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.

The Stocker Family Papers (1860-1982) document the family’s personal, political, and business interests including Mayme Stocker’s 1931 Nevada gaming license and Harold Stocker’s involvement in the Nevada Republican party. The collection contains family correspondence, political documents and planning materials, and business records related to the family’s gaming and real estate interests.

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 Benedict Family Papers materials date from roughly 1905-1998 and are comprised of correspondence and letters (1969-1971) written to Howard Hughes by the public. The collection also contains correspondence written to Robert Maheu, former chief executive of Nevada operations for Howard Hughes. The collection also includes a variety of casino and gambling related product catalogs, gaming guides for Las Vegas casinos, and of research papers and reports primarily relating to sports betting and cheating.

The collection is comprised of architectural drawings (1952-1997) completed by American architect, Ethan Jennings Jr. and/or his architectural firm, Ethan Jennings Jr., AIA, CSI and includes Jenning's work from the firm of John Badgley, AIA, where Ethan Jennings Jr. worked in Southern California during the 1950s, as well as work Jenning's completed with Americo Inc., and Tolosa Group. The collection contains 217 sets of drawings, 6 boxes of project records, and 8 flat files of oversized material from over 200 different projects primarily located in California with some projects located in the Las Vegas area. The materials feature hand-drawn architectural drawings, ranging from preliminary sketches to construction documents. The drawings also contain work from consultants, engineers, and other architects who collaborated on the development of the various projects. The drawings include: commercial, industrial, professional, civic, residential, and religious buildings of varying scales, such as libraries, apartments, warehouses, office developments, schools, military buildings, churches, and custom single-family homes located throughout California and Las Vegas. The drawings also include a number of additions, remodels, and renovations. The collection also contains project records like structural calculations and drawings, project manuals and specifications, bid documents, and professional correspondence.

The Maria LaCavera Papers (1947-2017) contain the papers of professional dancer Maria LaCavera. The collection documents the career of LaCavera dancing in Las Vegas, Nevada at the Flamingo Hotel in 1947, and the Last Frontier Hotel in 1949 as one of the Ramona Girls dancing in the Danny O'Neil Varieties Act. Materials include photographs of LaCavera and other Ramona Girls, newspaper clippings, correspondence, LaCavera's American Guild of Variety Artists (AGVA) employment contracts, Fabulous Las Vegas magazines, and hotel receipts. Other items of note include photographs of the 1949 Helldorado parade, a Frontier Hotel Ramona Room menu, and Frontier Hotel ephemera. There is also a copy of a self-published biography of LaCavera, written by her daughter-in-law Kristin Meyer entitled From Bon-Air to the Last Frontier. The collection also contains the digital images used to illustrate the book.