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drainage cut vol <br />COLOWYO COAL COMPANY <br />2003 - TR - 56 <br />EARTHWORK COSTS <br />WEST PIT DRAINAGE CUT VOLUMES <br />REVISED OCTOBER 2003 <br />Isopach Surtace Average Bank Loose <br />Elevation Area Difference Thickness Yards Yards <br /> (Sq. Ft) (Ft) (Bcy) (Lcy) <br />0 0 <br /> 0 <br />10 0 <br /> 0 <br />20 0 <br /> 0 <br />30 0 <br /> 0 <br />40 0 <br /> 0 <br />0 0 0 <br />0 0 0 <br />0 0 0 <br />0 0 0 <br />0 0 0 <br />Total Cut Volume 0 0 <br />A-4 <br />