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Runoff Curve Number and Runoff <br />Project: SwB -6 <br />11/27/12 <br />Location: Revenue Mine <br />Developed <br />1. Runoff Curve Number (CN) <br />Cover description CN Soil Group Area(Acre) <br />Mined Land, Disturbed (Poor) 87 C 5.817 <br />Herbaceous mixture (Fair) 72 B 1.975 <br />CN (weighted): <br />Total Area: <br />2. Runoff <br />Return Period: <br />Rainfall, P: <br />Runoff, Q: <br />Runoff volume: <br />83.2 <br />7.792 Acre <br />SWB -6 25YR Runoff.txt <br />25 -Year <br />2.80 <br />1.3002 <br />0.8443 <br />Page 1 <br />Tue Nov 27 09:48:11 2012 <br />By: B Langenfeld Date: <br />Checked: Date: <br />in <br />in <br />Acre -Ft <br />