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51 Object thumbnail
Construction bridges across the Colorado River 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...
52 Object thumbnail
Sedimentation tank at Hoover Dam for Boulder City water supply. Shows sedimentation tank on the Colorado River at Hoover Dam that supplies the water for Boulder City.
53 Object thumbnail
Lewis Construction Company drilling railroad tunnels of U.S. Construction Railroad to Hoover Dam. Construction workers using construction equipment to drill railroad tunnels.
54 Object thumbnail
Hoover Dam construction site, looking upstream This is a view of the wooden concrete forms used in the construction of Hoover Dam, looking upstream. Buildings and vehicles are visible. The photo was taken from high above the site.
55 Object thumbnail
Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam... Construction workers are operating a power shovel, dumping dirt into a dump truck in a diversion tunnel at Hoover Dam. This is in the early phase of dam construction.
56 Object thumbnail
Hoover Dam site, looking upstream Vehicles, men, and construction equipment are visible. This view was taken in the early stages of the construction of Hoover Dam in the bottom of Black Canyon.
57 Object thumbnail
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.
58 Object thumbnail
Hoover Dam site, looking downstream View of the beginning of Hoover Dam contruction at the bottom of Black Canyon. Various pieces of equipment, trucks, workers, etc. are visible including a crane suspended above the construction site. The view is from downstream.
59 Object thumbnail
First concrete in Hoover Dam Construction workers are pouring the first concrete for the foundation of Hoover Dam in the bottom of Black Canyon. Large bucket suspended from a crane is visible as well as the concrete frames for the pour.
60 Object thumbnail
Hoover Dam, looking upstream View from high above the canyon of the early stages of building the wooden forms for pouring the concrete in the construction of Hoover Dam in Black Canyon. Vehicles and other equipment can be seen as well as hoisting...
61 Object thumbnail
Hoover Dam, looking downstream 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...
62 Object thumbnail
Hoover Dam construction, looking upstream This photo shows the construction of the foundation of Hoover Dam on the floor of Black Canyon. Trucks, construction equipment, and cranes can be seen as well as several construction buildings. Photo taken from high above the canyon.
63 Object thumbnail
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.
64 Object thumbnail
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.
65 Object thumbnail
No. 1 and no. 2 tunnels View of the mouths of diversion tunnels no. 1 and no. 2. A steel bridge crosses the Colorado River over Black Canyon.
66 Object thumbnail
Sidewall concreting inside diversion tunnel no. 4 Construction inside of diversion tunnel no. 4. Steel beams rigged with electric lights frame the walls and ceiling of the tunnel. A construction truck and workers are seen on the tunnel floor. In the distance a gantry...
67 Object thumbnail
Sidewall concreting in diversion tunnel no. 4 showing workers Construction inside diversion tunnel no. 4. Steel beams rigged with electric lights frame the tunnel walls and ceiling. A construction truck and workers are seen on the tunnel floor. Two workers are in the foreground.
68 Object thumbnail
Penstock tunnel, Hoover Dam Aerial view of the Hoover Dam construction site on the Colorado River in Black Canyon. Cables are suspended across the canyon and a dirt road runs along the canyon floor. Early construction on a penstock tunnel can be...
69 Object thumbnail
Penstock tunnel piping Two construction workers are seen standing in front of a piece of thirty foot diameter penstock tunnel piping, which is loaded on a wheeled platform.
70 Object thumbnail
Concrete form construction work View of construction workers buidling wooden forms for concrete pouring on Hoover Dam. The concrete dam wall is partially finished, and framework surrounds the beginning construction of the intake towers.
71 Object thumbnail
Concrete pouring forms on the Hoover Dam construction site seen from downstream 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.
72 Object thumbnail
Concrete pouring forms and construction on the intake towers at Hoover Dam 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.
73 Object thumbnail
Union Pacific Streamline train at the dam site 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. ...
74 Object thumbnail
Union Pacific Streamline train at the dam site 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.
75 Object thumbnail
Hoover Dam from the downstream side 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...
76 Object thumbnail
Hoover Dam construction from the downstream side 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.
77 Object thumbnail
Hoover Dam construction from the downstream side 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.
78 Object thumbnail
Hoover Dam from the downstream side 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.
79 Object thumbnail
Hoover Dam from the downstream side 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.
80 Object thumbnail
Pouring concrete on Hoover Dam Overhead view of construction on the dam wall. Concrete pouring forms and buckets are seen.
81 Object thumbnail
Concrete bucket on flat car View of concrete pouring bucket suspended over railroad flat car.
82 Object thumbnail
Low mix concrete plant 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.
83 Object thumbnail
High level concrete plant View of the buildings and structures forming the high level concrete plant at the Hoover Dam construction site.
84 Object thumbnail
Hoover Dam construction, looking upstream 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.
85 Object thumbnail
Hoover Dam construction, looking upstream 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.
86 Object thumbnail
Hoover Dam construction, looking upstream 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...
87 Object thumbnail
Hoover Dam construction, looking upstream 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...
88 Object thumbnail
Hoover Dam construction, looking upstream 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 suspended...
89 Object thumbnail
Hoover Dam construction, looking upstream 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...
90 Object thumbnail
Hoover Dam construction, looking upstream 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 suspended...
91 Object thumbnail
Hoover Dam construction, looking upstream 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...
92 Object thumbnail
Start of construction of an intake tower 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...
93 Object thumbnail
Power house construction 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...
94 Object thumbnail
Aerial view of Hoover Dam from Lookout Point on the Nevada side 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.
95 Object thumbnail
Hoover Dam from Lookout Point on the Nevada side with cars in foreground 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...
96 Object thumbnail
Hoover Dam from Lookout Point on the Nevada side View of the Hoover Dam construction site within Black Canyon. The dam wall, intake towers and the road across the top of the dam wall are nearly complete. Construction equipment and buildings are seen in the mountains, and the Colorado...
97 Object thumbnail
Hoover Dam from the downstream side View of the Hoover Dam construction site within Black Canyon from the downstream side of the Colorado River. The mouths of the diversion tunnels are seen in the foreground and the dam wall is nearly complete. Construction equipment,...
98 Object thumbnail
Hoover Dam from the downstream side with bridge and buildings View of the Hoover Dam construction site within Black Canyon from the downstream side of the Colorado River. The dam wall is nearly complete and the mouths of the diversion tunnels can be seen. Building plants and construction equipment are...
99 Object thumbnail
Hoover Dam under construction View of Hoover Dam in the later stages of construction. The Colorado River can be seen above the dam. The intake towers now rise behind the dam and this view also shows concrete forms, hoisting equipment and...
100 Object thumbnail
Power house on Nevada side of Hoover Dam View of a power house on the Nevada side taken during the construction of Hoover Dam. Shows power penstock tunnels, scaffolding, construction equipment and trucks.
 

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