The Six Companies, Inc. Hoover Dam Photograph Collection (1931-1935), consists of approximately 400 black-and-white photographic prints contained in two photograph albums and an additional twenty-one loose black-and-white photographic prints with ten corresponding photographic negatives.

Oral history interview with Jean Whitcher conducted by Michele deHoll on March 12, 1981 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Witcher discusses arriving to Las Vegas, Nevada in 1932 and describes the construction of Boulder (Hoover) Dam, Fremont Street before it was fully paved, and social life in Las Vegas at the time. Witcher then recalls her work in costume repair and construction as a seamstress at the El Rancho Hotel and Casino. Later, Witcher discusses her work in costume design and recalls some of her more memorable designs.

Oral history interview with Elsie Whipple conducted by Hugo A. Cascos Jr. on March 22, 1978 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Whipple discusses Southern Nevada history and recalls the construction of Boulder (Hoover) Dam. Whipple also recalls the first hotels and casinos to open on the Las Vegas, Nevada Strip, and her work as a missionary with the Mormon Church.

Oral history interview with Thomas Mulroy conducted by Don Kinney on February 27, 1979 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Mulroy discusses moving to Las Vegas, Nevada in 1950 from Chicago, Illinois due to health reasons. Mulroy discusses the positions he held working for Southern Nevada Power and Telephone Company; Bonanza Air Lines, before it was taken over by Hughes Airwest; and for the City of Las Vegas as the Senior Citizens Coordinating Officer.

Oral history interview with Barbara Mowry conducted by Jon Sedlacek on February 16, 1979 for the Ralph Roske Oral History Project on Early Las Vegas. In this interview, Mowry describes moving to Las Vegas, Nevada from California in 1949 to get a divorce, before remarrying and entering into the restaurant business with her new husband. Mowry discusses buying an established restaurant, the Villa Venice, with her husband, and the eventual fire that would destroy the restaurant in 1952.

Oral history interviews with Frances Montes conducted by Barbara Agonia on October 25, 2001, November 02, 2001, December 28, 2001, and August 24, 2002 for the Women's Research Institute of Nevada (WRIN) Las Vegas Women Oral History Project. Montes begins her interviews by describing growing up in a Latinx community in San Antonio, Texas in the 1940s. She discusses the rich culture of her community as well as her experiences with racism.

Oral history interviews with Florence McClure conducted by Joanne Goodwin on January 24, 1996 and February 06, 1996 for the Women's Research Institute of Nevada (WRIN) Las Vegas Women Oral History Project. McClure begins her interviews by discussing her family experiences growing up during the Great Depression. McClure then describes her early career working for the Illinios Department of Public Welfare, her travels around the country with her husband, and eventual settling in Las Vegas, Nevada.

Oral history interview with Janet Savalli conducted by Irene Rostine on September 21, 1996 for the Women's Research Institute of Nevada (WRIN) Las Vegas Women Oral History Project. Savalli begins her interview by discussing her move to Las Vegas, Nevada as a child in 1945. Savalli then goes on to discuss her 46 year long career at the Southern Nevada Telephone Company. She describes rising through the company starting as an operator and ending as a community relations coordinator.

Oral history interview with Hazel Hedges conducted by Irene Rostine on October 29, 1997 for the Women's Research Institute of Nevada (WRIN) Las Vegas Women Oral History Project. Hedges opens her interview by discussing her move to Las Vegas, Nevada from Kansas in 1952. She discusses what it was like to move across the country at that time and her search for employment. Hedges describes her work as a waitress at the Thunderbird Hotel and her true interest, real estate.