Looking upstream before the cofferdams were in; Nevada side on left. Note work boat on Arizona side, carrying dynamite batteries from above dam to dam site. Note on back: "All the blasting Wint observed used a generator, not batteries. Later the power was provided by permanent lines. - James J. Hester, son-in-law of W. A. "Wint" Davis, photog."
An image of power generators at Hoover Dam. Caption on image reads: "Interior of powerhouse at Boulder Dam, with six 115,000-H.P generators installed. Service Bureau photo." Boulder Dam was officially renamed Hoover Dam in 1947.