p.12 #1055 Low level concrete mixing plant. View taken from cliffs on Arizona side of river. Mar. 28, 1932. p.12 #1113 Night view, looking upstream from below lower portals of diversion tunnels. Canyon presents a spectacular sight at night with myriads of lights. Apr. 8, 1932. p.12 #1058 Telephoto picture, similar to No.1055, to the left. Mar. 28, 1932. p.12 #1101 With the approach of annual spring rise in the river, the temporary truck bridge shown on right has been abandoned. Apr. 12, 1932.
p.19 #1431 Excavation for benches for movable cableway towers being carried on, near Lookout Point. Aug. 14, 1932. p.19 #1444 Workmen loading holes with dynamite, in preparation for blast on cableway bench excavation. Aug. 15, 1932. p.19 #1442 "powder-monkeys" load dynamite cartridges with electric primers at isolated points. Aug. 15, 1932. p.19 #1493 Preparing for blast which demolished Lookout Point, to make way for cableway bench excavation. Aug. 14, 1932.
p.23 #1725 Close-up of upper portal of Diversion Tunnels No. 3 & 4, during preparations for blast. Nov. 13, 1932. p.23 #1728 Close-up of upper portals of Diversion Tunnels No. 3 and 4, showing flow in diversion tunnel No.4, shortly after blast. Nov. 13, 1932. p.23 #1733 Dumping materials at temporary pile bridge to complete diversion of Colorado River. Nov. 13, 1932. p.23 #1737 Upper portals of Diversion Tunnels No. 3 & 4, and temporary dyke, after diversion of Colorado River was completed. Nov. 26, 1932.
Pg.57 #2963 No.5 Intake Tower finished to Elevation 1232, showing curtain wall. Dec. 5th, 1934. Pg.57 #3009 Telephoto looking downstream into the Arizona Spillway, showing construction of the spillway bridge. Jan. 8th, 1935. Pg.57 #2980 Looking upstream at the upper end of No.1 plug, showing forms for the Intake Transition. Dec. 19th, 1934. Pg.57 #2977 Looking upstream into No.1 plug, showing the placing of the high pressure valves and method of pouring. Dec. 19th, 1934.
Pg.96 #3549 Looking south toward Boulder Dam Switchyard, showing construction and excavation. Nov. 26, 1935. Pg.96 #3531 Looking upstream in lower No.3 Plug. Note one of pipe sections in place. Nov. 25, 1935. Pg.96 #3551 Looking upstream along Nevada approach to Boulder Dam. Note rubble wall being built and excavation for tower footings. Nov. 26, 1935. Pg.96 #3534 Looking upstream in lower No.2 plug, showing pipe in place. Nov 25, 1935.
Pg.45 #2802 Looking downstream into the Arizona Spillway and No. 4 raise. Aug. 21st, 1934. Pg.45 #2803 Looking Downstream into No. 4 raise, showing the form work. Aug. 21st, 1934. Pg.45 #2794 Looking downstream from the Nevada side, toward the upstream face of Boulder Dam, showing the Spillways, Arizona Intake Towers and Cableways. Aug. 17th, 1934. Pg.45 #2825 Looking upstream in Upper No. 3 plug, showing pumpcrete and pipes. Aug. 25th, 1934.