Jul 03, 2015· Proposed coal mines. For more details, see Proposed coal mines.. Chuitna River mine, Alaska.; Red Cliff Mine, Colorado); Sage Creek Mine, Colorado Peabody Energy and Twentymile Coal Company hope to begin construction on the new underground Sage Creek Mine in West Routt County, CO as early as 2010. Bear Run Mine, Indiana Peabody Energy plans to open Bear Run Mine south .
Existing Coal Mines SourceWatch
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