p.13 #1219 Interior of Diversion Tunnel No.3, near upper portal. Invert and side wall sections of three-feet thick concrete lining have been poured. Jun. 2, 1932 p.13 #1289 Interior of Diversion Tunnel No.3, showing method of pouring alternate slabs in side wall section of tunnel lining. Lining form is shown in background. Jun. 22, 1932. p.13 #1220 Interior of Diversion Tunnel No.2, near upper portal. Invert and side wall sections of lining have been completed. Two cubic yard buckets for pouring concrete are shown on truck. Jun. 2, 1932. p.13 #1273 Detail pic, showing method of construction and operation of side-wall jumbo for placing lining in diversion tunnels. Jun. 29, 1932.

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.

Pg.93 #3467 Looking downstream from Nevada side, showing Boulder Dam, Spillways, Intake Towers, etc. Note general clean-up and road work; also, Intake Tower lanterns in place. Sept. 27, 1935. Pg.93 #3471 Looking upstream toward Nevada Spillway Drainage Flume, and general area. Sept. 27, 1935. Pg.93 #3464 Looking downstream toward Arizona Spillway. Note general road work, curbs in place and guard rails being installed. Sept. 26, 1935. Pg.93 #3465 From Arizona Spillway Gate House, looking upstream. Note float well supply line finished and construction on upstream abutment wall. Sept. 9, 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.