Cabinet officers

From left to right: Bureau of Reclamation Commissioner Michael Straus; Lee Knous, Governor of Colorado; and Under Secretary of the Interior Oscar Chapman at the dedication of the Alva B. Adams Tunnel in Colorado.

Under Secretary of the Interior Oscar Chapman (facing camera, left) and Bureau of Reclamation Commissioner Michael Straus (facing camera, right) address the crowd at the dedication of the Alva B. Adams Tunnel in Colorado. All others unidentified.

Under Secretary of the Interior Oscar Chapman (second from left) with unidentified men at the Oil Shale Demonstration Plant dedication in Anvil Points, Colorado.

Governor of Colorado Lee Knous (left) and Under Secretary of the Interior Oscar Chapman at the dedication of the Alva B. Adams Tunnel in Colorado.

Secretary of the Interior Julius Krug (standing) speaks during his induction ceremony in the Department of the Interior auditorium. Seated on stage, left to right: unidentified; Assistant Secretary of the Interior Oscar Chapman; unidentified; Margaret (Mrs. Julius) Krug; unidentified; Senator Joseph C. O'Mahoney; Ann (Mrs. Oscar) Chapman; unidentified; unidentified. All others unidentified.

Oscar Chapman (left) is sworn in as Under Secretary of the Interior as Secretary of the Interior Julius Krug (center) looks on. Man on right is unidentified.

Mrs. Elizabeth Adams (standing) speaks at a reception at Crags Hotel, Estes Park, Colorado after the dedication of the Alva B. Adams Tunnel. Also pictured: Under Secretary of the Interior Oscar Chapman (left); and Alva B. Adams, Jr. (right, back to camera). All others unidentified.

Under Secretary of the Interior Oscar Chapman (second from right) with unidentified people at the dedication of the Alva B. Adams Tunnel in Colorado.

Under Secretary of the Interior Oscar Chapman (right) with unidentified men at the dedication of the Alva B. Adams Tunnel in Colorado.

Assistant Secretary of the Interior Oscar Chapman with his son, James Chapman, before James gets his first haircut.