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The North Antelope Rochelle Mine is the largest coal mine in the U.S. Located in Campbell County, Wyoming, about 65 miles south of Gillette, it produced 110.9 million tons of coal in 2013.〔(【引用サイトリンク】 title=North Antelope Rochelle Mine )〕〔(【引用サイトリンク】 title=Table 9. Major U.S. coal mines, 2013 )〕 Peabody Energy opened the North Antelope mine in the heart of Wyoming's Powder River Basin in 1983.〔(【引用サイトリンク】 title=Celebrating 125+ Years )〕 The Rochelle mine was opened in 1984. They were combined in 1999, making the largest coal mine in the United States. A contender for the title of largest mine emerged in 2009 when Arch Coal, the owner of the Black Thunder Coal Mine bought the Jacobs Ranch Mine. These two operations merged and North Antelope Rochelle ceded the title of largest mine to Black thunder in 2012.〔(【引用サイトリンク】 title=Black Thunder Thermal Coal Mine )〕〔(【引用サイトリンク】 title=Black Thunder )〕 North Antelope Rochelle is a surface mine. Draglines and trucks and shovels are used to remove the overburden. Trucks then haul the coal from the three pits to trains for shipment to customers. North Antelope Rochelle employed 1,365 people in 2011.〔(【引用サイトリンク】 title=Concise Guide / 2011 Wyoming Coal Production by County (p. 7) )〕 The Powder River Basin of Wyoming and Montana is the largest low-sulfur coal source in the nation. Eight of the ten largest mines in the United States are located in the basin. Annual Production at North Antelope Rochelle was 107.7 million tons in 2012, 109.0 million tons in 2011, and 105.8 million tons in 2010. Recoverable Reserves are 1,245 million tons. The average quality of the coal shipped from the mine is 8,800 BTU/lb, 0.2% sulfur, 4.40% ash, and 1.70% sodium (of the ash), making North Antelope Rochelle coal the cleanest in the United States.〔(【引用サイトリンク】 title=North Antelope Rochelle Mine )〕〔(【引用サイトリンク】 title=North Antelope/Rochelle Mine )〕 In 2012 the mine won an award from the Department of the Interior for its reclamation efforts over the life of the mine.〔(【引用サイトリンク】 title=2012 Excellence in Surface Coal Mining National Award Winner )〕 ==References== Notes 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「North Antelope Rochelle Mine」の詳細全文を読む スポンサード リンク
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