Black and white image of the Hoover Dam tunnel construction site. There are four visible bridges over the Colorado River. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Pg.77 #3299 Boulder Dam and the Powerhouse, looking upstream from the lower portals road. June 1, 1935. Pg.77 #3301 View from the crest of Boulder Dam, looking downstream on the Powerhouse. Note the numerous roof trusses in place, and the Valve Houses in the background. June 1, 1935.
Pg.91 #3457 Looking upstream toward Boulder Dam and Power House. Sept. 26, 1935 Pg.91 #3460 From top of Boulder Dam, looking down on Power House. Roof slab is practically completed, and canyon wall gutters are in place. Sept. 26, 1935