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s 1990 ANNUAL RECLAMATION REPORT 1990 Disturbente Areas The 1990 Annual Reclamation Report, Exhibit 90.1, shows the limits of disturbance as of January 1, 1990 and January 1, 1991. This line generally depicts areas of topsoil removal ahead of mining. In many instances the January 1, 1990 line and January 1, 1991 line are one in the same, that is, additional topsoil was not removed during 1990. Actual disturbance ahead of mining for 1990 was tB.2 acres in the Wolf Creek mining area and 0.0 acres in the Wadge mining area. Backfilling and Grading The 1990 Annual Retlamation Report, Exhibit 90.1, shows the areas that were graded during 1990. There were 23.1 acres graded in the Wolf Creek mining area and 26.9 acres graded in the Wadge mining area. In addition, 31.6 acres of haul road were graded between the two mining areas. Cros s-sections were generated in both areas to compare the graded areas with the proposed topography. Existing topography Cross-section K-K', Exhibit 9D.4, compares the existing graded area with the proposed postmining topography in the Wolf Creek mining area. Existing Topography Cross section L-L', Exhibit 90.5, compares the • existing graded area with the proposed postmining topography in the Wadge mining area. Existing Topography Cross-sections M-M' end N-N', Exhibit 90.6, compare the existing (ungraded) conditions with the proposed topography et the lower end of the Wadge mining area. Volumetric calculations were generated using a computer program from DCA Engineering software. Calculations were done to determine the amount of spoil placed on the highwell at the lower end of the open pits. The existing topography map (12-11-90) was compered to the proposed topography map (Exhibit 12-9, Seneca II permit). The calculations show approximately 500,000 ty of spoil (benches) must be moved to achieve the proposed topography. This material will be moved up the hill and placed in the area presently occupied by the lower ramp. Soil and good Monitoring Data Peabody Coal Company is required by Permit C-80-005 to monitor replaced soil and final graded spoil et Seneca II Mine. Monitoring programs include verifying soil replacement thickness, determining final graded spoil. quality, determining soil end spoil fertility, measuring plant rooting depth, recording the source of replaced soil, end completing an • annual soil balance. 1