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West Elk Mine <br />Waste water from the facilities was stored in a plastic buried septic (closed) tank with an <br />approximate capacity of 10,000 gallons. This tank will be periodically pumped and the waste <br />water hauled to WEM's existing waste water treatment facility as needed. <br />Four modular bath/changing units and one modular office unit was placed at the site west of <br />Shaft #1 on the same level as shown on MCC drawing S52SGO05 and Map 54. Electrical <br />distribution panels for the facilities were housed in a skid -mounted steel enclosure. Water supply <br />equipment was housed in a second skid -mounted steel enclosure. Electrical service was supplied <br />via conductors within buried conduits. Potable water piping and waste water piping was a <br />combination of buried and surface piping. <br />Construction of the service infrastructure occurred in early May 2005. Completion of <br />construction and installation of the modular units occurred in late May 2005 when the modular <br />units were delivered. The facilities were completed the last week of May 2005 to meet MCC's <br />needs for housing additional construction and development staffing. <br />Electrical Power <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 <br />substation located within the main mine facilities was abandoned in 1998, due to landslide <br />movement, and is discussed in a later section of this permit. <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 <br />system according to Federal mine safety regulations. Raptor protection systems have also been built <br />into the electrical distribution system. Circuit breakers, lightning -protectors, and ample switching <br />points with the necessary transformers have been built into each substation. Branch -lines that lead <br />out to various loads are protected with breakers to prevent trip out of the main breaker and <br />shutdown of the entire operation if a fault occurs on a branch line. The protective breakers on the <br />branch lines are coordinated with the exception that the mine fans that are connected to the main <br />distribution line ahead of other breakers. <br />Communications <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 />2.05-22 Rev 06105, 01106, 03106, 04/06 & 05/06- PRIG, 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 <br />