The Ernest Mitchell Pratt Photographs (approximately 1932-1936) consist of black-and-white photographic prints, signed and unsigned, taken by Pratt while Hoover Dam was under construction. Many prints are signed and mounted, and two are noted as award-winning photographs shown at the Annual International Salon of Camera Pictorialists in Los Angeles, California. There are additional working prints included alongside the final prints for most of the scenes. Also included in the collection is one small photograph of Pratt. This collection was formerly known as the Price Photograph Collection.

The Frank C. "Doc" Jensen Photograph Collection (approximately 1920-2005) is comprised of one black-and-white photographic reprint and copy negative of Frank Jensen standing near the partially-constructed Hoover Dam (Boulder Dam) and a photographic negative depicting Jensen in a naval dress uniform standing in front of a wall that indicates height.

Oral history interview with Mary R. Stout conducted by Greg Rowland on February 20, 1980 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Stout discusses her personal history and living in Boulder City, Nevada. Stout describes living in "Ragtown," a makeshift settlement for workers constructing Hoover Dam (Boulder Dam) before Boulder City was established. She also describes her father's duties as a pipe fitter while working on the construction of Hoover Dam (Boulder Dam) and how Boulder City has changed and evolved. Stout concludes by talking about nuclear weapons tests, her careers, and gambling in Boulder City.

Oral history interview with Henry E. Wellman conducted by Rebecca Rounds on March 14, 1981 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Wellman discusses his personal history and the history of Boulder City, Nevada. Wellman describes the construction of Hoover Dam (Boulder Dam), being a laborer working on the dam, and life in Boulder City during the 1940s. He talks about the United States government selling housing and land after the completion of Hoover Dam and how Las Vegas, Nevada has changed and expanded. Wellman also discusses the legalization of alcohol in Boulder City.

Oral history interview with William French conducted by Connie Degernes on November 18, 1974 for the Ralph Roske Oral History Project on Early Las Vegas. French discusses life living near Boulder (Hoover) Dam in Boulder City, Nevada.

Oral history interview with William Nickell conducted by James Greene on January 07, 1975 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Nickell discusses his job at the Boulder (Hoover) Dam and his life in Boulder City, Nevada.

Oral history interview with Leo Dunbar conducted by Connie Degernes and Helen Littleton on February 24, 1975 for the Ralph Roske Oral History Project on Early Las Vegas. Dunbar discusses the construction of Boulder (Hoover) Dam.