p.5 #948 Foundations for the trash rack structure being installed in front of upper portal of Diversion Tunnel no.2. This is where the first pay concrete was poured. Mar. 7, 1932. p.5 #943 View of gravel plant, showing live storage of screened aggregate and sand in foreground. Storage pile for raw aggregate in background. Mar. 2, 1932. p.5 #951 Upper portals of Diversion Tunnels No.1 and 2. Note workmen scaling above portal of Diversion tunnel No.1. Mar. 7, 1932. p.5 #937 Night view of gravel plant, taken near first scalping screen, and looking in opposite direction than the view on left. Feb. 26, 1932.

p.7 #969 First-aid station and ambulance located at river camp above upper portals. Similar hospital is maintained at lower portals. Mar, 8, 1932. p.7 #918 Interior of one of many drill sharpening stations, showing forge and Ingersoll-Rand drill sharpener. Feb. 15, 1932. p.7 #974 Caterpillar 60 with bull-dozer in front and cow-dozer aft, used extensively for moving muck. Mar. 8, 1932. p.7 #946 Two levels of highway which will cross top of the dam. Note the rubble stone masonry retaining wall. High-level concrete mixing plant will be located in the draw in foreground. Mar. 2, 1932.

p.18 #1131 Detail picture of side-wall "jumbo" used in placing 3ft. thick lining in diversion tunnels. Side wings are jacked into place, and concrete is poured thru ports by a traveling crane and 2yd. buckets. Apr. 18, 1932. p.18 #1202 First "jumbo" for pouring concrete lining in top or arch section of tunnels was erected on "beach" in front of tunnel No.2 and transported across river in sections by cableway. May 20, 1932. p.18 #1132 This view and No.1131 show forms set for first side-wall pour in upper portal of tunnel No.3. Form is 80 feet long and consists of four 20ft. sections bolted together. Note size of man in upper right. Apr. 29, 1932.

p.21 #1506 Blast on Cableway bench excavation, on Arizona side, above dam site. Picture taken from lower portal of Railroad Tunnel No.1. Aug. 24, 1932. p.21 #1457 Picture of blast at same place shown above, taken from opposite, on Black Canyon Highway. Aug. 16, 1932. p.21 #1507 Huge billows of rock and dust pour over canyon rim and descend to river below. Aug. 24, 1932. p.21 #1456 Blast on Arizona intake tower excavation, which has filled canyon with smoke and dust. Upper steel suspension bridge shown in background. Aug. 16, 1932.

Pg.30 #2638 Interior view of Poser House block A-7, showing reinforcing steel and pipe layout. April 25th, 1934. Pg.30 #2634 View of Poser House block No. A-7, from the lower Arizona construction unit, showing form work and pouring arrangement. April 25th, 1934. Pg.30 #2660 Looking upstream in Black Canyon, showing general view of the Power House layout, taken from the Nevada Valve House bench. April 28th, 1934. Pg.30 #2629 General view of Himix and Cement Blending Plants, with unloading track and aggregate bins above. April 17th, 1934.