2022-11-07_GENERAL DOCUMENTS - C1981041

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a Phase I bond release including the sideslopes of the Roadside South Refuse Disposal Area, RSRDA Borrow Area, and upper diversion ditches. Within PR-3, SCC identified a material deficit for construction of Access Road I-A and elimination of the highwall at the South Portal area. Material to compensate for the projected deficit would be obtained from a low hill located within the Unit Train Loadout (UTL) disturbed area. Borrow of the material from the UTL site would remove the crown of the hill, lowering the hill by approximately 10 feet. This proposed minor reduction in the elevation of the hill is depicted on revised Exhibit I IC (Unit Train Loadout Facility Post Mining Topography). The modification does not significantly change the nature of the postmining landscape, and the amended topography will achieve approximate original contour in the UTL area. The North Decline was backfilled and graded in the spring of 1992. Material that had been piled above the portal area was dozed into the decline. A fair approximation of extrapolated original contours was achieved. The North Decline had been constructed prior to the Act so accurate records of pre-mine contours do not exist. The final reclaimed contours blend with landforms observed in the undisturbed surrounding landscape. The drainage channel of the unnamed drainage was reestablished through the regraded area and riprapped with 12-inch or greater riprap on the 7.5 percent slope areas and 6 inches or greater on the 2.5 percent grades. Some minor settling of the fill has occurred above the portal location since the initial backfilling and grading occurred, and some remedial grading has been performed to fill in settling cracks and ensure proper functioning of the sediment control system. Remaining backfilling and grading work is limited to removal of temporary drainage control structures, and provision of berm breaks along the permanent channel berms to allow reclaimed area runoff to enter the channel. The North Portal facilities area was fully reclaimed in 2002, with the exception of temporary drainage control facilities, an electrical substation and power line, and portions of two topsoil stockpiles. In 2012 final reclamation was completed at the North Portal and along the Coal Creek and Coal Gulch drainages. Ponds 6, 10,11 and 13 were reclaimed along with other drainage control features at CRDA#1 &92, CBA 91 & 92. At the North Portal the upper diversion was approved for retention as a permanent post-mine feature along with several smaller ephemeral drainage channels constructed across the reclaimed surface of the North Portal in place of the temporary drainage control features. Between 2000 and 2003 several other disturbed areas were fully reclaimed, including the 2 West Portals, South Fan, "B" Substation,the maj or portion of refuse area CRDA- 1, entirety of CRDA-2, the CBA-1 and RSRDA Soil Borrow Areas, and northern segment of the overland conveyor corridor. Soil Borrow Area CBA-2 was fully excavated and interim reclamation was completed. Final grading of CBA-2 will occur in conjunction with removal of Sediment Pond 11. Interim reclamation of the Coal Creek permanent diversion channel between the upper dip section culverts and the large double culverts beneath Haul Road 4 was completed in 2002. 46