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

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overlies a clay subsoil and substratum. This soil has a deeper profile than Abor, has a lighter colored surface horizon than Morapos, and lacks a sodic clay accumulation zone like Spicercon variant. The recommended topsoil salvage depth is based exclusively on the thickness of the surface A horizon since subsurface clay levels are unsuitable. The clay content at the surface is alleviated by a friable consistence, a moderate saturation percentage, and a higher organic master content. Topsoil salvage should be terminated at the top of the cambic IBwI horizon. The mean in situ suitable topsoil depth for four profiles is eleven inches (Appendix 9-61. The 10B, 10C, and 10D map units consist of 85 percent Bulkley with 6 percent each of Abor and Spicerton variant, and 3 percent Morapos 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. 11C, 11D-Binco Clay Loam. The Binco clay loam map units occur on the strongly sloping to moderately steep cottuvial fans, sideslopes, and toeslopes. The soil profile is deep with a thin light colored surface horizon which overlies a clay subsoil and substratum. Adjacent Aaberg and Aaberg variant soils have moderately deep and shallow profiles, respectively. Buckskin soils have dark colored surface horizon and subsoil clay accumulation. The recommended topsoil salvage depth is based on the thickness of the surface horizon since subsurface clay levels are unsuitable. Topsoil salvage should be terminated near the top of the cambic fecal horizon. The mean in situ suitable topsoil depth for 12 profiles is 5 inches (Appendix 9-61. The 11C and 11D map units consist of 85 percent Binco with 7 percent Aaberg, 5 percent Buckskin, and 3 portent Aaberg variant inclusions (Appendix 9-2, Table 11• A 0.5-foot mean salvage depth was used for these map units to calculate recoverable topsoil volumes listed in Table 21-1 and Exhibit 9-1. 12C, 12D, 12E-Buckskin Loam. Buckskin loam soils occur on strongly sloping to steeply sloping mountain sideslopes and ridgetops. The soil profile is deep and well developed 14 Revised 06/24/91