Search for all of "Black Canyon", all of "Roads", all of "Trucks"

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Rock blasting in Black Canyon View from a dirt road of rock blasting in Black Canyon. Electric power poles and lines run along the road and other cables are suspended over the canyon. A truck is seen in the foreground.
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Panorama view, showing Six Companies Inc. work on the Arizona side of Black Canyon Highway. Panoramic view of construction work on the Arizona side of the Black Canyon Highway. Construction workers, dump trucks, electric draglines, temporary buidlings and an automobile are seen in the vastness of the desert mountains.
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Construction on the Arizona spillway and the no. 4 penstock raise in Black Canyon View of construction on the Arizona spillway and the no. 4 penstock raise. Black Canyon surrounds the construction site. An electric dragline and trucks are seen on the dirt road above the spillway.
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Construction of Hoover Dam View of construction on the canyon floor of Black Canyon. Trucks and roads are visible. Some buildings can be seen also. The concrete pouring forms and a cofferdam are also visible.
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Blasting on the Arizona side of the cableway bench excavation View from the lower portal of railroad tunnel no. 1 of rock blasting on the Arizona side of Black Canyon. Power poles and power lines are seen lining a dirt road leading to the blasting site. Other cables hang...
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View of construction on roads around the Arizona spillway View of construction on roads around the completed Arizona spillway, looking downstream on the Colorado River in Black Canyon. Curbs and guard rails are being installed. A dragline, two dump trucks and a temporary building are seen near the spillway....
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Preliminary construction at Hoover Dam site "Down-stream from Observation Point -- note tunnel in center of picture. Trucks hauling muck from Nevada portals must go through this tunnel to dumping grounds one mile away. [150 feet to river straight down]"-- [hand-written inscription on back...
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Hoover Dam construction "Down stream from Observation Point. Buildings on the right side are water sedimentation plants. Water treated for Boulder City. Left side is Arizona side of River." [hand-written inscription on back of photo] This photo was taken high...
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Hoover Dam construction equipment Shows a box of equipment being lowered into Black Canyon during the construction of Hoover Dam. Cables, roads, and a truck are visible.
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Early stages of construction of Hoover Dam Handwritten inscription on back of photo: "Hoover Dam -- Down the Colorado River. Dump trucks are on Arizona side and hauling muck to dumping grounds -- no muck can be dumped in the river." The road along...
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Aerial view -- Hoover Dam construction Aerial view of Hoover Dam, Black Canyon, and the Colordo River during the construction of the dam. Two portals of the diversion tunnels are visible. There are trucks and buildings on the cofferdam. The face of the...

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