Search for exactly "Electric lighting"

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Night view of Hoover Dam under construction Night view of the construction of Hoover Dam. This postcard, published by Frasher's, Inc., shows the downstream face of the dam with the concrete pouring forms. Buildings and structures are visible on the floor of the canyon....
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Crane transporting mixers in diversion tunnel at Hoover Dam site Photo shows a crane transporting cement mixers pouring the concrete lining in a diversion tunnel for Hoover Dam. Workers and equipment are visible in the interior of the tunnel.
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Putting in the ceiling on the Nevada side of the no. 2 diversion tunnel Interior view of construction on the Nevada side of the no. 2 diversion tunnel. The tunnel walls are illuminated by electric lights. A truck and workers are seen in the middle of the tunnel floor.
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Putting in the ceiling on the Nevada side of the no. 2 diversion tunnel Interior view of construction on the Nevada side of the no. 2 diversion tunnel. Scaffolding rigged with electric lights is standing on the middle of the tunnel floor.
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Night view of the gravel plant Night view of the gravel plant, which is illuminated with electric lights. Piles of raw aggregate and a building stand in the foreground.
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Invert concrete pouring forms inside diversion tunnel Interior of a diversion tunnel, showing invert concrete pouring forms. Some construction workers can be seen in the foreground. The tunnel is illuminated by electric lights.
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Gantry crane inside diversion tunnel no. 3 A gantry crane is seen inside a diversion tunnel during construction of Hoover Dam. A flat bed truck is seen on the tunnel floor in the foreground and construction workers stand by. The tunnel is illuminated by electric...
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Invert forms inside diversion tunnel no. 3 Interior of diversion tunnel no. 3, showing invert forms used for pouring concrete slabs. A trimming jumbo used for aligning the gauge of the tunnels is seen in the background. The tunnel is illuminated by electric lights.
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Concrete lining inside diversion tunnel no. 3 View of the interior of diversion tunnel no. 3, showing the invert and side wall sections of three-feet thick concrete lining. The tunnel is illuminated by electric lights. Two construction workers stand inside the tunnel.
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Concrete lining inside diversion tunnel no. 2 View of the interior of diversion tunnel no. 2, showing the completed invert and side wall sections of concrete lining. The tunnel is illuminated by electric lights. On the tunnel floor, construction workers stand by a truck which is...
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Concrete side wall lining in diversion tunnel no. 3 View of the interior of diversion tunnel no. 3, showing completed side wall sections of concrete lining. The tunnel is illuminated by electric lights. Concrete pouring forms and a gantry crane are seen in the rear of the tunnel.
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Side-wall jumbo inside diversion tunnel View of the interior of a diversion tunnel showing the side-wall jumbo used for placing of the concrete tunnel lining. The tunnel and jumbo are illuminated by electric lights. A construction worker stands in the foreground. A truck...
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Construction workers with electric light reflectors standing by a truck in Black Canyon Several construction workers in Black Canyon prepare reflectors for electric lighting from metal dishpans. Some of the workers stand in a truck bed and others stand beside the truck.
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Diversion tunnel at Hoover Dam Looking into the interior of a partially constructed diversion tunnel. There appears to be some sort of scaffolding for construction workers to stand on and the tunnel is illuminated by electric lighting.
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Forms for transition at the downstream plug of Diversion Tunnel No. 2. Interior of diversion tunnel no. 2, illuminated by electric lights, showing construction workers with concrete pouring forms. The tunnel walls are partially finished.
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Excavation for downstream plug, Diversion Tunnel No. 2. Interior of diversion tunnel no. 2, showing excavation work. Construction workers stand on and below scaffolding to reach the tunnel walls and ceiling. Trucks are seen on the tunnel floor. The site is illuminated by electric lighting. ...
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Excavation for downstream plug, Diversion Tunnel No. 3. Construction workers are seen excavating the interior of diversion tunnel no. 3. The tunnel is illuminated by electric floodlights. Construction equipment is seen on the tunnel floor.
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Concrete pouring forms inside lower no. 2 plug Interior of lower no. 2 plug, illuminated by electric lighting. Concrete pouring forms for an arch and walls are seen. Other construction equipment is seen on the tunnel floor. A "700" is marked on the rock near the roof...
