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The pit in Sections 15 and 16 will be a singl=_ seam dragline operation, <br />similar to the current operation in Section 11. To develop the dragline <br />operation, an initial cut must be opened near outcrop. An external fill <br />of approximately 2.1 million yd' of excess spoil has been constructed to <br />accommodate the initial cuts. <br />C ~ <br />J <br />The West Pit will be a multiple seam operation utilizing truck/shovel and <br />dragline methods, similar to the current East Pit operation. <br />Approximately 45 million yd will be excavated to complete the initial box <br />cut for the west Pit multiple seam pit. Approximately 21.3 million yd' of <br />the 45.0 million yd' box cut will be placed in an external fill north of <br />the box cut excavation. The remaining 23.5 million yd' will be backfilled <br />within the excavation limit of the East and West Pits. <br />The following is an updated volumetric summary (in millions) of projected <br />Excess Spoil for previous and future mining as of October 1996. <br /> (1) (2) (3) (4) (5) <br /> Over- Coal Coal + Swelled Excess <br /> burden Tons Over- Over- Spoil <br /> BCY burden burden= LCY <br /> BCY LCY <br /> <br />Mined as of 10/25/96 494 6B 556 592 37 <br />Remaining life of mine 529 65 589 63~ 46 <br />Total Mine 1023 134 1145 1227 83 <br />Coal conversion based on 1.1 tons/BCY <br />Average swell of 200 <br />Total Mine Excess Spoil 83 <br />Streeter Fill -50 <br />West Pit Fill -21.3 <br />Section 16 Fill - 2.1 <br />Excess Spoil Remaining 9.6 <br />C~ <br />z. ~s- ~s ~~ ~ 19 liSy <br />Revision No. T ~ -~1$ <br />