January 20, 2013
Twentymile Mine operates 24 hours per day, 361 days each year about 15 miles southeast of Steamboat Springs.
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Most never will go 1,500 feet underground and tour Colorado’s most productive coal mine, located just 15 miles southwest of Steamboat Springs. For that matter, most of the 20,000-plus people who call Routt County home probably give little thought to the mine or its local significance.