A colored postcard showing an artist's representation of The Babcock and Wilcox Pipe Plant next the construction site of Boulder Dam, a title that would later be changed to Hoover Dam. Because the penstock pipes at Hoover Dam were too large to be carried over railroads, this plant was built to fabricate the largest penstock pipes in the world. Transcribed onto the top border of the image: "The Babcock & Wilcox Pipe Plant, Boulder Dam."
A boat on the rising waters of Lake Mead near the intake towers of Hoover (Boulder) Dam shortly after the completion of construction. Boulder Dam was officially re-named Hoover Dam in 1947.
Transmission tower and lines near Hoover Dam. Caption on top of postcard reads: "Boulder Dam power for Arizona! Towers like this will carry low-cost energy into Arizona when this state follows the example afforded by California and Nevada." Boulder Dam was officially re-named Hoover Dam in 1947.