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851 - 875 of 1090 Items << < 30 31 32 33 34 35 36 37 38 39 > >>
851 - 875 of 1090 Items << < 30 31 32 33 34 35 36 37 38 39 > >>
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"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...
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"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...
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"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...
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"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."
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"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,...
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"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...
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"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."
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"2534 Boulder Dam, looking upstream. Cooling Tower in foreground. February 15th, 1934.
2560 General view of Boulder Dam, looking upstream. March 1st, 1934."
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"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."
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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...
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"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."
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"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...
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"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....
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"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."
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In Nov 1967, a Deep Water Isotopic Current Analyzer (DWICA) was used to study current patterns in the Boulder Basin of Lake Mead to determine if low-quality water from Las Vegas Bay might enter the Southern Nevada Water Project intake on Saddle...
1971-10-01
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A pamphlet print March, 1925 for distribution to all Los Angeles water and electric consumers regarding the potential for the Colorado River to provide water and hydroelectric power to Southern California.
1925-03-01
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A press release printed March 13, 1931 for distribution to Southern California weeklies and dailies regarding the interaction between the Boulder Dam and the Colorado River Aqueduct construction.
1931-03-13
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Map of the Colorado River Basin below Boulder Dam.
2024-04-25
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'F.V. Owen, publisher ... Los Angeles, California. Topography by C.H. Fenner, C.E. Decorations by L.J. Bergère. Gov't. data, H.A. Shamberger, C.E. Copyright, 1930, by F.V. Owen.' At bottom right of map: 'Dated Oct. 7th, 1930.' Relief shown by...
1930-10-07
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Pamphlet discussing whether or not Hoover Dam should be built and the allocation of Colorado River water and of the power that the dam would produce. Contains several maps.
2024-04-25
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Aerial view of Hoover Dam and the surrounding area showing Lake Mead (the reservoir). The intake towers are visible behind the dam and watr is flowing from the outlet works.
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View of Hoover Dam and the Colorado River in Black Canyon. Water is being discharged from the outlet works of the Arizona valve house on the right. The peaks of the intake towers can be seen behind the dam face. Fortification Hill is seen in Black...
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View of water being discharged into the no. 1 diversion tunnel. A series of bundled pipes is visible on the right side of the tunnel wall.
1935-03-26
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This photo shows trucks and equipment used for hauling and pouring concrete to form the invert lining in a diversion tunnel at Hoover Dam. Also shows some construction workers.
1932-04-11
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