Bureau of Reclamation

President Harry S. Truman (left) and Congressman Mike Mansfield on the rear platform of the President's train after it arrived in Columbia Falls, Montana. President Truman was on a railroad campaign trip through the western United States.

Left to right: C. H. Spencer, Hungry Horse Dam construction engineer; Margaret Truman; President Harry S. Truman; and Congressman Mike Mansfield at the Hungry Horse Dam project outside Kalispell, Montana during a stop on President Truman's Western campaign trip.

Left to right: C. H. Spencer, Hungry Horse Dam construction engineer; President Harry S. Truman; and Ohio Congressman Michael J. Kirwan tour the Hungry Horse Dam outside Kalispell, Montana during a stop on President Truman's Western campaign trip. President Truman is holding a hard hat with a "hungry horse" mascot painted on the side and his name on the front.

A crowd of unidentified people gathers at the train depot in Columbia Falls, Montana to hear President Harry S. Truman speak during a stop on his campaign trip through the western United States. Pictured: President Truman (top right corner, underneath second from right window of train car).

A committee of unidentified people greet Secretary of the Interior Oscar Chapman (fifth from left) and Ann (Mrs. Oscar) Chapman (third from right) at the train station in Denver, Colorado as they arrive for "Welcome Home Oscar!" Day. All others unidentified.

View of the first water flowing through the East Portal of the Alva B. Adams Tunnel into the reservoir. Under Secretary of the Interior Oscar Chapman attended the dedication ceremony.

From left to right: Bureau of Reclamation Commissioner Michael Straus; Under Secretary of the Interior Oscar Chapman; Elizabeth (Mrs. Alva B.) Adams; Alva B. Adams, Jr.; and J. M. Dille, Secretary-Manager, Northern Colorado Water Conservancy District have a conversation near the East Portal of the Alva B. Adams Tunnel in Colorado after its dedication ceremony. All others unidentified.

View of the first water coming through the East Portal of the Alva B. Adams Tunnel in Colorado. Under Secretary of the Interior Oscar Chapman attended the dedication ceremony.

View of the crowd gathered around the empty reservoir of the Alva B. Adams Tunnel in Colorado during the dedication ceremony. All people unidentified.

Governor of Colorado Lee Knous (left) pushes the button to open the Alva B. Adams Tunnel for the first flow of water from Western Colorado to Eastern Colorado. Bureau of Reclamation engineer George Highley is at right. All others unidentified.