PERMFILE100128 - Laserfiche WebLink

Home Browse Search

I • conclusion of this study can be seen in Table 2.05.4(2)(d)-2. The study shows that New Horizon 2 will be topsoil deficient in Lift 1 of the two lift irrigated pasture reclamation portion. This Lift 1 has typically come from the first lift of the 30C soil group. To correct this shortage, WFC will substitute excess soil type 808 from the major drainage directly north of Pond 007 for Lift 1. During Phase 6 topsoil campaign, 2.4 feet of 808 soil was removed from the drainage area and used for mixed topsoil replacement. The soil map shows the 808 depth being 2.4 feet in the drainage area. There is more 808 to be salvaged. The 808 soil looks good and should make great Lift 1. WFC will test the remaining 808 to verify its quality. The topsoil balance study also shows the 15 acres of soil type D70B was originally over reported. WFC knew this because when the topsoil was being salvaged in 1993, we were not recovering the topsoil volumes the topsoil map was depicting. This shortage was reported to the Colorado Division of Minerals and Geology inspector at that time. In the fall of 1995, all salvaged D70B Lift 1 was redistributed onto the designated area. 6.73 acres were covered at 0.8 feet before the stockpile was depleted. The postmine vegetation map in Exhibit 2.05.4.4 has been modified to reflect actual conditions. • Topsoil Salvage Depths - 1999. In 1998 WFC conducted a detailed soil survey and topsoil salvage depth survey (Map 2.04.9-1) forthe proposed mine permit expansion area. This included land to the north and west of present operations. The conclusions of this study are in Table 2.05.4(2)(d)-3. Topsoil Salvage Techniques -1988 and 1999. Before any area at the proposed New Horizon Mine 2 site other than a topsoil stockpile site is significantly disturbed, the suitable topsoil material will be removed to the depth specified in Table 2.05.4(2)(d)-1, Table 2.05.4(2)(d)-2, Table 2.05.4(2)(d)-3, and Map 2.04,9-1. Suitable topsoil will be salvaged from all significant disturbance areas including sediment ponds (includes pond area, embankment, and spillway), mining activities, spoil stockpiles, haul roads, access roads, mining area (includes box cut spoil and highwall reduction area) shop area, and diversion ditches. Topsoil will be removed from all cut and fill slopes. No topsoil will be salvaged from the light use roads utilized for environmental monitoring or power line corridors, except where cut and fills are required. Prior to topsoil removal, vegetation which is too large for incorporation into the topsoil will be scraped away and (Revised ~-ie-zoom 2.05.4(2)(d)- 9