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Trapezoidal Channel in C-Gulch <br />Riprap Sizing -Trapezoidal Channel <br />D50 =Size of Riprap <br />D50 = ((V X S^.17)/7.58))^2 <br />D50 = Diameter in feet <br />V =Velocity <br />S =Slope <br />D50 = 2.3 feet 28 inches <br />Drainage channels C6, Cg, C10 & C14 will be constructed at least 6-feet witle at the bottom with 2H:1V <br />side slopes, 2-feet deep including freeboard with D50 riprap of 24-inches. <br />f 1 <br />L.J <br />PR-07 EXH-8 -16 2/03 <br />