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The pit in Sections 15 and 16 will be a single seam dragline operation, similar to the current <br />operation in Section 11. To develop the dragline operation, an initial cut must be opened neaz <br />~ - outcrop. A permanent excess spoil fill of approximately 2 million yd3 of excess spoil has been <br />constructed to accommodate the initial cuts. <br />• <br />The West Pit will be a multiple seam operation utilizing [ruck/shovel and dragline methods, <br />similar to the current East pit operation. Approximately 45 million yd3 of box cut material will be <br />placed in an external fill (approximately 22 million yd3)north of the box cut excavation or as <br />backfill (approximately 23 million yd3) in the initial pit area. Over 3 million yd3 will be moved <br />from the external fill and backfilled within the pit limits of the East and West Pits. Approximately <br />19 million yd3 of excess spoil will remain in place as a permanent excess spoil fill, consistent with <br />applicable provisions of Rule 4.09(3). <br />The following is an updated volumetric summary (in millions) of projected Excess Spoil for <br />previous and future mining as of May 2003: <br /> (1) (2) (3) (4) (5) (6) <br /> Overburden Coal' Waste Total Swelled Excess <br /> BCY BCY BCY Excavated Overburden2 Spoil <br /> BCY LCY LCY <br /> <br />Mined as of 6/30/02 708 90 12 810 ~ 864 54 <br />Remaining life of 253 29 6 288 311 23 <br />mine <br />Total Mine 961 119 18 1098 1175 77 <br />'Coal conversion based on 1.1 tons/BCY <br />ZAverage swell of 20 percent <br />Total Mine Excess Spoi] 77 LCY <br />Streeter Fill -47 <br />Wes[ Pit Fill -19 <br />Section 16 Fill - 2 <br />I• <br />Excess Spoil Remaining 9 LCY <br />2.05-36 Revision Date 5/8/03 <br />Revision No. TR-56 <br />