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10/24/96 page 6 <br />SANBORN CREEK MINE <br />COAL WASTE BANK DESIGN <br />2.0-INCH 10 YEAR, 24 HOUR STORM EVENT <br />-------------------------------- <br />REACH SUMMARY <br />• <br />DITCH REACH ID No. D06 <br />Ditch Length: 220.00 ft Ditch Width: 0.00 ft <br />Side Slopel 1.00 Ditch Slope: 0.3200 ft/ft <br />Side Slope2 1.00 Contrib Has: <br />Mannings n :0.0250 Dn Invert 0.00 ft <br />Dn W.S. Elev:0.0000 Num Steps 10 <br />Trib Area: 4.18 Ac. Design Flow 1.96 cfs <br />Depth 0.45 ft Vel 9.85 fps <br />Upstream W.S. Elev: 0.00 ft. <br />DITCH REACH ID No. D07 <br />Ditch Length: 180.00 ft Ditch Width: 0.00 ft <br />Side Slopel 1.00 Ditch Slope: 0.3200 ft/ft <br />Side Slope2 1.00 Contrib Bas: A4 <br />Mannings n :0.0250 Dn Invert 0.00 ft <br />Dn W.S. Elev:0.0000 Num Steps 10 <br />Trib Area: 5.17 Ac. Design Flow 1.98 cfs <br />Depth 0.45 ft Vel 9.87 fps <br />Upstream W.S. Elev: 0.00 ft. <br />DITCH REACH ID No. D10 <br />Ditch Length: 100.00 ft Ditch Width: 0.00 ft <br />Side Slopel 1.00 Ditch Slope: 0.0001 ft/ft <br />Side Slope2 1.00 Contrib Bas: <br />Mannings n :0.0100 Dn Invert 0.00 ft <br />Dn W.S. Elev:0.0000 Num Steps 10 <br />Trib 'Area: 0.65 Ac. Design Flow 0.01 cfs <br />Depth 0.23 ft Vel 0.28 fps <br />Upstream W.S. Elev: 0.00 ft. <br /> <br />