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. Runoff Curve Number and Runoff 12/07/2001 14:05 <br />r~ <br />LJ <br />• <br />Project: 008 POND By: R L GUBKA, PE Date: 12/07/01 <br />Location: NEW HORIZON MINE Checked: Date: <br />Present <br />MINE DISTURBANCE 85 C 25.193 Acres <br />MINE DISTURBANCE - 0.500 25.193 Acres <br />RECLAIMED IRRIGATED PASTURE 71 C 85.243 Acres <br />RECLAIMED IRRIGATED PASTURE 0.500 85.243 Acres <br />CN (weighted): 74 <br />CF (weighted): 0.500 <br />2. Runoff <br />Frequency ..............: 25 yr <br />Rainfall, P (24-hour) ..: 2.4 in <br />Runoff, O ..............:0.56 in <br />Runoff Volume ..........:5.16 Acre-Ft <br />Graphical Peak Discharge <br />Project: 008 POND <br />Location: NEW HORIZON MINE <br />Present <br />1. Data: <br />Checked: Date: <br />Drainage area :....................A = 110.4360 Acres <br />Runoff Curve Number :.............CN = 74 <br />Time of Concentration:...........Tc = 1.06 <br />Pond and swamp areas spread <br />(Revised 12/01) <br />Attachment 2.05.3(3) -10-11 <br />12/07/2001 14:08 <br />By: R L GUBKA, PE Date: 12/07/01 <br />