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FORWARD LANDFILL <br /> CHANNEL DIMENSION <br /> Trib. Area Q=(2.31)*A Min. depth w/o Design Depth <br /> Downdrain AC cfs ** freeboard ft * ft <br /> 1 5.26 12.15 0.38 1.00 <br /> 2 11.90 27.49 0.60 1.50 <br /> 3 12.47 28.81 0.61 1 0 <br /> 4 15.83 36.57 0.70 1.50 <br /> 5 13.81 31.90 0.65 1.50 <br /> 6 12.67 29.27 0.62 1.50 <br /> * b=1 ft, z=1 <br /> **Ci calculated from hydrology map <br /> Bench Crossing <br /> Q100=36.57 cfs <br /> b=1 ft <br /> z=6:1 <br /> d=1 ft to 1.5ft <br /> J:\Allied\Forward\CALCS\North Slope Downdrain\Downdrain size.xls 5/20/2005 <br />