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  • All fields: Mining--Colorado--Ophir--1900-1910.
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    • Impounding dams on Gold Run Placer

    • Impounding dams on Gold Run Placer

    • View of the Gold Run Placer dams on Waterfall Creek near Ophir (San Miguel County), Colorado.

    • Gold Run Placer (San Miguel County, Colo.)--1900-1910.; Ophir (Colo.)--1900-1910.; Waterfall Creek (San Miguel County, Colo.)--1900-1910.; Dams--Colorado--Ophir--1900-1910.; Gold mining--Colorado--Ophir--1900-1910.; Hydraulic...

    • [between 1934 and 1941]

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