Colowyo Coal Company

The Colowyo Coal Company is a wholly owned subsidiary of Rio Tinto which owns the Colowyo Mine in Colorado.

In its 2009 annual report Rio Tinto states that the "Colowyo Coal Company produces thermal coal in north west Colorado. The company intends to fulfil long term contracts with two power generators located in north west Colorado until 2017, with the intention to cease production in 2018."

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