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• Soil Salvaee and Storaee The disturbance area from which soil was salvaged and the soil stockpile sites as of December 3l, 2002 are shown on Seneca II-W Mine 2002 reclamation Map. A small temporary stockpile was established neaz pond 17 consttvc[ion. The actual volume of soil salvaged and stockpiled from 1989 through December 31, 2002 was determined by field survey of existing soil storage stockpiles. The Seneca engineering staff completed the base and existing elevations for each stockpile. The stockpile volumes as of December 31, 2002 are listed in Table 00.1. As of December 31, 2002, 69.7 acre-feet of soil were stockpiled along [he tie-across haul road and 838.9 acre-fee[ of soil were stockpiled in [he mining area. Soil Balance and Replacement The soil balance is calculated for Seneca II-W Mine by comparing the disturbance area that requires soil replacement as of December 31, 2002 with the soil reserve in stockpiles. The disturbance azea for Seneca II- W Mine, shown on the map, with exception to the tie-across haul road, totaled 987.2 acres on December 3I, 2002. No soil was salvaged or needs to be replaced beneath the soil stockpile sites. Also, since Pond 005 • (4.8 acres), Pond 006 (7.9 acres), the Mine Entrance Road, Haul Road A, and Haul Road G are permanent postm~ne facilities (I 1.2 acres), soil will only be replaced on a portion of those roads effectively narrowing them to 20 feet wide. Topsoil has been replaced on 354.6 acres of disturbed area through December 3l, 2002. Therefore, the total disturbance area requiring topsoil as of December 31, 2002 was 608.7 acres a[ the mine site and 96.6 acres for the tie-across haul road. Soil Replacement Thickness The soil replacement thickness for the firs[ five-year permit term was projected to be 1.4 feet for [he mine area and 0.7 fee[ for [he tie-across haul road. The soil balance as of December 3l, 2002 was calculated as follows: Mine Area Total disturbance area Permanent Facilities & Topsoil replaced Disturbance area requiring soil Soil in stockpiles (Table OO.I) Mean replacement depth • Tie Across Haul Road Disturbance area requiring soil 987.16 acres 378.5 acres 608.7 acres 838.9 acre-feet 1.38 feet 96.6 acres Soil in stockpiles (Table 00.1) = 69.7 acre-feet Mean replacement depth = 0.7 feet 3