From the Morgan Sweeney Photograph Collection (PH-00228). Placing field coils on Unit A-9 rotor, 28 coils are required for assembly and the rotor is built up from 4700 sheets in 1951.
From the Morgan Sweeney Photograph Collection (PH-00228). Unit A-4 isolated phase bus structure, installations in progress, spare transformer for Unit A-8 to left, September 17, 1951.
From the Morgan Sweeney Photograph Collection (PH-00228). Hoover Dam and Powerplant, double circuit cantilever rim tower C1 and 13Tlx, it serves A-9 and Bank "Y" May 2, 1951.
From the Morgan Sweeney Photograph Collection (PH-00228). Highline conductor stringing from tower C11T4 to C11T5, across Black Canyon. The winch is located on the Nevada side of the canyon, pulling conductor and insulator string across the canyon, the tire is attached to 1/4 inch haul back line for visibility August 27, 1951.
From the Morgan Sweeney Photograph Collection (PH-00228). An A-4, showing detail of conduit formed to be embedded in concrete, and forming at A-3 for the placement concrete in September 24, 1951.
From the Morgan Sweeney Photograph Collection (PH-00228). A unit A-9 transformer in transit via cableway to the Nevada wing for assembly on October 16, 1951.