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826 - 850 of 1090 Items << < 29 30 31 32 33 34 35 36 37 38 > >>
826 - 850 of 1090 Items << < 29 30 31 32 33 34 35 36 37 38 > >>
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"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 30th, 1935.
3298 View...
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"2919 Boulder Dam, looking upstream from Lookout Point. November 2nd, 1934.
5 Top of Boulder Dam, looking toward the Arizona side. Arizona Spillway and Intake Towers in Background.
October 17th, 1934.
2883 Looking toward the Arizona...
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"1774 Head Tower for No. 8 Cableway showing counterweight, hoist resistor assembly and travel track arrangement. November 29th, 1932.
1785 Looking upstream in Black Canyon, from Lower Portals, showing Lower Cofferdam site and general...
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"1823 General view of progress on the High Mix concrete Plant, and Head Tower for No. 9 Cableway. December 20th, 1932.
1841 High Mix concrete plant and Head Tower for No. 9 Cableway. January Jth, 1933.
1846 Lower Portals of the Diversion...
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"2175 Excavating in the prehistoric bed of the Colorado River. April 30th, 1933.
2143 View of the Arizona Spillway. April 21st, 1933.
2173 Government 150-ton Cableway and Blending Plant. April 29th, 1933.
2126 Weir section...
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"1539 Crew of Highscalers stripping Canyon Wall. August 31st, 1932.
1598 Erecting Sidewall Jumbo at Upper Portal of Diversion Tunnel No. 1. September 10th, 1932."
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"1355 Workmen loading out for the canyon on the day shift in front of Six Companies Inc. mess hall. Dormitory shown in the background. July 20th, 1932.
1356 Transport trucks holding 48 men used for hauling workman to and from the canyon...
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"1541 Lower Portals of Diversion Tunnels No. I and No. 2, during flash rise in the River. August 31st, 1932.
1542 Lower Portals of Diversion Tunnels No. 3 and No. 4, during flash rise in the River. August 31st, 1932.
1546 Closeup of Lower...
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"1630 Bulkhead Gate during construction at Upper Portal of Diversion Tunnel No. 1. September 22nd, 1932.
1632 Bulkhead Gate during construction at Upper Portal of Diversion Tunnel No. 1. September 28th, 1932.
1635 Bulkhead Gate construction...
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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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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.
2024-04-30
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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.
2024-04-30
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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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Construction workers are operating machinery (agitators) which dump concrete into buckets. Location is the interior of a diversion tunnel at the Hoover Dam construction site.
1932-03-23
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Construction workers are using a power shovel and trucks to open up an adit as part of the construction of Hoover Dam.
1932-03-18
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Memoranda, including "Welding details which can cause high stress concentrations," "Technical Memorandum No. 319 - Comparison of Penstock Theory and Model Test Results," "Moment and Shear due to a Concentrated Load near the Edge of a Slab,"...
2016-03-10 2016-03-10 |
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Speech for unveiling of a plaque at Hoover Dam commemorating the dam's 40th anniversary and the bicentennial of the American Revolution
1976-10-26
2007-01-02 2007-01-02 |
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Correspondence and memoranda, including "Required Experimental Data on Earthquake Ground Motion," "Program Evaluation - Seismological Field Survey," "Special meeting on April, 1955," "Earthquake Laws in the United States," "Use of Intensity...
2016-03-10 2016-03-10 |
