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West Elk Mine Access control and security at West Elk Mine consists of fences, security monitoring, and signs. Signs identifying the mine azea are displayed at all points of access from public roads and highways. These signs show the name, business address, and telephone number of the Permitee and identification numbers of current mining and reclamation permits or other authorizations to operate. Permit boundary signs aze also present along the entire perimeter of the disturbed mine site. Topsoil stockpiles, subsoil stockpiles, and the refuse azea are clearly mazked with material identification signs. As West Elk Mine is an underground mine and most of the reclamation will not begin until the end of the life of the mine, it is necessary to have subsoil and topsoil stockpiles. The main topsoil pile is located to the south of the run-of--mine coal stack-pad and will be used for reclamation of the main mine facilities azea. Some subsoil from the subsoil pile in Sylvester Gulch, (Live Subsoil Pile #1) as well as the topsoil from the stockpile at the North Soil Storage Area (NSSA), will be used for reclamation of the Lower Refuse Pile. MCC has also stockpiled topsoil from the Refuse Pile Expansion (RPE) azea and the widening of the mine entrance at the NSSA on the north side of Highway 133. Landslide Corrective Measures In 1997 and 1998, MCC employed several corrective measures to stabilize the landslide at the main mine facilities azea, as surges of movement had been experienced in 1996 and 1997. The corrective measures included the installation of rock buttresses, stone columns, horizontal drains, pins (micro-piles), and the expansion of the roller compacted (RCC) buttress. These structures • are described in detail, and their effectiveness in improving the stability of the facilities area is discussed in Exhibit 14C, 1998 Landslide Corrective Measures Report by Barr Engineering/Hazding Lawson Associates. The purpose of the corrective measures was to prevent catastrophic failure, which MCC was successful in doing. MCC will continue to evaluate the effectiveness of the corrective measures over time to evaluate their effectiveness for the long term (i.e. post-reclamation). MCC is collecting water level data and movement data from various piezometers, inclinometers, and survey mirrors azound the mine site on a scheduled interval. Based on the data collected, MCC will reevaluate the slope stability analyses after spring runoff each yeaz and where appropriate, update Exhibit 14C. The update will include an evaluation of the relative change in the factor of safety during the previous year and since the installation of the corrective measures in 1998. A revision including the updated information will be provided to the CDMG by July 30a' of each year. (4) Ponds, Impoundments, and Diversions During the course of construction and operation of the mine facilities at West Elk Mine, every effort is made to minimize water pollution. It is MCC's intent to dischazge water from sediment ponds, Small Area Exemptions, and from the mine in compliance with all applicable effluent limitations. To fulfill this commitment, all surface drainage from the affected mine azea is collected and treated prior to being discharged from the pemut azea. All surface runoff from undisturbed areas is directed away from the affected mine azea through diversion channels. Maps 54, 54A, and 54B show the distribufion of sediment control structures at West Elk Mine. Map 54 and Map 54A identify the sub-watershed drainage basins, tributary drainage basin information, and ditch/culvert layouts in conjunction with the main surface facilities azea and Lone Pine Gulch, respectively. Maps lE, 2E 2.05-15 Revised June 1005 PRI G