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EXHIBIT 17 <br />TABLE 1 <br />DITCH SIZING <br />Waste pile boundary 4.96 acres <br />Drainage boundary 8.63 acres <br />South ditch drainage area 4.59 acres <br />North ditch drainage area 4.04 acres <br />South Ditch <br />4.59 acres Disturbed drainage area <br />69 CN <br />0.33 Watershed slope (ft/ft) <br />1.09 Slope adjacent factor <br />9.7 Discharge (CFS/inch) <br />3.02 Runoff (inches) <br />0.062 Ditch slope (ft/ftl <br />0.035 Mannings "N" <br />31.9 100-year, 24-hour peak (CFS) <br />Use a V-ditch with 7.5' top width, 1.5' depth and 2.5H:1V sides <br />46.9 <br />North Ditch <br />4.04 acres <br />89 <br />0.33 <br />3.02 <br />9.7 <br />1.90 <br />0.080 <br />0.035 <br />Qmax (CFS) <br />Disturbed drainage area <br />CN <br />watershed slope (ft/ft) <br />Slope adjacent factor <br />Discharge (CFS/inch) <br />Runoff (inches) <br />Ditch slope (ft/ft) <br />Mannings "N" <br />31.9 100-year, 24-hour peak (CFS) <br />Use a V-ditch with 7,5' top width, 1.5' depth and 2.Si3:1V sides <br />53.2 <br />JK/klk <br />Qmax (C£S) <br />Revised 2-21-89 for a 100-year, 24-hour event (4.2" rainfall) <br />