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.

The Six Companies, Inc. Hoover Dam Photograph Collection (1931-1935), consists of approximately 400 black-and-white photographic prints contained in two photograph albums and an additional twenty-one loose black-and-white photographic prints with ten corresponding photographic negatives.