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SWB -1 100 YR Runoff CN and Runoff.txt <br />Runoff Curve Number and Runoff Thu ]an 10 14:30:22 2013 <br />Project: SWB -1 <br />By: B Langenfeld Date: <br />01/10/13 <br />Location: Revenue Mine <br />Checked: Date: <br />Present <br />1. Runoff Curve Number (CN) <br />Cover description <br />CN <br />Soil Group Area(Acre) <br />Bare rock <br />89 <br />3.907 <br />oak -Aspen & Mt brush (Poor) <br />66 <br />B 2.203 <br />oak -Aspen & Mt brush (Poor) <br />74 <br />C 12.986 <br />old mine waste <br />74 <br />3.552 <br />CN (weighted): 75.8 <br />Total Area: 22.648 Acre <br />2. Runoff <br />Return Period: <br />100 -Year <br />Rainfall, P: <br />3.20 <br />in <br />Runoff, Q: <br />1.1408 <br />in <br />Runoff volume: <br />2.1531 <br />Acre <br />-Ft <br />Page 1 <br />