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2.05.3 <br /> Hubbard Creek Shaft <br /> See Map 39 for the location of the ventilation shaft that was constructed during 2007 and <br /> 2008. It is lined with steel and has a finished diameter of 10.5 feet. The steel liner was <br /> cemented in place. Prior to drilling, the perimeter of the shaft was grouted to minimize <br /> water infiltration. Grouting was extensive in the collar area and was reduced when the <br /> shaft alignment encountered solid rock. The shaft was blind bored the entire depth of <br /> approximately 500 feet. The cuttings removed from the shaft are considered <br /> underground development waste and were therefore hauled to one of the approved gob <br /> disposal areas. The Hubbard Creek shaft has been backfilled and capped. <br /> Emergency Escape System <br /> During 2009 the Operator installed an emergency escape system over the Hubbard <br /> Creek Shaft. The hoist is 20-feet long, 8-feet wide and 9-feet tall. The hoist <br /> foundation consists of six 5.5' X 5.5' 16"thick spread footings with 4-foot tall 18-inch <br /> diameter piers. The head frame has a 20-foot square base, is 3-feet by 12-feet at the <br /> top and is 27-feet tall. The head frame will be bolted to the existing shaft collar. The <br /> emergency escape system has been removed. <br /> Filter Building <br /> A pre-engineered metal building designed to house a filter system to clear the water <br /> obtained from the Deer Trail Ditch. The filter building is adjacent to the pump house <br /> which is located along the Deer Trail Ditch. The building is approximately 40 feet by 16 <br /> feet with an 8-foot eave height. <br /> Mine Entrance Gate <br /> An automatic gate installed at the main mine entrance off of Bowie Road. A 40 foot wide <br /> by 6 foot high aluminum enclosed double track cantilever slide gate with 2"X 4"frame <br /> filled with 9 gage chain link wire complete with gate opener and key pads. <br /> Methane Flare <br /> MR-200 approved a methane flare project. The project is located above the utility bench <br /> where four utility holes approved by MR-133 were drilled. Coal mine methane will be <br /> extracted from the Bowie #2 mine from an existing borehole using a vacuum pump <br /> powered by a 20 HP electric motor. The gas will pass through a water separator before <br /> being piped to an enclosed vertical oxidizer where the methane gas (CH4) will be <br /> converted to Carbon Dioxide (CO2). The system will be operated and monitored <br /> automatically by a computer.The system will be connected to the internet from a satellite <br /> link and cell phone connection and powered by a 36 KW diesel generator with a 200 <br /> gallon fuel tank. There will be no adverse impacts to adjacent land owners. Coal mine <br /> methane will be converted to CO2 and water vapor. Map-44, Methane Flare, shows an <br /> example stationary enclosed flare layout and the proposed layout at the mine. The <br /> oxidizer will be set on a concrete foundation and the site will be fenced. <br /> Oxbow Mining, LLC will supply, construct, install and operator the methane flare. Oxbow <br /> estimates the flare could be productive for 8 to 10 years. <br /> MR-200 2.05-21 - 05/19 <br />