2012-01-06_PERMIT FILE - C1982057 (33)

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76, 7C-Morapos -Clay Loam. The Morapos clay loam map units occur on the gently to strongly sloping hillsides and benches along the tie-across haul road corridor. The soil profile is deep antl well developed with a dark colored surface horizon and subsoil clay accumulation. Adjacent Bulkley soils lack a mollic epipedon and an argillic horizon. The recommended topsoil salvage depth is based exclusively on the thickness of the surface mollic epipedon and transitional horizons since subsurface clay levels are unsuitable. Topsoil salvage should be terminated at the top of the argillic Ietl horizon. The in situ suitable topsoil depth for 1 profile is 13 inches (Appendix 9-61. The 7B and 7C map units consist of 90 percent Morapos with 10 percent Bulkley inclusions (Appendix 9-2, Table 1). A 1.0-foot mean salvage depth was used for these map units to calculate recoverable topsoil volumes listed in Table 21-1 and Exhibit 9-2 X8D, X8E, X8F-Winevada-Splitro Loam Complex. These map units are located on the moderately steep to very steep bedrock controlled sideslopes, swales, and ridges. These soils are shallow to moderately deep, lack significant subsoil/substratum profile development, and typically have afine-loamy particle size control section. The recommended topsoil salvage depth for both soils is based solely on the depth to sandstone bedrock. The mean in situ suitable topsoil depth for 26 Splitro profiles is 16 inches (Appendix 9-61. The mean in situ suitable topsoil depth for 30 Winevada profiles is 2$ inches fAppendix 9-6). The XSD, X8E, and X8F map units consist of 50 percent Winevada and 35 percent Splitro with 4 percent each of Coutis and Foidel, 2 percent Cochetopa variant, and 1 percent each of Routt, Skyway, Aaberg, Binco, and Rock Outcrop inclusions (Appendix 9-2, Table 11. A 2.0-foot mean salvage depth was used for Map Units XSD, X8E, and X8F to calculate recoverable topsoil volumes listed in Table 21- 1 and Exhibit 9-1. This topsoil salvage depth figure accounts for inclusions and topsoil loss during salvage due to brush clearing. 106, 10C, 10D-Bulkley Clay. The Bulkley clay map units occur on the gently sloping to moderately steep hillsides and colluvial sideslopes along the tie-across haul road corridor. The soil profile is deep with a thin light colored surface horizon which 13 Revised 06/24/91