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201 Object thumbnail
Aerial view of the upper cofferdam on the Colorado River in Black Canyon Aerial view of the upper cofferdam on the Colorado River in the Hoover Dam construction site in Black Canyon. Cables are seen crossing the canyon, and a small wooden shack is seen on the cliff face in the foreground.
202 Object thumbnail
Concrete pouring forms in the Hoover Dam construction site in Black Canyon Aerial view of the Hoover Dam construction site in Black Canyon showing multiple concrete pouring forms in front of a cofferdam. Draglines and trucks can be seen on the canyon floor, and overhead cableways carry cargo across the site.
203 Object thumbnail
Cut-off trench at upstream side of Hoover Dam. Construction workers and equipment are seen in a cut-off trench in the upstream side of the Hoover Dam construction site.
204 Object thumbnail
Concrete pouring forms below a cofferdam in the Hoover Dam construction site Construction workers are seen working on the concrete pouring forms below a cofferdam in the Hoover Dam construction site. Concrete begins to set in the forms. A dragline can be seen in the distance and lines for high scalers are...
205 Object thumbnail
Nevada Spillway, looking upstream. Construction of the Nevada Spillway in the Hoover Dam construction site. Concrete pouring forms are seen attached to the partially-finished concrete wall A dragline is seen at the site and one construction worker scales the finished concrete wall. Numerous...
206 Object thumbnail
Water flowing into Colorado River, June 16, 1933 The Colorado River flows out of the diversion tunnels in the Hoover Dam construction site in Black Canyon. Bridges are seen crossing the river and the canyon.
207 Object thumbnail
Arizona Spillway, looking upstream. View of construction of the Arizona Spillway in the Hoover Dam construction site. Concrete pouring forms and steel rods protruding from the unfinished spillway walls are seen around the partially finished concrete walls. Dirt roads and temporary buildings can be...
208 Object thumbnail
Hoist House and Nevada Anchorage, Government Cableway. Cables run through a tower in Black Canyon. Two men stand at the foot of the anchoring cables outside a hoisting mechanism building in the Hoover Dam construction site. Trucks and temporary buildings are seen outside the hoisting house.
209 Object thumbnail
Trains on Elevation 720 Railroad Bench, hauling conrete to Hoover Dam. Freight cars carrying buckets of concrete are seen on a temporary railway built onto the canyon wall at the Hoover Dam construction site. Concrete setting in pouring forms in the dam site and construction workers are seen below.
210 Object thumbnail
Aerial view of concrete pouring in the Hoover Dam construction site Aerial view of the Hoover Dam construction site in Black Canyon showing multiple concrete pouring forms. Various trucks and vehicles are seen on the canyon floor and a temporary railway bench is seen on the cliff wall on the left...
211 Object thumbnail
Concrete pouring forms in the Hoover Dam construction site View of multiple concrete pouring forms in the Hoover Dam construction site in Black Canyon. A concrete pouring bucket is suspended over the site by a cableway. A temporary railway bench is seen in the canyon wall in...
212 Object thumbnail
Looking upstream at the Arizona Spillway. View of construction of the Arizona spillway. Concrete pouring forms are attached to the partially finished concrete walls. A dirt road and temporary buildings can be seen in the background.
213 Object thumbnail
Looking upstream at the Nevada Spillway. View of construction of the Nevada Spillway in the Hoover Dam construction site in Black Canyon. Concrete pouring forms and steel rods protruding from the unfinished spillway ways are seen around the finished parts of the concrete walls. Cables...
214 Object thumbnail
Government cableway and hoisting house Photo shows tower and cableway, a hoisting house, and several other structures and some vehicles. There are mountains and rocks in the scene.
215 Object thumbnail
Concrete plant Shows the blending plant on the side of Black Canyon; it is part of the Himix Concrete Plant.
216 Object thumbnail
Hoover Dam cooling tower and refrigeration plant during construction View of Hoover Dam during construction, looking downstream. The cooling tower and refrigeration plant are visible; also shows concrete forms, high scaling equipment, and various consruction materials and trucks. There is a man in the lower left-hand corner...
217 Object thumbnail
Nevada spillway during construction of Hoover Dam Photo shows men working on the Nevada spillway weir. There are concrete forms, various buildings, construction equipment, and a truck in the scene.
218 Object thumbnail
Hoover Dam construction View of the construction of Hoover Dam, looking upstream. Shows concrete forms, high scaling equipment, construction roads, and a train winding along the side of the canyon. The Colorado River is visible above the construction site; various...
219 Object thumbnail
Hoover Dam during construction Construction photo of Hoover Dam. Shows a train winding along the canyon, concrete forms, buildings and structures above the dam, construction roads, high scaling equipment and a cable suspended over the canyon. The Colorado River is visible above...
220 Object thumbnail
Hoover Dam construction -- cooling tower and refrigeration plant Shows close-up of Hoover Dam cooling tower and refrigeration plant during construction. Photo was taken looking downstream. Buildings and structures and cables are in the photo. Includes the caption, "Telephoto view of Boulder Dam, cooling tower and refrigeration...
221 Object thumbnail
Arizona spillway during construction of Hoover Dam Close-up of the Arizona spillway during construction. Roads and buildings are visible.
