The Edith Giles Barcus Family Photograph Collection (approximately 1878-1954) consists of black-and-white photographic prints and negatives, as well as postcards and photograph albums. The images depict locations in Nevada including Las Vegas, Goldfield, Searchlight, and Tonopah, in addition to locations in Arizona, California, Colorado, Massachusetts, Utah, and Mexico. Also included are images of family, friends, and associates of the Giles Barcus family. The albums contain photographs depicting the Giles family as they traveled through the southwest United States and Mexico, as well as postcards from prominent locations in the southwestern United States.

The Lois Wright Potter and Logan Wright Photograph Collection (approximately 1895-1931) consists of black-and-white photographic prints and negatives. The images depict Southern Nevada towns, including Delamar, Hiko, Pioche, Tonopah, Richardville, Pahranagat, Alamo, and Goodsprings, Nevada.

The Boulder City 31ers Photograph Collection depicts the construction of the Hoover (Boulder) Dam and the development of Boulder City, Nevada from 1930 to 1987. The photographs primarily depict construction of the Hoover Dam, but they also depict workers, dormitories, the Colorado River, stores, and Black Canyon.

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.