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I SERENITY MEADOWS <br /> January 20,2012 <br /> ISUPPORTING DRAINAGE DATA- SERENITY MEADOWS <br /> TOTAL SITE 90169.20 SF 2.07 acres <br /> EXISTING BASINS <br /> BASIN 1-ALDERWOOD 10,366.00 sf 0.24 acres <br /> BASIN 2 -ALDERWOOD 34,027.00 sf 0.78 acres <br /> 111 BASIN 2 -VASHON TILL 8,904.00 sf 0.20 acres <br /> TOTAL DRAINAGE BASIN 2 53,297.00 sf 1.22 acres <br /> IDEVELOPED BASINS <br /> BASIN 1 6,812.00 sf 0.16 acres <br /> 111 BASIN 2A north 25,293.00 sf 0.58 acres <br /> M BASIN 2B south 21,192.00 sf 0.48 acres <br /> TOTAL DRAINAGE BASIN 53,297.00 sf 1.22 acres <br /> 1 <br /> IMPERVIOUS CALCULATIONS <br /> IBASIN 1 <br /> ROADS 2,360.00 sf 0.05 acres <br /> SIDEWALKS 454.00 sf 0.01 acres <br /> 1 DRIVEWAY 1 476 SF 0.01 ACRES <br /> BASIN I-TOTAL IMP 2,814.00 sf 0.06 acres <br /> iBASIN 2A <br /> I ROADS 2,411.00 sf 0.06 acres <br /> SIDEWALKS 0.00 sf 0.00 acres <br /> UNIT 2 1485.00 sf 0.03 acres <br /> I CAR WASH 288.00 sf 0.01 acres <br /> UNIT 3 1425.00 sf 0.03 acres <br /> UNIT 4 1425.00 sf 0.03 acres <br /> IUNIT 5 1425.00 sf 0.03 acres <br /> TOTAL 6,048.00 sf 0.14 acres <br /> I DRIVEWAY 2 407.00 sf 0.01 acres <br /> DRIVEWAY 3 301.00 sf 0.01 acres <br /> CAR WASH 400.00 sf 0.01 acres <br /> IDRIVEWAY 4 400.00 sf 0.01 acres <br /> DRIVEWAY 5 400.00 sf 0.01 acres <br /> a TOTAL 1,908.00 sf 0.04 acres <br /> BASIN 2A-TOTAL IMP 10,367.00 sf 0.24 acres <br /> BASIN 2B <br /> IROADS 2,441.00 sf 0.06 acres <br /> SIDEWALKS 1,044.00 sf 0.02 acres <br /> I <br /> 1 <br /> I <br />