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• Soil Salva¢e and Storaee <br />The disturbance area from which soil was salvaged and the soil stockpile sites as of December 31, 2001 are <br />shown on ARR map. Stockpiles TT, XX, YY and W W were established during the 2001 field season. <br />The actual volume of soil salvaged and stockpiled from 1989 through December 31, 2001 was determined <br />by field survey of existing soil storage stockpiles. The Seneca engineering staff completed the base and <br />existing elevations for each stockpile. The stockpile volumes as of December 31, 2001 aze listed in Table <br />00.1. As of December 31, 2001, 69.7 acre-feet of soil were stockpiled along the tie-across haul road and <br />796.9 acre-feet of soil were stockpiled in the mining area. <br />Soil Balance and Replacement <br />The soil balance is calculated for Seneca H-W Mine by comparing the disturbance area that requires soil <br />replacement as of December 31, 2001 with the soil reserve in stockpiles. The disturbance area for Seneca Q- <br />W Mine, shown on the map, with exception to the tie-across haul road, totaled 959.0 acres on December 31, <br />2001. No soil was salvaged or needs to be replaced beneath the soil stockpile sites. Also, since Pond 005 <br />{4.8 acres), Pond 006 (7.9 acres), the Mine Entrance Road, Haul Road A, and Haul Road G are permanent <br />• postmine facilities (11.2 acres), soil will only be replaced on a portion of those roads effectively narrowing <br />them to 20 feet wide. Topsoil has been replaced on 347.8 acres of disturbed area through December 31, <br />2001. Therefore, the total disturbance area requiring topsoil as of December 3l, 200 t was 587.8 acres at the <br />mine site and 96.6 acres for the tie-across haul road. <br />Soil Replacement Thickpess <br />The soil replacement thickness for the first five-year permit term was projected to be ]3 feet for the mine <br />area and 0.7 feet for the tie-across haul road. The soil balance as of December 31, 2001 was calculated as <br />follows: <br />Mine Area <br />Total disturbance area = 959.0 aaes <br />Permanent Facilities & Topsoil replaced = 371.2 acres <br />Disturbance area requiring soil = 587.8 acres <br />Soil in stockpiles (Tab[e 00.1} = 796.9 acre-feet <br />Mean replacement depth = 1.36 feet <br />• Tie Across Haul Road <br />Disturbance area requiring soil - 96.6 acres <br />Soil in stockpiles (Table 00.1) = 69.7 acre-feet <br />Mean replacement depth = 0.7 feet <br />3 <br />