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  • All fields: (OCoLC)218323881
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    • Placer mining

    • Men pose near monitor nozzles probably for a U.S. Gold Placers mining operation near the San Miguel River in Montrose County or San Miguel County, Colorado. Piles of large rocks anchor the nozzles and the water pipe that supplies the monitors.
    • Gold mining.; Hydraulic mining--1880-1890.; Miners.; Rivers.
    • [between 1880 and 1890?]

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