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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