222 Object thumbnail
Nevada spillway during construction of Hoover Dam Close-up of the Nevada spillway, looking downstream, during the construction of Hoover Dam. Cables, construction equipment, and roads are visible.
223 Object thumbnail
Interior of spillway tunnel, Hoover Dam site Shows concreting equipment inside No. 1 spillway tunnel during the construction of Hoover Dam.
224 Object thumbnail
Hoover Dam during construction View of Hoover Dam site, looking upstream. A railroad winds along the canyon and the Colorado River is visible above the dam site. Buildings and structures, high scaling equipment, and concrete forms are also visible.
225 Object thumbnail
Diversion tunnel at Hoover Dam Looking into the interior of a partially constructed diversion tunnel. There appears to be some sort of scaffolding for construction workers to stand on and the tunnel is illuminated by electric lighting.
226 Object thumbnail
Men working on Hoover Dam. This photo shows two construction workers operating equipment used in the construction of Hoover Dam.
227 Object thumbnail
Men operating heavy equipment at Hoover Dam site. he photo shows two construction dump trucks sitting in front of heavy equipment. This machinery appears to have some sort of pulley apparatus with a bucket attached for hauling dirt or rocks from the construction site. There are two construction...
228 Object thumbnail
Boulder Canyon. A view of the Colorado River flowing through Black Canyon. In the forground are construction workers standing on a wooden trestle that is built along side the canyon wall. The workers appear to be dumping dirt from the trestle into...
229 Object thumbnail
Boulder Canyon. View of the Colorado River in Black (not Boulder)Canyon.
230 Object thumbnail
Close-up of man working on construction of Hoover Dam. This photograph shows a close-up of a construction worker's hands as he places a rock into the end of a tool. Beneath the workers hands is a wooden form that is partiioned off and holds various size rocks.
231 Object thumbnail
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.
232 Object thumbnail
Blast at Hoover Dam site. This photograph shows blasting of a hillside at the Hoover Dam site.
233 Object thumbnail
Worker operating heavy equipment at Hoover Dam site. This shows a construction worker operating a construction tractor which is loading dirt and rocks into the scoop on the front of the tractor.
234 Object thumbnail
Boulder Canyon. View of the Colorado River flowing through Black Canyon (not Boulder Canyon).
235 Object thumbnail
Construction worker at Hoover Dam. A construction worker is operating a construction tractor with an attached trailer that is filled with boulders, rocks and dirt.
236 Object thumbnail
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.
237 Object thumbnail
Aerial view of Colorado River in Boulder Canyon. An aerial view of the Colorado River flowing through Black Canyon (not Boulder Canyon).
238 Object thumbnail
Aerial view of Boulder Canyon. Aerial view of the Colorado River flowing through Black (not Boulder) Canyon.
239 Object thumbnail
Boulder Canyon floor after water from river had been diverted. A view of Black (not Boulder)Canyon floor after the Colorado River has been diverted. Construction scaffolding can be seen in the lower right of the photograph.
240 Object thumbnail
Floor of Black Canyon This shows a view looking down into Black (not Boulder) Canyon during early stages of construction of Hoover Dam. The Colorado River is in the process of being diverted and construction equipment and workers can be seen in the foreground.
241 Object thumbnail
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.
242 Object thumbnail
Black Canyon A view of the Colorado River flowing through Black (not Boulder) Canyon. On the right side of the canyon there is a road with two automobiles, some construction equipment, and a construction worker.
243 Object thumbnail
Hoover Dam under construction View taken high above Hoover Dam construction site showing the forms for poruing the concrete. There are trucks, buildings, a railroad, and roads visible. The Colorado River can be seen above the site. Other construction equipment shown includes...
244 Object thumbnail
Interior of diversion tunnel during Hoover Dam construction View of interior of diversion tunnel No. 3 during the construction of Hoover Dam.
245 Object thumbnail
Hoover Dam during construction View of the Hoover Dam construction site from high above showing forms for the poring of the concrete, looking downstream. There are trucks, a train along the canyon wall, and buildings in the picture. Construction equipment includes...
246 Object thumbnail
Spillway weir under construction -- Hoover Dam site Shows the Nevada spillway weir under construction. Scaffolding, temporary stairways, a construction shed, and other equipment can be seen.
247 Object thumbnail
Construction of intake towers and spillway -- Hoover Dam site Site where the intake towers and the spillway on the Arizona side of the dam are being built. Construction roads, high scaling equipment, and other construction equipment can be seen.
248 Object thumbnail
Construction of Hoover Dam intake towers Photo shows the site of the construction of the intake towers on the Nevada side of the dam. High scaling equipment, a crane, scaffolding, construction buildings and equipment are visible.
249 Object thumbnail
Hoover Dam construction View of the Hoover Dam construction site from high above the canyon. The Colorado River is visible above the dam site. A cable spans the canyon, there is a train winding along the canyon wall, and construction roads...
250 Object thumbnail
Hoover Dam under construction Aerial photo of the Hoover Dam construction site showing forms for poring concrete. Forms for the power house gallery are visible. A train winds along the canyon wall, there is high scaling equipment on the walls, and the...
 

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