2011-06-20_PERMIT FILE - C1981041A (3)

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Roadside North Portal Final contours for the Roadside North Portal area are shown on Exhibit 8C. Cross-sections representing the existing and final grade are shown on Exhibit 27. These final contours closely resemble the original contours, see Exhibit 8D for the pre-mining contours. During 2002 this area was regraded to approximate original contour. Backfill material came from areas filled near Coal Creek and around the stockpile area. There was no coal remaining in the stockpile. Dirt and rock placed in the decline was spread in approximately 2-4' lifts in such a way as to minimize voids in the fill. There was no specific compaction requirements. Lifts were basically spread in horizontal layers and hauling equipment was routed over the fill to provide compaction. The small amount of settling that will take place with this fill technique will have little affect on the final contours and drainage. Concrete and other material left after demolition of the facilities was placed in the fill material. Topsoil piles 1 and 3 were distributed over the regraded site. The sediment pond shown on Exhibit 8B is utilized for sediment control at the North portal. A grass filter design is presented in Appendix 14-6 beginning on page 147. The grass filter design demonstrates the silt fence, previously shown on 813, is no longer required. The pond will remain in place until its removal is approved by the DRMS. At that time, the pond will be backfilled and the berms rounded or removed. The upper diversion ditch will be reclaimed after the sediment pond is removed and the channels shown on Exhibit 8C will be installed to accommodate storm runoff from the primary drainage chutes originating on the steep slopes above the disturbed area. The design of the channels is presented in Appendix 14-6. The channels will be constructed at least 3-years before final Phase 3 bond release at the North Portal. Cameo Refuse Disposal Area Nos. 1 and 2 Reclamation of the remaining benches and the top of the Cameo Refuse Disposal Areas (CRDA) was performed as discussed in section (a) of this Tab Section. The final contours for these sites are shown on Exhibit 9C, this section and Exhibits 51, 52 and 60 located in Tab Section 13. Cross- sections representing the existing and final grade are shown on Exhibits 18 and 53, Tab Section 13. These contours reflect a design final configuration rather than AOC. Design for the slopes and benches is given in Tab Section 13 along with Exhibits 18 and 51 through 53 and 60. 14-10 (Rev.11 /08)