Principles involved in the signing of the Boulder Dam bill. L-R: Elwood Mead, Phil Swing, President Calvin Coolidge, Sen. Hiram Johnson, Addison T. Smith, and W.B. Matthews. Text on photo reads: "Public Service History Written as Boulder Dam Bill Is Signed. December 21, 1928. Elwood Mead, Commissioner of Reclamation. Phil Swing, M. C. Cali., Author Boulder Dam bill House of Representatives. President Coolidge. Senator Hiram Johnson, Author Boulder Dam bill in United States Senate. Addison T. Smith, M. C. Idaho, Chairman, Committee on Reclamation, House of Representatives. W. B. Matthews. General Counsel, Boulder Dam Association, Los Angeles."

From the UNLV Libraries Single Item Accession Photograph Collection (PH-00171)

Black and white image with the following printed description: "Boulder Canyon. Mr. and Mrs. Tyrone Power visit Boulder Dam. With them are Mr. Marion McKeen (Thompson Trophy Pilot) who flew the Powers to Boulder City, and R. B. Spearman who conducted the party through the powerhouse." Note: Mrs. Tyrone Power was the actress, Annabella. Also, Boulder Dam was officially renamed Hoover Dam in 1947.