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."

From the Elizabeth Harrington Photograph Collection (PH-00291). Inscription with image reads: "Driving the silver spike. Dr. Ray Lyman Wilbur, Secretary of the Interior, drives the last spike into tracks of railroads spur to the damsite. To the right of Dr. Wilbur is Senator Key Pittman. Nest to Pittman is Nevada Governor Fred Balzar. Second back from Senator Pittman is Las Vegas Mayor Fred Hesse. To the left of Dr. Wilbur is Carl R. Coray, Union Pacific Railroad president." - E(lizabeth) Harrington.

Note: Handwritten invitation Restaurant: The Grand Pacific Hotel Location: Chicago, Illinois, United States