Search for all of "equipment"

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	Title	Description
101	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...
102	Construction of diversion tunnels -- Hoover Dam site	View of construction taking place at the upper portals of the diversion tunnels for Hoover Dam. Power shovel, buildings, roads, and scaffolding can be seen. Only the exterior portions of the tunnels are visible.
103	Himix Concrete Plant at Hoover Dam site	View of the Himix Concrete Plant at the Hoover Dam site. The structure is mutli-storied and built into the side of the canyon. There is a flatbed truck with a cement bucket on the back and cement mixers...
104	Close-up of Hoover Dam construction	A close-up view of Hoover Dam construction. There is a railroad running along the canyon, concrete forms, a truck, and a building. Temporary stairways have been built into the canyon walls.
105	Construction of Hoover Dam intake towers	Shows site where the intake towers are being constructed on the Arizona side of Hoover Dam. Shows high scaling equipment and various structures including the boom derrick.
106	Nevada spillway weir section.	View of the weir section of the Nevada Spillway nearing completion. Construction equipment and concrete pouring forms are seen around the area. Two small buildings, one raised on a trestle and one below the spillway, are also visible. Two...
107	Close-up of Hoover Dam concrete pouring construction taken from the Arizona side, looking downstream	View from donwstream on the Arizona side of the Colorado River of concrete pouring construction on Hoover Dam. Construction workers are seen amid multiple concrete pouring forms and scaffolding. A suspended concrete pouring bucket is seen in the middle...
108	Close-up of slot at the upstream face of Hoover Dam	View of construction on the upstream face of Hoover Dam. Construction equipment, including a Marion type 490 electric dragline, concrete pouring forms, scaffolding and temporary buidlings are seen at the site.
109	Construction on upstream face of Hoover Dam	View of construction on the upstream face of Hoover Dam. Construction equipment, scaffolding and concrete pouring forms are seen on and around the dam wall. Temporary stairs are seen attached to the wall of Black Canyon on the...
110	Construction of the bases of the Arizona intake towers	View of construction on the bases of the Arizona intake towers in the Hoover Dam construction site in Black Canyon.
111	Arizona intake tower derrick.	View of construction on the Arizona intake towers, looking upstream on the Colorado River in Black Canyon. A derrick anchored in the intake tower base is seen above the canyon. A temporary bridge is also seen spanning the...
112	Construction on the Nevada intake towers	View of initial construction of the Nevada intake towers in the Hoover Dam construction site in Black Canyon. Temporary stairs are seen attached to the canyon wall, and a railroad bench is seen near the bottom of the canyon wall.
113	Construction on the upstream face of Hoover Dam	View of construction on the upstream face of Hoover Dam in Black Canyon. Scaffolding, concrete pouring forms and other construction equipment are seen around the site. Temporary buildings and trucks are seen in the foreground.
114	Construction on the downstream face of Hoover Dam	View of construction on the downstream face of Hoover Dam in Black Canyon. Scaffolding, ladders, concrete pouring forms and other construction equipment are seen at the site.
115	View taken looking upstream on the Colorado River of the Hoover Dam construction site	Aerial view taken looking upstream on the Colorado River in Black Canyon of the Hoover Dam construction site. Multiple concrete pouring forms and other construction equipment are seen on the dam face. Temporary buildings and a temporary bridge...
116	Close-up of two-way trailer	Two men stand beside an empty two-hundred ton two-way trailer next to a railroad track. An automobile is parked in front of an industrial building seen in the background, and other buildings are seen by the railroad track.
117	Excavation for downstream plug, Diversion Tunnel No. 2.	Interior of diversion tunnel no. 2, showing excavation work. Construction workers stand on and below scaffolding to reach the tunnel walls and ceiling. Trucks are seen on the tunnel floor. The site is illuminated by electric lighting. ...
118	View of two hundred ton two-way trailer, with test load	Several men inspect a two hundred ton two-way trailer loaded with construction materials. The trailer stands next to a railroad track, and in front an industrial building. Mountains can be seen in the background.
119	Excavation for downstream plug, Diversion Tunnel No. 3.	Construction workers are seen excavating the interior of diversion tunnel no. 3. The tunnel is illuminated by electric floodlights. Construction equipment is seen on the tunnel floor.
120	Construction on Hoover Dam, looking downstream on the Colorado River	Aerial view of the Hoover Dam construction site. Construction workers are seen amid concrete pouring forms and other construction equipment. Temporary stairs are attached to the wall of Black Canyon, and a railroad bench used for transportation of concrete buckets...
121	Construction on the Nevada spillway weir	View of construction on the Nevada spillway weir. Scaffolding, concrete pouring forms and other construction equipment are seen at the site.
122	Construction of the Arizona power house foundations	View of construction of the foundations of the Arizona power house in the Colorado River bed in Black Canyon. Concrete pouring forms stand in the river bed and other construction equipment can be seen. Construction workers can be seen at...
123	Construction on the foundation of the Arizona power house	View of construction on the foundations of the Arizona power house in the Colorado River bed in Black Canyon. Concrete pouring forms stand in the river bed below the partially finished face of Hoover Dam, and other construction equipment can...
