Men load rubble onto ore cars in a tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado.
Date
[between 1940 and 1950?]
Notes
Accession number: 88.442.101; History Colorado.; Title penciled on negative sleeve with: "1813" and "safety film."; R7200055489