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101 - 125 of 1090 Items << < 1 2 3 4 5 6 7 8 9 10 > >>
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Color transparency (aerial view) of Hoover Dam and Lake Mead. Part of the Colorado River is also visible.
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Aerial view of the Hoover Dam, nearing completion, in Black Canyon. Visible are the dam face, intake towers and spillways, and the Nevada valve house is seen in the middle left. The Colorado River is seen upstream of the dam. The roadway crossing...
1935-06-04
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View of the Hoover Dam construction site in Black Canyon, showing the nearly-completed dam face and construction on the power houses in the lower cofferdam. Concrete pouring forms are seen on the tops of the power houses. Temporary buildings,...
1935-03-26
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View of the Nevada side of the Hoover Dam construction site, showing a road tunnel portal in the wall of Black Canyon on the left. The dam face and construction on the Nevada power house can be seen in the upper right. Temporary structures and a...
1935-06-24
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A night view of water spewing from the outlet works at Hoover Dam before the dam was completed. Electric lighting illuminates the scene. A man is leaning on the edge of the wall, peering into the water below.
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Night view of the construction of an intake tower at Hoover Dam. Electric lights illuminate the scene and hoisting machinery is visible.
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View from the downstream cofferdam of construction on the Arizona power house. Concrete pouring forms and steel framework stand on top of the power house foundation. The dam face and wall of Black Canyon can be seen in the background. Temporary...
1935-01-28
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Interior view of the Nevada valve house. Construction scaffolding surrounds the installation of the needle valves and gates. Two construction workers can be seen in the rear at an unfinished opening to the valve house.
1935-09-27
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Shows the power house and valve houses in a photo taken from the top of Hoover Dam. Buildings and concrete pouring forms are visible.
1935-08-26
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View through diversion tunnel no. 3 showing concrete plug poured to close the tunnel. On the upper left another tunnel angles into the main tunnel. Mud and debris coat the tunnels.
1934-05-25
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View from the bottom of the canyon looking upstream at the dam and the power house. Trucks, lumber, and a cable spanning the canyon are visible. Pieces of lumber are piled around the site.
1935-10-28
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Taken from high up, this photo shows the Arizona spillway, highway bridge, and Arizona highway. Mountains and roads can be seen in the background. Buildings, cables, and various types of construction equipment are shown.
1935-07-25
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Shows the road approaching Hoover Dam from the Nevada side and the top of the dam during construction. Note the rubble wall being built and excavation for tower footings. Trucks, hoisting machinery, and cables with trams are visible. The intake...
1935-11-26
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An expansive view of the upstream face of Hoover Dam during construction. Various buildings and structures, workers, cars and equipment can be seen. Hoisting machinery and concrete pouring forms can be seen also.
1935-02-25
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Shows the interior of a power house cable gallery during the construction of Hoover Dam. It is illuminated with electric lighting.
1935-04-10
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Center of image shows two Arizona intake towers under construction. Right hand tower is more complete than left hand tower, which is just beginning to take shape. A crane is positioned above and between the towers. In right forground can see...
1934-04-27
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Shows the face of the dam with construction going on on the intake towers and the power houses. Also shows cableways and mountains behind dam.
1934-12-03
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Shows the reinforcing framework for the Arizona power house and the locations for the turbine rooms, front room galleries, and penstocks. Some buildings, trucks, tunnel openings, and construction workers are visible.
1934-10-30
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Aerial view of the downstream side of Hoover Dam showing the intake towers and spillways. Construction equipment, buildings, and roads are visible. There are some cars on the road crossing the dam.
1935-06-01
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View looking under the Arizona spillway bridge as it is being constructed. A train car is silhouetted under the bridge and various pieces of construction equipment are visible, including cables, hoisting machinery and scaffolding.
1935-03-26
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View of the top of Hoover Dam during construction with intake towers and a spillway in the background. A temporary bridge and cableway with trams span the canyon. Construction workers are on top of the dam, working with the concrete.
1934-10-17
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View of construction on the Nevada power house. The dam face is seen in the upper right. Unfinished penstock portals are seen in the canyon wall. Temporary buildings and construction equipment are seen in the cofferdam between the Nevada and...
1934-06-21
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View of construction inside the no. 4 penstock raise. Construction workers stand on the framework and platforms inside the unfinished tunnel.
1934-08-21
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View of construction workers on framework inside the no. 4 penstock tunnel portal during construction of Hoover Dam.
1934-09-27
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Construction workers supervise the lifting of a 30-foot section of penstock pipe from a trailer by a cableway in the Hoover Dam construction site.
1934-07-20
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