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and organic matter. Salinity values (EC) are also very suitable for soil material. The <br />laboratory data indicate no fertilizer supplements will be needed for successful revegetation. <br />Soil Balance <br />The following soil balance information is submitted with [he Annual Reclamation Report as <br />recommended by Section 2.04.13(2) of Colorado's Regulations for Coal Mining. This soil <br />balance has been completed to ensure soil is replaced as recommended in the permit, readjust <br />soil redistribution thickness, if necessary, and update the soil volume information submitted <br />with the 1989 Annual Topsoil Balance and the 1990 Annual Reclamation Reports (PCC, 1989 and <br />PCC, 1991). <br />The updated soil balance information is based upon the January 31, 1992 reclamation progress <br />map and disturbance lines (see enclosed Exhibit 92.1), soil replacement areas outlined on <br />Exhibits 21.1 and 21-2, Volume 14 of Permit C-81-008, existing disturbance areas shown on the <br />enclosed Exhibit 92.2, and current volumes of soil contained in stockpiles. <br />Soil Salvage end Storage <br />• All suitable soil has been salvaged ahead-of-mining within the current Nucla Mine permit <br />boundary. About 0.4, 2.5 and 7.3 acre feet of soil is presently stored et three stockpile <br />sites, 2/3, 8 and 13, respectively (see Exhibit 92.2 for locations). The volume of soil <br />stored et site 2/3 has not changed since the pile was surveyed in 1983. Considerable soil vas <br />removed from Sites 8 and 13 for replacement on 59.4 acres of final graded land in Mining Area <br />1. The volume of soil currently stored et Sites 8 and 13 vas determined on Mey 21, 1992 by <br />spacing auger holes on a 100 foot grid over the entire stockpile area. A brief soil <br />description, including color, horizon, presence of caliche, end thickness, vas prepared et <br />each site to determine the thickness of stockpiled soil overlying undisturbed native soil. <br />The mean thickness of soil for ell auger sites et each stockpile wee multiplied by the <br />encompassing stockpile area to determine the volume of soil currently scored at sites 8 and <br />13. About 10.2 acre feet of soil remain et the three stockpile sites. <br />Soil Reol acement <br />Approximately 6.7 acre feet of soil is required [o be replaced on the existing disturbance <br />area (Category 1) shown on Exhibit 92.2. The remaining 3.5 acre feet of soil will be used, if <br /> required, on an as-needed basis for repairing previously soiled areas or reclaiming the <br /> facilities (roads, ponds, shop area) in Categories 2 end 3 shown on Exhibit 92.2. <br /> <br />4 <br />