"#418-419 - Panoramic view of Lower Portals of Diversion Tunnels Kb. 1 and No. 2, taken from Arizona side, Portal of No. 2 Tunnel enlarged to full size. Compressor Plant No. 3 on the left, and boat landing in foreground, October 28, 1931.
#425 - A close-up of a portion of #419 above. Marion Electric shovel, trucks and caterpillar bull¬dozer working on approach cut to Lower Portal Ho, 1. October 28-31.
#318- View looking up-stream toward damsite, which is at the second bridge. Note portals to tunnels No. 2, No. 3, and No. 4. Retaining wall on highway to top of dam in upper left. October 12, 1931."