Oral history interview with Louise LeClair conducted by Dennis Luppens on March 21, 1978 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, LeClair talks about her family history in Nevada, and the flu epidemic of 1918. She specifically talks about Boulder (Hoover) Dam, Eldorado Fair, and how Las Vegas, Nevada has grown.

Oral history interview with Cliff Luzier conducted by Jerry Masick on May 27, 1974 for the Ralph Roske Oral History Project on Early Las Vegas. Luzier discusses arriving to Las Vegas, Nevada to work on the Boulder (Hoover) Dam in 1932. Luzier also discusses his personal history and recalls experiencing the ways Las Vegas, Nevada has developed.

The James Cashman Sr. Photograph Collection (approximately 1905 to 1975) consists of black-and-white photographic prints, negatives, slides, and albums as well as a glass plate negative. The photographs depict four major subjects: Cashman's family, friends, and associates; Cashman's businesses; the Hoover Dam and Colorado River; and various locations across Nevada.

Oral history interview with Gene Leavitt conducted by his son, Monte Leavitt, on February 28, 1979 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Mr. Leavitt talks about his career as a truck and bus driver. He also talks about the life in Southern Nevada, the soldiers stationed here, and gambling. Leavitt also briefly discusses doing drilling work on the Boulder (Hoover) Dam.

The L. F. Manis Photographs contain photographic prints, photographic slides, and photographic negatives depicting Southern Nevada from approximately 1900 to 1969, with a bulk of the materials dating from 1930 to 1940. The photographs primarily depict the construction, dedication, and various parts of the Hoover (Boulder) Dam, including the dam's upstream and downstream faces, intake towers, spillways, bridges, crest, outlet works, visitors' accommodations, and powerhouse. The photographs also depict Lake Mead, the reservoir created by the Hoover Dam, and the Colorado River, which is dammed by the Hoover Dam. The photographs also include views of desert landscapes in the Southwestern United States, including in Nevada, Arizona, and Southern California. Also depicted in the photographs are the cities of Las Vegas, Nevada and Boulder City, Nevada, including prominent buildings like hotels, casinos, government buildings, and train depots.

Oral history interview with Steven Ligouri conducted by Claytee White on January 20, 2010 for the Voices of the Historic John S. Park Neighborhood Oral History Project. Ligouri discusses his career as a sculptor making jewelry in his father's business and making the statue High Scaler at Hoover Dam. He also discusses living in the John S. Park Neighborhood and on a family farm in North Las Vegas, Nevada and Boulder City, Nevada.

Oral history interview with Neil H. Holmes conducted by James Greene on January 14, 1975 for the Ralph Roske Oral History Project on Early Las Vegas. Holmes discusses the Boulder City, Nevada education system, family life, employment opportunities, housing, and the building of Boulder (Hoover) Dam.