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101 Object thumbnail
Close-up of Arizona intake towers A close-up view of the intake towers on the Arizona side of Hoover Dam during construction. They are nearly completed, but there is scaffolding at the top of the towers.
102 Object thumbnail
Spillway on Arizona side of Hoover Dam View of the spillway on the Arizona side of Hoover Dam, showing steel gates in position. Towers to supply electric power higher up the hill.
103 Object thumbnail
Colorado River near Black Canyon A man is standing on the bank of the Colorado River in Black Canyon.
104 Object thumbnail
Lower portals of Diversion Tunnels No. 3 and No. 4, during the flood. View of the flooded Colorado River in Black Canyon during construction on Hoover Dam. The portals of diversion tunnels nos. 3 and 4 are seen in the canyon wall and bridges and catwalks cross the river. Some buildings...
105 Object thumbnail
Looking across the river at the lower portal of Diversion Tunnel No. 3. View of the flooded Colorado River, facing the unfinished portal of diversion tunnel no. 3 during construction of Hoover Dam. A temporary building is seen on the riverbed in the flood waters.
106 Object thumbnail
Gas-air shovel caught in the flooded Colorado River A stranded gas-air shovel is seen standing in the flooding of the Colorado River riverbed during construction on Hoover Dam. The mouth of one of the diversion tunnels is seen in the canyon wall in the background. Other construction equipment...
107 Object thumbnail
Partially washed-out truck bridge across from diversion tunnels View from a partially washed-out truck bridge, looking across the flooded Colorado River during construction of Hoover Dam. The mouths of two diversion tunnels are seen in the cliff wall in the background.
108 Object thumbnail
Portion of the gravel pits on the Arizona side of the Colorado River A man is seen standing in the Hoover Dam construction site gravel pits on the Arizona side of the Colorado River. The hills in the background are across the river in Nevada, five miles away.
109 Object thumbnail
Dragline loading gravel An electric dragline is seen loading gravel into a railway dump car in a gravel pit. Some workers stand beside the equipment. Mountains are seen in the background.
110 Object thumbnail
Dragline loading gravel into side-dump car A dragline dumps gravel into the railway dump car in a gravel pit. Plymouth gasoline locomotive switching. Construction workers are seen observing the operation.
111 Object thumbnail
Train loaded with gravel leaving the gravel pits Locomotive pulling several dump cars loaded with gravel, leaving the gravel pits. The desert and mountains are seen in the background.
112 Object thumbnail
Trash rack structure being installed in front of diversion tunnel no. 2 Close-up of construction workers installing the foundations of a trash rack in front of the portal of diversion tunnel no. 2. This is where the first pay concrete was poured.
113 Object thumbnail
Construction near the upper portals of diversion tunnels no. 1 and no. 2 High scalers work on the cliff face above the unfinished portals of diversion tunnels no. 1 and no. 2. Construction equipment, trucks and workers are seen on the road in front of the tunnels. Rigging and ropes hang from...
114 Object thumbnail
Looking out of the interior of diversion tunnel no. 2, with gas-air shovel inside the... View out of the upper portal of the unfinished diversion tunnel no. 2. A Bucyrus-Erie 43-B gas-aire shovel is seen near the mouth of the tunnel and reflected in a pool of water inside the tunnel. A man...
115 Object thumbnail
Workers and drilling jumbo inside diversion tunnel no. 4 Construction workers are seen working with a drilling jumbo inside diverson tunnel no. 4.
116 Object thumbnail
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.
117 Object thumbnail
First-aid station and ambulance A medic or doctor is seen standing by an automobile that has been converted into an ambulance. The vehicle is parked directly outside a small building with the sign "First Aid Hospital" on it. Another building on scaffolding in...
118 Object thumbnail
Construction worker in bulldozer in front of diversion tunnel portal A construction worker sits in a Caterpillar bulldozer in front of an unfinished diversion tunnel portal.
119 Object thumbnail
Worker inside drill sharpening station A worker is seen inside a drill sharpening station using a drill sharpener. A hot forge is also seen inside the building in the foreground.
120 Object thumbnail
Construction of the highway which will cross the top of the dam View of construction on the highways which will cross the top of the dam in Black Canyon. A rubble stone masonry retaining wall is in place.
121 Object thumbnail
Looking downstream on the Colorado River running through Black Canyon prior to construction of Hoover... A man sitting on a rock ledge views the Colorado River running downstream through Black Canyon prior to the construction of Hoover Dam. Bridges and catwalks are suspened over the river and dirt roads can been seen on both...
122 Object thumbnail
Construction workers using a drilling jumbo inside a diversion tunnel Construction workers using a drilling jumbo to excavate one of the diversion tunnels.
123 Object thumbnail
Aerial view of Colorado River-Black Canyon Aerial view of the Colorado River in Black Canyon and the surrounding area.
124 Object thumbnail
View of Hoover Dam construction, early stage An aerial view of the Colorado River and Black Canyon during the early stages of Hoover Dam construction. The photo was taken from near the top of the dam site, on the Nevada site. It shows a building,...
