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  • All fields: Flumes--Colorado--San Miguel County--1880-1900.
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    • Keystone Placer Mine. Sluice boxes

    • View of the Keystone placer mine, shows frame mine buildings and a wooden sluice, San Miguel County, Colorado.
    • Keystone Mine (San Miguel County, Colo.)--1880-1900.; San Miguel County (Colo.)--1880-1900.; Flumes--Colorado--San Miguel County--1880-1900.; Hydraulic mining--Colorado--San Miguel County--1880-1900.; Mine buildings--Colorado--San Miguel...
    • [between 1882 and 1900?]
    • Keystone Placer Mine, sluice boxes

    • View of the Keystone Placer Mine in San Miguel County Colorado. Shows mining buildings and sluice apparatus.
    • Keystone Mine (San Miguel County, Colo.)--1880-1900.; San Miguel County (Colo.)--1880-1900.; Flumes--Colorado--San Miguel County--1880-1900.; Hydraulic mining--Colorado--San Miguel County--1880-1900.; Mine buildings--Colorado--San Miguel...
    • [between 1882 and 1900?]
    • Keystone placer mine giant at work

    • View of mining operations at the Keystone Mine in San Miguel County, Colorado. Shows sluice boxes and a large pipe with hydraulic nozzles.
    • Keystone Mine (San Miguel County, Colo.)--1880-1900.; San Miguel County (Colo.)--1880-1900.; Flumes--Colorado--San Miguel County--1880-1900.; Hydraulic mining--Colorado--San Miguel County--1880-1900.; Mining--Colorado--San Miguel County--1880-1900.
    • [between 1882 and 1900?]
    • Twin falls, near Ames

    • View of waterfalls near Ames (San Miguel County), Colorado. One waterfall is from a wood flume, the other is from an unidentified stream.
    • San Miguel County (Colo.)--1880-1900.; Flumes--Colorado--San Miguel County--1880-1900.; Waterfalls--Colorado--San Miguel County--1880-1900.
    • [between 1882 and 1900?]

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