2012-07-10_PERMIT FILE - C1981041A (7)

Home Browse Search

Access Road 1 will be backfilled and graded. The original road cut was below sections of nearly vertical rock faces. Fill on this road will begin near the center of the road and extend to a height of approximately 15' leaving some vertical rock faces. Care will be taken when filling this area to use the best soils for final cover. Excess material from this area will be used to construct a new access road to the upper buildings. The new road will be west of reclaimed Access Road 1. Additional material, if needed, will be hauled in from the Unit Train Loadout Area. Regrading of the lower area and the preparation plant will begin with clean -up of refuse and coal stockpiles. All exposed coal residue or coal waste will be placed in the CRDA -1. Concrete and other non -toxic material remaining after demolition of the wash plant, shop and reclaim tunnel will be utilized to construct the new access road and backfill a portion of Pond 8. Additional soils will be graded over this fill to establish the final contours shown on Exhibit 6C. Again, topsoil was not salvaged for this area, so some of the best available soil in this area will be used as the final cover. Reclamation of this area will include Haul Road 1. The 9.5' diameter conveyor culvert under this area leading under the highway was left in place. The conveyor culvert was demolished and backfilled where it emerged from the ground west of the 1 -70 frontage road. A minimum of 100 -feet of culvert was filled with soil. The 4 -inch diameter mine dewatering pipe which ran through the conveyor culvert to outfall 001 was abandoned. The drainage plan for the South Portal is shown on Exhibits 6C and 26. Run- off calculations are presented in Appendix 14 -6, pages 14 -6 -1 through 14-6 - 18xxiii. The drainage ditches will be constructed except where they cross pond 8 and pond 9. Pond 8 will receive interim run -off from ditch segments E, F and G. Pond 9 will receive interim run -off from the RSRDA upper diversion ditch, segments A, B and C, and a portion of the lower bench of the RSRDA. The ditches will temporarily discharge into the two ponds to provide sedimentation control until their removal is approved by the DMG. The ditches will be constructed through the reclaimed ponds so the final drainage configuration is complete. Ditch section H -H will be constructed in conjunction with pond removal. Demonstration that Ponds 8 and 9 are no longer necessary is presented in Appendix 14 -12 and DRMS's approval of TR -61 allows for removal of both ponds. Miscellaneous grading for the site will be at the A substation, Light Use Road 1, and the Water tank shown on Exhibit 6A, Tab Section 13. Grading of these sites will involve minor cuts and fills to blend in with adjacent surface contours. B- Substation was removed and the area graded during 2002. TR -61 14 -8 (Rev. 3/11)