The Six Companies, Inc. Hoover Dam Photograph Collection (1931-1935), consists of approximately 400 black-and-white photographic prints contained in two photograph albums and an additional twenty-one loose black-and-white photographic prints with ten corresponding photographic negatives.
Pinhole view of the Hoover Dam area looking west. The U.S. Construction Railroad and the Black Canyon highway is depicted in the foreground of the photograph.