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

Home Browse Search

The 66D map unit consists of 85 percent Foidel with 5 percent Foidel variant, 3 percent Coutis, 3 percent Routt, 2 percent Winevada, and 2 percent Cochetopa inclusions (Appendix 9-2, Table 11. A 4.5-foot mean salvage depth was used for Map Unit 66D 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. 70 D-Skyway Silt Loam -This soil unit occurs on moderately steep slopes. The unit consists of 85% Skyway silt loam, 8% Coutis, 4% Winevada, and 3% Splitro. The soil is derived from fine grained sandstone and sihstone. A 2.5-foot average salvage depth was used to calculate the recoverable topsoil volumes listed in Table 21-26 and areas shown on Exhibit 9-3. 101-Ustic Torriorthents-Rock Outcrop Complex. This map unit is located on very steep toeslopes, sideslopes, ledges, and ridgetops near escarpments. Ustic Torriorthent soils have thin light-colored stoney or cobbly surface horizons which directly overlie skeletal substratums. Rock Outcrop areas consist of exposed resistant sandstone or siltstone bedrock in the form of ledges, cliffs, escarpments, and benches. Adjacent soils are non-skeletal with subsoil profile development IChaperton) or have a dark colored surface horizon, subsurface clay accumulation, and skeletal substratum ILymansonl. The 101 map unit consists of 50 percent Ustic Torriorthents and 40 percent rock outcrop with 5 percent each of Chaperton and Lymanson inclusions (Appendix 9-2, Table 11. No suitable topsoil can be salvaged from the rock outcrop portion of this map unit. Six inches of topsoil will be salvaged from the remainder of this map unit provided the salvaged topsoil is suitable, the rock fragment content is less than 35 percent, and the equipment can be operated safely. Therefore, a 0.0-foot topsail recovery is utilized for the rock outcrop portion and 0.5-foot topsoil recovery is used for the soil portion of Map Unit 101 (Table 21-1 and Exhibit 9-11. The topsoil salvage depth figure accounts for inclusions and topsoil loss during salvage due to brush clearing. 103-Roxal Variant (moderately deepl-Lymanson-Starman Complex. This map unit is located on steep to very steep mountain sideslopes, toeslopes, and ridges. Roxal variant and Starman soils have thin light colored surface horizons which directly overlie skeletal substratums. Lymanson soil profiles have a dark colored surface horizon, subsurface clay accumulation, and skeletal substratums. Adjacent soils have dark colored mollic epipedons with no argillic horizon (Splitro, Winevada, and Coutisl, have a fine particle size control section (Aaberg) or have an argillic horizon ILithic Cryoboralfsl. The 1D3 map unit consists of 4D parLanJ Rnxal variant and 25 percent each of Lymanson and Starman with 3 percent each of Lithic Cryoboralfs and Splitro, 2 percent Aaberg, and 1 PR03 20 Revised 4/03