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response to planning comments 3.pdfKAM Engineering Mike Clugston AICP, Associate Planner City of Edmonds Development Services Department 1215"h Avenue North Edmonds, WA 98020 RE: SFR at 23920104th Ave W Plan Check #PLN2014-1294 Revise Site Plan Summary RAM Job No. 15-007 Mr. Mike Clugston; February 23, 2016 �� Di IN �''+ "'�-� t�N mn� FEB22 2016 hJUILRINN DEVA111"WENT CN'"T°It 0 F EDMOOS This letter outlines the revisions made to the building permit application for the single family residence at 23920 104th Ave W. Revisions to the building permit and site plan have been made per the review comments for the concurrent 4 -lot short plat (#PLN20150001). The main issue and revision made to the site plan was to rotate the house and driveway to the north so it would access a private access driveway, not 104th Ave W directly. To accommodate the revised house and driveway layout the following revisions have been made: 1. The house and driveway have been rotated north. Building height calculations have been adjusted for the new layout, average original grade increased from 359.37 to 539.41. 2. Direct driveway access to 104th Ave W has been removed. A new private access driveway along the north boundary of the site is proposed (to accommodate future lots to the west). Per discussions with City Engineering Staff it was determined that a private access driveway along the north boundary which extends to the west boundary of the site could be constructed with the initial single family resident (Lot 1), 3. Due to the fact the proposed infiltration trench is located under the private access driveway it will need to be built with the Lot 1 construction. The infiltration trench has been designed to accommodate all four lots of the short plat (4 SFRs at 4,500 sf each + 7,150 sf private access driveway). 4. The total impervious surface added by the new driveway and initial single family resident (Lot 1) now exceed 5,000 sf; therefor the site development is now considered a Category 2 Small Site development. The infiltration trench is sized using WWHM, not the City's simplified sizing charts. If there are any questions regarding the items above or the contents of the revised plans please contact me at your earliest convenience; I can be reached at (425)678-6960 or RobL@RAMengineeringinc.com. We sincerely appreciate your time and assistance. Thank you, Rob Long, PE Principal cc: Kayla Clark, c/o Select Homes, Inc. RAM Engineering 1653113`hAve W,Suite A108 Lynnwood WA 98037 (425)678-6960 RAMenginerringinc.com