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aerial photo dated October 20, 1995, overlaying the Soil Balance Plan Exhibit 93.3, from <br />the 1993 Annual Reclamatlon report and by on-site field checks. No further soil salvage <br />areas are projected or included in this soil balance since no additional disturbance is <br />necessary at this time. All existing soil stockpile lots [ions (12 total) are shown on <br />Exhibit 9-3a. Topsoil stockpile volume information is presented in Table 95.1. <br />Approximately 340.9 acre-feet of soil was stockpiled ae of December 1, 1995. Topsoil <br />salvaged Erom ahead of the Wolf Creek pit (2 .7 acres) was direct hauled to graded Wedge <br />spoil east of the powder storage area and the Wolf Creek Spoil north of the active pit. <br />Topsoil removed ahead of the Wadge pit (1.3 acres) was direct hauled to the spoil south of <br />the active Wadge pit (see Exhibit 9-3b). <br />Soil Redistribution Thickness Updated <br />The mean soil redistribution thickness is calculated by comparing the disturbance area that <br />requires soil replacement as of December 1, 1995 with the soil reserve currently in <br />stockpiles. The disturbance area requiring topsoil was de [ermined Erom the shaded areas on <br />Exhibit 9-3a. The disturbance area requiring soil replacement as of December 1, 1995 <br />totals 627.2 acres. <br />As of December 1, 1995 [here were 340.9 acre-feet of stockpiled soil. As part of approved <br />postmine land use plan there will be approximately 28,800 feet of haul road which will be <br />narrowed to 30 feet in width (19.8 acrea~ and act as a permanent access road. This area is <br />included in the shaded portion of Exhibit 9~3a. Therefore, the total area requiring <br />topsoil is 607.4 acres. Two additional areas, sedimentation Ponds 004 dnd 008 were no[ <br />included in the disturbance acres requiring topsoil. In a aubsequen[ revision, Seneca will <br />request these two ponds covering 9.5 acres also become part of the approved poet mine land <br />use plan. By dividing the number of acre-feet of available soil (340.9) by the number of <br />acres of existing, disturbance (607.4), it is estimated 0.5 feat of suitable soil is <br />available [o be replaced. The average thickness of replaced soil is likely to exceed 0.5 <br />feet as the stockpiled soil swells during redistribu [ion. No figures for swelling or <br />compaction of the topsoil replacement process were included in the calculations above since <br />no exact shrink/swell factors have been determined from field studies at the Seneca II <br />Mine. <br />The soil replacement thickness for the remaining permit term was projected to be 1.0 Eeet <br />(Permit C-80-005, Tab 9, Attachment 9-9) The balance completed above shows at least and <br />average of 0.5 feet of soil will be available to be replaced on the existing disturbed <br />areas. As is stated in the permit on Pages 9-41 and 13-11, current literature and on-site <br />4 <br />