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Table 2 . <br />RUNOFF VOLUME AND PEAK FLOW <br />FROM SPOIL FILL AND ASSOCIATED DRAINAGE AREAS <br />Cover <br />Spoil fill <br />Ditches, Pond <br />and reclaimed <br />areas <br />Combined <br />Drainage Area Description <br />Area Curve Slope <br />acres <br />1.98 80 <br />1.4 90 <br />3.38 84 .03 <br />Length TC <br />hrs <br />670 0.2 <br />Runoff Volume and Peak Flow Calculations <br />• Design Rainfall (10 yr, 24 hr) 1.8 inches <br />(25 yr., 24 hr) <br />Storm Runoff (10 yr, 24 hr) 0.61 inches = 0.17 acre ft <br />(25 yr, 24 hr) <br />Peak Discharge 800 <br />CSM/inch <br />Peak Discharge (10 yr, 24 hr) '2.58 cfs <br />(25 yr, 24 hr) 3.77 cfs <br />-4- <br />