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Coal Mining in Colorado

Added by yongli on 02/16/2021 - 13:06, last changed on 04/15/2022 - 10:14
In the late nineteenth and early twentieth centuries, coal mining was the most important industry in Colorado. Coal mines served as the crucibles of empire, churning out the fuel needed to power the railroads, precious-metal mines, and smelters that helped develop the region. They were also...
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