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226 - 250 of 1090 Items << < 5 6 7 8 9 10 11 12 13 14 > >>
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View of one of the spillways at Hoover Dam. A man is standing on the bridge which spans the spillway. Transmission towers are visible on the hills above the spillway.
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View of the top of the dam from the Arizona side. Intake towers are observed on the Arizona and on the Nevada side. The reservoir (Lake Mead)is more than two-thirds filled with water. Automobiles are seen on the road across the top of the dam.
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Close-up view of the machinery which control the outlet works. Two men are pictured at the controls.
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Upstream view of Hoover Dam, showing the Arizona outlet works spewing water. The power houses and part of the entrance to one diversion tunnel are visible.
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View of a spillway at Hoover Dam with water spilling over. People are standing on the bridge, watching.
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View of the Arizona spillway and intake towers on the downstream side of the dam. Cars are visible on the road across the top of the dam and the reservoir (Lake Mead) is beginning to fill.
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President Franklin Roosevelt and other dignitaries inspect the dam at the dedication ceremonies.
2024-04-25
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Upstream side of dam showing intake towers that are almost finished. Reservoir (Lake Mead) has begun to fill, and a man is rowing a boat on the lake. There are derrick cranes visible on both sides of the canyon.
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Water pours from the outlet works on the Nevada valve house. Also shows the Nevada valve house, the tops of the power houses on the Nevada and Arizona sides, the Colorado River, and a road by the side of the river.
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Color transparency showing the upstream face of Hoover Dam. The dam is illuminated by electric lights making the crest of the dam, the intake towers, and the power house visible.
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This color transparency shows the top of the dam, intake towers, a spillway, and the part of the upstream face of the dam. There are cars parked on the road across the top of the dam and the reservoir is almost filled.
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Color transparency of the downstream face of the dam, showing the power house. Transmission tower for hyroelectric power and a cableway are visible.
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This is a photograph of a blueprint which shows the general layout of Hoover Dam. The photo includes a sectional elevation on center line of the river. Blueprint shows the dam, power plant, upper and lower cofferdam, intake towers, outlet works,...
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Expansive view of Hoover Dam taken from the side, looking across. The intake towers are prominent in the photo. Cars are visible on the road crossing the top of the dam. The mountains are in the background. Lake Mead has begun to fill.
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View from the top of Hoover Dam of construction on the power houses in the lower cofferdam and on the valve houses in the walls of Black Canyon. Temporary buildings and construction equipment are seen on the cofferdam floor. Roof trusses and...
1935-06-25
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View from the top of Hoover Dam of construction on the power houses in the lower cofferdam. Construction on the Arizona power house in the wall of Black Canyon can also be seen in the upper left. Temporary buildings and construction equipment are...
1935-06-01
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A construction worker is seen inside the Nevada valve house. Pipe ends protrude from parallel walls in the valve house and other pipes lie on the floor or on scaffolding. Planks and debris are also seen on the floor.
1935-06-24
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A night view of water spewing from the outlet works at Hoover Dam before the dam was completed. Electric lighting illuminates the scene. A man is leaning on the edge of the wall, peering into the water below.
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Night view of the construction of an intake tower at Hoover Dam. Electric lights illuminate the scene and hoisting machinery is visible.
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View from the downstream cofferdam of construction on the Arizona power house. Concrete pouring forms and steel framework stand on top of the power house foundation. The dam face and wall of Black Canyon can be seen in the background. Temporary...
1935-01-28
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Interior view of the Nevada valve house. Construction scaffolding surrounds the installation of the needle valves and gates. Two construction workers can be seen in the rear at an unfinished opening to the valve house.
1935-09-27
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Shows the power house and valve houses in a photo taken from the top of Hoover Dam. Buildings and concrete pouring forms are visible.
1935-08-26
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View through diversion tunnel no. 3 showing concrete plug poured to close the tunnel. On the upper left another tunnel angles into the main tunnel. Mud and debris coat the tunnels.
1934-05-25
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View from the bottom of the canyon looking upstream at the dam and the power house. Trucks, lumber, and a cable spanning the canyon are visible. Pieces of lumber are piled around the site.
1935-10-28
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Taken from high up, this photo shows the Arizona spillway, highway bridge, and Arizona highway. Mountains and roads can be seen in the background. Buildings, cables, and various types of construction equipment are shown.
1935-07-25
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