The Union Pacific Railroad Collection (1828-1986) is comprised of the original corporate records of the Union Pacific Railroad's operations in Southern Nevada, Utah, and Southern California, particularly focusing on Las Vegas and Los Angeles. The collection documents the purchase of Stewart ranch and the construction of the original depot and town which became modern Las Vegas. The collection also contains the records of the Las Vegas Land & Water Company (LVL&W), a subsidiary of the railroad formed in 1905 to handle the railroad's land transactions. The collection contains office files, correspondence, reports, leases, various legal, governmental and financial document, the collection contains large and small format maps, architectural and engineering drawings, published technical reports, railroad operational manuals, bound legal briefs, ledgers, and payroll and receipt books. The collection also includes the personal files of Walter Bracken, the Union Pacific's special representative in Nevada and vice president of the Las Vegas Land and Water Company, and a paper index of the collection materials.

The Stardust Resort and Casino Records (1950-2006) contain materials of the Stardust Resort and Casino, which operated in Las Vegas, Nevada from 1958 to 2006. The collection contains materials on events hosted by the Stardust, the resort and casino's corporate history, interior and exterior building design, and performers. The collection also includes photographs, negatives, and slides that document the history of the resort and casino. Newspaper and magazine clippings, advertisement and marketing materials related to the Stardust's venues, shows, entertainers, and events are also present in the collection. The collection also contains a significant amount of audiovisual material, including VHS tapes, audio cassettes, optical discs, film reels, and cassette tapes containing footage and audio recordings of Stardust show promotions, news broadcasting clips, interviews, and commercials featuring the Stardust.