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TR -102 EXH. 8-29i 06/15 <br />V-Ditch Design <br />Ditch Grade Minimum Grade Maximum Grade RipRap <br />Peak <br />Min <br />Max Depth Velocity <br />Depth <br />Velocity D50 Inch <br />Flow <br />C12 <br />7.0% <br />12.0% 0.84 6.5 <br />0.76 <br />8.0 <br />9 <br />6.84 <br />C13 <br />7.0% <br />11.0% 0.39 3.9 <br />0.36 <br />4.6 <br />0.86 <br />** C14 <br />5.0% <br />50% Trapezoidal Channel C-Gulc <br />38.32 <br />C15 <br />7.0% <br />11.0% 0.38 3.8 <br />0.35 <br />4.6 <br />0.75 <br />C16 <br />2.0% <br />5.0% 1.98 6.2 <br />1.66 <br />8.7 <br />9 <br />36.30 <br />C17 <br />7.0% <br />11.0% 0.46 4.4 <br />0.42 <br />5.1 <br />1.33 <br />*** C18 <br />33% <br />33% 0.68 12.3 <br />0.68 <br />12.3 <br />9 <br />8.50 <br />C19 <br />25% <br />25% 0.21 4.9 <br />0.21 <br />4.9 <br />0.29 <br />C-20 <br />7.0% <br />11.0% 0.40 4.0 <br />0.37 <br />4.7 <br />0.93 <br />C-21 <br />7.0% <br />11.0% 0.34 3.6 <br />0.311 <br />4.2 <br />0.59 <br />C-22 <br />7.0% <br />11.0% 0.91 6.9 <br />0.84 <br />8.2 <br />9 <br />8.87 <br />C-23 <br />7.0% <br />11.0% 0.94 7.0 <br />0.87 <br />8.4 <br />9 <br />9.88 <br />C-24 <br />40.0% <br />40.0% 0.61 12.6 <br />0.61 <br />15.5 <br />21 <br />6.84 <br />C-25 <br />10.0%20.0% <br />0.181 2.8 <br />0.16 <br />3.5 <br />0.16 <br />C-26 <br />1 7% <br />7%1 0.681 5.71 <br />0.68 <br />5.7 <br />10.31 <br />** Riprap lined trapezoidal channel in C-Gulch - See pages 8-17 - 8-1 <br />*** Line with gunnite, concrete or other material to prevent infiltration. <br />Ditch D1 <br />Trapezoidal Channel - See page 8-11 <br />D2 <br />2% <br />10% 1.48 5.1 <br />0.84 <br />7.8 <br />12 <br />9.7 <br />D3 <br />20% <br />50% 0.10 8.5 <br />0.30 <br />4.2 <br />6 <br />0.60 <br />D4 <br />2% <br />10% 0.44 2.3 <br />0.33 <br />4.2 <br />0.78 <br />D5 <br />2% <br />2% 0.38 2.6 <br />0.38 <br />2.58 <br />0.74 <br />D6 <br />2% <br />2% 0.36 2.4 <br />0.36 <br />2.39 <br />0.47 <br />Ditch E1 <br />2% <br />2%1 0.64 2.9 <br />0.64 <br />2.9 <br />1.79 <br />G1 <br />Renamed Ditch D-4 <br />G2 <br />Deleted from Design <br />Ditch SAE1 <br />Deleted from Design <br />SAE2 <br />Deleted from Design <br />Ditch FG1 <br />30% <br />30% 0.21 5.4 <br />0.21 <br />5.4 <br />0.33 <br />Ditch GVB1 <br />28% <br />28% 0.16 4.3 <br />0.16 <br />4.3 <br />0.16 <br />GVB2 <br />17% <br />17% 0.15 3.2 <br />0.15 <br />3.2 <br />0.11 <br />GVB3 <br />10% <br />10% 0.17 2.7 <br />0.17 <br />2.7 <br />0.11 <br />GVB4 <br />47% <br />47% 0.20 6.5 <br />0.20 <br />6.5 <br />6 <br />0.35 <br />GVB5 <br />1 35% <br />35% 0.181 5.2 <br />0.18 <br />5.2 <br />0.25 <br />GVB6 <br />1 15% <br />15% 0.201 3.7 <br />0.20 <br />3.7 <br />0.20 <br />GVB7 <br />1 10% <br />2% 0.301 3.9 <br />0.43 <br />2.2 <br />0.60 <br />Berm along coal stockpile pad - flow in ditches B 30, 31, 32 <br />Height Velocity <br />Height Velocity <br />1% <br />2% 1.00 2.8 <br />0.87 <br />3.6 <br />4.00 <br />Berms Freeman Gulch <br />2% <br />4% 0.34 1.9 <br />0.301 <br />2.5 <br />0.33 <br />Provide riprap, gunnite or concrete lined V-Ditch as <br />necessary for erosion protection. <br />Ditches cut in rock will not require erosion protection. <br />Flow depth in feet does not include 0.3 feet freeboard <br />TR -102 EXH. 8-29i 06/15 <br />