Black and white image of three employees from the Stenographic Office at the Bureau of Reclamation with the following printed description: "Left to right: Hannah Houn, Stenographer; Cecile M. Dotson, Mails and File Clerk; Rose V. Crippa, Stenographer."

Black and white image of fire fighters with the following printed description: "Government fire fighting equipment, Boulder City. The driver of the truck is Robert Hewes in charge of fire detail."

Black and white image of Herbert Hoover and several others touring the Boulder Canyon Project. The following printed description accompanies the image: "President Herbert Hoover and official party in Tunnel No. 2 during inspection tour of Boulder Canyon Project. Left to right: Construction Engineer W. R. Young, Bureau of Reclamation; Mr. Ritchey , Secretary to the President; Chief Engineer R. F. Walter, Bureau of Reclamation; Mrs. Hoover; President Hoover; Mrs. Wilbur; Secretary of the Interior R. L. Wilbur; E. O. Wattis, First Vice-President, Six Companies, Inc.; F. T. Crowe, Gen. Superintendent, Six Companies , Inc." Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Black and white image of President Herbert Hoover and official party during an inspection tour of the Boulder Canyon Project. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Black and white image of the Boulder Canyon Dam "C" site. Written on the image are the dimensions of the canyon. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Black and white image with the following printed description: "Fortification Hill as seen from the Nevada shore of Black Canyon Reservoir."

Black and white image of Hoover Dam with the following printed description: "Looking upstream through Nevada spillway. Overflow weir under construction at right, completed section of channel lining and parapet at left." Note: Boulder Dam was officially renamed Hoover Dam in 1947.