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Wes( E!k Mine <br />• Access Control <br />Access to the West Elk Mine is controlled with electronic security gates at the lab entrance (to the <br />silo pad and pond MB-2R) and the main mine site entrance off State Highway 133. To enter into <br />the mine site, the gates will be controlled by an electronic cazd reader. To exit the mine site, an <br />electronic "exit loop" will activate the gates. A phone will be installed at the main mine site gate <br />for visitors. Locked manual gates control other entrances to the disturbed azea (i.e. Lone Pine <br />Gulch, the North Soil Storage Area, and the Refuse Pile Expansion). Security monitoring of the <br />mine area occurs as necessary. <br />In addition to fences and security monitoring, signs aze used to control access to the permit area and <br />facilities within the area. Signs identifying the mine area are displayed at all points of access from <br />public roads and highways. These signs show the name, business address, and telephone number of <br />the Permittee and identification numbers of current mining and reclamation permits or other <br />authorizations to operate. Petmit boundary signs are also present along the entire perimeter of the <br />disturbed mine site. Topsoil stockpiles, subsoil stockpiles, and the refuse area aze clearly mazked <br />with material identificationsigns. <br />Soil Stockpiles <br />As the West Elk Mine is an underground mine and most of the reclamation will not begin until <br />the end of the life of the mine, it is necessary to have subsoil and topsoil stockpiles. The main <br />topsoil pile is located to the south of the run-of--mine coal stackpad and will be used for <br />reclamation of the main mine facilities area. Some subsoil from the subsoil pile in Sylvester <br />Gulch, (Live Subsoil Pile #1) as well as the topsoil from the stockpile at the North Soil Storage <br />Area (NSSA), will be used for reclamation of the Lower Refuse Pile. MCC has also stockpiled <br />topsoil from the Refuse Pile Expansion (RPE) area and the widening of the mine entrance at the <br />NSSA on the north side of Highway 133. <br />Landslide Corrective Measures <br />In 1997 and 1998, MCC employed several corrective measures to stabilize the landslide at the <br />main mine facilities area, as surges of movement had been experienced in 1996 and 1997. The <br />corrective measures included the installation of rock buttresses, stone columns, horizontal <br />drains, pins (micro-piles), and the expansion of the roller compacted (RCC) buttress. These <br />structures are described in detail, and their effectiveness in improving the stability of the <br />facilities area is discussed in Exhibit 14C, 1998 Landslide Corrective Measures Report by Barr <br />Engineering/Harding Lawson Associates. The purpose of the corrective measures was to <br />prevent catastrophic failure, which MCC was successful in doing. MCC will continue to <br />evaluate the effectiveness of the corrective measures over time to evaluate their effectiveness <br />for the long term (i.e. post-reclamation). MCC is collecting water level data and movement <br />data from various piezometers, inclinometers, and survey mirrors around the mine site on a <br />scheduled interval. Based on the data collected MCC will reevaluate the slope stability <br /> <br />2. ~5-27 Revised Jan (996 R.Np3. Revised Nov. / 996 PR07; Revised Jan. 199 i TR79; Revised Ju(. 1997 TR81 <br />Revised Oci. 1998 TR86 <br />