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  • All fields: ZZR710062698
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    • Colorado coal mining

    • View of what appears to be an abandoned sluice; possibly from a coal mine operated by the Rocky Mountain Fuel Company, Colorado.
    • Rocky Mountain Fuel Company--Facilities--1920-1940.; Abandoned mines--Colorado--1920-1940.; Coal mining--Colorado--1920-1940.; Mining--Colorado--1920-1940.
    • [between 1920 and 1940?]

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