"3171 Looking upstream toward Boulder Dam, from the lower portals road. Note the downstream cofferdam excavation. March 26th, 1935.
3157 General view, taken from the Nevada side, looking downstream on Boulder Dam. March 25th, 1935.
3151 Looking down on Boulder Dam, showing the finished roadway, and the Intake Bridge girders in place.
March 25th, 1935."