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 Red Rock Canyon National Conservation records (1965-2007) contain information about the Red Rock Canyon National Conservation Area (previously the Red Rock Canyon Recreation Lands). It largely consists of newspaper clippings on a variety of events related to Red Rock Canyon from 1965 to 1998 with the bulk from the 1980s and 1990s. The records also include Bureau of Land Management documents pertaining to interpretive efforts, visitation statistics, and law enforcement reports. Also included are the newsletters (1990-1998) and volunteer training manual of the Friends of Red Rock Canyon, a non-profit volunteer organization.

The Rick L. May Papers document social and political activities of Las Vegas, Nevada's lesbian, gay, bisexual, and transgender (LGBT) community from 1982 to 1997. The papers include records from the Gay Academic Union of the University of Nevada, Las Vegas; various gay pride celebrations in Los Angeles, California and Las Vegas; the Metropolitan Community Church's outreach to the LGBT community; as well as Rick L. May's own notes and collections about LGBT-supportive stores like R and R Assordid Sundries. The collection also includes several t-shirts that commemorate the pride celebrations. The papers demonstrate how the pride celebrations that began in 1984 were the result of efforts from several sectors of Las Vegas' LGBT community.

The Fraternal Order of Eagles (F.O.E.), Las Vegas Chapter Records (1906-2001) consist primarily of scrapbooks, attendance and meeting minute record books, correspondence, and an accounting ledger from F.O.E. Aerie #1213 and its associated Women’s Auxiliary and Retired Eagles Activities Club (REAC) located in Las Vegas, Nevada. The scrapbooks contain newspaper articles, photographs, memorandums, and state and national F.O.E. convention information. The collection also contains REAC secretary documents including the club charter, constitution, and bylaws. The F.O.E. is an international non-profit fraternal organization.

The Mollie Gregory Collection of Oral Histories contains audio interviews and brief transcripts that focus on welfare, family, and women's issues in Nevada from 1970 to 1974. Gregory interviewed Nevada residents including Maya Miller, Ruby Duncan, and Mary Wesley, who described their lives during the anti-poverty and women's rights campaigns in the early 1970s. The collection documents views on welfare; the Equal Rights Amendment; race, discrimination, and civil rights; and political campaigns.

The Alan Bible Photograph Collection contains color photographic prints of the Hoover Dam; an aerial of the Colorado River; an Atomic Energy Commission drill rig in Central Nevada; and views of a Nuclear Rocket Development Station (NRDS) facility at the Nevada Test Site between approximately 1970 to 1974. These photographs are captioned and were originally framed and hung in Alan Bible's United States Senate office.