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Runoff Cure <br />From Figure 5-46 Conditions: Flntecedent Moisture condition <br />II, Hydrological soil classification B. Curve CN66 <br />Runoff for S#orn event': <br />1.8 inches X .10= .18 inches <br />18 inches=l2 inlft }{ (125acres)(43560ft/acre)= 81675 cu ft <br />Peak Di scharge <br />18 inches K 120 cfs'inch of runoff= 21.6 cfs <br />correction factor for steeper slope 1.39 <br />21.6 cfs X 1.39= 38.82 cfs <br />The stormwater facilites should be sized such as to <br />accomodate the peak flow of 30.02 cfs (bottom of pit area) and to <br />contain 81675 cubic feet of water. <br />H. Fergu n <br />Proceedures for determining Peak Flows in Cobrado, Soil Conservation Service, USDA, Mar 1980, p24 <br />' p46, Curve 66 <br />" p 15 peak rates of discharge for small watersheds (24 hour type IIA Stonn) <br />