Oral history interview with Afton Powers conducted by Stephen Johnson on January 22, 1972 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Powers discusses living in St. Thomas, Nevada before the town was submerged in water after the construction of Hoover Dam (Boulder Dam). She describes the utilities they had, her recreational activities, and how the town prepared for its eventual submersion.

The Tom Mead Photograph consists of a black-and-white photographic print from 1928. The image depicts members present for the Presidential signing of the Boulder Canyon Project Act on December 21, 1928, including Elwood Mead, Calvin Coolidge, and Hiram W. Johnson.

Oral history interview with Vernon G. Stockall conducted by Stephanie Aylward on February 11, 1979 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Stockall discusses arriving to Pioche, Nevada in 1935 as a miner. Stockall then describes the early aboveground atomic tests that were done at the Nevada Test Site. Stockall later shares his thoughts on the growth of gaming in Las Vegas, Nevada. Stockall also recalls the growth of Boulder City, Nevada and the construction of Boulder (Hoover) Dam.

Oral history interview with Betty Ham Dokter conducted by Roger Jablonski on February 27, 1977 for the Ralph Roske Oral History Project on Early Las Vegas. Dokter describes church activity and the first casino properties that were built. She later talks about presidential visits, economic changes in Nevada, and the construction of Hoover Dam. The latter part of the interview covers the topics of racial minorities, as well as social and environmental changes.

The Merle Frehner Map of St. Thomas, Nevada (1981) consists of a hand-drawn map by Frehner of St. Thomas, Nevada who lived there from 1914 to 1932. The town was abandoned in 1933 due to the construction of Hoover Dam and is now beneath the waters of Lake Mead. Also included are instructions to the Geography 135 class at University of Nevada, Las Vegas to reproduce the map, which became a student project.

Oral history interview with LaMar Foremaster conducted by Gregory M. Hall on February 14, 1979 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Foremaster discusses the changes, growth, and development of Southern Nevada from 1907 to 1979. Foremaster also discusses the Old Ranch, Boulder Dam, Hoover Dam, Fremont Street and the Strip. He then talks about his religious ties to the Mormon Church and his political activities in Las Vegas, Nevada.

Oral history interview with James Cashman Jr. conducted by A. D. Hopkins on August 13, 1998 for the Las Vegas Review-Journal First 100 Oral History Project. In this interview, Cashman discusses his father, James Cashman Sr., moving to Las Vegas, Nevada from Searchlight, Nevada for more opportunities. Cashman goes on to talk about his childhood and his relationship with his father. Finally, Cashman describes his father working on the Hoover Dam (Boulder Dam).