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Aerial view of construction on the top of Hoover Dam Aerial view of construction on the top of the Hovoer Dam. Construction workers watch as a concrete pouring bucket, seen on the left side of the picture, is hoisted over the site. The Arizona intake towers are visible in the...
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Construction workers on the drum gates in the Arizona spillway Two construction workers standing on a suspended scaffold work on the drum gates on the Arizona spillway.
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Construction on the Nevada spillway View of construction on the Nevada spillway in Black Canyon. An electric dragline is seen on a trestle in front of the spillway.
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Aerial view of the Hoover Dam construction site viewed from downstream on the Colorado River Aerial view of the Hoover Dam construction site taken from downstream on the Colorado River in Black Canyon. Construction on the Nevada and Arizona power houses is shown in the foreground in the cofferdam. Concrete pouring forms cover the top...
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Construction on the no. 4 penstock raise Close-up of framework inside the unfinished opening of a penstock tunnel. Construction workers can be seen in the foreground on what appears to be a transportation track.
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Construction on the Arizona spillway View of construction on the Arizona spillway in Black Canyon. An electric dragline can be seen at the top left of the dirt road above the spillway. Construction on one of the penstock tunnels can be seen inside the spillway.
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Construction on the no. 4 penstock raise View of construction workers on framework inside the no. 4 penstock tunnel portal during construction of Hoover Dam.
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Construction on the four intake towers in Hoover Dam View from the Arizona side of the Hoover Dam construction site of work on the four intake towers. Steel framework rises from the top of each intake tower. Part of the Nevada spillway is seen in the upper right. Construction...
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Construction on the Nevada and Arizona power houses in the downstream cofferdam below Hoover Dam View from the downstream cofferdam of the Hoover Dam construction site. Construction workers, temporary buildings, electric draglines, vehicles and other construction equipment are seen in the cofferdam. Framework rises from the tops of the power houses on both sides of...
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Close-up of the Nevada powerhouse, showing the draft tubes. Close-up of construction on the Nevada powerhouse. Construction workers stand amid piles of lumber on the ground. Wood and steel framework is seen at the top of each draft tube in the power house.
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Construction on the Nevada power house viewed from the Arizona valve bench View of construction on the Nevada power house seen from the Arizona valve house bench. Framework rises from the top of the power house. Temporary buildings can be seen in the cofferdam in front of the power house. Part of...
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Construction on the Arizona power house viewed from the Nevada valve house bench View of construction on the Arizona power house seen from the Nevada valve house bench. Framework rises from the top of the power house. Temporary buildings, construction equipment and vehicles can be seen in the cofferdam in front of the...
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Construction on the Arizona spillway and the no. 4 penstock raise in Black Canyon View of construction on the Arizona spillway and the no. 4 penstock raise. Black Canyon surrounds the construction site. An electric dragline and trucks are seen on the dirt road above the spillway.
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Aerial view of the Hoover Dam construction site in Black Canyon showing the upstream dam... Aerial view of the Hoover Dam construction site in Black Canyon showing the upstream dam face, which has concrete pouring forms on the top of it, the Arizona and Nevada spillways, and the unfinished Arizona intake towers. The Colorado Rivers...
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Construction in the no. 4 penstock raise View of construction inside the no. 4 penstock raise. Construction workers stand on the framework and platforms inside the unfinished tunnel.
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Construction inside the upper no. 3 plug Construction inside the upper no. 3 plug showing framework, pipe sections and a pumpcrete used for pumping concrete.
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Aerial view of the Hoover Dam construction site looking upstream on the Colorado River Aerial view of the Hoover Dam construction site looking upstream on the Colorado River in Black Canyon. Construction on the power houses in the lower cofferdam is seen in the foreground. The roof of a temporary building is seen in...
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Construction in the no. 1 penstock raise View of construction work inside the portal of the no. 1 penstock raise. Construction workers can be seen on the framework outside of the portal.
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Construction on the Arizona intake towers View of construction on the Arizona intake towers. Steel framework protrudes from the tops of the towers. A derrick crane is seen above the towers, and the Arizona spillway is visible in the background. Part of the dam face, covered...
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Construction on the Nevada intake towers View of construction on the Nevada intake towers. Steel framework protrudes from the tops of the towers. Concrete pouring buckets can be seen on the rarilroad bench below the towers. Derrick cranes can be seen in the canyon walls above...
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Close-up of formwork in the Arizona power house Construction workers are seen working amid the wood and steel framework during construction of the Arizona power house. Unfinished penstock tunnel portals can be seen in the canyon wall in the background.
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Night photograph of power house construction. Night view of the Hoover Dam construction site viewed from the lower cofferdam. Electric lights illuminate the dam face, the canyon walls and construction on the Nevada and Arizona power houses below. Temporary buildings are seen in the foreground on...
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Construction on the Nevada power house 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...
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Construction on the Arizona power house View of construction on the Arizona power house. Wood and steel framework surround the site. Part of the dam face is seen in the upper left. Construction workers, equipment and temporary buildings are seen in the cofferdam between the Nevada...
