The C. D. Baker Engineering Field Notebooks are comprised of the notebooks and informational texts Charles Duncan "C. D." Baker created and used between 1909 and 1966 while he served as the County Surveyor for Clark County, Nevada and the City Engineer for Las Vegas, Nevada. The field notebooks contain survey coordinates and elevation data for much of early Las Vegas and provide important information on early property boundaries, historical elevations, and lengths of streets from the 1920s to the 1960s. There are also oversized right of way maps for Clark County, Nevada.

The Wilson Family Papers (1875-1918) document the personal and professional lives of James B. Wilson Sr., James B. Wilson Jr., and George Twison "Tweed" Wilson, early pioneers in Southern Nevada. The collection is comprised of personal correspondence, invoices and advertisements from the Wilson family business, the Sandstone Ranch, and photographs of the extended Wilson family.

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.