2010-05-07_PERMIT FILE - C2009087 (14)

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. clay, or silty clay texture (marginal rated) (WDEQ, 1996). Clay content exceeding 40 percent was generally rated as "unsuitable" unless other factors prevail. The recommended salvage depths for surface- affected areas are listed in Table 3 and discussed in selected map unit descriptions in the following results section. Topsoil volumes for salvaged soils are included in the project mine and reclamation plan. 3.0 RESULTS 3.1 Soil Maps Map 1 of 3 is the overall soils map of the entire Soils Study Area. The soils mapping was compiled from the recent Order 2 Routt County soil survey (NRCS, 2008), the Order 1 survey areas for proposed surface - affected areas within the current Seneca II Mine permit area, the Order 1 survey area between the Seneca II permit area and the TCC Foidel Creek Mine permit area, and the southern portion of the study area located within the TCC Foidel Creek Mine Permit area. Map 2 of 3 covers the various potential Sage Creek Mine surface disturbance project components within and adjacent to the northern part of the Seneca II Mine permit area and for "Adjacent Areas 1" which is located in the hilly ridge "gap" area that is between the south end of the Seneca II Mine permit area and the north end of the TCC's Foidel Creek Mine permit area. New soil sample sites CC1, CC -3, CC -4 and CC -6 are located in the • hilly ridge "gap" which includes a portion of the previous potential transportation corridor. The Order 1 soil map was completed in the field on the recent (2008) photo -base map at a scale of 1 " =250 feet. Soil Map 1 includes several current project components including the "Spoil Stockpile, Facilities & Portal Area ", as well as several previous potential components including the "Waste Rock Storage Area ", the "North Site — Portal Area ", the "Middle Site — Potholes 2 & 3 Area ", and the "South Site — Potholes 4 & 5 Area ". New soil sample sites CC -2 and CC- 5 are located in the potential "Waste Rock Storage Area" which is outside of the Seneca II Mine permit area. Soil Map 2 also includes a refined Order 1 mapping of buffer areas adjacent to these components as well as the accurate depiction of all Seneca II Mine reclaimed areas in the immediate area as shown on the recent Seneca Phase III Bond Release Map (Seneca Coal Company, 2008). Map 3 of 3 was completed for "Adjacent Areas 2" which is located primarily within the Twentymile Coal Foidel Creek Mine permit area. The previous potential transportation corridor was sited across this area. The soils mapping is taken from the Order 1 -2 Foidel Creek Mine baseline soil survey and is compiled on a recent photo -base map. The previous Foidel Creek Mine soils mapping was field- checked but no additional soil sampling was necessary. 0 4