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 Southern Nevada Telephone Company Collection documents the history of the company from 1957 to 1966. The collection includes photographs and internal publications that illustrate the company's growth and role in Las Vegas' history. It also contains a photocopy of A History of the Southern Nevada Telephone Company, 1907-1961.

The George Kelly Ryan papers (1921-1971) contain correspondence inquiring about Octavius Decatur "O. D." Gass, newspaper clippings from 1929, handwritten recollections of the Gold Ranch by Laura Royce, and a San Pedro, Los Angeles and Salt Lake Railroad Company information, including information on wash-outs in Nevada.

The Clark County 208 Water Quality Management Plan Records contain reports produced by consultants and agencies for the Clark County Board of County Commissioners to create the Clark County, Nevada 208 Water Quality Management Plan (1960-1990). The collection also includes amendments and studies about the implementation of the plan.