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Design <br />Basin <br />Basin Area <br />Imperviousness <br />Slope <br />Runoff Coeficients <br />Lc <br />Ti <br />Tt <br />Tc <br />Rainfall Intensity I (in /hr) <br />Basin Flows Q (cfs) <br />Point <br />Area <br />Soil Type A/B Soil Type C/D <br />I % <br />% <br />5 Yr <br />100 Yr <br />ft <br />min <br />min <br />min <br />5 Yr <br />100 Yr <br />5 Yr <br />100 Yr <br />I- <br />M -1 <br />29.15 <br />10.82 18.33 <br />2.00 <br />0.011 <br />0.135 <br />0.454 <br />690 <br />37.8 <br />6.039 <br />44 <br />1.85 <br />3.45 <br />7.26 <br />45.70 <br />M -2 <br />8.44 <br />2.00 6.44 <br />2.00 <br />0.009 <br />0.144 <br />0.473 <br />1670 <br />39.9 <br />41.11 <br />81 <br />1.22 <br />2.29 <br />1.49 <br />9.13 <br />M -3 <br />67.22 <br />40.04 27.18 <br />15.00 <br />0.010 <br />0.198 <br />0.469 <br />2350 <br />36.4 <br />61.67 <br />98 <br />1.07 <br />2.00 <br />14.27 <br />62.90 <br />Mining Runoff Calculations <br />Soil Runoff Coeficient Table <br />5 Yr 100 Yr <br />2 <br />Type A/B 0.088 0.362 <br />Type C/D 0.162 0.508 <br />15 <br />Type A/B 0.17 0.42 <br />Type C/D 0.24 0.54 <br />P:\23511\1 33 - 235 1 1- 1 0002 \Deliverables \Drainage Report \Runoff Calculations.xls <br />Iverson Mine <br />Site Imperviousness Table <br />Lawn <br />Mining Conitions <br />2 <br />15 <br />1 -hour Point Rainfall Depth <br />5 Yr 100 Yr <br />P1 1.49 2.78 <br />