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SWB -4 100YR Runoff.txt <br />Runoff Curve Number and Runoff Mon Nov 26 15:21:55 2012 <br />Project: SWB -4 B : B Langenfeld Date: 11/26/12 <br />Location: Revenue Mine Checked: Date: <br />Developed <br />1. Runoff Curve Number (CN) <br />cover description CN Soil Group <br />oak -Aspen & Mt brush (Poor) 74 C <br />Open Space -Poor (<50% grass) 89 D <br />CN (weighted): 76.9 <br />Total Area: 30.538 Acre <br />2. Runoff <br />Return Period: 100 -Year <br />Rainfall, P: 3.20 in <br />Runoff, Q: 1.2028 in <br />Runoff volume: 3.0609 Acre -Ft <br />Page 1 <br />Area(Acre) <br />24.733 <br />5.805 <br />