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  • All fields: prongs
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    • Iron pronged fence and wall

    • Pointed prongs top this fence at the State Penitentiary in Canon City, Colorado. The sharp tips of the uprights alternately curve out to both sides. A cement wall with barred windows is in the background.
    • Canon City (Colo.)--1930-1940.; Fences--Colorado--Canon City--1930-1940.; Prisons--Colorado--Canon City--1930-1940.; Colorado State Penitentiary.
    • 1937
    • EPCD, blacksmith shop

    • Interior view of a machine shop near the East Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Larimer County, Colorado. Men pose next to machinery, tools, prongs and an anvil.
    • Alva B. Adams Tunnel (Colo.)--1940-1950.; Larimer County (Colo.)--1940-1950.; Employees--Colorado--Larimer County--1940-1950.; Interiors--Colorado--Larimer County--1940-1950.; Machine shops--Colorado--Larimer County--1940-1950.;...
    • [between 1940 and 1950?]

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