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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, 3/24 MR480, <br />05/24 MR-481 <br />Potable water was supplied using a 10,000 gallon surface tank and pressure pump system. This <br />tank was filled with potable water from WEM’s existing potable water treatment and storage <br />system via truck haul to Sylvester Gulch. <br /> <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 /> <br />Four modular bath/changing units and one modular office unit w as placed at the site west of <br />Shaft #1 on the same level as shown on MCC drawing S52SG005 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 /> <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 /> <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 <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 /> <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 /> <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