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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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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 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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Valve house under construction -- Hoover Dam Telephoto view of the Nevada valve house under construction, taken from the Arizona side of the canyon. Railroad tracks, various buildings, and cables are visible on the side of the canyon.
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Intake towers during construction of Hoover Dam Close-up view of the construction of the Arizona intake towers showing forms for the dome of the tower on the left, which is no. 6. Construction workers are on the very tops of the towers doing concrete work. ...
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Hoover Dam during construction, looking downstream Shows Hoover Dam during construction, looking downstream. The intake towers are nearly finished. Shows dome on one of the intake towers. Roads, buildings and structures, railroad trestles and cableways are visible.
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Hoover Dam construction -- looking into a raise Shows construction, looking downsteam into no. 4 raise from the Arizona spillway bridge at Hoover Dam.
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Construction at Hoover Dam, inside a tunnel Shows construction workers deep inside a tunnel at the Hoover Dam site. The scene is lit with electric lights and a railroad track is visible.
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View of no. 1 plug showing the arch and raise Shows the concrete pouring forms and the gunited portions of the arch and raise that goes into the Nevada spillway. Also shows construction equipment and construction workers.
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Number 3 plug and raise Number three plug and raise with the plug concrete in place. Also shows construction equipment.
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Hoover Dam valve house under construction Shows the Arizona valve house being built. Construction equipment, buildings, cables and high scaling equipment are visible on the side of the canyon.
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Hoover Dam valve house under construction Shows the Nevada valve house being built at the Hoover Dam site. Note the forms for the roof beams being built. Buildings, construction equipment, bridges, and cables are visible.
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Hoover Dam power house under construction Shows a power house at Hoover Dam being built. Note the Universal crane on top. The girder on the flat car has just been lowered by means of the government cableway. This photo was taken from the Nevada...
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View of no. 4 plug, Hoover Dam site Shows work on the no. 4 plug inside a diversion tunnel at the Hoover Dam site. Electric lights illuminate the scene and construction equipment is visible. It shows the method of pouring concrete.
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Nevada valve house roof, looking upstream. View of the roof of the Nevada valve house during construction. Note the low strength pedestals and the double layer of railroad iron being placed. The face of the dam can be seen in the background at the...
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Switchyard control house, yard and present substation -- Hoover Dam site Shows the switchyard control house, yard and substation. Workers, trucks, construction equipment and roads are visible.
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View of lower portal during Hoover Dam construction Shows the cleanup of the Arizona side of the lower portals. Buildings and trucks are visible. The portal juts out from the side of the canyon.
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Construction view of the valve house and portal area of Hoover Dam Shows the Nevada construction adits, valve house and plug adit portal. Note the absence of the compressor plant. The beginning of the upstream of the lower portal road tunnel is visible. Buildings and structures, roads, and cables are...
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View inside a tunnel at Hoover Dam site Shows the building forms inside a tunnel at Hoover Dam. The shot is taken from the downstream Nevada adit, looking toward a downstream plug. Several construction workers can be seen.
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Looking upstream at Hoover Dam during construction 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.
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View from the top of Hoover Dam during construction View looking down from the top of Hoover Dam during construction. It shows the power houes, the valve houses and the lower cofferdam. Cars and trucks, buildings and structures, roads, and various equipment can be seen. A cable...
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Arizona intake towers, from the Nevada side View of the Arizona intake towers during construction. They are on the side of the canyon and the Colorado River is visible below. Above and behind the towers a cableway is suspended and other equipment can also be...
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Nevada intake towers, from the Arizona side. Shows the Nevada intake towers at Hoover Dam under construction. Hoisting equipment and cables are visible. At the left of the photo is the face of Hoover Dam. Some buildings and structures are visible at the base...
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Hoover Dam switchyard during construction Shows the Hoover Dam switchyard during construction and excavation. Buildings, roads, and building materials are visible. Trucks and a power shovel are also shown.
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Top of Hoover Dam during construction 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....
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Hoover Dam during construction Shows the upstream side of Hoover Dam during construction. Cableways with trams span the canyon. Intake towers and power houses are visible along with other buildings and structures.
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Top of Hoover Dam during construction Shows the top of Hoover Dam during construction. Construction workers as well as hoisting machinery and other types of equipment are visible atop the dam . Shows the start of utility and elvator towers.
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Blasting and construction on Hoover Dam Blasting in Black Canyon for construction. Construction equiqment can be seen along side the Colorado River.
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View taken from the side -- Hoover Dam construction Looking across Hoover Dam from the Arizona side, showing elevator and utility towers under construction. Buildings and structures are visible on the side of the canyon.
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Looking downstream at Hoover Dam under construction View of Hoover Dam during construction. The view was taken from high above, looking downstream, and shows the intake towers, roads, buildings and structures, a cable across the dam, and the reservoir (later known as Lake Mead).
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View of spillway bridge under construction -- Hoover Dam Shows the Arizona spillway bridge under construction. Concreting machinery and scaffolding are shown.
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View of spillway during construction of Hoover Dam 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.
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Spillway and Hoover Dam during construction Shows the Nevada spillway and the face of the dam in the background. Cars are visible on the road across the top of the dam. Some of the intake towers are also visible. Construction equipment, buildings, and...
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View of switchyard during construction of Hoover Dam Shows the switchyard, rigging loft, and surrounding area near Hoover Dam. The mountains are in the background and roads, buildings, and construction equipment are visible.
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Hoover Dam during construction View looking upstream of the dam and power house. Cables with trams and temporary bridges span the canyon. Trucks, roads, buildings and construction equipment can be seen.
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Valve house during Hoover Dam construction Shows the Nevada valve house during construction. It is built into the side of the canyon wall. Below it is the refrigeration plant. Cables, a truck, buildings, and scaffolding can be seen.
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Hoover Dam under construction 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.
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Interior of Hoover Dam diversion tunnel during construction Shows the interior of a diversion tunnel at Hoover Dam during its construction. A construction worker and equipment can be seen. Note the cleanup operations, getting ready for the carpenters.
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Arizona spillway, looking upstream. View from canyon rim looking upstream through the Arizona spillway. Scaffolding is in the foreground in preparation of building the bridge over the spillway. To the left are the spillway gates with a crane extending behind.
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Hoover Dam during construction View looking upstream toward Hoover Dam. Alos shows the entrance to a tunnel and the powerhouses under construction. Trucks, cables, a cableway with trams, and other construction equipment can be seen.
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Power house during construction -- Hoover Dam View of the power house from the top of Hoover Dam, looking down. The valve houses are visible on the sides of the canyon. Roads, trucks, buildings, and the concrete pouring forms can also be seen.
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View of switchyard at Hoover Dam site General view of the switchyard at Hoover Dam. A power shovel, dump truck, and other construction equipment are visible. Buildings and a few construction workers are also seen.
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Hoover Dam from the Arizona side View of Hoover Dam, taken from the Arizona side, showing the intake towers and reservoir (Lake Mead) above the dam. A power shovel and also some buildings are visible. In the background there is construction equipment in the...
 

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