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SWB -3 100 YR Runoff CN and Runoff.txt <br />Runoff Curve Number and Runoff Thu Jan 10 14:41:29 2013 <br />Project: SWB -3 By: B Langenfeld Date: <br />01/10/13 <br />Location: Revenue Mine Checked: Date: <br />Present <br />1. Runoff Curve Number (cN) <br />Cover description CN Soil Group Area(Acre) <br />Oak-Aspen & Mt brush (Poor) 74 C 7.396 <br />Bare rock 89 C 11.414 <br />CN (weighted): <br />Total Area: <br />83.1 <br />18.810 Acre <br />2. Runoff <br />Return Period: 100 -Year <br />Rainfall, P: 3.20 <br />Runoff, Q: 1.6166 <br />Runoff volume: 2.5339 <br />Page 1 <br />in <br />in <br />Acre -Ft <br />