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• • V-Ditch Design Ditch Grade Minimum Grade Maximum Grade RipRap Peak Min Max De th Veloci Depth Velocit Dso Inch Flo C12 7.0% 12.0% 0.84 6.5 0.76 8.0 9 6.84 C13 7.0% 11.0% 0.39 3.9 0.36 4.6 0.86 " C14 5.0% 50% Tra ezoidal Channel C-Gulch 37.17 C15 7.0% 11.0% 0.38 3.8 0.35 4.6 0.75 C16 2.0% 5.0% 1.98 6.2 1.66 - 8.7 9 35.15 C17 7.0% 11.0% 0.46 4.4 0.42 5.1 1.33 "' C18 33% 33% 0.68 -12.3 0.68 -'72:3 9 8.25 C19 25% 25% 0.21 4.9 0.21 4.9 0.29 C-20 7.0% 11.0% 0.40 4.0 0.37 4.7 0.93 C-21 7.0% 11.0% 0.34 3.6 0.31 4.2 0.59 C-22 7.0% 11.0% 0.91 6.9 0.84 Sit 9 8.37 C-23 7.0% 11.0% 0.94 7.0 0.87 - - 8.4 9 9.13 C-24 40.0% 40.0% 0.61 `"":12.6 0.61 15.5 21 6.84 " Ri ra lined tra ezoidal channel in C-Gulch -See a es 8-17 - 8-19 "` Line with unnite, concrete or other material to revent infiltration. Ditch D1 Trapezoidal Channel -See page 8-11 D2 2% 40% 1.48 5.1 0.84 15:6 12 16.41 D3 5% 40% Tra ezoidal Channel 12 2.67 D4 2% 10% 0.44 2.7 0.35 . 4.3 3 0.78 D5 2% 2% 0.6 3.4 0.7 2.9 1.81 D6 2% 2% 0.46 2.8 0.49 2.4 0.87 Ditch E1 2% 2% 0.64 2.9 0.64 2.9 1.79 G1 Renamed Ditch D-4 G2 Deleted from Desi n Ditch SAE1 Deleted from Desi n SAE2 Deleted from Desi n Ditch FG1 30% 30% 0.21 5.4 0.21 5.4 0.33 Ditch GV61 28% 28% 0.16 4.3 0.16 4.3 0.16 GVB2 17% 17% 0.15 3.2 0.15 3.2 0.11 GVB3 10% 10% 0.17 2.7 0.17 2.7 0.11 GV64 47% 47% 0.20 '6:5 0.20 6,5 6 0.35 GV65 35% 35% 0.18 5.2 0.18 5.2 0.25 GVB6 15% 15% 0.20 3.7 0.20 3.7 0.20 Berm alon coal stock ile pad - flow in ditches B 30, 3 1, 32 Hei ht Veloci Hei ht Veloci 1% 2% 1.00 2.8 0.87 3.6 4.00 Berms Freeman Gulch 2% 4% 0.34 1.9 0.30 2.5 0.33 Provide ri ra unnite or concrete lined V-Ditch as necessa for erosion protection. Ditches cut in rock will not re uire erosion rotection. Flow de pth in feet does not include 0.3 feet freeboard. TR-43 APPRove~ `(~~l~o ~ Exh 8-29i 08/06