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PROJECTED MATERIAL BALANCE <br />STAGES 1 THROUGH d <br />BOURG STRIP MINE <br /> Coal Produced Overburden Total Pit <br />Sta a Tonnage Volume BCY * Volume(BCY) Volume(yd3) <br />1 150,000 139,500 583,800 723,300 <br />2 150,000 139,500 513,000 652,500 <br />3 150,000 139,500 535,900 675,400 <br />4 150,000 139,500 735,900 875,400 <br />Swollen Swollen <br />Overburden Vol Overburden Vol <br />Assuming 10% Assuming 20% <br /> <br />642,180 700,560 <br />564,300 615,600 <br />589,490 643,080 <br />809,490 883,080 <br />TOTAL: 600,000 558,000 yd3 2,368,600 yd ,926,600 yd3 2,605>460 yd3 2,842,320 yd3 <br />otal Pit Volume 1.236 Therefore, an inherent overburden swell factor <br />otal Overburden would be necessary to achieve approximate <br />Volume (BCY) original contour of the backfilled pit. <br />(* Coal Volume calculations assume Catapillar Handbook in-place coal density <br />for Bituminous Coal of 2150 pounds{cubic yard) <br /> <br /> <br />