A Union Pacific Railroad train as a part of the construction for Hoover Dam. The front of the card reads: "First train in railroad pass, Boulder Dam Project, Oakes." Description given with postcard: "SP, LA & SL (UPRR) locomotive 6082 in Railroad Pass. Maybe spreading ballast on track."
Left to right shown are: Elwood Mead, Comm. Of Reclamation; Phil Swing, author of the bill, a member of House of Representatives from California; President Coolidge; U.S. senator Hiram Johnson, another author of the boulder Dam bill; Addison T. Smith, Chairman, Committee on Reclamation, House of Representatives; W.B. Matthews, General Counsel, Boulder Dam Association, Los Angeles, California. The occasion is the signing of the Boulder Dam bill, Dec. 21, 1928.