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Table TR 90-06-4 <br />• SEDIMENTATION POND "M3-S" - DESIGN CALCULATIONS <br /> Drainage Area (feet2) 8,216,420 <br /> (acres) 188.62 <br /> Maximum Elevation (feet) 6,970 <br /> Minimum Elevation (feet) 6,600 <br /> Drainage Height (feet) 370 <br /> Hydraulic Length (feet) 5,000 <br /> Equivalent Area (acres) 198.63 <br /> Watershed Shape factor 0.95 <br /> Length of Contour (feet) <br /> LC-25 2,580 <br /> LC-50 5,880 <br />• LC-75 6,280 . <br /> Average Slope (%) 16.6 <br /> Slope Adjustment Factor 1.01 <br /> Precipitation (inches) <br /> 10 year-24 hour 1.8 <br /> 25 year-24 hour 2.1 <br /> 100 year-24 hour 2,7 <br /> Weighted Average Runoff (inches) <br /> Sub Area Acres CN C(USLE) 10/24 25/24 100/24 <br /> Disturbed 141.79 82 0.45 0.52 0.71 1.15 <br /> Undisturbed/P.eclaimed 46.83 70 0.10 0.17 0.28 0.56 <br /> Total 188.62 <br /> Weighted Average 80 0.36 0.43 0.60 1.00 <br /> <br />MR 90-06 Exhibit 3 - 20 11/16/90 <br />