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9610 19th Avenue SE <br /> July 27, 2012400* <br /> Revised September 18, 2012 <br /> Page 4 <br /> II. SITE ASSESSMENT <br /> Topography: Existing topography was collected in order to prepare the engineering plans <br /> for the project. The topographic survey serves as the base map upon which all engineering <br /> design plans area based. For reference, the topographic survey is included as the last sheet <br /> in the engineering plan set. <br /> Drainage: The existing drainage infrastructure for the McDonalds Restaurant drains through <br /> a stormwater detention vault, an open swale, and into a 12-inch ductile iron pipe flowing <br /> westerly to the easterly edge of Interstate 5 and into a wetland. The drainage elements and <br /> the existing wetland buffer is shown on the engineering plans as well as on the topographic <br /> survey. <br /> Soils: The soils on the site consist of four to six feet of fill consisting of loose silty sand and <br /> silty sand with gravel over native medium to very dense silty sand and silty sand with gravel. <br /> These soils are categorized as hydrologic soil group "C". Excerpts from the Geotechnical <br /> Engineering Study are included in Section "VII - Special Reports and Studies." <br /> Ground Cover: The existing McDonalds Restaurant site is very intensely developed with <br /> impervious surfaces and a few landscape islands and strips around the perimeter. West of <br /> the westerly limit of the McDonalds Restaurant there is brush, blackberries, and grass. <br /> Further west (down the hill) there are some small trees. There is one significant tree <br /> proposed to be removed at the northeast corner of proposed building "B". <br /> Critical Areas: There is an existing wetland located on the west side of the site (not <br /> impacted by this project) and also a slope that contains a gradient in excess of 40% on the <br /> order of 14-feet high. <br /> Adjacent Areas: On the north and south of the project site there is intensive existing land <br /> development anci associated stormwater control. To the east of the project site drainage is <br /> controlled by 19t Avenue Southeast. <br /> City of Everett Stormwater Management Manual Figures 2.1 and 2.2 are included in the <br /> following pages. These pages demonstrate that Minimum Requirements #1-9 apply to this <br /> project. <br /> Ph: (206)403-0933, email:jayd@deckerce.com <br />