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  • All fields: Blackhawk (Colo.)--1870-1910.
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    • Blackhawk - Iron City Stamp Mill (Int.)

    • Blackhawk - Iron City Stamp Mill (Int.)

    • mortars and amalgamated with the gold in the ore. The stamps were periodically stopped and the amalgam was retrieved and then sold to banks or the mint.; The interior of a stamp mill, possibly the Iron City Stamp Mill in Blackhawk, Colorado, shows...

    • Ore-dressing plants--Colorado--Blackhawk--1870-1910.; Ore-dressing--Colorado--Blackhawk--1870-1910.; Blackhawk (Colo.)--1870-1910.; Gilpin County (Colo.)--1870-1910.; Gold mining--Colorado--Blackhawk--1870-1910.

    • [between 1935 and 1950?]
    • Blackhawk - Iron City Stamp Mill

    • Blackhawk - Iron City Stamp Mill

    • Several unidentified men stand outside the Iron City Stamp Mill in Blackhawk, a mining town in Gilpin County, Colorado. The tracks of the Gilpin Tramway, which was used to haul ore from nearby mines to the depot in Blackhawk, cross the foreground....

    • Mine railroads--Cars--Colorado--Blackhawk--1870-1910.; Ore-dressing plants--Colorado--Blackhawk--1870-1910.; Ores--Transportation--Colorado--Blackhawk--1870-1910.; Blackhawk (Colo.)--1870-1910.; Gilpin County (Colo.)--1870-1910.; Carriages &...

    • [between 1935 and 1950?]

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