People sit and relax on the Desert Inn Charter Boat in front of the Hoover Dam.

A view of an unidentified man working on the canyon floor at the Hoover Dam construction site.

Pg.66 #3136 Close-up of the Arizona Intake Towers - No.6 on left, No.3 on right. Note the forms for the dome of Intake Tower No.6. March 4th, 1935. Pg.66 #3133 View from the Arizona Spillway bridge, looking downstream into No.4 raise, showing general construction methods. Feb. 25th,1935. Pg.66 #3120 Looking downstream from the Arizona side, showing Boulder Dam, the Intake Towers and general layout. Note the dome formed on one of the Intake Towers. Feb. 25th, 1935. Pg.66 #3139 The run-around excavated in the old top heading adit, to facilitate handling concrete for No.4 Plug. March 4th, 1935.

Pg.75 #3293 View from the Nevada Utility Tower of Boulder Dam, showing the Memorial Day exercises in connection with the unveiling of the plaque commemorating the men who gave their lives in the construction of Boulder Dam. May 30, 1935. Pg.75 #3287 On crest of Boulder Dam, looking toward the Nevada side, showing final pour in the slot, which practically completes the concrete in Boulder Dam. May 29, 1935. Pg.75 #3298 View of Boulder Dam, from the Nevada side. The road, towers, and parapets are completed. June 1, 1935. Pg.75 #3282 Looking upstream at No.6 Intake Tower Top. Note the method of lowering the trash tracks into their respective slots. May 27, 1935.

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.