125 Object thumbnail
Power substation during Hoover Dam construction View of a substation used to power Hoover Dam construction activities. Also shown are buildings and roads winding up into the mountains.
126 Object thumbnail
Aerial view of Black Canyon and the Colorado River An aerial view of the Colorado River winding through Black Canyon, showing future site of Hoover Dam. Shows mountains surrounding the canyon and in the distance.
127 Object thumbnail
Aerial view of Black Canyon and the Colorado River Aerial view of Black Canyon and the Colorado River, future site of Hoover Dam. Panoramic view of the mountains and surrounding countryside.
128 Object thumbnail
People at Lookout Point viewing Hoover Dam construction A group of people are peering over Lookout Point, watching the progress of the Hoover Dam construction. The dam construction is not visible.
129 Object thumbnail
Screened aggregate and sand in front of the gravel plant View of the gravel plant, with cars and trucks parked in the foreground. Piles of screened aggregate and sand are seen in the foreground, and a storage pile for raw aggregate is seen in the background. The mountains...
130 Object thumbnail
Night view of the gravel plant Night view of the gravel plant, which is illuminated with electric lights. Piles of raw aggregate and a building stand in the foreground.
131 Object thumbnail
Man on bank of Colorado River Shows a man standing on the bank of the Colorado River, near Black Canyon. He is wearing a backpack and holding a rock and a rock hammer. There are mountains in the background.
132 Object thumbnail
Men working on bank of Colorado River Two men are constructing what appears to be a dock on the bank of the Colorado River in lower Black Canyon. There are mountains in the background.
133 Object thumbnail
Colorado River in Black Canyon View of the Colorado River, five miles below the Hoover Dam site, in Black Canyon.
134 Object thumbnail
Colorado River in Black Canyon at sunrise Shows the Colorado River, 12 miles below Hoover Dam site. There are mountains in the background. This was taken at sunrise.
135 Object thumbnail
Colorado River in Black Canyon View of the Colorado River in Black Canyon, 7 miles below the Hoover Dam site.
136 Object thumbnail
Man on bank of Colorado River in Black Canyon A man carrying camping gear poses on the bank of the Colorado River in Black Canyon. This was taken 5 miles below the Hoover Dam site.
137 Object thumbnail
Surveyors overlooking Black Canyon. Two surveyors pose as they are working high above Black Canyon. The Colorado River is visible far below.
138 Object thumbnail
General view -- Boulder City. General view of Boulder City, Nevada, showing stores, Six Companies' dormitories, and other buildings. Several people and cars are in the picture. There appears to be snow on the ground.
139 Object thumbnail
Colorado River below Hoover Dam site Shows the Colorado River 12 miles below the Hoover Dam site. There are mountains in the background of the photo.
140 Object thumbnail
Boulder City, Nevada Shows man perched on hill overlooking Boulder City, Nevada. Houses and other buildings are visible. There are power lines overhead.
141 Object thumbnail
Electric shovel loading rocks into dump truck Close up of an electric power shovel loading rock and debris into a dump truck. A driver sits in the truck.
142 Object thumbnail
Worker sitting in dump truck being loaded by power shovel Close up of a construction worker sitting in a Mack truck which is being loaded with debris by a power shovel.
143 Object thumbnail
Dump truck unloading debris during construction of muck disposal road View of a dump truck unloading debris during construction of a roadway. One construction worker sits behind the wheel of the truck and two others stand by observing from the road.
144 Object thumbnail
Invert concrete pouring forms inside diversion tunnel Interior of a diversion tunnel, showing invert concrete pouring forms. Some construction workers can be seen in the foreground. The tunnel is illuminated by electric lights.
145 Object thumbnail
Gantry crane inside diversion tunnel no. 3 A gantry crane is seen inside a diversion tunnel during construction of Hoover Dam. A flat bed truck is seen on the tunnel floor in the foreground and construction workers stand by. The tunnel is illuminated by electric...
146 Object thumbnail
Invert forms inside diversion tunnel no. 3 Interior of diversion tunnel no. 3, showing invert forms used for pouring concrete slabs. A trimming jumbo used for aligning the gauge of the tunnels is seen in the background. The tunnel is illuminated by electric lights.
147 Object thumbnail
Blasting in the walls of Black Canyon for intake tower construction View of rock blasting in Black Canyon in preparation for construction of the Hoover Dam intake towers.
148 Object thumbnail
Blasting in Black Canyon seen from the Colorado River View of rock blasting in Black Canyon from downstream on the Colorado River.
149 Object thumbnail
Low level concrete mixing plant seen from the Arizona side of the Colorado River View taken from the cliffs on the Arizona side of the Colorado River of the low level concrete mixing plant. Roads and buildings are seen near the river bank on the Nevada side.
150 Object thumbnail
Concrete lining inside diversion tunnel no. 3 View of the interior of diversion tunnel no. 3, showing the invert and side wall sections of three-feet thick concrete lining. The tunnel is illuminated by electric lights. Two construction workers stand inside the tunnel.
 

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