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2.05.3(6) Overburden <br />• A typical pit is ninety feet wide and extends from <br />outcrop to outcrop or outcrop to property line. The length of <br />the pits will vary from 300 to 2,100 feet. Refer to the Mine <br />Plan Map, Drawing No. 115 for the location and dimensions of the <br />pits. <br />Spoil and overburden from the first pit in Area 1 and <br />the first pit in Area 2 will be excavated and placed off the coal <br />in temporary spoil piles 1 and 2 respectively. After the removal <br />of all recoverable coal from the first pit, the overburden and <br />other spoil material from the second pit will be backfilled into <br />the first pit. Spoil from the temporary spoil piles will be <br />placed in the last pit in the respective mining area. <br />The following table shows the spoil and void volume for <br />each pit assuming a 1.3 swell factor. The void volume is the <br />volume of coal and overburden removed from the pit less the <br />amount of topsoil that will be replaced on the pit. The spoil <br />volume is the amount of overburden less topsoil, multiplied by a <br />1.3 swell factor. <br />MINING AREA NO. 1 MINING AREA NO. 2 <br />PIT VOID SPOIL PIT VOID SPOIL <br />1 38000 35533 1 18792 19608 <br />• 2 84500 82767 2 41584 45716 <br />3 93000 94033 3 63375 67492 <br />4 99000 99667 4 80667 87100 <br />5 111000 115267 5 82667 86883 <br />6 110000 113533 6 112958 120792 <br />7 97000 96633 7 114958 123392 <br />8 86000 82333 8 135750 136825 <br />9 78000 71933 9 133750 147225 <br />10 69000 59692 10 133750 140725 <br />11 80000 73992 11 136750 153617 <br />12 86000 80492 12 141750 153508 <br />13 121333 112980 13 147250 154808 <br />14 62500 58717 14 140250 150692 <br />15 61000 56225 15 145750 154375 <br />16 59000 53625 16 144750 154375 <br />17 71000 62942 17 146250 156975 <br />18 72000 64242 18 158750 156975 <br />19 71500 63808 19 148042 155567 <br />20 31000 27625 20 148042 155675 <br />• 2-05-11 May 1991 <br />