Pg.92 #3450 President Roosevelt dedicating Boulder Dam. Sept. 30, 1935. Pg.92 #3479 View taken from adit, showing No.1 pour in downstream No.2 diversion tunnel plug. Cribbing for use as temporary pipe supports. Sept. 27, 1935. Pg.92 #3475 Nevada Intake Tower roofs. Note concrete shingle arrangement. Sept. 27, 1935. Pg.92 #3472 View of Switchyard, showing control house, foundations and general excavation. Sept. 27, 1935.

p.3 #888 Lower portals of Diversion tunnels No.3 and 4 during flood. Feb. 10, 1932 p.3 #896 Bucyrus Erie 43-B gas-air shovel was the only piece of equipment caught by the flood. Feb. 10, 1932. p.3 #884 Looking across river at lower portal of Diversion Tunnel No.3. Feb 10, 1932 p.3 #897 Looking across river from Arizona side at upper portals of diversion tunnels No.1 and 2. Truck bridge in foreground has been partially washed out. Feb. 10, 1932.

p.9 #1011 Marion electric shovel with 3 1-2 cubic yard rock dipper loading into White 8 cubic yard truck, at Nevada spillway cut. Mar, 18, 1932. p.9 #1014 Mack truck with 14 cubic yard body being loaded at Nevada Spillway cut. Five similar trucks being used on this operation. Mar. 18, 1932. p.9 #1004 White truck dumping near site of Nevada spillway cut and extending road the for muck disposal. Mar. 16, 1932.

p.10 #1016 Gantry crane used in pouring concrete in invert section of upper Diversion Tunnel No.3. Mar. 18, 1932. p.10 #1019 View showing method of pouring concrete in invert section of tunnel lining. Mar. 18, 1932. p.10 #1018 view of invert forms in upper Diversion Tunnel No.3 showing method of pouring slabs. Trimming jumbo for aligning gauge of tunnels in background. Mar. 18, 1932. p.10 #1020 First 40 foot slab of concrete poured in lining diversion tunnels. Mar. 18, 1932.

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.

Pg.14 #2457 Two-hundred ton two-way trailer, for transporting sections of 30 ft. penstock pipe. Dec. 15th, 1933. Pg.14 #2460 View of 200-ton two-way trailer, with test load. Dec. 15th, 1933. Pg.14 #2481 Excavation for Downstream Plug, Diversion Tunnel No. 3. Dec. 29th, 1933. Pg.14 #2485 Excavation for Downstream Plug, Diversion Tunnel No. 3. Dec. 29th, 1933.

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.