Oral history interview with Ruth and Jake Dieleman conducted by James M. Greene on November 15, 1974 for the Ralph Roske Oral History Project. The Dielemans discuss their life in Southern Nevada. Ruth first talks about growing up in Searchlight, Nevada, and her experiences as an educator. Jake discusses immigrating to the United States and working in construction rigging at the Hoover Dam. He also discusses his work in various Las Vegas, Nevada casinos and in the state legislature.

The Irving Hirshon Photographs are comprised of 55 color slide photographs taken by Irving Hirshon in 1971 of Lake Mead, Hoover Dam, downtown Las Vegas, and the Las Vegas Strip. Hirshon is believed to have taken the slides in the summer of 1971 on a West Coast trip to celebrate his twenty-fifth wedding anniversary.

Oral history interview with Merle Frehner conducted by Robert Laas on July 05, 1975 for the Ralph Roske Oral History Project on Early Las Vegas. Frehner discusses atomic testing, freighting, the "Arrowhead Trail", the Great Depression, and Boulder (Hoover) Dam in Nevada.

The William Mors Audiovisual Collection (approximately 1989-2001) contains material created by William Mors Productions and the Las Vegas History Foundation. Subjects include Hoover Dam, entertainment in Las Vegas, Liberace, and the history of Las Vegas. The collection consists of vhs tapes, U-Matic tapes, betamax, and other formats and are originals, masters, edited masters, clips, and final production tapes.

Oral history interview with Willis Evans conducted by Kathleen Morgan La Spina on December 02, 1986 for the Ralph Roske Oral History Project on Early Las Vegas. Evans discusses arriving and living in Las Vegas, Nevada. Evans also discusses being involved in the civic organization, District Attorney Youth Advisory Group. The interview concludes with a discussion of Boulder (Hoover) Dam, and changes in Las Vegas’ economy, politics, and environment.

Oral history interview with Leo Dunbar conducted by Jay Brewer on May 05, 1975 for the Ralph Roske Oral History Project on Early Las Vegas. Dunbar discusses the growth of Boulder City, Nevada, the construction of Boulder (Hoover) Dam, and World War I.

The Barbara and John Kizziar Photograph Collection primarily contains black-and-white photographic prints and negatives of Hoover Dam (Boulder Dam) construction during John Kizziar’s time working for Six Companies Inc. between approximately 1986 and 1992. These images are reproductions of originals taken from between approximately 1930 and 1945. They detail John Kizziar’s work life during the dam’s construction, as well as events and scenes associated with the dam. Other images portray billboards and streets in Boulder City, Nevada. The collection also depicts other locations in Nevada, including Las Vegas, Mount Charleston, Black Canyon, the northern Mojave Desert, and the Colorado River ferry crossing between Nevada and Arizona.