2115 55TH ST SE 2018-12-31 - Laserfiche WebLink

APPROVED PUBLIC WORKS DEPARTMENT Anstey Engineering t3Y 8627 NE 180th Street DATE 4 If--17 Bothell,WA 98011 CITY OF EVERETT REVIEWED FOR PERMIT Phone:206-303-7639 Fax:425-659-9203 E-mail:benanstey@ansteyengineering.com March 1,2017 Proposed Lot 1 New Residence for Richard Vaisvila Richard Vaisvila richardvaisvila@comcast.net Located near: 55th Street and Lowel Road Tax Parcel 00495800701003 Everett,WA Legal Description:LOT 1,CITY OF EVERETT SHORT PLAT NO. 1202-2007-045,RECORDING NUMBER 201503035001,RECORDS OF SNOHOMISH COUNTY,LOCATED IN CITY OF EVERETT,COUNTY OF SNOHOMISH. Targeted Drainage Review Section 1 Project Description/Overview The 11,098sf(0.255+/-acre) site is located on the north side of Lowel Road between the gravel alley and the Pacific Northwest Traction Company Right of Way(Substation). The site is currently vacant with some ivy,trees and brush. There is no storm drainage in the area. The site slopes down to the northeast at 20 to 40%+/-. Storm water runoff currently sheet flows off of the vacant site to the PNW Traction Company ROW, or infiltrates on site. See attached site map. The flow will continue to flow to the northeast as it now does but infiltration trenches will be installed to better infiltrate the flow from the driveway and houses. The driveway pavement will slope to a catch basin in the driveway and the catch basin will drain to a 21'x2'x2' infiltration trench. The house downspouts will drain to a 561f x 2' x 2' infiltration trench. The site is located on Parcel 00495800701003. The site address is to be determined This project will pave 2,226sf of existing brush and ivy with pavement or roofs The project proposes to construct a new 1,838sf Single Family Residence and a 699sf driveway. See site plan. Section 2 Site Assessment Per the City of Everett Storm Drainage Manual Figure 2.1, Requirements 1 through 5 will be met. Requirement#1—A storm water site plan will be provided-see attached. Requirement#2—A Site Pollution Prevention Plan is provided-see attached Requirement#3— Source control of pollutants will be provided by a downturned elbow in the driveway catch basin and the infiltration trench for the driveway runoff. Requirement#4— Preserve the Natural Drainage will be complied with as the runoff will continue to flow as it does now to the south. Requirement#5—Infiltrate,Retain or Disperse stormwater runoff to the extent feasible.A perforated pipe connection to the City Storm Drainage system is the best method for control of storm water for this site. The soils on the site are Alderwood series (5)per the SCS Soil Map but a soil investigation by Anstey Engineering found the soils to be medium sand, so the use of total infiltration for the disposal of storm runoff is practical. Soils Logged March 1, 2017 weather was cloudy Vek, AE2017-27