Oral history interview with Leo Dunbar, Harry Hall, Harold Wadman, Carl Merrill, and Mary Ann Merrill conducted by Dennis McBride on June 24, 1986 for the Boulder City Library Oral History Project. The interviewees discuss their early lives and families, moving to Nevada, and starting work on the Hoover Dam. They recall memories of living in Boulder City, Nevada during the Great Depression and beyond, and share information about the construction of the dam and the city as well as personal stories about their lives in Southern Nevada.

Oral history interview with Harry Hall conducted by Dennis McBride on June 20, 1986 for the Boulder City Library Oral History Project. Hall discusses how the hope of work on the dam encouraged his move to Nevada with his mother and stepfather. He then talks at some length about living in a tent in Ragtown, the various illegal bootlegging establishments along the dirt road running between Las Vegas and Boulder City, Nevada, and working on the dam. He continues talking about working conditions, the heat, and the labor strike at the dam in August, 1931.

Oral history interviews with Elton Garrett conducted by Dennis McBride on November 10 and 11, 1986 for the Boulder City Library Oral History Project. In these interviews, Garrett talks about hitchhiking into Nevada in 1928, the beginning of his journalism career in 1929, and the development and construction of the Hoover Dam and Boulder City. He relates anecdotes about events and people during this early period and talks about the choice of The Six Companies, Incorporated to build the dam. He continues, talking about the impact of prohibition, bootlegging, and illegal gambling before 1931. Later he talks about his work as an educator in Boulder City, and the decision by the city to work toward self-government and incorporation.

Oral history interview with Lillian and Lloyd Morrison conducted by Don Morrison on October 20, 1991 for the UNLV Libraries Oral History Collection. The Morrison's talk about the loss of their Iowa farm in the Great Depression and Lloyd's decision to set out for Nevada to seek work at the Hoover dam construction site. He speaks at length about finding work, working on the dam, and an injury suffered in a fall that left him temporarily in a wheelchair. Lillian recalls arriving in Boulder City, Nevada some three years after Lloyd, of various homes the couple and their young son lived in, taking in boarders for extra money, and the growth and contraction of the town's population.

Oral history interview with Robert Griffith conducted by Jerry Gatch on March 19, 1976 for the Ralph Roske Oral History Project on Early Las Vegas. Griffith discusses arriving to Las Vegas, Nevada, and the development of railroads throughout Southern Nevada. He later talks about the first casinos, hotels, and the construction of Boulder (Hoover) Dam.

Oral history interview with Kenneth Ousley conducted by Patricia van Betten on October 02, 2009 for the History of Blue Diamond Village in Nevada Oral History Project. In this interview, Ousley discusses his personal history and moving to Blue Diamond, Nevada with his family. He talks about the work his father did as a miner at the Blue Diamond Mine and describes life in the village during the 1930s. Ousley recalls his visits to Las Vegas, Nevada and the construction of Boulder Dam (Hoover Dam). Lastly, Ousley talks about Cottonwood Ranch and the Blue Diamond school.

The Henry C. Wieking Photograph Collection contains black-and-white photographic prints and negatives, as well as postcards of Las Vegas, Nevada between approximately 1920 and 1940. These images primarily depict Wieking and his family in front of the Las Vegas Mormon Fort and Hoover Dam (Boulder Dam). Other photographs include Six Companies and United States Bureau of Reclamation vehicles, Mount Charleston, the Colorado River, Black Canyon, and desert scenes. The remaining images depict Barstow and Death Valley, California; and a Grand Canyon bridge in Arizona.