p.23 #1725 Close-up of upper portal of Diversion Tunnels No. 3 & 4, during preparations for blast. Nov. 13, 1932. p.23 #1728 Close-up of upper portals of Diversion Tunnels No. 3 and 4, showing flow in diversion tunnel No.4, shortly after blast. Nov. 13, 1932. p.23 #1733 Dumping materials at temporary pile bridge to complete diversion of Colorado River. Nov. 13, 1932. p.23 #1737 Upper portals of Diversion Tunnels No. 3 & 4, and temporary dyke, after diversion of Colorado River was completed. Nov. 26, 1932.

Pg.24 #2558 General view of Himix, including Blending Plant silos at left rear of picture. March 1st, 1934. Pg.24 #2543 Looking downstream in lower No. 2 plug, showing form work. Feb. 20th, 1934. Pg.24 #2542 Excavation for bridge abutment in Arizona Spillway. Feb. 29th, 1934. Pg.24 #2539 Close-up of Cooling Pipe Layout in Panel H-3. Feb. 20th, 1934.

Pg.57 #2963 No.5 Intake Tower finished to Elevation 1232, showing curtain wall. Dec. 5th, 1934. Pg.57 #3009 Telephoto looking downstream into the Arizona Spillway, showing construction of the spillway bridge. Jan. 8th, 1935. Pg.57 #2980 Looking upstream at the upper end of No.1 plug, showing forms for the Intake Transition. Dec. 19th, 1934. Pg.57 #2977 Looking upstream into No.1 plug, showing the placing of the high pressure valves and method of pouring. Dec. 19th, 1934.

Pg.58 #2993 Form work on the Nevada Valve House bench. Jan. 2nd, 1934. Pg.58 #2971 Telephoto view of Nevada Powerhouse units. Dec. 19th, 1934. Pg.58 #2995 Arizona Valve House from the center of the low catwalk. Jan. 2nd, 1935. Pg.58 #2973 Telephoto view of Arizona Powerhouse units. Dec. 19th, 1934.

Pg.94 #3476 Looking upstream in Nevada Valve House. Note installation of needle valves and gates. Sept. 27, 1935. Pg.94 #3478 Looking upstream, on roof of Nevada Valve House. Steel rails in place, ready for pouring concrete slab. Sept. 27, 1935. Pg.94 #3473 Looking into Arizona Spillway Raise. Jumbo is being used for grouting, back of concrete lining. Sept. 27, 1935.

Pg.17 #2509 Close-up of Boulder Dam. View taken from the Arizona side, looking upstream. Jan. 24th, 1932. Pg.17 #2514 Close-up of slot at the Upstream Face of Boulder Dam. Jan. 24th, 1934 Pg.17 #2512 Downstream face of Boulder Dam, showing foundation for Central Wing of the Power House. Jan. 24th, 1934. Pg.17 #2510 Upstream face of Boulder Dam. Jan. 24th, 1934.

Pg.95 #3553 View from the crest of Boulder Dam, looking downstream toward the Power House and lower portals of Diversion tunnels. Nov. 26, 1935. Pg.95 #3527 Boulder Dam and Power House, looking upstream from Nevada side. Note reservoir and Fortification Hill in background. Nov. 23, 1935. Pg.95 #3545 View from reservoir, looking downstream at Boulder Dam and Intake Towers. Nov. 26, 1935.