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SWB -3 100YR Runoff 14NOV12.txt <br />Runoff Curve Number and Runoff wed Nov 14 15:02:56 2012 <br />Project: SWB -2 <br />Location: Revenue mine <br />Developed <br />1. Runoff Curve Number (CN) <br />Cover description CN Soil Group Area(Acre) <br />Oak -Aspen & Mt brush (Poor) 74 C 12.671 <br />Open Space -Poor ( <50% grass) 89 D 6.139 <br />CN (weighted): <br />Total Area: <br />78.9 <br />18.810 Acre <br />2. Runoff <br />Return Period: 100 -Year <br />Rainfall, P: 3.20 in <br />Runoff, Q: 1.3300 in <br />Runoff volume: 2.0848 Acre -Ft <br />Page 1 <br />By: B Langenfeld Date: 11/14/12 <br />Checked: Date: <br />