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101 - 125 of 1628 Items << < 1 2 3 4 5 6 7 8 9 10 > >>
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This view, taken from the Nevada side of the canyon, shows the lower cofferdam being excavated. Trucks, buildings, , and construction roads are visible. The Colorado River can be seen below the site. There is a temporary bridge acorss the...
1934-09-17
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Close-up view of a power house under construction at Hoover Dam. Shows concrete pouring forms and the pouring arrangement. There is a construction building and a construction worker in the lower left corner.
1934-04-25
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Interior view of number 4 raise and plug showing construction. Construction workers can be seen at the far end of the tunnel.
1934-03-28
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Construction workers use ropes to pull themselves up and down the cliffs in Boulder Canyon. The workers use picks to dig trails on the mountainside.
2024-04-25
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This photo shows two construction workers operating equipment used in the construction of Hoover Dam.
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Close-up of construction workers using a drilling jumbo to excavate the interior of one of the diversion tunnels. The tunnel is illuminated by floodlight.
1932-03-08
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View of Black Canyon with construction equipment on the canyon floor and cables suspended over the canyon. High scalers can be seen on the rock face on the left side of the photo.
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Shows construction workers pouring concrete at Hoover Dam. The huge bucket for pouring concrete and concrete forms are visible. This photo is a postcard.
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Shows construction on two of the intake towers. A construction worker is standing on the intake tower nearest the camera. Consturction with concrete pouring forms on the top of the dam is also visible as is construction equipment such as a...
1934-12-05
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View of construction of the roadway on the top of Hoover Dam. The Arizona intake towers and spillway are seen at the top of the picture. Construction workers and concrete pouring forms are seen at the top of the dam face.
1935-03-25
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Shows the switchyard control house, yard and substation. Workers, trucks, construction equipment and roads are visible.
1935-08-26
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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.
1934-11-17
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Close-up of construction on the Nevada powerhouse. Construction workers stand amid piles of lumber on the ground. Wood and steel framework is seen at the top of each draft tube in the power house.
1934-09-27
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Photo shows men working on the Nevada spillway weir. There are concrete forms, various buildings, construction equipment, and a truck in the scene.
1933-09-15
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Shows construction equipment and workers in the gorge of Black Canyon. Bucket skips are being loaded with muck to be transported out of the canyon. Also shows a power shovel and high scalers.
1933-06-05
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Construction workers are seen working with a drilling jumbo inside diverson tunnel no. 4.
1932-03-08
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View of the construction of the foundations of Hoover Dam on the floor of Black Canyon. Various pieces of machinery can be seen as well as a construction building. The view is taken from high above but several construction workers are also visible.
1933-06-21
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This is a view of construction workers working on a tunnel at the Hoover Dam site. There are two construction workers standing to the side of a track leading from a tunnel in the side of the mountain. There is a is a construction worker operating...
2024-04-25
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View of construction on the Nevada and Arizona power houses, taken from the valve house catwalk in the lower cofferdam. The dam face is seen in the background. Concrete pouring forms are visible on the power houses. Temporary buildings,...
1935-06-24
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View from the downstream cofferdam of the Hoover Dam construction site. Construction workers, temporary buildings, electric draglines, vehicles and other construction equipment are seen in the cofferdam. Framework rises from the tops of the power...
1934-09-27
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Shows interior of a power house under construction. A construction worker is visible between the reinforcing steel and pipes.
1934-04-25
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This shows a construction worker operating a construction tractor which is loading dirt and rocks into the scoop on the front of the tractor.
2024-04-25
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This is a view of a truck loaded with equipment driving across a bridge spanning the Colorado River at Hoover Dam site. Construction workers and equipment are shown on the bank of the river. At the right is an abandoned temporary truck bridge.
1932-04-12
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Riggers working on the aggregate conveyor suspension bridge high above the river.
2024-04-25
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