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Peabody is submitting the soil balance with the Annual Reclamation Report as required by Permit C-80-005, Tab 13, Page 13.29c and as recommended by Section 2.04.13(2) of Colorado's Regulation for Coal Mining. The spoil quality, soil thickness, soil and spoil fertility, and plant rooting depth data for the 1990 field season will be compiled and presented with the 7991 Annual Reclamation Report. Soil Balance The following soil information is submitted to update the topsoil volume information Peabody submitted with the Fourth Annual Topsoil end Spoil Monitoring Report, to estimate the mean soil replacement thickness for the remaining disturbance area at Seneca II Mine, and to satisfy the annual soil balanee permit condition. The soil balance is completed tc ensure that soil is salvaged, stockpiled, and replaced es recommended end approved in the permit, and, if necessary, to readjust soil salvage and replacement depths. Soil Salvage. Soil salvage (disturbance) areas for the 1990 field season are shown on Exhibit 90.1. Soil was removed from 18.2 acres ahead of the active Volf Creek pit. The soil salvage areas, as of December 35, 1990 were transferred from the Seneca II Pi[ Progress end Reclamation Map to a 7"=400' scale existing contours map dated December 11, • Thi disturban e 1990 area rovided b the Seneca II en ineerin was confirmed staff . s c , p y g g , by overlying the black and white 7~'=400' scale aerial photo and by an on-site field check. Soil salvage areas for the remainder of Seneca II Nine, including the 1990 disturbance area, ere shown on Exhibit 2, Topsoil Balance Plan - 7989 Field Season (PCC, 7990). Soil map units for the undisturbed areas ere identified on the baseline soil map, Exhibit 9-1, Soil Types and Sample Locations (dated May 73, 1988). The projected soil salvage areas, soil selvage thickness, end soil volume for each soil type for the remainder of Seneca II Mine ere listed in Table i. The topsoil salvage depths are identical to those utilized for the Fourth Annual Topsoil and Spoil Monitoring Report (PCC, 1990). It is projected that 237.1 acre-feet of soil remain to be salvaged within the permit area. Soil Storage. All existing topsoil stockpiles locations (75 total) are shown on the enclosed Exhibit 90.1. Topsoil stockpile volume information is presented in cable 2. During the pest year, the soil reserve at stockpile site 2 was completely exhausted and approximately 41.2 acre-feet of soil was removed from Site P. Site 00 was resurveyed end • shown to contain 21.0 acre-feet of soil. Approximately 492 .8 acre-feet of soil was stockpiled as of December 37, 1990. 2