Laserfiche WebLink
• Soil Salvage and Storage <br />The disturbance area from which soil was salvaged and the soil stockpile sites as of <br />December 31, 1997 are shown on drawing Y97TSREM. During 1997, all soil was imported [o <br />stockpiles E, E and G. <br />The actual volume of soil salvaged and stockpiled from 1995 through December 31, 1997 was <br />determined by field survey of existing soil storage stockpiles. The base and existing <br />elevations for each s[ock.pile were complei ed by the Seneca II-W engineering staff. The <br />stockpile volumes as of December 31, 1997 are listed in Table 97.1. As of December 31, <br />1997, 262.7 acre-fee[ of soil were stockpiled in the mtnrng area. <br /> Soil Balance and Replacement <br /> <br /> The soil balance is calculated for Yoast Mine by comps ct ng the discurbance area that <br /> c ey urres soil replacement as of December 31, 1997 wish the soil reserve in stockpiles. The <br /> disturbance area for Yoast Mine, shown on drawing Y97TSREM, totaled 266.9 acres on December <br /> 31, 1997. No soil was salvaged or needs to be replaced beneath the soil stockpile sr[es. <br /> Also, Haul Road A and Haul Road B ace permanent postmine to cilitres 19.9 acresl, soil will <br /> only be [eplaced on a po rt ron of [hose roads effecctvely narrowing them to 20 feeC wide. <br /> Topsorl has been replaced on 63 .3 aces of disturbed area through December 31, 1997. <br /> Therefore, the [oral disturbance area requiting topsoil as of December 31, 1997 was 193.7 <br />acres at the mine site. <br />Soil Replacement Thickness <br />The soil replacement thickness for the first five-year permit term was projected to be 1.0 <br />feet for the mine area. The sorl balance as of December 31, 1997 was calculated as follows: <br />Mine A[ea <br />Total disturbance area = 266.9 acres <br />Permanent Facilities 6 Topsoil replaced = 1 73.21acres <br />Disturbance area rey ui ri ng soil = 193.7 acres <br />Soil in stockpiles (Table 97.11 = 262.7 acre-feet <br />Clean ceplacemenc depth = 1.4 feet <br />• By dividiny Che soil available by the area requiring scil replaced, we aru ve at the 1997 <br />soil balance thickness of 1.4 fee[ for [he mine area. <br />3 <br />