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Ditch Design <br /> <br />1. Ditch: 15-D3 <br />2. Description: Diversion Ditch <br />3. Ditch c~Yade: 3 percent <br />4. Area Drained: 39 acres <br />5. Peak Discharge: 50 (1.12)(1.15) = 64.4 cfs <br />6. Ditch Design: <br />Ditch Lining Rxk <br />n = .045 <br />Use ditch w/"V" walls 1:2 slope <br />A = 2 <br />P = 4.472D <br />H[i = A/P = .4472D <br />Q = (1.49/n) (A) (RH) 2/3 (gl/2) <br />• <br />D = 2.67 4 <br />38.39 (S)- <br />D = 2.67 64.4 <br />38.39 ~-~ <br />D = 2.34 feet <br />Use 2.84 feet deep with freeboard. <br />• <br />