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Coal mining in Colorado : ウィキペディア英語版 | Coal mining in Colorado Early coal mining in Colorado, a state of the United States was spread across the state. Some early coal mining areas are currently inactive, including the Denver Basin and Raton Basin coal fields along the Front Range. There are currently 11 active coal mines, all in western Colorado. ==History== Coal mining in Colorado dates back to 1859, when a pair of men began mining a coal deposit between the gold rush settlements of Denver and Boulder.〔"A tour through the mining district-Arapahoe-incidents on the road-coal mines-Boulder City," ''Rocky Mountain News'', 6 October 1859, p.2.〕
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「Coal mining in Colorado」の詳細全文を読む
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