Materials contain photographic prints, photographic slides, and photographic negatives depicting the Hoover (Boulder) Dam from 1930 to 1959. The photographs primarily depict the completed dam, including its upstream and downstream faces, diversion tunnels, outlet works, powerhouse, intake towers, crest, and spillways. The photographs depict the dam from numerous angles, including photographs taken from both the Nevada and Arizona sides of the dam, the Colorado River, Lake Mead, and aerial photographs taken from planes.

Materials contain photographic prints, photographic slides, and photographic negatives that depict Lake Mead from 1930 to 1959. The photographs primarily depict people engaged in recreational activities on or around Lake Mead, including fishing, swimming, and boating. The photographs also depict some of the canyons that Lake Mead touches, including the Grand Canyon, Iceberg Canyon, Black Canyon, Boulder Canyon, and Quartermaster Canyon. Also included in the photographs is the lookout point near the shores of Lake Mead where the dedication plaque for Dr. Elwood Mead, the lake's namesake and former head of the Bureau of Reclamation, is installed.

Materials contain photographic prints, photographic slides, and photographic negatives that depict Las Vegas, Nevada from 1930 to 1967. The photographs primarily depict downtown Las Vegas, especially the hotels, casinos, and clubs on Fremont Street: the Hotel Last Frontier, Sands Hotel, Frontier Club, Pioneer Club, Sal Sagev Hotel, Overland Hotel, Northern Club, Las Vegas Club, Apache Club, Eldorado Club, El Rancho Vegas Hotel, Golden Nugget, Boulder Club, and Desert Inn. The photographs also depict several hotels on the Las Vegas Strip, including the Flamingo Hotel and the Thunderbird Hotel.

Materials contain photographic prints, photographic slides, and photographic negatives of people in the Southwestern United States from 1930 to 1960. The photographs primarily depict Navajo and Pueblo Native Americans, small towns in Arizona and Nevada, mining operations, and service stations.

Materials contain photographic prints, photographic slides, and photographic negatives depicting landscapes in the southwestern United States. The photographs primarily depict natural features in Nevada, including the Colorado River, Black Canyon, Valley of Fire, and Mount Charleston. The photographs also depict the Grand Canyon in Arizona, atomic tests at the Nevada Test Site, and the areas around Lake Mead.