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  • All fields: Keystone Mine (San Miguel County, Colo.)--1880-1900.
(6 results)



Display: 50

    • Keystone Placer Mine. Giant at work.

    • Keystone Placer Mine. Giant at work.

    • View of a placer mining operation at Keystone Placer Mine, San Miguel County, Colorado; shows a monitor nozzle and a water pipe.

    • Keystone Mine (San Miguel County, Colo.)--1880-1900.; San Miguel County (Colo.)--1880-1900.; Hydraulic mining--Colorado--San Miguel County--1880-1900.; Mining--Colorado--San Miguel County--1880-1900.; Penstocks--Colorado--San Miguel...

    • [between 1882 and 1900?]
    • Keystone Placer Mine. Sluice boxes

    • 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

    • 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

    • 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?]
    • Keystone Placer Mine near Telluride the giant at work

    • Keystone Placer Mine near Telluride the giant at work

    • A miner uses a monitor nozzle at the Keystone Placer Mine near Telluride in San Miguel County, Colorado. A large pipe is nearby.

    • Keystone Mine (San Miguel County, Colo.)--1880-1900.; Telluride (Colo.)--1880-1900.; Hydraulic mining--Colorado--Telluride--1880-1900.; Miners--Colorado--Telluride--1880-1900.; Mining--Colorado--Telluride--1880-1900.

    • [between 1882 and 1900?]
    • [K]eystone Placer Mine giant at work

    • [K]eystone Placer Mine giant at work

    • View of the Keystone Placer Mine near Telluride (San Miguel County), Colorado. Pipes, a sluice, and wooden staircase are nearby.

    • Keystone Mine (San Miguel County, Colo.)--1880-1900.; Telluride (Colo.)--1880-1900.; Hydraulic mining--Colorado--Telluride--1880-1900.; Miners--Colorado--Telluride--1880-1900.; Mining--Colorado--Telluride--1880-1900.

    • [between 1882 and 1900?]

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