The River Mountains Trail Partnership Records date from 1995 to 2015 and document the planning and construction of the River Mountains Loop Trail in Clark County, Nevada. The collection contains meeting agendas and minutes, correspondence, project notes, trail maps, land surveys, grant applications, photographic slides of the trail and Lake Mead, environmental assessments, ephemera from National Trails Day, trail guides, interpretive plans, and development reports.

The Joe Williams Music Scores date from 1940 to 1991 and comprise the handwritten musical scores of American jazz musician Joe Williams, born Joseph Goreed. Many of the musical scores are Williams' original arrangements.

The Aaron Williams Photograph Collection (approximately 1968 to 1983) consists of three black-and-white photographic prints. Two of the images are of the groundbreaking ceremony of the Senior Citizens’ Center with Las Vegas, Nevada Mayor Oran Gragson, and the third of three unidentified individuals.

The Nevada Mining Collection is comprised of records that document mining and mines in Nevada from 1842 to 1966. The majority of the collection includes records of various mines and mining companies located in the Esmeralda, Lincoln, Clark, White Pine, and Nye counties, dating from 1900 to 1928. The collection includes financial, administrative, and business related records; photographs of miners, mining camps, and towns; correspondence; maps; newspaper clippings, pamphlets, newsletters, and booklets.