The Chester R. Longwell Professional Papers (1886-1974) document Longwell's professional career as a geologist and his pioneering field work in Clark County, Nevada. Included are Longwell's field notes; manuscripts, articles and speeches related to geology; personal and business correspondence; professional publications; subject and name files; specimen tags; photographic prints, negatives, and slides; and geological and topographical maps, primarily of Nevada, California, Arizona, and Utah.

The MacDonald Ranch Development Records (1972-2010) contain correspondence, maps, land assessments and investigations, master plans, architectural drawings, civil drawings, and landscape drawings primarily detailing the community development process of MacDonald Ranch, one of the oldest master-planned communities in Henderson, Nevada.

The MGM Mirage Corporation Records date from 1970 to 2010 and consist of the records of the Las Vegas, Nevada based global entertainment company. The collection contains organizational records, employee newsletters, files about the MGM Mirage diversity and inclusion initiative, correspondence, reports on gambling addiction, gambling statistics, press clippings, and audiovisual materials. There are also photographs, photographic slides, and photographic negatives of performers, corporate executives, and MGM Mirage properties.