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Night shot of construction; June 19, 1934
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Making sound movies of the Colorado River near the damsite;
September 16, 1930
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Excerpt from Memorandum for the press announcing construction
has started; July 7, 1930
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Longitudinal Section, pamphlet “The Story of Hoover Dam;”
1961
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First train load of gravel arriving at screening plant; January
9, 1932
John F. Cahlan
Oral History |
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Gravel train crossing a trestle on the way to the dam; May 3,
1932
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Memorandum for the press concerning bidding companies; March
4, 1931
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Bureau of Reclamation signs contract with Six Companies, Inc
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Department of Interior Permits for Boulder City; May 15, 1931
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Contour map of Hoover Dam; 1930
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Barges first used to transport materials across river; Sept.
1931
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Safety signs put up by the insurance company; August 9, 1931
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Blasting early in morning; Aug. 6, 1932
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Blasting for Arizona intake towers; Aug 6, 1932
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High scalers
John F. Cahlan Oral History |
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Carl Merrill Oral History
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Jackhammer men drilling open cut excavation; November 29, 1931
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Men drilling face of tunnel; September 10, 1931
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Electric shovel at mouth of diversion tunnel; March 7, 1932
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Interior of the diversion tunnel; March 8, 1932
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Water flowing into diversion tunnels; November 13, 1932
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30 head drill jumbo; January 28, 1932
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Driving a Caterpillar tractor; March 28, 1932
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Gravel screening plant; March 2, 1932
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Train at concrete mixing plant; April 17, 1934
John F. Cahlan Oral History |
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Head towers for cableway; Nov. 24, 1932
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Fixing the cable crane; April 1, 1932
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Head tower from No. 8 cableway; Nov. 24, 1932
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Tail towers No’s 7 & 8 cableways; Nov. 29, 1932
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High scalers; Aug 31, 1932
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Arizona intake tower derricks; Dec. 27, 1933
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General condition of river bottom after diversion; November
29, 1932
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Marion Allen Oral History
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Trucks excavating in river bed; April 3, 1933
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Upper cofferdam; December 20, 1932
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Pouring forms; September 14, 1933
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Two ton railroad trailer
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Pouring the first concrete; June 6, 1933
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Cooling pipes in concrete; February 20, 1934
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Profile of Hoover Dam, “The Construction of Hoover Dam,”
Wilbur M. Mead, published by Department of Interior; 1933
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Bottom row of concrete forms; June 27, 1933
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Mid-level progress on the dam; August 31, 1933
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Mid-level progress on the dam; April 1, 1934
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3/4 level progress on the dam; August 31, 1934
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Pouring on dam nearly complete; January 28, 1935
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Aerial shot of dam; June 4, 1935
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Section of pipe in transit to site; 1934
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Intake pipe section being lifted from trailer; July 20, 1932
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Crane picking up section of pipe; 1934
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Penstock pipe in fabrication shop; 1934
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Pouring the 2 millionth cubic yard of concrete for the dam;
June 2, 1934
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The final batch of concrete poured on the dam; May 29, 1935
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All four intake towers and three derricks; Sept. 27, 1934
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Intake towers; March 26, 1935
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Frank Crowe turns over the dam to the government; 1935
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Looking upstream toward Boulder Dam and power house; Sept 26,
1934
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National
Archives and Records Administration