Laserfiche WebLink
10.2 Bench 1 and Topsoil Placement Equipment and Practices <br />Bench 1 material will be placed via haul truck and dozer. Prior to the placement of any material, <br />stakes will be placed in the Bench 1 overburden and marked with the height that bench 1 must be <br />placed to. These stakes will be placed in the overburden. Dozer operators will then spread the <br />bench 1 over the area to the height marked on the stakes. This same procedure will be repeated <br />for topsoil (Lift A, B, or Mixed). <br />Each topsoil and bench 1 lift will be placed at its final thickness over whatever area a single <br />truck load can cover at a given time. When a truck load is dumped onto an area, the dozer <br />operator will only spread the material out over an area that can be covered at the required <br />thickness. This will minimize compaction, since the dozer will not be retreading over previously <br />placed material to place a new layer. This process 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 <br />are discussed in the following subsections. <br />11.1 Topsoil Replacement -1988 and 1995 Study Areas (East of 27.00 Road) <br />These study areas are located east of 27.00 Road. As of February, 2008, this area has been <br />stripped, replaced and reclaimed. The various tracts had different topsoil placement thicknesses <br />depending upon landowner and land use. The material replaced, as reported in the Annual <br />Reports, is shown on Map 2.05.4-4. As is seen from the Map, most of the area was stripped and <br />replaced in 2 lifts. In some cases, 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 <br />amount predicted from the soil survey. WFC proposed the use of selected overburden or <br />interburden materials, approximately 33,600 cubic yards as topsoil substitutes or plant seedbed <br />media for this area, which is 9.7 acres immediately north and west of Pond 007. See Map 2.05.4- <br />4. This is based on the fact that this area had poor topsoil in the beginning (Soil Unit 810), and <br />the lower than anticipated recovery of 80 percent for the remaining Soil Units 1E, 1 EW, 808, <br />30C in the surrounding area. The substitute soil was shown to be acceptable for reclamation. <br />This change was approved and the replacement work was completed. As of February, 2008, <br />these reclaimed areas appear to be doing well and will meet the bond release criteria. As of June <br />2010, much of the area has obtained or is about to obtain Phase 2 bond release. <br />January 2016 (TR -70) 2.05.4(2)(d)-13 <br />