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I <br /> Preliminary Stormwater Site Plan Everett, WA <br /> I Peak flows based upon the above input are as follows: <br /> p p <br /> Peak Flows (cfs) <br /> 2-year 10-year 100-year <br /> I <br /> Pre-Dev 0.1235 + 0.5076 = 0.6311 0.5683 + 2.2315 = 2.7998 0.9360 + 3.6595 = 4.5955 <br /> Offsite Run On 0.2470 1.1366 1.8721 <br /> Developed 8.2900 16.3419 21.3133 <br /> I <br /> Allowable Release Rates (0.631 1* .5)+0.2470 = 0.5585 2.7998+1.1366=3.9364 4.5955+1.8721 =6.4676 <br /> The following are StormSHED's analytical output sheets for the stormwater detention <br /> Ifacility design: <br /> Start of live storage: 100.0000 ft <br /> IEvent Match Q (cfs) Peak Q (cfs) Peak Stg (ft) Vol (cf) Vol (acft) Time to Empty <br /> 2 year 0.5585 0.5572 106.6898 1 1691 1 .83 2.6839 163.50 <br /> I10 year 3.9364 3.8388 107.2560 128586.88 2.9519 164.33 <br /> 100 year 6.4676 6.0250 108.1421 146858.12 3.3714 164.50 <br /> 1 'A <br /> Event Precip (in) <br /> I 6 mo 0.9920 <br /> 2 year 1 .5500 <br /> 10 year 2.6000 <br /> 100 year 3.2500 <br /> HYDLIST SUMMARY <br /> HydID Peak Q (cfs) Peak T (hrs) Peak Vol (ac-ft) Cont Area (ac) <br /> I2 year out 0.5572 24.33 3.4105 37.5000 <br /> 10 year out 3.8388 11.83 6.5597 37.5000 <br /> I100 year out 6.0250 10.33 8.5470 37.5000 <br /> I Record Id: FULL POND <br /> Descrip: Prototype Record Increment 0.10 ft <br /> I Start El. 100.0000 ft Max El. 109.0000 ft <br /> Stage Volume <br /> Stage (ft) Volume (cf) <br /> I100.00 0.0000 <br /> 104.00 61447.0000 <br /> 109.00 164547.5000 <br /> PACLAND Job# 50175001 Page 12 <br />