Laserfiche WebLink
Decclo Engineering Inc. <br />17217' 7Th Ave. W. <br />Bothell, WA. 98012 <br />(206) 390-8374 <br />Far. 425-741+8214 <br />July 19, 2010. <br />Ms. Jane Zimmerman <br />Project Manager <br />City of Everett. <br />3200 Cedar Street <br />Everett, WA 98201 <br />Re: Drainage Design for Silver Lake Dev. SD #07-003,10304 27' .Drive SE, Everett, WA <br />Dear Jane„ <br />1 want to thank you.for taking the timerto discuss this project and biased on our conversations, i have <br />prepared a drainage design to address the runoff from the proposed improvements as follows: (Refer <br />to attached site plan and details) The geotechnical report prepared by GEC Group NW Inc, shows <br />the soils to be "course sand. to sand" therefore the trench design is based on "sand" for sizing the <br />trenches. <br />Front Lot# 1 w/Existing Home Existing home is tied into the detention system of old plat. No <br />revised detention proposed for this existing lot. <br />Access Drive to Lot 2: A 2.0 ft wide by 2.0 ft deep gravel filled trench, 14 feet Iong is proposed to <br />run along the north side of the driveway with a. CB located near.the <br />entranceto address the runoff from the driveway. (See detail) <br />Sizing:,At 120 ft long x 14 ft wide the driveway has an area of 1,680-sf <br />requiring a trench length of 12.8 if (per Table 3-2.2. w/sand) However, we <br />are providing 14-1f of trench. <br />Lot 42 Roof Area: Sizing: At 1,600 sf of roof area, (using Table 3-2.2, w/Sand) a 14 ft long by <br />2-ft wide by 2-ft deep Roof Downspout System is proposed to handle the roof <br />runoff. (See Roof Trench w/Level Spreader Detail) <br />i have :attached.a drainage plan with notes, figures and. details for your'review-Please review and <br />contact me at 206-390-8374 if you have. any questions. <br />Sincerely, <br />Richard Deccio P.E. <br />Deccio Engineering <br />Rp A.: <br />`i`� OF wASy` <br />a <br />AL�G <br />7fl��f� <br />