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• The mine plan Map 5-2 shows the sequence of spoil grading. Map 5-4 shows the final <br />contours in the overall pit azea. There aze also pre-mining and post-mining profiles of <br />the pit area on Geologic Cross Sections A through X. <br />The initial reclamation will be the contemporaneous reclamation of the North Pit as <br />mining occurs. A series of benches will be developed to excavate the coal from the <br />North Pit. Due to the slope it is necessary to shoot the reclamation low wall holes as <br />the mining progresses. Thus, as the entire North Pit has been mined, the reclamation <br />of the low wall will have been completed. The reclamation of the low wall has been <br />more fully described in the reclamation plan. <br />Beginning with Segment 1, Phase I, backfilling and regrading of the spoil will be <br />contemporaneous with the extraction of the coal, as mentioned in Subpart 2.05.3, <br />description of the operation. This will be in conjunction with initiation of spoil <br />placement. Segment 1 is backfilled and regraded, according to Section 4.09.4 of the <br />Performance Standards; subsoil and topsoil will be immediately redistributed. The <br />subsoil and topsoil for these areas has been taken from Segments A-1, D-1, and C-1, <br />from the area along the longitudinal axis of the main open pit as it moves in the bottom <br />of the canyon and, as necessary, from the topsoil and subsoil stockpiles containing <br />surface facilities area soils. This has been referred to as Phase I in the operations <br />description and will be completed in approximately 26 months. Note that not all of this <br />• azea will be completely reclaimed at this time but intermittent during this period of <br />time. An explanation of this and a time frame for the reclamation of those segments <br />follows and will be discussed segment by segment. <br />The backfilling of Segment C-I will begin after approximately 14 months of continuous <br />mining. As of this time, portions of the C-1 Upper benches have been removed. It <br />will be backfilled with spoil from Segments E-1 and F-1 which will be placed in <br />Segment C-1 in a simple sequential backfilling process after the lowest elevation in the <br />C-1 pit is reached. Several benches will be formed during mining, and the overburden <br />from the bench adjacent to, and above the pit, will be shoveled or hauled into the pit. <br />When a pit is completely backfilled and regraded, it will be covered with topsoil and <br />revegetated in the fall after the topsoil is redistributed. The sequence will wntinue <br />through Segment E-1 in Phase I until completely backfilled and regraded <br />(approximately 26 months after mining sequence). Redistribution of the subsoil and <br />topsoil will occur in sequence with mining and spoil grading. As these plans aze <br />formulated, final reclamation will be complete in the fall of the fifth yeaz following the <br />start of mining. <br />Reclamation Costs <br />Cost estimates for the "forfeiture" reclamation scenario have been determined by <br />calculating the costs for reclaiming the pit and applying the topsoil with an optimal <br />• <br />Technical Revision OS (v 1.3) 5-22 Revised 9/1997 <br />