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Soil Balance and R <br />l <br />t <br /> ep <br />acemen <br /> The soil balance is calculated for Yoast Mtne by comparing the disturbance area that <br /> requires soil replacement as of December 31, 1998 with the soil reserve in stockpiles. The <br /> disturbance area for Yeast Mine, shown on drawing Y98TSREM, totaled 391.5 acres on December <br /> 31, 1998. No soil was salvaged o r needs to be replaced ben each the soil stockpile sites. <br /> Also, Haul Road A and Haul Road B ate permanent postmi ne facilities (9.9 acres), soil will <br /> only be replaced on a portion of those roads effectively narrowing them [0 20 feet wide. <br /> Topsoil has been replaced on 63 .3 acres of disturbed area through December 31, 1998. <br /> Therefore, the total disturbance area cequi ring topsoil as of December 31, 1998 was 318.3 <br /> acres a[ 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 [he mine area. The Boll balance as of December 31, 1998 was calculated as follows: <br />Mine Area <br />Total disturbance area 391. 5 acres <br />• <br />Permanent Facilities d Topsoil replacetl = ( ~3. 2 (acres <br />Disturbance area requiring soil = 318. 3 acres <br />Soil in stockpiles (Table 98.1 = 449. 8 acre-feet <br />Mean replacement depth available = 1. 4 feet <br />By dividing the soil available by the area requiring soil replaced, we arrrve a[ [he 1998 <br />soil balance thickness of 1.4 feet for the mine area. More than enough topsoil has been <br />salvaged to reclaim [he existing disturbance with the permitted replacement thickness of <br />1.0 fee[. <br />Rev eg elation <br />Revegetation activities in 1998 rn cl uded no permanent revegetation. All stockpiled topsoil <br />was seeded with the Topsoil Stockpile Mix, (see [able 98.2(. Some spot spraying for <br />burcdock was done near the powerLlne crossing. SCC reclamation technician used 2,9-D mixed <br />2 gal per 100 gallon of water for this spot spray. Also, two small patches of Canada <br />thistle were sprayed on the "A" haul road near the powerlines with [he same herbicide <br />mixture. <br /> <br />3 <br />