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C~ <br />COLLECTION DITCH CD-1 <br />Limiting Velocity - 5.0 feet/second <br />Loam to cobbles - non colloidal <br />Slope - 7~ <br />Manning's n - 0.032 <br />R = (n)(Vp) _ (.032)(5.0) _ .91 <br />(1.5)(S).5 (1.5)(.26) <br />A = 7.3 cfs = 1.5 sq. ft. <br />5.0 f sec <br />• <br />Area of triangular channel <br />A = 1.75 d <br />d = _ / H <br />1.75 <br />d = 1_5 = 0.9' <br />1.75 <br />• <br />a•>s' / <br />~. s <br />~~~ •~ ~ Minimum Design <br />3 <br />