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The actual volume of Boil salvaged and stockpiled from 1989 through December 31, <br />• 1995 was determined b o <br />field surve The base <br />f existin <br />soil stora <br />e stock <br />iles and <br /> y y g <br />p <br />. <br />g <br /> existing elevations for each stockpile were completed by the Seneca.II-w engineering staff. <br /> The stockpile volumes as of December 31, 1995 are listed in Table 95.2, p. B. Ae of <br /> December 1995, 69.7 acre-feet of soil were stockpiled along the tie across haul road and <br /> 525,5 acre-feet of soil were stockpiled in the mine area. <br />Soil Balance and Replacement. <br />The soil balance ie calculated Eor Seneca II-W Mine by comparing the disturbance area [hat <br />requires soil replacement as of December 31, 1995 with the soil reserve in stockpiles. The <br />disturbance area for Seneca II~W Mine, shown on Exhibit 96.2a witR exception eo the tie <br />across haul road. totaled 548.5 acres on December 31, 1995. No soil was salvaged or needs <br />to be replaced beneath any soil stockpile sites. Also, since Pond 005 (4.8 acresl. Pond <br />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 <br />effectively narrowing them to 20 feet wide. Topsoil has been replaced on 107.4 acres of <br />disturbed area through December 31, 1995. Therefore, the to [al disturbance area requiring <br />• topsoil as of December 31, 1995 was 417.2 acres at the mine site and 96.6 acres for the <br />tie-across haul road. <br />Soil Replacement Thickness. The soil replacement thickness Eor the first five year permit <br />term was projected to be 1.3 feet Eor the mine area and 0.7 feet Eor the tie~acrose haul <br />road. The soil balance as of December 31. 1995 was calculated as follows: <br />Total Disturbance area = 548.5 <br />Permanent Facilities 6 Topsoil replaced = (131.31 <br />Disturbance area requ irinq soil = 417.2 acres <br />Soil in stockpiles (Table 95.21 = 525.5 acre~Eeet <br />Mean replacement depth = 1.3 Eeet <br />Tie Aczo9s Haul Aoad <br />Disturbance area requiring soil = 96.6 acres <br />Soil in stockpiles (Table 95.21 = 69-7 acre feet <br />Mean replacement depth = 0.7 feet <br />. By dividing the soil available by [he area requiring soil replaced, the 1995 soil balance <br />is a thickness of 0.7 feet for the tie-across haul road and 1.3 feet for the mine area. <br />4 <br />