2016-05-03_PERMIT FILE - C1981008A (19)

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or large front end loaders in front of the active pit to the final graded backfill. WFC is committed to salvaging and redistributing all available topsoil. As of June 2010, the only areas from the original permit that still requires topsoil replacement are the haul road, the overburden stockpile and some other minor areas. These areas cannot be re-topsoiled until the mine is in final reclamation. 16.2 Topsoil Salvage Thickness -1996 Study Area This study addresses the additional permit area immediately east of 27.00 Road and south of BB Road, which is an area of 105.8 acres. See Map 2.04.9-1 for the boundary of this area. At the conclusion of Phase 6 topsoil removal campaign (12-20-95), WFC conducted a topsoil balance study for the approved permit boundary. The study included the entire New Horizon 2 mining area. The remaining undisturbed acreage that topsoil will be salvaged from plus the topsoil that was placed in topsoil stockpiles at the beginning of mining was taken into account. All disturbed acreages were taken into account. The conclusion of this study can be seen in Table 2.04.9-6. The study shows that New Horizon 2 will be topsoil deficient in Lift A of the two lift irrigated pasture reclamation portion. This Lift A 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 A. 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 A material. WFC will test the remaining 808 to verify its quality. As of February 2008, these areas have been fully reclaimed to the topsoil thickness shown on Map 2.05.4-4. Initially, it was reported that an area of approximately 6.73 acres immediately east of Mount Nucla (box cut overburden stockpile) was only covered with 0.8 feet of topsoil. This was incorrect. The postmine topsoil replacement map, Map 2.05.4-4 shows the actual replacement, which is 18" of Lift A and 27" of Lift B. 16.3 Topsoil Salvage Thickness -1998/1999 Study Area In 1998 WFC conducted a detailed soil survey and topsoil survey (Map 2.04.9-1) for the proposed 1998/1999 mine permit expansion area. This included land to the north of BB Road and west of 27.00 Road. The conclusions of this study are in Table 2.04.9-3 and 4. These tables are based on the volumes for each soil type. All topsoil stripping has been completed on the New Horizon Mine, therefore the soil tables below are for historical reference only. January 2016 (TR -70) 2.04.9-18