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10.2 Subsoil and Topsoil Placement Equipment and Practices <br />Subsoil (Lift B or Mixed) material will be placed via haul truck and dozer. Prior to the placement of any <br />material, stakes will be placed in the Bench 1 overburden and marked with the height that subsoil must be <br />placed to. These stakes will be placed in the overburden on a grid of 1 00' x 100'. Dozer operators will then <br />spread the subsoil over the area to the height marked on the stakes. This will ensure that subsoil is placed <br />at the appropriate thickness. These stakes will be removed after all subsoil has been placed on a 10 acre <br />area. This same procedure will be repeated for topsoil (Lift A or Mixed). <br />Each topsoil and subsoil lift will be placed at its final thickness over whatever area a single truck load can <br />cover at a given time. When a truck load is dumped onto an area, the dozer operator will only spread the <br />material out over an area that can be covered at the required thickness. This will minimize compaction, <br />since the dozer will not be retreading over previously placed material to place a new layer. This process <br />will take place for each lift placed. <br />11.0 Topsoil Replacement <br />The topsoil replacement for the mine is divided into the three original topsoil study areas. These are <br />discussed in the following subsections. <br />11.1 Topsoil Replacement -1988 and 1995 Study Areas (East of 2700 Road) <br />These study areas are located east of 2700 Road. As of February, 2008, this area has been stripped, <br />replaced and reclaimed. The various tracts had different topsoil placement thicknesses depending upon <br />landowner and land use. The material replaced, as reported in the Annual Reports, is shown on Map <br />2.05.4-4. As is seen from the Map, most of the area was stripped and replaced in 2 lifts. In some cases, <br />the combined lift thickness is reported on the Map. <br />During the topsoil stripping, a deficit was encountered in the amount stripped compared to the amount <br />predicted from the soil survey. WFC proposed the use of selected overburden or interburden materials, <br />approximately 33,600 cubic yards as topsoil substitutes or plant seedbed media for this area, which is 9.7 <br />acres immediately north and west of Pond 07. See Map 2.05.4-4. This is based on the fact that this area <br />had poor topsoil in the beginning (Soil Unit 810), and the lower than anticipated recovery of 80 percent for <br />the remaining Soil Units 1 E, 1 EW, 808, 30C in the surrounding area. The substitute soil was shown to be <br />acceptable for reclamation. This change was approved and the replacement work was completed. As of <br />February, 2008, these reclaimed areas appear to be doing well and will meet the bond release criteria. <br />August 2013 (PR -08) 2.05.4(2)(d)-16 <br />