The Colorado River and Hoover Dam file consists of black-and-white photographic prints and negatives from approximately 1945 to 1956. The images depict the exterior and interior of the Hoover Dam, as well as aerial images of the Hoover Dam and the Colorado River.

The Lake Mead recreational activities file consists of photographic prints and negatives from approximately 1945 to 1956. The images depict various recreational activities at Lake Mead, including boating, fishing, camping, and swimming. The Lake Mead Boat Company used most of these images for publicity and advertisements.

The nature, wildlife and abandoned watermill file contains black-and-white photographic prints from approximately 1945 to 1956. The images depict various plants, trees, and animals indigenous to southern Nevada.