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  • All fields: U.S.B.R
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    • West portal Continental Divide Tunnel

    • View of the entrance to the west portal of the Alva B. Adams Tunnel of the United States Reclamation Bureau Colorado Big Thompson Project water diversion tunnel in Grand County County, Colorado. A sign reads: "West Portal Continental Divide Tunnel,...
    • Colorado-Big Thompson Project (U.S.)--1940-1950.; Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Tunnels--Colorado--Grand County--1940-1950.
    • [between 1940 and 1947]
    • Alva B. Adams Tunnel

    • View of the West Portal of the Continental Divide Tunnel (Alva Adams Tunnel), a part of the Colorado-Big Thompson Project, during construction on the east end of Grand Lake in Grand County, Colorado. The work was undertaken by the United States...
    • United States. Bureau of Reclamation--Facilities.; Water diversion--Colorado--Grand County--1930-1940.; Water tunnels--Colorado--Grand County--1930-1940.; Alva B. Adams Tunnel (Colo.)--1930-1940.; Grand County (Colo.)--1930-1940.;...
    • [between 1939 and 1940?]

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