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201 Object thumbnail
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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Construction of the Arizona power house 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.
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Central section of the powerhouse Shows the floor level of the powerhouse under construction. The number 2 adit car is in the extreme background. Construction workers are also visible.
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Nevada powerhouse, showing the reinforcing and walls around the penstock openings Shows construction of the Nevada power house with reinforcing and the walls around the penstock openings. Also shows a pumpcrete machine in the butterfly valve gallery between the rock abutement and the turbine rooms.
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Pipe gallery of the Nevada power house Shows beams and concrete pouring forms in the pipe gallery of the Nevada power house under construction.
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Upper portal trashrack for diversion tunnel no. 1, on the Nevada side. Shows the concrete pouring forms for the upper portal trashrack for diversion tunnel no. 1 on the Nevada side.
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Diversion tunnel no. 2, showing the pumpcrete line to the upstream plug Shows the concrete pipe line from the pumpcrete gun to the upstream plug in diversion tunnel no. 2. Some construction workers are visible.
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Looking downstream into no. 4 raise, showing close-up of portal forms. Shows concrete pouring forms for the portal of no. 4 raise.
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Looking downstream into the Nevada spillway. Shows construction on the spillway on the Nevada side. Shows derrick cranes, cables overhead, part of the dam, and the intake towers under construction.
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Hoover Dam, looking upstream from Lookout Point 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.
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Third millionth cubic yard of concrete being lowered to Boulder Dam A concrete pouring bucket lowers the third millionth yard of concrete used in the construction of Hoover Dam. Cableways, the intake towers under construction, mountains, and construction workers are also visible.
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Looking upstream through penstock tunnel no. 5 Taken inside penstock tunnel no. 5, perspective to the left shows upstream view through the tunnel. Foreground shows manway tunnel angling down and to the right.
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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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Looking upstream in Black Canyon, showing the downstream face of Boulder Dam. Aerial view of the dam under construction looking upstream from the Nevada side. Concrete pouring forms and scaffolding show along the face of the dam. Power houses under construction can be seen at the foot of the dam....
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View showing installaion of 100-ft. drum gates in the Arizona spillway. Right side of image shows three drum gates in varying stages of installation. Foreground gate is the most complete. Cable way can be seen across the top. Concrete forms are on the left.
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View of the Nevada intake towers, taken from the Arizona side. View of two intake towers under construction. Left tower is further along than right. To far left can see temporary stairway going up the side of the canyon. In left foreground can see pouring forms for the...
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Arizona intake towers and spillway 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...
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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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Interior of power house gallery, Hoover Dam site Shows the interior of the power house governor gallery. It is illuminated with electric lighting and pieces of lumber are lying on the floor.
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Interior of power house turbine gallery, Hoover Dam site Shows the interior of a power house turbine gallery during the construction of Hoover Dam.
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Interior of power house gallery, Hoover Dam site Shows the interior of a power house pump gallery being constructed at Hoover Dam. Shows wiring and electric lights.
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Interior of power house gallery, Hoover Dam site Shows the interior of a power house cable gallery during the construction of Hoover Dam. It is illuminated with electric lighting.
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Interior of valve house during Hoover Dam construction Interior view of a a valve house under construction at Hoover Dam. An emergency gate is being installed. Construction materials are lying on the floor.
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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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Cleanup site at lower portal of Hoover Dam Shows the cleanup work being done at the lower portal on the Nevada side of the canyon. A power shovel with men aboard is visible. Also cables and other equipment can be seen. The portal is jutting...
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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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Downstream view of Hoover Dam construction Shows a downstream view of the Hoover Dam project from the crest of the dam. Power house and lower portals of diversion tunnels are seen. Buildings and structures, trucks and roads are visible also.
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Panoramic view of Hoover Dam and area during construction Panoramic view of Black Canyon and Hoover Dam during construction. A man is standing on the mountain, looking toward the scene. Note the reservoir (Lake Mead) and Fortification Hill in the background. The portals of the diversion...
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View from the reservoir, looking downstream at Hoover Dam View,looking downstream, of Hoover Dam and the intake towers. There is a boat on Lake Mead (the reservoir).
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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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Construction inside tunnel, Hoover Dam site Shows construction looking upstream in a tunnel at Hoover Dam. One of the pipe sections is in place. Scaffolding and other building materials are shown.
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Interior of diversion tunnel showing pipe Shows the pipe inside a diversion tunnel at Hoover Dam during construction. Electric lights illluminate the scene. Building materials 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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