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• 2.05.3(6) Overburden <br />In Mining area 3 a typical pit is ninety feet wide and <br />extends from outcrop to outcrop or outcrop to the economical <br />mining line. The length of the pits will vary from 300 to 4,500 <br />feet. Refer to the Strip Layout, Drawing No. 134 for the location <br />and dimensions of the pits. <br />Spoil from the first pit and portions of the third pit in <br />Area 3 will be excavated and placed off the coal in a spoil pile. <br />Approximately 250,000 cubic yards will be placed in the spoil pile. <br />After the removal of all recoverable coal from the first pit, the <br />overburden and other spoil material from the second pit will be <br />backfilled into the first pit. <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 amount <br />of topsoil that will be replaced on the pit. The spoil volume is <br />the amount of overburden less topsoil, multiplied by a 1.3 swell <br />factor. <br />MINING AREA N0. 3 <br />PIT VOID SPOIL PIT VOID SPOIL <br />• 1 59833 76337 14 378767 452673 <br />2 79083 100062 15 348108 417595 <br />3 229850 288545 16 294667 356122 <br />4 267525 334171 17 269667 323622 <br />5 309733 381894 18 262083 316292 <br />6 353533 431604 19 267833 325283 <br />7 374358 451776 20 265583 324525 <br />8 395608 474099 21 270000 327125 <br />9 416433 498795 22 219917 264690 <br />10 407333 486315 23 213917 256673 <br />11 423083 503583 24 176083 209043 <br />12 413600 493970 25 97083 115120 <br />13 410250 490352 <br />The spoil from the firs <br />the spoil from the third pit <br />can be see from the above <br />throughout the mining area. <br />t pit and about 167,000 cubic yards of <br />will be placed in the spoil pile. It <br />table that there is excess spoil <br />• <br />2.05-12i <br />July 1992 <br />