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1. 'PROJECT OVERVIEW <br />This document is intended to provide engineering information necessary to support the <br />building permit application to the City of Everett for the SFR and driveway proposed on <br />this...lot..T.hesite..islocated .at..3XXXXrorner.Ave, Everett,. WA.98201;.refer to Figure 1 for a <br />vicinity map. This project will take access from the existing roadway to the easr (Kromer <br />Ave). The parcel area is approximately 0.15 acres. The existing site, in the area of <br />disturbance consists of lawn. The slope of the site in the area of disturbance is steep and <br />averages approximately 20 percent down to the northwest. The new SFR will be located <br />approximately 5 feet from the northern property line and 10 feet from the eastern property <br />line. <br />This project proposes to construct more than 2,000 sf and less than 5,000 sf of new and <br />replaced impervious surfaces. Therefore, Minimum Requirements 1-5 apply to all of the . <br />new and replaced impervious surfaces. for this project along with all the converted <br />vegetated areas. The proposed impervious surfaces will be dispersed or tightlined to an <br />existing storm system via a perforated stubout connection. The driveway will be dispersed <br />as sheet flow. Included on the following page is a copy of the MR flow chart from the <br />Department of Ecology Stormwater Management Manual for Western Washington (DOE <br />SWMMWW <br />Figures 2 & 3 are provided to show the existing and developed basins and runoff <br />conditions for this site. The runoff in the existing conditions sheet flows gradually over <br />vegetated surfaces to the northwest toward the northwestern property lines. <br />Due to .the size of this project, Minimum Requirements 1-5 apply to the proposed drainage <br />design as noted. above. The stormwater design has been laid out to meet the 2019 DOE <br />SWMMWW. <br />Kikuchi SFR 21-0104 <br />September 2021 Page 3 <br />