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Tri-State to Close Colowyo Mine

Summary by coalage.com
The Tri-State Generation and Transmission Association plans to permanently close the Colowyo surface mine, located near Meeker, Colo. The company has signed a contract with Kiewit Mining Group Inc., for reclamation services beginning on or around Jan. 1, 2026. Tri-State’s subsidiary, the Colowyo Coal Co., filed a WARN notice with the State of Colorado, saying the mine’s 133 employees would be laid off by the end of the year. The Colowyo mine sup…
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coalage.com broke the news in on Monday, December 1, 2025.
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