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Inside machinery room at Hoover Dam site This shows a room filled with machinery. There is a huge motor attached to the floor and there are large wheel turning valves shown on the right side of the photograph. In the background, the rear of the room appears...
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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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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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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. 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 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 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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Interior of diversion tunnel during Hoover Dam construction Interior view of a diversion tunnel, showing the water conduit being placed. Scaffolding is visible and the area is lit with electric lighting.
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Outlet works -- Hoover Dam -- night view Night view of Hoover Dam with water discharging from the outlet works.
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Construction -- Hoover Dam outlet works Night view of water spewing from the outlet works at Hoover Dam.
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Night construction -- intake tower at Hoover Dam 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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Hoover Dam -- at night Color transparency showing Hoover Dam just after dusk. The dam is illuminated with electric lighting and the tops of the intake towers are visible. The lights are reflected in the waters of the reservoir (Lake Mead).
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Outlet works -- Hoover Dam Night view, taken from above, of water spewing from the outlet works at Hoover Dam. The scene is lit up with electric lighting.
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Night view of the diversion tunnels Night view looking upstream. A spectacular sight with its myriads of lights. Shows lighted bridges across the canyon above the Colorado River.
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Night view of outlet works at Hoover Dam during construction 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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Hoover Dam -- at night Color transparency of the upstream face of the dam and power house at night. The dam is illuminated by electric lighting. The lights are relected in the waters of the Colorado River below the dam.
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Hoover Dam -- at night This color transparency shows Hoover Dam at night, looking upstream. Electric lights illuminate the dam. The power house is visible and the transmission towers can be seen above the dam.
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Top of Hoover Dam at night Color transparency showing Hoover Dam lit up at night. The top of the dam with the intake towers, is visible.
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Hoover Dam at night Color transparency showing a panoramic view of Hoover Dam at night, looking upstream. The dam is lit up and the face of the dam and the power house are clearly visible. The lights are reflected in the waters...
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Hoover Dam -- at night Color transparency showing the upstream face of Hoover Dam. The dam is illuminated by electric lights making the crest of the dam, the intake towers, and the power house visible.
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Hoover Dam at night from downstream side Face of Hoover Dam illuminated at night with water streaming from the outlet works on the Nevada side. Also shows the central power house.
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Night construction, Hoover Dam Night view of Hoover Dam during construction. The power houses, concrete forms, and upstream face of the dam are illuminated by electric lighting.
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Spillway construction, Hoover Dam, at night Night view of the construction of one of the spillways at Hoover Dam. The view looks straight down into the spillway and under the bridge which spans it. The scene is lit by electric lighting. Construction equipment...
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Night view of Hoover Dam Night view of the downstream face of Hoover Dam. The power houses, the face of the dam, and the water are illuminated by electric lighting.
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Hoover Dam at night This postcard shows the downstream face of Hoover Dam at night. The intake towers and some transmission towers are visible, lit by electric lighting.
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Night view of Hoover Dam Night view of the downstream face of Hoover Dam. Electric lighting illuminates the face of the dam, the intake towers, and some transmission towers.
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Workers in diversion tunnels -- Hoover Dam site Shows construction workers, truck, and power shovel inside a diversion tunnel at the Hoover Dam construction site. Electric lights illuminate the scene.
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Construction workers in diversion tunnel, Hoover Dam site Shows construction workers posing on the drilling jumbo inside a diversion tunnel during the construction of Hoover Dam. Other men are standing on the floor of the tunnel looking up at the jumbo. Electric lights illuminate the tunnel.
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Diversion tunnel under construction at Hoover Dam site View of the interior of one of the diversion tunnels during construction at Hoover Dam. Electric lights illuminate the scene.
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Aerial view of sundown in Black Canyon at the Hoover Dam construction site View of the Colorado River flowing through Black Canyon at dusk. Bridges and catwalks illuminated by electric lights span the canyon over the river. Other electric illumination is seen throughout the construction site.
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Sundown in Black Canyon at the Hoover Dam construction site Night view of the Colorado River flowing through the Hoover Dam construction site in Black Canyon. Catwalks are seen suspended over the river. The site is illuminated by electric light.
 

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