p.17 #1142 Marion type of 125 electric dragline with 5 cu. yd. bucket loading into 30 cu. yd. side dump cars at gravel pit. Mikado type locomotives pull 10-car trains, 3 trains of this type in operation. May 3, 1932. p.17 #1198 As protection against high water, a "bridle" has been attached to upstream face of gravel pit bridge. A 3-in. cable is anchored to concrete dead-men and horizontal stays are attached to bents on bridge. May 15, 1932. p.17 #1144 Ten car train of gravel crossing 1100 ft. trestle bridge and bound for screening plant. Round trip take slightly over two hours. May 3, 1932 p.17 #1193 Locomotive equipment of Six Companies Inc. on yard at gravel plant. May 15, 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.

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.