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SWB -6D 100YR Runoff.txt <br />Runoff Curve Number and Runoff Mon Nov 26 19:14:46 2012 <br />Project: SWB -6D <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 0.587 <br />Herbaceous mixture (Fair) 72 B 1.975 <br />CN (weighted): 75.4 <br />Total Area: 2.562 Acre <br />2. Runoff <br />Return Period: 100 -Year <br />Rainfall, P: 3.20 <br />Runoff, Q: 1.1191 <br />Runoff volume: 0.2389 <br />Page 1 <br />By: B Langenfeld Date: 11/26/12 <br />Checked: Date: <br />in <br />in <br />Acre -Ft <br />