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376 - 400 of 1090 Items << < 11 12 13 14 15 16 17 18 19 20 > >>
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View of the mouths of diversion tunnels no. 1 and no. 2. A steel bridge crosses the Colorado River over Black Canyon.
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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.
1932-03-23
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Construction workers are operating machinery to finish slabs in the invert lining of a diversion tunnel at the Hoover Dam site.
1932-04-11
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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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Two identical views of the downstream face of Hoover Dam after completion. Cars are parked at a scenic overlook near the dam. The intake towers are visible behind the dam and a portion of the reservoir (Lake Mead) can be seen.
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Aerial view of Hoover Dam after completion. The intake towers are visible behind the dam as Lake Mead (the reservoir) is filling. The spillways can be seen also. The power houses can also be seen at the bottom of the dam.
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Aerial view of Hoover Dam and the surrounding area showing the downward face of the dam, the intake towers, Lake Mead (the reservoir) and a portion of the Colorado River. Fortification Hill is visible in the background. The wing of the plane...
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Aerial view of Hoover Dam and the surrounding area from the downstream side. The face of the dam is visible with the intake towers behind it. Lake Mead (the reservoir) can be seen.
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Shows construction of Hoover Dam from the upstream side. Buildings and trucks are visible on the cofferdam. One of the portals to the diversion tunnels can be seen at lower left. The intake towers are rising behing the face of the dam. Cables...
1934-05-29
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Aerial view of Hoover Dam and the surrounding area showing Lake Mead (the reservoir) and part of the Colorado River. Water is flowing from the outlet works, and the intake towers are visible behind the dam. Shows the downstream face of the dam.
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A postcard (retouched image) of upstream face of Hoover Dam. The power houses and intake towers are visible as well as the Colorado River and Lake Mead (reservoir).
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View of the downstream face of Hoover Dam showing the intake towers and some of the transmission towers. Lake Mead (reservoir) is visible above the dam.
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Handwritten inscription on back of photo: "Downstream face of Boulder Dam as seen from low level catwalk. Top forms at elevation 710." Shows the concrete forms for the face of the dam. Buildings and structures can be seen on the upper...
1933-11-27
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Aerial view of Hoover Dam showing the downstream face, the intake towers, and the spillways. Lake Mead (reservoir) is forming above the dam and roads are visible around and leading to the dam.
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"At lower portal mouths on Arizona side of river. Picture taken from Nevada side." (handwritten inscritpion on back of photo) Shows a temporary suspension bridge and several buildings near the lower portals of Hoover Dam. Cables are suspended...
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View of the gravel plant being constructed near the Hoover Dam site. Railroad tracks and a flatbed railroad car are visible.
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Downstream face of Hoover Dam showing water discharge from tunnel outlets. Dam is completed, power houses and part of the Colorado River are visible as well as a cableway above the canyon.
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Handwritten inscription on back of photo: "16-rigger riding the hook on a cableway (one of nine that span Black Canyon). The highway approach to the dam from the Arizona side can be seen across the canyon."
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Handwritten inscription on back of photo: "View at upper portals showing narrowed channel just prior to diversion". Construction roads, equipment, and workers are visible. Some buildings and trucks are also in the picture.
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"First load of muck used in coffer dam [sic]. Looking at Arizona portals #3 & #4. Water now flowing thru these." (hand-written inscription on back of photo) Shows a dump truck dumping the muck and construction workers shoveling. A building...
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View of the top of the dam from the Arizona side. There are automobiles on the road across the top of the dam. Intake towers are in the forground and also in the background. A sailboat is seen sailing on the reservoir. The water in the reservoir...
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View of The Colorado River and the construction roads on the sides of the canyons and mountains. Taken from very high above. Some buildings and structures are also visible.
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Shows a car and a barge on the Colorado River near the Hoover Dam site.
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Shows a dump truck and construction workers framed at the mouth of a diversion tunnel during the construction of Hoover Dam.
1933-05-10
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Shows a construction worker and power shovel inside a diversion tunnel at the Hoover Dam construction site.
1932-03-07
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