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  • All fields: F14570
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    • Alma Gold Mining Co.

    • Alma Gold Mining Company hydraulic placer dredge, Park County, Colorado shows tailings, settling pond and backhoe with Mosquito Range in background.
    • Alma Gold Mining Company (Colo.)--1930-1940.; Dredges--Colorado--Park County--1930-1940.; Gold dredging--Colorado--Park County--1930-1940.; Park County (Colo.)--1930-1940.; Hydraulic mining--Colorado--Park County--1930-1940.; Mining--Colorado--Park...
    • February 24, 1936

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