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<br />• <br /> <br />TABLE 20-1A <br />POSTMINING MATER{AL MASS BALANCE - 11-W SOUTH <br />Preminin Pit Materiel Volume Calculations (bank cubic ards - BCYI <br />Vir in Overburden Material Volume 11,633,241 be <br />In-Place Coal Volulme 2,436,404 be <br />Non-Recovered Coal and Partin Material 155,930 be <br />Total Volume Removed 14,069,645 be <br />Total S oil Material Available 11,769,171 be <br />Postminin Material Volume Calculations (loose cubic ards - LCY <br />Postminin Pit Volume 14,069,645 cubic ards <br />S oil Material Iswelledl 13,557,547 Ic <br />Volume Difference 512,098 Ic <br />% Difference -3.8 <br />Revised 9/98 <br />