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• Pond 008 as-built calculations <br />Runoff Curve Number and Runoff 12/07/2001 14:04 <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 ..............: 10 yr <br />Rainfall, P (24-hour) ..: 2 in <br />Runoff, O ..............:0.36 in <br />Runoff Volume ..........:3.27 Acre-Ft <br />Graphical Peak Discharge 12/0712001 14:10 <br />Project: 008 POND By: R L GUBKA, PE Date: 12/07/01 <br />• Location: NEW HORIZON MINE Checked: Date: <br />Present <br />1. Data: <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 />throughout watershed ............... = 0.00 percent of A <br />0.0000 Acres <br />2. Frequency ........................yr = 10 <br />3. Rainfall,P(24-hour) ..............in = 2.00 <br />4. Initial abstraction, la............ = 0.7027 <br />• Attachment 2.05.3(3)4- 1 <br />