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6/17/96 page 5 <br />Bowie No. 2 Mine <br />• Coal Waste Bank <br />1.8-inch 10-Year, 24-Hour Storm Event <br />REACH SUMMARY <br />DITCH REACH ID No. DO1 <br />Ditch Length:~400..Q0 ft Ditch Width: 0.00 ft <br />Side Slopel 2.00 Ditch Slope: 0.0200 ft/ft <br />Side Slopel 2.00 Contrib Has: A3b <br />Mannings n :0.0250 Dn Invert 0.00 ft <br />Dn W.S. Elev:0.0000 Num Steps 10 <br />Trib Area: 1.80 Ac. Design Flow 1.64 cfs <br />Depth 0.51 ft Vel 3.15 fps <br />Upstream W.S. Elev: 0.00 ft. <br />DITCH REACH ID No. D02 <br />Ditch Length: 330.00 ft Ditch Width: 0.00 ft <br />Side Slopel 2.00 Ditch Slope: 0.0200 ft/ft <br />Side Slopel 2.00 Contrib Bas: A3a <br />Mannings n :0.0250 Dn Invert 0.00 ft <br />Dn W.S. Elev:0.0000 Num Steps 10 <br />Trib Area: 1.80 Ac. Design Flow 1.64 cfs <br />• Depth 0.51 ft~ Vel 3.15 fps <br />Upstream W.S. Elev: 0.00 ft. <br />DITCH REACH ID No. D03 <br />Ditch Length: 483.00 ft Ditch Width: 0.00 ft <br />Side Slopel 2.00 Ditch Slope: 0.2200 ft/ft <br />Side Slopel 2.00 Contrib Bas: Ala <br />Mannings n :0.0250 Dn Invert 0.00 ft <br />Dn W.S. Elev:0.0000 Num Steps 10 <br />Trib Area: 2.84 Ac., Design Flow 2.87 cfs <br />Depth 0.40 ft Vel 8.90 fps <br />Upstream W.S. Elev: 0.00 ft. <br />DITCH REACH ID No. D04 <br />Ditch Length: 323.00 ft Ditch Width: 0.00 ft <br />Side Slopel 2.00 Ditch Slope: 0.2800 ft/ft <br />Side Slopel 2.00 Contrib Bas: Alb <br />Mannings n :0.0250 Dn Invert 0.00 ft <br />Dn W.S. Elev:0.0000 Num Steps 10 <br />Trib Area: 2.99 Ac. Design Flow 3.04 cfs <br />Depth 0.39 ft Vel 9.88 fps <br />Upstream W.S. Elev: 0.00 ft. <br />ApEQUACY-O1 <br />