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