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• occurs during resaturation and tillage operations. The minimum mean soil replacement <br />thickness for bond liability is 1.0 feet. <br />Soil Balance. Peabody is submitting the soil balance with the Annual Reclamation Report as <br />required by Permit C-80-005, Tab 13, Page 13-29c and as recommended by Section 2.04.13(2) of <br />Colorado's Regulations for Coal Mining. The soil balance is completed to ensure soil is <br />salvaged, stockpiled, and replaced as recommended end approved in the permit, and, if <br />necessary, to readjust the soil salvage and redistribution thickness. The sail information <br />is also used to update the soil volume information Peabody submitted with the 1991 Annual <br />Reclamation Report (PC C, 1992) and confirm the mean soil replacement thickness for the <br />life-of-mine disturbance area at Seneca II Mine. <br />Soil Salvage and Storage. Soil salvage (disturbance) areas end soil stockpile sites as of <br />December 31, 1992 are shown on Exhibit 92.3, Soil Balance Map. The following technique was <br />used to prepare the 1992 Soil Balance Map. The soil selvage area and existing soil <br />stockpiles, as of December 31, 1992, were transferred from the Seneca II Pit Progress and <br />Reclamation Map to a 1"=400' scale Existing Contours Map dated October 11, 1992. This <br />• disturbance area, provided by the Seneca II engineering staff, was confirmed by overlying <br />the black and white 1"=400' scale aerial photo dated October 11, 1992 (Exhibit 92.6), <br />overlying the Soil Balance PLen, Exhibit 91.3, from the 1991 Annual Reclamation Report, end <br />by on-site field checks on'OCtober 6 and 14, 1992. The remaining soil salvage areas and <br />effected lands boundary for the remainder of Seneca II Mine, are shown on Exhibit 92.3, <br />1992 Soil Balance Map. The soil salvage areas were determined from the estimated limits of <br />mining and reclamation disturbance shown on the Backfilling and Grading Schedule, Exhibit <br />13-2, dated 61(16193. Soil map units for the undisturbed areas were transferred from the <br />baseline soil map, Exhibit 9-1, Soil Types and Semple locations (dated Mey 13, 1988). <br />The projected soil salvage areas, soil salvage thickness, end soil volume for each soil <br />type for the remainder of Seneca II Mine ere listed in Table 92.2. The soil salvage <br />thicknesses ere identical to those utilized for [he 1991 Annual Reclamation Report (PC C, <br />1992). It is projected 173.9 acre-feet of soil remain to be salvaged within the permit <br />area. <br />All existing soil stockpile locations (13 total) are shown on Exhibit 92.3. Soil stockpile <br />. volume information is presented in Table 92.3. During the past year, the soil reserve at <br />former stockpile sites EE and JJ, shown on Exhibit 91.3 (PCC, 1992), was replaced on 30.7 <br />4 <br />