Black and white image of Dr. Ray Lyman Wilbur, Secretary of Interior, naming the Boulder Dam (name officially changed to Hoover Dam in 1947) at a ceremony celebrating the beginning of work on the Boulder Canyon Project and the beginning of the construction of Union Pacific Railroad from Boulder Junction (Bracken Junction) to the dam site.

Black and white image showing a portion of Boulder City from Water Tank Hill. This photo is significant because it shows the Babcock & Wilcox Company housed under construction in the middle distance.

Black and white image of Lake Mead, including boat docks and a bathing beach developed by the National Park Service for recreational use, such as swimming and picnicking.

Black and white image of "Big Bertha," the Six Companies, Inc. motor transport used to haul workmen between Boulder City and Hoover Dam. This double-decker truck could haul 154 men. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Black and white image of a man and a car near a Deputy United States Marshal sign at the entrance to the Boulder Canyon Project Federal Reservation in Nevada.

Snow or sand covering a house, automobiles and mining buildings in Moapa, Nevada. Photograph has caption "Silica Sand Moapa."

Exterior of the Flamingo Hotel, showing cars in the parking lot and the "Champagne Tower." The marquee features Vic Damone and Della Reese.