"3487 Boulder Dam and Powerhouse, looking upstream from the lower cofferdam. October 28th, 1935.
3501 Looking upstream in No. 2 downstream plug, showing the water conduit being placed. October 28th, 1935.
3500 Boulder Dam Switchyard, showing the excavation and construction. Note the Boulder Dam Highway in the back¬ground. October 28th, 1935.
3506 Looking upstream toward No. 3 downstream plug. Note the clean-up operations, getting ready for the
carpenters. October 29th, 1935."