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Basin Contributory to fourth 18" 0 Pipe <br />Area - 10.3 AC. 18" 0 pipe has adequate capacity. <br />Basin Contributory to 24" m Pipe <br />Area - 47.8 AC. <br />Tc - 60 Min. <br />t - 0.8 In./H r. <br />Q - (0.4)(0.8)(47.8) - 15.3 cfs <br />Capacity of 24" 8 Pipe <br />Q = .On061 s} 08/3 - 12.2 cfs <br />Basln Contributory to 36" 0 Pipe <br />Area = 571 AC. (Basin 'F' b 'X') <br />Tc - From Nomograph <br />H = 7120-5410 = 1710 <br />L - 7700' = 1.46 Mi. <br />Tc = 14 Min. <br />i = 0.6 In. <br />Q = (0.4)(0.6)(571) 137 cfs <br />Basin Contributory to 18" 0 Pipe <br />Area 6.2 AC. <br />Tc - 15 Min. <br />i = 0.6 <br />Q = CiA 1.5 cfs <br />Adequate Tf at slope greater than 1$. <br />Far undersized needs a 6' x 4' box. <br />Therefore pipe is adequate. <br />l Z- <br /> <br />