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Ditch Design <br /> <br />1. Ditch: 15-D4 <br />2. Description: Diversion ditch <br />3. Ditch (Made: 7 percent <br />4. Area Drained: 45 acres <br />5. Peak Discharge: (56)(1.12)(1.12) = 70.25 <br />6. Ditch Design: <br />Ditch Lining Rxk <br />n = .045 <br />Use dii<ch w/"V" walls 1:2 slope <br />A = 2 <br />P = 4.472D <br />RH = A/P = .4472D <br />4 = (1.49/n) (A) (RH) 2/3 (gl/2) <br />D = 2.67 Q <br />38.39 (S)• <br />70.25 <br />D = 2.671 <br />38.39 .07)• <br />D = 1.99 feet <br />Use 2.5 feet deep with freeUoaxd. <br />• <br />