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Aerial view of multiple concrete pouring forms on Hoover Dam, seen from downstream on the Colorado River in Black Canyon. Cables, pulleys and catwalks are suspended over the river. Some construction equipment can been seen on the mountains.

View of multiple concrete pouring forms and framework for the intake towers on Hoover Dam. Construction workers, equipment, roads and structures can be seen in Black Canyon, and the Colorado River can be seen in the distance.

Construction workers stand outside a Union Pacific Streamline train at the dam site. Workers continue work on pouring concrete into forms on the top of the dam wall. Scaffolding supports workers working on the face of the dam wall. A section of...

A Union Pacific Streamline train is seen at the dam site near the dam wall. Sections of temporary stairways are seen attached to the mountain side. Construction on one of the intake towers is also seen.

View from downstream on the Colorado River of Hoover Dam construction. Scaffolding and wooden concrete pouring forms are still visible on the dam wall and in the riverbed. The dam wall is almost complete and construction on the intake towers has...

View of construction on Hoover Dam from downstream on the Colorado River. Scaffolding and concrete pouring forms are seen on the dam wall and in the riverbed. Temporary buildings are seen in the foreground.

View from downstream on the Colorado River of Hoover Dam construction. Scaffolding and construction equipment are seen on the dam wall, in the riverbed and on the mountains. Construction on one of the intake towers is visible.

View of the Hoover Dam construction site from downstream on the Colorado River. Scaffolding and forms are seen on the dam and in the riverbed.

View of the Hoover Dam construction site from downstream on the Colorado River. Scaffolding and forms are seen on the dam and in the riverbed. Temporary buildings are also seen in the foreground.

Overhead view of construction on the dam wall. Concrete pouring forms and buckets are seen.

View of concrete pouring bucket suspended over railroad flat car.

Aerial view of the Colorado River running through Black Canyon. The buildings and structures forming the low mix concrete plant are seen on the right side.

View of the buildings and structures forming the high level concrete plant at the Hoover Dam construction site.

View of the construction of Hoover Dam, looking upstream. Shows concrete forms, various construction buildings, and high scaling equipment. Taken from high above, the Colorado River can be seen above the dam site.
1933-08-07
Upstream view of the Hoover Dam construction. Shows concrete forms, construction buildings, and a train winding along the edge of the canyon. The Colorado River is visible above the construction site.
1933-08-22
View from on high of Hoover Dam construction, looking upstream. The Colorado River can be seen above the dam. Also shows concrete forms, a train winding along the side of the canyon, high scaling equipment, construction buildings, and a wire...
1933-08-31
Overhead view of the construction of Hoover Dam in Black Canyon. Looking upstream, the Colorado River is visible above the dam site. Also shows concrete forms, a train winding along the side of the canyon, and various construction buildings.
1933-09-07
Construction site of Hoover Dam in Black Canyon, looking upstream. Above the site is the Colorado River. Shows concrete forms, a train winding along the wall of the canyon, various construction buildings, hoisting machinery, and a cable...
1933-09-15
View of Hoover Dam construction site, looking upstream. Above the site is the Colorado River. There are concrete forms, construction buildings, hoisting machinery, and a cable high above the Black Canyon in the picture. There is also a train...
1933-09-22
Construction photo of Hoover Dam in Black Canyon, showing the Colorado River above the dam site. Also shows concrete forms, a train winding along the canyon wall, high scaling and hoisting machinery, various construction buildings and a cable...
1933-09-22
Overhead view of the construction of Hoover Dam in Black Canyon with the Colorado River visible above the dam site. In the photo are concrete forms, various construction buildings, a train winding along the side of the canyon, high scaling and...
1933-09-22
View of the Hoover Dam construction site, showing partial completion of the dam wall and early work on one of the intake towers. Scaffolding is seen on the cliff face, and a bucket of concrete is suspended by a crane over the dam. People can be...

Aerial view of the Hoover Dam construction site within Black Canyon. The nearly-completed dam wall is seen in the back and the mouths of the diversion tunnels are seen in the foreground. Buildings and scaffolding stand on the river bed. Early...

View of the top of the dam wall with concrete pouring forms on top. Construction on two of the intake towers is seen behind the wall.

View of construction on Hoover Dam from a lookout point on the Nevada side. The dam wall is nearly completed and construction on the intake towers is seen in the background. In the foreground, people stand at the edge of the lookout point and...

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