2009-05-12_PERMIT FILE - C1980007A (11)

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West Elk Mine This electrical system meets the requirements of the National Electrical Safety Code, the National Electric Code (NEC), the National Fire Code, MSHA, and all applicable State or local codes. Grounding and ground-fault-protection systems have been built into the electrical distribution system according to Federal mine safety regulations. Raptor protection systems have also been built into the electrical distribution system. Circuit breakers, lightning-protectors, and ample switching points with the necessary transformers have been built into each substation. Branch- lines that lead out to various loads are protected with breakers to prevent trip out of the main breaker and shutdown of the entire operation if a fault occurs on a branch line. The protective breakers on the branch lines are coordinated with the exception that the mine fans are to be connected to the main distribution line ahead of other breakers. Communications A pager-type mine telephone system connects all working sections to the mine office. The system uses the same surface corridors as the power distribution system where possible. It also has backup battery powered pagers. Additionally, atwo-way radio system is also used at West Elk Mine. This system is used on the surface and underground. Materials Storage Areas Because the mine site is steeply sloped, benches have been or will be constructed and several areas have been designated for the storage of materials and equipment. An access road loop will be constructed to create an approximately 3 2/3-acre storage bench located east of the office building employee parking lot. An approximately 1/3-acre bench, referred to as the surface lay-down area, was constructed between sediment pond MB-1 and the fresh water pond. The upper and lower portal benches and the old Bear Mine site are also designated for the storage of materials and equipment. Other areas, including near the warehouse, maintenance shop, surface shop, materials storage bench building, water treatment plant and along mine site roadways, and the surface of the Lower Refuse Pile may also be utilized as needed for materials and equipment storage. Parking Facilities Employee and visitor parking facilities are provided on the bench above the office/bathhouse building. Because the area available for parking is limited, MCC encourages employees to use a park-and-ride system and car-pool. Parking facilities are designed to use the available space as efficiently as possible. Weather Station MCC's weather station is located north of the intersection of the main mine haul/access road and the middle haul/access road. The weather station consists of a set of sensors mounted on a ten- meter tower, and a precipitation gauge with awind-screen mounted near the ground. The 2.05-24 Revised June 2005 PR/0; Rev. January 2006; Rev. March 2006; Rev. Apri! 1006 PRIO. May 2006 PR10; Rev. January 2009 MR-350