The Nevada State Protection of Marriage Initiative Collection (2000) consists of Clark County, Nevada petition signatures in favor of the initiative to exclude gay and lesbian Nevadans from marriage. The "Protection of Marriage Initiative" was also known as Question Two on the ballot. Much of this material is photocopied from the Nevada State Archives and contains pages from Clark County, including Boulder City, as well as notable Southern Nevada signatures.

The Ward Lindquist Photograph Collection on Lake Mead (approximately 1945-1956) contains black-and-white photographic prints and negatives primarily from Hoover Dam and Lake Mead, both located in both Arizona and Nevada. The images depict recreational activities at Lake Mead, namely fishing, swimming, boating, and camping. The remaining images depict the exterior and interior of Hoover Dam, as well as nature and wildlife in southern Nevada.

The Nellie Bunch Collection of Lake Mead Postcards (approximately 1970-1979) contains two postcards advertising Lake Mead in southern Nevada from the 1970s. Each postcard depicts several aspects of the Lake Mead National Recreation Area, including the marina, Hoover Dam, campgrounds, the Lake Mead Lodge, and Boulder Beach. Also included is a "Post Office Closed" sign for Whitney, Nevada with Nellie Bunch listed as Postmaster.

The Art Rader Photograph Collection on Nevada Railroads depicts railroads, mills, and depots in Nevada and Southern California from 1905 to approximately 1975. The photographs primarily depict the remnants of the Tonopah & Tidewater Railroad, the Pacific Coast Borax Company, and obsolete tracks, buildings, mills, and boxcars from the early-twentieth century. The photographs also depict depots and railroad intersections in Death Valley Junction, California and Crucere, California, and the photographs include the Union Pacific Railroad's tracks that were once part of the Salt Lake Railroad.

The Ruby Duncan Photograph Collection on Operation Life (1970s-1980s) is comprised primarily of photographic prints with some corresponding 35 mm negatives of Ruby Duncan and other Operation Life organizers, as well as important organization buildings. Materials include photographs of Ruby Duncan, Aldine Weems, Renee Diamond, and Jack Anderson in the original Operation Life Las Vegas, Nevada Operation Life headquarters and the regional office in San Francisco, California. Also pictured are other employees and beneficiaries of the organization at a Christmas Party.

The C. A. Earle Rinker Photograph Collection of Goldfield, Nevada (approximately 1900-1915) contains individual black-and-white photographic prints, photographic albums, black-and-white and tinted postcards, and photographic negatives that document the history of early twentieth century Goldfield, Nevada. The images include photographic prints of Goldfield and surrounding areas during its peak years of 1906-1910; postcards showing scenes of Goldfield, Tonopah, and other areas in central Nevada; and negatives that contain images of Rinker's family and homelife in Indiana and Illinois.

The Edith Giles Barcus Family Photograph Collection (approximately 1878-1954) consists of black-and-white photographic prints and negatives, as well as postcards and photograph albums. The images depict locations in Nevada including Las Vegas, Goldfield, Searchlight, and Tonopah, in addition to locations in Arizona, California, Colorado, Massachusetts, Utah, and Mexico. Also included are images of family, friends, and associates of the Giles Barcus family. The albums contain photographs depicting the Giles family as they traveled through the southwest United States and Mexico, as well as postcards from prominent locations in the southwestern United States.