Search for exactly "Construction workers"

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Construction workers using a drilling jumbo inside a diversion tunnel Construction workers using a drilling jumbo to excavate one of the diversion tunnels.
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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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Construction workers on cliffs in Boulder Canyon. 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.
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Construction workers inside Hoover Dam diversion tunnel Shows a power shovel dumping concrete into a dump truck inside a diversion tunnel during the construction of Hoover Dam. Construction workers are visible at work.
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Construction workers at Hoover Dam Two construction workers at the Hoover Dam site working with heavy machinery.
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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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Construction workers on cableway transport over the Colorado River Construction workers are seen being transported over the Colorado River in Black Canyon via a "skip," or platform, attached to overhead cableways.
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Hoover Dam construction workers Shows construction workers being lowered by cable into the canyon to work on Hoover Dam.
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Close-up of construction workers rigging a cableway over the Colorado River Two construction workers are seen rigging a "skip," or platform, to a cableway above the Colorado River in Black Canyon. The skip will be used to cross the river above the canyon.
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Construction workers at Hoover Dam site. This photograph shows two construction workers standing on the mountainside in front of a tunnel. They appear to be unloading dirt and rocks from a container over the side of the mountain.
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Construction workers at bottom of Boulder Canyon Two construction workers stand at what appears to be an entrance to a tunnel in Black (not Boulder) Canyon. Cables are visible above the men.
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Construction workers at Hoover Dam. This photograph shows workers operating a power shovel to dig dirt and rocks and put them in a truck at the Hoover Dam site. The picture also shows an air compressor.
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Construction workers on the drum gates in the Arizona spillway Two construction workers standing on a suspended scaffold work on the drum gates on the Arizona spillway.
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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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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.
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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.
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Close-up of workers using a drilling jumbo inside a diversion tunnel 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.
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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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Construction scene at Hoover Dam site Shows construction crew and equipment at the Hoover Dam site. Power lines are also in the scene.
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Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast. A close-up of the portals to diversion tunnels no. 3 and 4 on the Colorado River. Construction workers prepare equipment for a blast. A truck loaded with lumber can be seen between the tunnels.
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Dump trucks on temporary dike in front of portals of diversion tunnels no. 3 and... View of the temporary dike created to divert the Colorado River into the diversion tunnels. Dump trucks and construction workers are seen on the temporary pile bridge and the portals of diversion tunnels no. 3 and 4 are seen in...
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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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Closeup of cooling pipe layout in panel H-3. Close-up of construction workers setting up concrete cooling pipes in the Hoover Dam construction site.
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Unloading huge pipes -- Hoover Dam site Shows valve house outlet pipes being uloaded with a cableway. A construction worker is standing on top of a pipe as it is being lifted off a railroad car.
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Construction on the no. 4 penstock raise View of construction workers on framework inside the no. 4 penstock tunnel portal during construction of Hoover Dam.
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Construction on the Nevada and Arizona power houses in the downstream cofferdam below Hoover Dam 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 houses on both sides of...
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Close-up of the Nevada powerhouse, showing the draft tubes. 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.
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Construction in the no. 4 penstock raise View of construction inside the no. 4 penstock raise. Construction workers stand on the framework and platforms inside the unfinished tunnel.
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Construction in the no. 1 penstock raise View of construction work inside the portal of the no. 1 penstock raise. Construction workers can be seen on the framework outside of the portal.
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Hoover Dam construction, looking down on top Shows construction workers and equipment on the top of Hoover Dam.. They are building the roadway across the dam. Trams on cableways and intake towers can be seen in the background. A bucket is pouring the roadway...
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Intake towers during construction of Hoover Dam Close-up view of the construction of the Arizona intake towers showing forms for the dome of the tower on the left, which is no. 6. Construction workers are on the very tops of the towers doing concrete work. ...
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Steel rails on the roof of the Nevada valve house awaiting concrete pouring View of steel rails on the roof of the Nevada valve house, ready for pouring concrete slab. Two construction workers are seen in the distance near the canyon wall.
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Construction on the Nevada spillway A construction worker stands in front of a fence above the Nevada spillway. Construction on one of the intake towers can be seen in the upper left. Concrete pouring forms, other construction equipment and temporary buildings can be seen in...
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Crew operating construction equipment at Hoover Dam site Construction workers appear to be near the top of a canyon as they observe a coworker operating a power shovel which is being used to move rocks and boulders.
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Hoover Dam construction View of construction workers working on Hoover Dam. They are building railroad tracks at the site. Equipment and a truck can be seen.
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Hoover Dam workers on canyon floor Shows workers using drills on the floor of Black Canyon at the Hoover Dam construction site.
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Inside a diversion tunnel -- Hoover Dam construction Shows a construction worker and power shovel inside a diversion tunnel at the Hoover Dam construction site.
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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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Workers on the Colorado River A view of construction workers towing a generator behind the boat that they are using to cross the Colorado River.
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Commemoration of the pouring of the second millionth cubic yard of concrete in Hoover Dam Hoover Dam construction workers observe as Six Companies officials stand in the construction site by a concrete pouring bucket which bears a sign reading: "United States Dept. of Interior, Bureau of Reclamation, Boulder Canyon Project. Pouring 2nd millionth cu. yd....
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Construction on crest of Hoover Dam View of the concrete work on the crest of Hoover Dam. Men and construction equipment are visible.
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Hoover Dam construction View of construction in Black Canyon at the Hoover Dam site. Construction workers are standing by the railroad tracks looking at a dynamite blast that is taking place in the distance. The Colorado River is visible as...
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Hoover Dam construcion -- blasting Shows the construction of Hoover Dam. One of the portals of the diversion tunnels is visible. Dynamite blasting is taking place in the canyon and trucks and various construction buildings are visible on the cofferdam. Also shows some...
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Pouring concrete -- Hoover Dam 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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Lewis Construction Company drilling railroad tunnels of U.S. Construction Railroad to Hoover Dam. Construction workers using construction equipment to drill railroad tunnels.
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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.
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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...
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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.
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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.
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Workers and drilling jumbo inside diversion tunnel no. 4 Construction workers are seen working with a drilling jumbo inside diverson tunnel no. 4.
 

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