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"# 623 View looking upstream from point near the Government water intake on the Nevada side. The lower portals of Diversion Tunnels Nos. 2, 3 and 4 are shown. The bridge in the foreground, in addition to being a footbridge, carries a...
2020-12-04
"#198 Drillers in top heading, tunnel No. S Arizona side. Sept. 10, 1231. #197 Muckers end Mucking Machine in 12 ft. x 12 ft. top heading tunnel No. 3. Arizona side. Sept. 10, 1931. "
2020-12-04
"#418-419 - Panoramic view of Lower Portals of Diversion Tunnels Kb. 1 and No. 2, taken from Arizona side, Portal of No. 2 Tunnel enlarged to full size. Compressor Plant No. 3 on the left, and boat landing in foreground, October 28, 1931. #425...
2020-12-04
"#64- Government Highway & Government Railroad, Boulder City to Damsite. August 7, 1931. #65- Highway (Government) Boulder City to Damsite. August 7th, 1931. #66 - Highway Grade by Six Companies above Damsite. Aug. 10, 1931. #67 -...
2020-12-04
"#289 The Anderson Mess Hall, Boulder City, Nevada - Sept. 27, 1931. #243 Anderson's Mess Hall, Boulder City, Nevada. North Wing Dining Room. Seat¬ing capacity 500 each wing. Sept. 24, 1931. #240 Anderson's Mess Hall,...
2020-12-04
"3335 Looking downstream, in the Nevada Valve House. June 24th, 1935. 3331 Looking upstream, on the Nevada side of Black Canyon, toward Boulder Dam, showing the road tunnel portal June 24th, 1935. 3318 View taken from the Valve House...

"2521 Forms in the upstream plug of Diversion Tunnel No. 2. January 27th, 1934. 2525 Placing concrete lining in Arizona upper penstock tunnel. January 27th, 1934. 2522 Forms in the upstream plug of Diversion Tunnel No. 3. January 27th,...

"3403 Looking upstream toward Boulder Dam and the Power House, from the lower portals road. August 26th, 1935. 3392 View taken from the top of Boulder Dam, looking down on the Power House, Valve Houses and lower portals. August 26th, 1935. "

"3423 Interior view of the Nevada Valve House, looking downstream. Note N-6 Emergency Gate being installed. August 27th, 1935. 3424 Nevada Valve House roof, looking upstream. Note the low strength pedestals and the double layer of...

"2847 Looking upstream at Boulder Dam and the Powerhouse, from the downstream cofferdam. September 27th, 1934 2853 Close-up of the Nevada Powerhouse, showing the draft tubes. September 27th, 2850 Nevada Powerhouse from...

"3450 President Roosevelt dedicating Boulder Dam. September 30th, 1935 3475 Nevada Intake Tower roofs. Note the concrete shingle arrangement. September 27th, 1935. 3479 View taken from the adit, showing No. 1 pour in the downstream...

"3171 Looking upstream toward Boulder Dam, from the lower portals road. Note the downstream cofferdam excavation. March 26th, 1935. 3157 General view, taken from the Nevada side, looking downstream on Boulder Dam. March 25th, 1935. 3151...

"2541 General view of Nevada Intake Towers from Arizona side, showing Lomix trestle below. February 20th, 1934. 2540 General view of Arizona Intake Towers and Spillway from Nevada Himix trestle. February 20th, 1934."

"2336 150-ton Government Cableway, completed and in operation. August 19th, 1933. 2326 Blending Plant, recently placed in operation, at the Himix Concrete Plant. August 18th, 1933. 2349 Hoover Dam, Cooling Tower and Refrigeration Plant,...

"2509 Close-up of Boulder Dam. View taken from the Arizona side, looking downstream. January 24th, 1934. 2512 Downstream face of Boulder Dam, showing foundations for Central Wing of the Power House. January 24th, 1934. 2514 Close-up of...

"2339 Hoover Dam, looking upstream. Railroad at Elevation 720 shown at left. August 22nd, 1933. 2345 Hoover Dam, looking upstream. Railroad at Elevation 720 shown at left. August 31st, 1933."

"2534 Boulder Dam, looking upstream. Cooling Tower in foreground. February 15th, 1934. 2560 General view of Boulder Dam, looking upstream. March 1st, 1934."

"2339 Hoover Dam, looking upstream. Railroad at Elevation 720 shown at left. August 22nd, 1933. 2345 Hoover Dam, looking upstream. Railroad at Elevation 720 shown at left. August 31st, 1933."

In 1931, Utah joined Six Companies Inc. to raise the surety required to bid for the Boulder (Hoover) Dam contract. One of the world’s largest dams, Hoover Dam was completed in 1936 at a cost of $49 million. These scrapbooks document through...

"1830 High scaling activities on the Arizona side, in connection with excavation of Arizona Valve House and Construction Adit Portal. December 21st, 1932. 1844 Arizona Valve House and Construction Adit Portal. January 6th, 1933."

"1725 Closeup of Upper Portal of Diversion Tunnels Nos. 3 and 4, during preparations for blast. November 13th, 1932. 1733 Dumping materials at temporary pile bridge to complete diversion of the Colorado River. November 13th, 1932. 1728...

"1687 Rip-Rapped Fills on Black Canyon Highway. October 25th, 1932. 1717 Cutoff Trench at Upper Cofferdam, looking towards cliff from dike. October 31st, 1932. 1700 Operations on Arizona rim of Canyon, taken from Old Observation Point....

"1524 Nevada Spillway, looking upstream. August 29th, 1932. 1525 Nevada Spillway, looking downstream. August 29th, 1932. 1527 Crew drilling in Nevada Inclined Spillway Tunnel, leading down into Diversion Tunnel No. 1. August 29th, 1932."

"Deadwood Dam" Completed Npv. 10/30 # 1.00 By Geo R. Nock

The 1963-64 Lake Mead survey was run to compute the reservoir capacity. Results of the geodetic and hydrographic surveys and sediment sampling equipment are described. The geodetic survey showed Hoover Dam subsided an average of 118 mm since 1935....
1970-08-01
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