"Aerial view, looking downstream from the Arizona side of Black Canyon. June 4th, 1935.
Aerial view, looking upstream toward Boulder Dam. June 4th, 1935
3321 Looking downstream from the Arizona side of Black Canyon, showing the reservoir level at the base of the Intake Towers. June 24th, 1935.
3339 Looking upstream from Observation Point, showing the reservoir area. June 24th, 1935."