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  • All fields: Hydraulic mining--Colorado--Summit County--1880-1890.
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    • Gold Pan pit showing timbering

    • Evans Gold Pan placer mine, in Summit County, Colorado, is an open pit with timbering, a hydraulic elevator platform, stacker, processing sheds, and tailing piles. Miners work with a crane and jets of water by cribs at the bottom.
    • Tailings embankments--Colorado--Summit County--1880-1890.; Summit County (Colo.)--1880-1890.; Gold mining--Colorado--Summit County--1880-1890.; Hoisting machinery--Colorado--Summit County--1880-1890.; Hydraulic mining--Colorado--Summit...
    • [between 1880 and 1890?]
    • Testing gravel before building a dredge

    • A miner stands next to a churn drill; a cable rig used for sampling placer gravel, Summit County, Colorado.
    • Summit County (Colo.)--1880-1890.; Drilling & boring machinery--Colorado--Summit County--1880-1890.; Hydraulic mining--Colorado--Summit County--1880-1890.; Mining--Colorado--Summit County--1880-1890.
    • [between 1880 and 1890?]

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