Highway near Hoover Dam

Shows a highway through the mountains near Hoover Dam.

Diversion tunnels under construction - Hoover Dam

Exterior view of diversion tunnels at the Hoover Dam site during construction. Photo shows the Colorado River and scaffolding around the partially constructed tunnels.

2024-11-01

Construction scene at Hoover Dam site

Shows construction crew and equipment at the Hoover Dam site. Power lines are also in the scene.

2024-11-01

Construction site at Hoover Dam

Photo shows various buildings and structures, railroad tracks, trucks and power lines. There is blasting taking place in the background between the mountains.

2024-11-01

Somewhere near present-day Hoover Dam

Shows mountains and sand, somewhere in the vicinity of present-day Hoover Dam.

2024-11-01

Construction work at Hoover Dam site

Shows several buildings and structures on a rocky hillside on the bank of the Colorado River. They were involved in the construction of Hoover Dam.

2024-11-01

High scalers preparing anchorages in Black Canyon

Three high scalers prepare rope anchorages for future scaling work one thousand feet above the Colorado River in Black Canyon.

1932-08-22

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.

1932-08-15

Future Hoover Dam reservoir area seen from Black Canyon

View from Black Canyon of the area which, when submerged, will become the Hoover Dam reservoir. In the foreground, a car is seen traveling a dirt road, and a lone construction worker views the scene from atop the rocks. The hills in the...

1932-08-15

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 across the canyon. A truck is seen...

1932-08-24

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.

1932-08-24

Close-up of rock blasting in Black Canyon, taken from the Black Canyon Highway

Close-up of enormous smoke and dust clouds filling Black Canyon during rock blasting for construction of Hoover Dam.

1932-08-16

Rock blasting on the Arizona side of Black Canyon

View of Black Canyon and the Colorado River; smoke and dust clouds fill the canyon at the site of rock blasting for the Arizona intake towers. A steel suspension bridge is seen crossing the river upstream.

1932-08-16

Detail of a sidewall jumbo inside diversion tunnel no. 3

Close-up of a section of a side-wall jumbo inside a diversion tunnel set for concrete pouring of the tunnel's side walls. The form is 80 feet long and consists of four 20-foot sections bolted together. Measurements are marked on the edges of the...

1932-04-29

Detail of side-wall jumbo inside diversion tunnel

Detail of a side-wall jumbo used for pouring concrete lining inside a diversion tunnel. The side wings of the jumbo are jacked into place, and concrete is poured through ports by means of a traveling crane and 2 yd. buckets.

1932-04-28

Section of a concrete-pouring jumbo standing outside of a diversion tunnel

A completed section of a form, or "jumbo," for pouring of concrete to create the diversion tunnel arches stands upon trestles in Black Canyon. Construction workers are seen working on the form.

1932-05-20

Dragline loading gravel into railroad side dump cars

View of an electric dragline loading railway side dump cars in the gravel pit in Black Canyon. Mikado type locomotives pull 10-car trains, 3 trains of this type [were] in operation.

1932-05-03

Railroad freight cars carrying gravel across a trestle bridge on the Colorado River

A locomotive pulls freight cars loaded with gravel across a trestle bridge on the Colorado River toward the screening plant. A round trip took slightly over two hours.

1932-05-03

Man standing on trestle bridge on the Colorado River pointing at anchoring cables

A man stands on the trestle bridge near the gravel pit and points at the cables attached to the upstream face of the bridge used to anchor the bridge in case of high water. Three-inch cables [were] anchored to concrete "dead-men" and horizontal...

1932-05-15

Locomotives at the gravel plant yard

Four standing locomotives are seen on the railway tracks in the gravel plant yard. A freight car can be seen behind one of the locomotives.

1932-05-15

High scalers on the Nevada side of Black Canyon

High scalers work on the canyon wall on the Nevada side of Black Canyon, excavating for construction of an intake tower. Bridges can be seen in the distance crossing the Colorado River.

1932-04-01

High scalers on the Nevada side of Black Canyon above the Colorado River

Close-up of high scalers working on the Nevada side of Black Canyon, 700 feet above the Colorado River. Two bridges are seen crossing the river below.

1932-04-01

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.

1932-04-01

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.

1932-04-01

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.

1932-11-13