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Preliminary Stormwater Site Plan Everett, WA <br /> 1 646.96V3-ter- <br /> Offsite Powder-mill-Guich Creek Drainage Area: - rpa says ,towie_!' 9 I/ <br /> IOFFSITE Event Summary oleol <br /> Event 'Peak Q (cfs) Peak T (hrs)IHyd Vol (acft) Area (ac)(Method 1Raintype �� a 1 <br /> 6 mo j 0.0723 i 22.00 0.0794 10.0000 SBUH TYPE1A <br /> 2 year 0.2470 I 9.17 0.2840 110.0000 [ SBUH i TYPE1A <br /> ' 10 year I 1.1366 8.50 0.8452 j 10.0000 SBUH i TYPE1A <br /> 100 year 1.8721 j 8.17 1.2569 10.0000 SBUH ,TYPE1A <br /> I Record Id: OFFSITE <br /> Design Method SBUH !Rainfall type r <br /> 1 TYPE1A <br /> Hyd Inty --_"- � --�-�-----� _ 10.00 min -Peaking Factor _..________� 484.00 <br /> j [Abstraction Coeff 0.20 <br /> IPervious Area (AMC 2) 10.00 ac IiDCIA 0.00 ac <br /> 'Pervious CN 81.00 DC CN 0.00 <br /> Pervious TC j 44.18 min [DC TC 0.00 min <br /> j Pervious CN Calc <br /> I r- - ! <br /> j Description j SubArea I Sub cn <br /> 1. <br /> j Wood/forest land (young 2nd growth/brush) 10.00 ac I 81.00 1 <br /> j _ Pervious Composited CN (AMC 2) I 81.00 <br /> Pervious TC Calc <br /> - _Description____ _ <br /> Type 1.____�� - [length [-Slope 1 Coeff I Misc TT <br /> IWoods or forest with light r30000 155 l41.27 <br /> Sheet underbrush.: 0.40 ft ,8.70 o/o 0.4000?in ;min <br /> Brush round with some trees 300.00 i <br /> Shallow j y g 110.30% 10.0600 2.91 min <br /> (n=0.060) ift <br /> Pervious TC T i 44.18 <br /> min <br /> i <br /> I <br /> I <br /> I <br /> IPACLAN D Job# 50175001 Page 10 <br />