The James H. Down Jr. Photograph Collection (approximately 1915-1940) consists of black-and-white photographic prints and negatives, as well as color photographic slides and postcards. The images depict scenes in and around Las Vegas and Goodsprings, Nevada. Also included are Glenn Davis' photographs of the Hoover Dam (Boulder Dam), Black Canyon, the Colorado River, and Lake Mead. Most of the images portray the construction phases of the Hoover Dam.

Oral history interview with Patty Boyd conducted by Joyce Marshall Moore on October 24, 2003 for the Boyer Early Las Vegas Oral History Project. In this interview, Boyd discusses her personal history and living in Boulder City, Nevada from the 1930s to the 1950s. She describes the construction of Hoover Dam (Boulder Dam), segregation in Las Vegas, Nevada in the late 1940s, recreational activities in Boulder City, and the growth of Henderson, Nevada. Lastly, Boyd recalls the blackouts during World War II and the plane crash of Carole Lombard.

Oral history interview with Marion Allen conducted by Dennis McBride on April 14, 1986 for the UNLV University Libraries Oral History Collection. In this interview, Allen discusses the construction of the Hoover Dam (Boulder Dam) and his father’s employment on the dam. He talks about becoming a dam construction worker and the working conditions during the early stages of the dam. Allen recalls the labor strike in 1935 and the opening of the dam. Lastly, Allen talks about engineer Frank Crowe’s involvement with the the project.