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Table 8- Sediment and Clear Water Ditch Data <br />Mountain Coal Company, L.L.C, West Elk Mine <br />Somerset, Colorado <br />• <br />Sediment Ditch Data <br />Typical Ditch <br />Side <br />Slopes <br />Bottom <br />Width <br />(feet) <br />Depth <br />(feet) <br />Riprap Min. <br />D50 Size <br />(inches) <br />E1 <br />1.5HAV <br />3 <br />2 <br />1.5 <br />E2 <br />1.5H:1V <br />3 <br />2 <br />1 3 <br />E3 <br />1.5H:1V <br />3 <br />2 <br />6 <br />E4 <br />1.51-1:1V <br />3 <br />2 <br />6 <br />E5 <br />1.5H:1V <br />3 <br />2 <br />9 <br />E6 <br />1.5HAV <br />3 <br />2 <br />9 <br />E7 <br />1.5H:1V <br />3 <br />2 <br />9 <br />E8 <br />1.5H:1V <br />3 <br />2 <br />9 <br />E9 <br />1.5H:1V <br />3 <br />2 <br />9 <br />E10 <br />1.5HAV <br />3 <br />2 <br />9 <br />E11 <br />1.5H:1V <br />3 <br />2 <br />12 <br />E12 <br />1.5H:1V <br />3 <br />2 <br />12 <br />W1 <br />1.5HAV <br />3 <br />2 <br />3 <br />W2 <br />1.51-1:1V <br />3 <br />2 <br />6 <br />W3 <br />1.5H:1V <br />3 <br />2 <br />6 <br />W4 <br />1.5HAV <br />3 <br />2 <br />9 <br />W5 <br />1.5H:1V <br />3 <br />2 <br />9 <br />W6 <br />1.5H:1V <br />3 <br />2 <br />6 <br />W7 <br />1.511:1V <br />3 <br />2 <br />9 <br />W8 <br />1.5H:1V <br />3 <br />2 <br />9 <br />W9 <br />1.5H:1V <br />3 <br />2 <br />9 <br />W10 <br />1.5HAV <br />3 <br />2 <br />9 <br />W11 <br />1.5H:1V <br />3 <br />2 <br />12 <br />W12 <br />1.5H:1V <br />3 <br />2 <br />12 <br />Ditch to Pond <br />1.5HAV <br />5 <br />2 <br />12 <br />Clear Water <br />Ditch Data <br />Typical Ditch <br />Side <br />Slopes <br />Bottom <br />Width <br />feet <br />Depth <br />(feet) <br />Riprap Min. <br />D50 Size <br />inches <br />,Typical Clear Water Ditch <br />1.5HAV <br />3 <br />1 <br />3 <br />I Typical Road Ditch <br />I 1.5HAV <br />1.5 <br />0.5 <br />3 <br />• <br />LO <br />P:\Mpls \06 CO\26 \06261003 MCC Refuse Pile Site Review & Permit \WorkFiles \Permit Application \Tables \Table 8 and Clear Water Ditch Data.xlsx <br />