View of a Public Works Administration hydraulic gold placer mining class, in Denver, Colorado; shows crowds of people panning in the Platte River, water towers, and cars.
United States. Public Works Administration.--1930-1940.; Denver (Colo.)--1930-1940.; Gold mining--Colorado--Denver--1930-1940.; Hydraulic mining--Colorado--Denver--1930-1940.; Miners--Colorado--Denver--1930-1940.;...
[between 1930 and 1940?]
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