The John C. Olsen Photograph Collection, approximately 1950 to 1969, consists of black-and-white photographic prints and negatives. Images depict scenes from the annual Helldorado Celebration in Las Vegas, Nevada, the Shriners’ Parade in downtown Las Vegas, various hotels along the Las Vegas Strip, the Last Frontier Village at the Last Frontier Hotel, Las Vegas, natural landscapes at Mount Charleston and Rhyolite, Nevada, Hoover Dam and Lake Mead, Twin Lakes, and petroglyphs in Valley of Fire Nevada State Park.

Oral history interview with Dan McKenzie conducted by Connie Degerness on February 12, 1975 for the Boulder City Library Oral History Project. In this very short interview, McKenzie explains why he came to Nevada from Arizona, finding work on the Hoover Dam construction in April 1930, and then lists all of his subsequent work in maintenance and mechanics during the dam's construction.