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TABLE 20-1
<br />POSTMINING LANDFORM MASS BALANCE
<br />Postmining Material Volume Calculations
<br />Postmining Spoil Material Calculated:
<br />Postmining Spoil Material Volume (Internal) 9,967,2081cy 31,502,979 cy
<br />Postmining Spoil Material Volume (External) 186,012 cy
<br />Total Postmining Spoil Volume 10,153,220 cy 31,502,979 cy
<br />Postmining Overburden Material Excavated
<br />Premining Total Pit Spoil Volume 11,062,695 cy 30,858,801 cy
<br />Postmining Overburden Material (External) 99,612 cy
<br />Total Overburden Material Excavated (Swelled) 11,162,577 cy 30,858,801 cy
<br />Postmining Material Volume Comparison
<br />Total Postmining Spoil Volume 10,153,220 cy 31,502,979 cy
<br />Total Overburden Material Excavated 11,162,577 cy 30,858,801 cy
<br />Volume Difference 1,009,357 cy 644,178 cy
<br />4 Revised 02/99
<br />Area 1
<br />Area 2
<br />Premining Pit Material Volume Calculations
<br />Premining Material Volume
<br />12,404,306
<br />bcy
<br />31,738,823
<br />bcy
<br />Virgin Overburden Material Volume
<br />9,623,200
<br />bcy
<br />27,087,354
<br />bcy
<br />Total In-place Coal Volume
<br />2,781,106
<br />bcy
<br />4,651,469
<br />bcy
<br />Recoverable Coal Volume
<br />2,526,900
<br />bcy
<br />4,186,322
<br />bcy
<br />Non -recovered Coal and Parting Material Volume
<br />254,206
<br />bcy
<br />456,147
<br />bcy
<br />Premining Overburden Volume
<br />9,877,406
<br />bcy
<br />27,552,501
<br />bcy
<br />Total Pit Spoil Volume
<br />11,062,694
<br />lcy
<br />30,858,801
<br />lcy
<br />Premining Material Mass Volume:
<br />Total Pit Spoil Volume
<br />11,062,694
<br />lcy
<br />30,858,801
<br />lcy
<br />Total Premining Material Volume
<br />12,404,306
<br />bcy
<br />31,738,823
<br />bcy
<br />Postmining Material Volume Calculations
<br />Postmining Spoil Material Calculated:
<br />Postmining Spoil Material Volume (Internal) 9,967,2081cy 31,502,979 cy
<br />Postmining Spoil Material Volume (External) 186,012 cy
<br />Total Postmining Spoil Volume 10,153,220 cy 31,502,979 cy
<br />Postmining Overburden Material Excavated
<br />Premining Total Pit Spoil Volume 11,062,695 cy 30,858,801 cy
<br />Postmining Overburden Material (External) 99,612 cy
<br />Total Overburden Material Excavated (Swelled) 11,162,577 cy 30,858,801 cy
<br />Postmining Material Volume Comparison
<br />Total Postmining Spoil Volume 10,153,220 cy 31,502,979 cy
<br />Total Overburden Material Excavated 11,162,577 cy 30,858,801 cy
<br />Volume Difference 1,009,357 cy 644,178 cy
<br />4 Revised 02/99
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