The Blue Diamond Mine Corporate Records (1918-2005) consist of operational and organization records of the gypsum mining and milling operations located in southwest Clark County, Nevada. Materials include operational records related to individual boring sites at the mine; milling operations and statistics; and equipment operations and statistics, including maps, field notebooks, and photographs. There are also daily, weekly, and monthly organizational records related to employee work schedules and safety reports for the mining operations, including accident reports and a safety education training program.

The Las Vegas, Nevada Strip Hotel Labor Relations Collection comprises legal documents, correspondence, and human resources manuals and pamphlets related to labor in the hospitality industry on the Las Vegas Strip in Nevada from 1963 to 2008. The majority of documents involve the Culinary Union, the Bartenders Union, the Teamsters Union, MGM Mirage affiliated hotel casinos, the Dunes Hotel, and the Sands Hotel and Casino.

The Chester Longwell Photograph Collection consists of 608 black-and-white photographic prints dating from approximately 1910 to 1930. The images primarily depict the Longwell family's excursions in the Southern Nevada region, primarily to Mount Charleston, Nevada. Also included are images of Southern Nevada mines and mining towns, as well as Pubelo Grande de Nevada, the Lost City. The remaining images depict geological formations and features, as well as forestry and nature scenes in Nevada and Arizona.

The Harrah’s Entertainment, Inc. Photograph Collection contains black-and-white and color photographic prints, negatives, postcards, and slides of William "Bill" Harrah at events in Nevada between approximately 1930 and 1991. Also included are views of Harrah’s Nevada properties including Harrah’s Lake Tahoe Hotel and Casino, Harrah’s Reno Hotel and Casino, and the Holiday Inn Hotel and Casino (that later became Harrah’s Las Vegas Hotel and Casino).

The Yucca Mountain Environmental Safety Collection (1970-2011) consists of reports and impact studies collected by Clark County's Nuclear Waste Division library for documenting Yucca Mountain's potential health and safety risks to Southern Nevada. The reports contain documents pertaining to potential environmental, health, financial, and safety risks from the Yucca Mountain Nuclear Waste Repository, which is located in Nye County, Nevada. The collection contains scientific and social studies in support of and opposition to the site. The bulk of the collection includes licensing reports, site selection studies, and impact studies from transporting, storing, and handling radioactive waste and spent nuclear fuel.