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Runoff Curve Number and Runoff <br />Project: 011 Pond By: R L GUBKA Date: <br />Location: NEW HORIZON MINE Checked: Date: <br />Developed <br />1. Runoff curve number (Cn) <br />Cover description CN Soil Type Area <br />pit pumpage 74 C 9.000 Acres <br />pasture 74 c 126.850 Acres <br />CN (weighted): 74 <br />2. Runoff <br />Frequency ..............: 10 yr <br />Rainfall, P (24 -hour) ..: 2.00 in <br />Runoff, Q ..............: 0.3498 in <br />Runoff Volume ..........: 3.9604 Acre -Ft <br />C- Factor Calculation <br />Project: 011 Pond By: R L GUBKA Date: <br />Location: NEW HORIZON MINE Checked: Date: <br />Developed <br />C- factor (CF) <br />Cover description <br />PIT PUMPAGE <br />IRRIGATED <br />CF (weighted): 0.500 <br />CF Area(Acre) <br />0.500 9.000 <br />0.500 126.850 <br />Attachment 2.05.3(3) -20 -8 <br />