Black and white image of Hoover Dam with the following printed description: "View looking upstream in the Nevada turbine gallery. The runner for turbine N-2 has been placed and the wicket gates are about to be set." Note: Boulder Dam was officially renamed Hoover Dam in 1947.
From the Morgan Sweeney Photograph Collection (PH-00228). Intake tower, lower cylinder gate modification, showing the detail of making the cut, buring, of the lower section gate. Note that the skin-plate hanging with holes burned through for lifting out, you can also see the cutting machine and guide detail. The welders from left to right are E.M. Fitzgerald and Oulie Cameron in November 1951.
From the Morgan Sweeney Photograph Collection (PH-00228). Interior view of A-8-9 penstock. Dark spots at 45 degree from vertical and horizontal mark the location of lower set of piezometer taps. Taps locations have been cleaned and repainted. Note wire projecting into penstock, upper right, locating tap hole. Pool of water visible at bottom, tire hoist inside 30-foot penstock at top of raise.