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West Elk Mine <br /> <br />2.05-22 Rev. 06/05, 01/06, 03/06, 04/06 & 05/06- PR10; 01/09- MR350; 04/09- TR116; 04/09- MR353; 05/09- MR354; 08/09- TR118; <br />08/09- TR119; 09/12- MR387; 11/12- MR390; 07/18-PR15; 11/18- MR430; MR438- 09/19; MR439- 11/19; 07/20- MR447; 6/22- <br />MR464; 6/22 MR466; 6/22 MR468; 11/22 MR471; 07/23 MR474; 8/23 MR476; 09/23 MR477, 10/23 MR478, MR479, 1/24-TR152 <br />Four modular bath/changing units and one modular office unit was placed at the site west of Shaft <br />#1 on the same level as shown on MCC drawing S52SG005 and Map 54. Electrical distribution <br />panels for the facilities were housed in a skid-mounted steel enclosure. Water supply equipment <br />was housed in a second skid-mounted steel enclosure. Electrical service was supplied via <br />conductors within buried conduits. Potable water piping and waste water piping was a combination <br />of buried and surface piping. <br /> <br />Construction of the service infrastructure occurred in early May 2005. Completion of construction <br />and installation of the modular units occurred in late May 2005 when the modular units were <br />delivered. The facilities were completed the last week of May 2005 to meet MCC’s needs for <br />housing additional construction and development staffing. <br /> <br />Electrical Power <br /> <br />An overhead 115KV high voltage transmission line supplies power to the substation located in <br />Sylvester Gulch. This feed line replaces the 46KV high voltage transmission line from Colorado <br />Highway 133 to the substation located in Sylvester Gulch that was established in 1997. Distribution <br />power lines connect the substation to the two ventilation shafts, the Sylvester Gulch F Seam fan, the <br />electric borehole, mine dewatering pump station and the existing main mine facilities. The substation <br />located within the main mine facilities was abandoned in 1998, due to landslide movement, and is <br />discussed in a later section of this permit. <br /> <br />This electrical system meets the requirements of the National Electrical Safety Code, the National <br />Electric Code (NEC), the National Fire Code, MSHA, and all applicable State or local codes. <br />Grounding and ground-fault-protection systems have been built into the electrical distribution system <br />according to Federal mine safety regulations. Raptor protection systems have also been built into the <br />electrical distribution system. Circuit breakers, lightning-protectors, and ample switching points with <br />the necessary transformers have been built into each substation. Branch-lines that lead out to various <br />loads are protected with breakers to prevent trip out of the main breaker and shutdown of the entire <br />operation if a fault occurs on a branch line. The protective breakers on the branch lines are <br />coordinated with the exception that the mine fans that are connected to the main distribution line <br />ahead of other breakers. <br /> <br />Communications <br /> <br />A pager-type mine telephone system connects all working sections to the mine office. The system <br />uses the same surface corridors as the power distribution system where possible. It also has backup <br />battery powered pagers. Additionally, a two-way radio system is also used at West Elk Mine. This <br />system is used on the surface and underground. <br /> <br />Materials Storage Areas <br /> <br />Because the mine site is steeply sloped, benches have been or will be constructed and several areas <br />have been designated for the storage of materials and equipment. An access road loop was <br />constructed to create an approximately 3 2/3-acre storage bench located east of the office building <br />employee parking lot. An approximately 1/3-acre bench, referred to as the surface lay-down area,