The Six Companies, Inc. Hoover Dam Photograph Collection (1931-1935), consists of approximately 400 black-and-white photographic prints contained in two photograph albums and an additional twenty-one loose black-and-white photographic prints with ten corresponding photographic negatives.

The Robert Woodruff Photograph Collection (1900s-1970s) consists of ninety-seven black-and-white photographs of locations and events in Clark County, Nevada. Locations include Las Vegas, Henderson, and Searchlight, Nevada, as well as the Hoover Dam. The majority of the images were taken between 1934 and 1962.

The Jamey Stillings Photograph Collection (2009-2019) is primarily comprised of photographs taken by professional photographer, Jamey Stillings, of the Mike O’Callaghan-Pat Tillman Memorial Bridge and the Hoover Dam project, the Ivanpah Solar Electric Generating System project, and the Crescent Dunes Solar project. The Mike O’Callaghan-Pat Tillman Memorial Bridge and the Hoover Dam project depict the construction of the Mike O’Callaghan-Pat Tillman Memorial Bridge from 2009 to 2012. The Ivanpah Solar Electric Generating System project depict aerial views of Ivanpah Solar in the Mojave Desert of California from 2010 to 2014. The Crescent Dunes Solar project consists of a range of aerial and ground-based work documenting SolarReserve's Crescent Dunes Solar, a 110MW concentrated solar plant with molten salt storage near Tonopah, Nevada, from 2014 to 2015.

The Irving Hirshon Photographs are comprised of 55 color slide photographs taken by Irving Hirshon in 1971 of Lake Mead, Hoover Dam, downtown Las Vegas, and the Las Vegas Strip. Hirshon is believed to have taken the slides in the summer of 1971 on a West Coast trip to celebrate his twenty-fifth wedding anniversary.

The Ray Cutright Collection of Winthrop A. Davis Photographs (approximately 1929-1939) consists of black-and-white photographic prints with some corresponding negatives and slides of the construction of Hoover Dam and the geographic terrain of southern Nevada during the early 1930s. Included are photographs of the geographic area around the dam site, Black Canyon, and Boulder City, Nevada. Photographs depict the construction of facilities and roads needed for the project.

The Frank D. Rathbun Photograph Collection dates from approximately 1915 to 1968 and consists primarily of black-and-white photographic prints and some corresponding negatives taken by Frank D. Rathbun and Michael Moen, who resurveyed the various sites Rathbun visited. The majority of the images depict petroglyphs located throughout the desert southwest in Nevada, California, and Arizona, as well as documentary images of the construction of the Los Angeles Aqueduct and the Hoover Dam transmission lines. Additional material includes postcards from areas Rathbun visited in California, Arizona, and Nevada.

The Henry C. Wieking Photograph Collection contains black-and-white photographic prints and negatives, as well as postcards of Las Vegas, Nevada between approximately 1920 and 1940. These images primarily depict Wieking and his family in front of the Las Vegas Mormon Fort and Hoover Dam (Boulder Dam). Other photographs include Six Companies and United States Bureau of Reclamation vehicles, Mount Charleston, the Colorado River, Black Canyon, and desert scenes. The remaining images depict Barstow and Death Valley, California; and a Grand Canyon bridge in Arizona.