae December 21, 2018 Executive Summary This site has an address of 2307 Columbia Ave Everett, Wa 98203 and has a parcel number of 00545001602300. The property is 0.13 Acres in size (5,663 sf) in the Southwest County UGA, zoned; R2. This project proposes the construction of an Adult-Family-Home with a driveway,handicapped access driveway, and a walkway in the front entry of the house. This application is under the jurisdiction of the City of Everett and the 2014 Department of Ecology Stormwater Management Manual for Western Washington. Per the DOE SWMMWW this project triggers the evaluation of Minimum Requirements#1-5. This project does not trigger Minimum Requirement#7 for Flow Control and therefor, as stated in Section 1-2.5.5 Minimum Requirement#5: On-site Stormwater Management, "projects qualifying as flow control exempt in accordance with 1-2.5.7 minimum requirement#7: flow control do not have to achieve the LID performance standard,nor consider bioretention, rain gardens,peiineable pavement, and full dispersion if using List#1 or#2." Per List 1: On-site Stormwater Management BMP's for Projects Triggering Minimum Requirements#1-5, all BMP's have been evaluated for feasibility in the hierarchal order of the list. Reasons for infeasibility are highlighted later in this report. The only feasible BMP to manage stormwater for the proposed development is BMP T5.10C: Perforated Stub-out Connection. A conveyance system on-site including a trench drain at the low point of the proposed driveway,pvc pipe, and yard basins will direct stormwater runoff to a combined stormwater/sewer main located on Columbia Ave. The 13 Elements of Stormwater Pollution Prevention Plan(SWPPP) are addressed on the drawing sheet titled Storm Water Prevention Plan and as well as in this report. Post construction soil in the disturbed areas,not covered by impervious surface, are to be installed in accordance to BMP T5.13. Post-construction Soil Quality and Depth.