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Looking upstream toward Hoover Dam, during construction Shows Hoover Dam construction from Lookout Point. The intake towers and the Colorado River are visible above the dam. The power houses are being constructed on the floor of the canyon. Also shows trams on cableways stretched...
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Night photo of Hoover Dam, during construction Shows Hoover Dam at night, lit by electric lights, during construction period. The intake towers rise behind the dam. A cableway stretches across the top of the canyon. The power houses are visible at the base of...
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Looking downstream on the Hoover Dam construction site This view, taken from the Nevada side of the canyon, shows the lower cofferdam being excavated. Trucks, buildings, , and construction roads are visible. The Colorado River can be seen below the site. There is a temporary...
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Upstream face of Hoover Dam, during construction View of Hoover Dam construction from the Arizona side of the canyon. The upstream face of the dam is visible. The intake towers are nearing completion. Temporary bridges, scaffolding, a train trestle, and trams traveling across...
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View of Hoover Dam during construction View of Hoover Dam construction site with the intake towers and Colorado River visible above. The power houses are under construction at the base of the dam. A cable spans the canyon and several construction buidngs are shown....
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Top of Hoover Dam, during construction View of Hoover Dam construction from the top of the dam looking toward the Arizona side. A spillway and intake towers are visible in the background. Concrete pouring forms are shown with construction people at work. Hoisting...
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Top of Hoover Dam, during construction 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...
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Nevada intake towers, Hoover Dam construction site View of the Nevada intake towers during construction. The photo was taken from the Arizona side of the canyon and shows suspended temporary bridges, a railroad track and cars on the side of the canyon, a trestle, and...
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Construction view of Hoover Dam, looking downstream A view, looking downstream, of the spillways and intake towers during the construction of the dam. Temporary bridges and cables with trams span the canyon. Various buildings, a trestle, and construction roads can also be seen.
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Hoover Dam during construction View of Hoover Dam during construction, showing the power houses. Various buildings and structures are visible as well as concrete forms and hoisting machinery. There is a cable stretched across the canyon.
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View of the power house and valve houses from top of Hoover Dam View of the power house and valve houses from the top of the dam. Various buildings and structures can be seen as well as concrete forms. There are construction roads below the dam and a temporary bridge spans...
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View of bridge across Hoover Dam during construction View, looking toward Arizona intake tower control house, of construction workers placing concrete forms for pouring on the bridge. There are workers standing on top of the control house, too. A crane can be seen in...
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Upstream face and intake towers of Hoover Dam during construction View taken from the Arizona side showing the intake towers and upstream face of the dam during construction. Various buildings are visible as well as hoisting machinery and a railroad snaking along the upper canyon. Cables span the...
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View of a spillway bridge during construction of Hoover Dam 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.
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View of Arizona spillway during construction A telephoto view of the Arizona spillway during the construction of Hoover Dam. Shows the bridge and control house. Trucks, various buildings, and some construcion workers are visible. Cables are overhead and construction roads snake up the...
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View of Nevada spillway during construction of Hoover Dam Telephoto view from above looking into the Nevada spillway. The control house is being formed. There are various buildings and structures and trucks in the picture. Also shows hoisting machinery.
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Memorial Day exercises at Hoover Dam Shows the Memorial Day exercises at Hoover Dam during which the plaque commemorating the men who gave their lives in the construction of Hoover Dam was unveiled. There is a crowd of people gathered with others looking over the...
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Hoover Dam during construction, from the Nevada side Shows the dam from the Nevada side. The completed road, parapets, and intake towers are visible. One of the spillways can be seen in the background. There are trucks and people on the new road.
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Final pour in the slot, Hoover Dam Shows construction workers making the final pour in the slot. Several men are working, the others supervising. A truck and cement mixer are visible. In the bakcground a portion of an intake tower can be seen.
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Building of intake tower, Hoover Dam site Shows construction men working on an intake tower and bridge. They are lowering the trashracks into their respective slots. Also shows a crane and hoisting machinery. Cables cross overhead.
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Hoover Dam, looking downstream View of Hoover Dam, looking downstream from the Arizona side. Several buildings and structures are visible as well as an observation point at the left. Shows the intake towers and also Lake Mead (Hoover Dam reservoir). The...
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Hoover Dam under construction 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.
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Arizona Black Canyon highway consruction Shows consruction equipment used to build the highway through Black Canyon on the Arizona side of the dam. Railroad tracks can be seen alongside the new road with a dragline on the tracks. There are mountains in the...
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Switchyard control circuit tunnel under construction -- Hoover Dam site Shows construction work on the switchyard control circuit tunnel. Various structures are visible, as well as roads, and automobiles. A power shovel is excavating. In the foreground is the power sub-station. The Babcock and Wilcox Company...
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Hoover Dam construction, looking down on top Shows construction workers and equipment on the top of Hoover Dam.. They are building the roadway across the dam. Trams on cableways and intake towers can be seen in the background. A bucket is pouring the roadway...
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View of valve house under construction -- Hoover Dam Telephoto view of the Arizona valve house under construction, taken from the Nevada side of the canyon. Some buildings and structures as well as cables and railroad tracks are visible.
 

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