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TABLE 20-1
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<br />POST MIIVING LANDFORM MASS BALANCE
<br /> Area I Area 2
<br />Pre-Mining Pit Material Volume Calculations
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<br />Pre-Mining Material Volume 12,404,306 bcy 31,738,823 bcy
<br />Virgin Overburden Material Volume 9,623,200 bcy 27,087,354 bcy
<br />Total In-place Coal Volume 2,781,106 bcy 4,651,469 bcy
<br />Recoverable Coal Volume 2,526,900 bcy 4,186,322 bcy
<br />Non-recovered Coal and Parting Material Volume 254,206 bcy 456,147 bcy
<br />Pre-Mining Overburden Volume 9,877,406 bcy 27,552,501 bcy
<br />Total Pit Spoil Volume 11,062,694 Icy 30,858,801 Icy
<br />Pre-Mining Material Mass Volume:
<br />Total Pit Spoil Volume 11,062,694 Icy 30,858,801 Icy
<br />Total Pre-Minmg Material Volume 12,404,306 bcy 31,738,823 bcy ~,
<br />Post Mining Material Volume Calculaticns ~I •
<br />Post Mining Spoil Material Calculated:
<br />Post Mining Spoil Material Volume Ilnternall 9,967,208 cy 31,502,979 cy
<br />Post Mining Spoil Material Volume IExternall 188,012 cy _ ~~
<br />Total Post Mining Spoil Volume 10,153,220 cy 31,502,979 cy
<br />Post Mining Overburden Material Excavated
<br />Pre-Mining Total Pit Spoil Volume 11,062,695 cy 30,858,801 cy
<br />Pos[ Mining Overburden Material IExternall 99,612 cy _
<br />Total Overburden Material Excavated ISwelledl 11,162,577 cy 30,858,801 cy
<br />Post Mining Material Volume Comparison
<br />Total Post Mining 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
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<br />4 Revised 2/99
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