"3224 Boulder Dam, looking upstream from the lower portals road. The lower coffer¬dam excavation has nearly been completed. Power House structures and Arizona Valve House shown. April 25th, 1935.
3220 Looking downstream at Boulder Dam, from the Arizona side, showing the four Intake Towers. April 25th, 1935.
3243 View looking downstream, showing Boulder Dam, Intake Towers and the Spillways, from the Newada side of
the river. April 26th, 1935.