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Runoff Curve Number and Runoff <br />Project: POND 012 By: R . L. GUBKA <br />Location: NEW HORIZON MINE <br />Present <br /> CN C AREA <br />UNDISTURBED 80 C 12.152 Acres <br />DISTURBED 85 C 42.933 Acres <br />CN (weighted): 84 <br />CF (weighted): 0.500 <br />2. Runoff <br />Frequency ..............: 10 yr <br />Rainfall, P (24-hour) ..:2.00 in <br />Runoff, Q ..............: 0.74 in <br />Runoff Volume ........ ..:3.39 Acre-Ft <br />Time of Concentration (SCS Method) <br />Curve Number: 84 <br />Length of Flow (ft): 1354.62 <br />Average Land Slope Q: 6.40 <br />Time of Concentration (hrs): 0.23 <br />Pond Report <br />Top of dam elevation: 5610.0000 <br />Bottom of pond elevation: 5603.0000 <br />Top of dam width: 10.0000 <br />Cut slope percent grade: 100.00, slope ratio: 1.00 <br />Fill slope percent grade: 25.00, slope ratio: 4.00 <br />Interior slope percent grade: 40.00, slope ratio: 2.50 <br />Lower left grid corner :1114657.98,601617.47 <br />Upper right grid corner: 1117967.98,603397.47 <br />X grid resolution: 331, Y grid resolution: 178 <br />X grid cell size: 10.00, Y grid cell size: 10.00 <br />Pond Earthwork Volumes <br />Total fill: 4,186.42 C.F., 155.05 C.Y. <br />Total cut :500,392.33 C.F., 18,533.05 C.Y. <br />Pond Storage Volumes <br />Water Elev Storage(AcreFt) (C.Y.) (C.F.) Area(Acre) <br />5603. 00 0.00000 0.0 0.0 0.515 <br />5604. 00 0.54061 872.2 23549.1 0.584 <br />5605. 00 1.14204 1842.5 49747.1 0.638 <br />5606. 00 1.78390 2878.0 77706.9 0.700 <br />5607. 00 2.48382 4007.2 108195.3 0.720 <br />5608. 00 3.22681 5205.9 140559.8 0.781 <br />5609. 00 4.02186 6488.6 175192.2 0.830 <br />5610. 00 4.86649 7851.3 211984.4 0.852 <br />Attachment 2.05.3(3)12-2 <br />