124	Forms for Arizona power house retaining wall.	Close-up of the concrete pouring forms for the Arizona power house retaining wall. Some concrete has already been poured. Temporary buildings, construction workers and vehicles can be seen in the background at the foot of the Hoover Dam face.
125	View looking into power house block A-5.	Close-up of scaffolding and construction on one of the power houses in the Hoover Dam construction site. Sections of pipe and other construction equipment can be seen on the ground in the foreground.
126	Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River	Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River in Black Canyon. Concrete pouring forms and other construction equipment are seen on the partially finished dam face and in the river bed below it. Unfinished...
127	Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River	Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River in Black Canyon. Concrete pouring forms and other construction equipment are seen on the partially finished dam face and in the river bed below it. The...
128	Himix concrete mixing plant	View of the Himix concrete mixing plant building and silos at the Hoover Dam construction site. The railroad bench for transportation of buckets of concrete can be seen on the wall of Black Canyon above the plant. The corner of...
129	Concrete pouring forms inside lower no. 2 plug	Interior of lower no. 2 plug, illuminated by electric lighting. Concrete pouring forms for an arch and walls are seen. Other construction equipment is seen on the tunnel floor. A "700" is marked on the rock near the roof...
130	Closeup of cooling pipe layout in panel H-3.	Close-up of construction workers setting up concrete cooling pipes in the Hoover Dam construction site.
131	Excavation for bridge abutment in Arizona spillway.	Construction workers are seen above concrete pouring forms and scaffolding during construction of the Arizona spillway in Hoover Dam. An electric dragline can be partially seen in the upper left.
132	Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River	Aerial view of the Hoover Dam construction site, looking upstream on the Colorado River in Black Canyon. The partially finished dam face is covered with concrete pouring forms and other construction equipment. Unfinished penstock openings are seen in the canyon...
133	Construction on the Nevada intake towers	View from the Arizona side of the Hoover Dam construction site of work on the foundations of the Nevada intake towers in the wall of Black Canyon. A railroad bench for delivering concrete is seen near the bottom, in...
134	Construction on the Arizona intake towers and spillway	View of construction on the foundations of the Arizona intake towers and on the Arizona spillway in Black Canyon. The partially finished face of Hoover Dam is seen in the lower right.
135	Construction on the Nevada power house	View of the Hoover Dam construction site, looking upstream on the Colorado River in Black Canyon. The partially finished dam face can be seen on the right, with concrete pouring forms and other construction equipment. Construction of the Nevada power...
136	Construction on the power house footings	View of the Hoover Dam construction site looking upstream on the Colorado River in Black Canyon. The partially finished dam face is covered with concrete pouring forms and other construction equipment. Vehicles and temporary buildings are seen in the river...
137	Looking downstream over the top of Hoover Dam	Aerial view looking over the top of construction on the face of Hoover Dam. Construction workers can be seen amid concrete pouring forms and other construction equipment. A railroad bench for transportation of concrete can be seen in the lower...
138	Nevada spillway during construction of Hoover Dam	Shows the Nevada spillway in the background. Taken from the Arizona side of the dam, this view shows a temporary stairway, cables, hoisting machinery and other construction equipment.
139	Interior of penstock tunnel -- Hoover Dam construction site	Interior view of number 4 raise and plug showing construction. Construction workers can be seen at the far end of the tunnel.
140	Intake towers and spillway -- Hoover Dam construction	View of the intake towers and the spillway on the Arizona side of the dam during construction. Hoisting equipment, concrete forms, and high scaling equipment can be seen.
141	Nevada intake towers under construction	Shows the Nevada intake towers during construction. Taken from the Arizona side of the Hoover Dam site, hoisting equipment, a train trestle, a temporary stariway up the side of the canyon and concrete forms are visible. In the...
142	Hoover Dam intake towers during construction	Shows Hoover DAm and the Nevada intake towers during construction. Temporary stairways, train trestle, concrete forms, hoisting machinery and other construction equipment can be seen. "Monkey slide" spans the canyon and can be seen in the center...
143	Unloading huge pipes -- Hoover Dam site	Shows valve house outlet pipes being uloaded with a cableway. A construction worker is standing on top of a pipe as it is being lifted off a railroad car.
144	Aerial photo of Hoover Dam construction site	This aerial photo shows various parts of the dam under construction. Cableways, an overhead tram, various buildings and structures, railroad tracks, trestles, and concrete forms are visible. Also shows the Arizona spillway, Arizona intake towers, the Himix plant...
145	Train at Himix Concrete Plant -- Hoover Dam site	View of a train carrying cars loaded with sand. The train trestle is visible as well as the bins at Himix Concrete Plant where rock and sand are dumped.
146	Constructing highway to dam site	A view of construction workers operating tractors as they construct a highway across the desert floor during the summer of 1931.
147	Producing electricity at the construction site	This photograph shows 3 construction workers observing electric generators being hauled up the river bank on wooden tracks through the use of pulleys and ropes. The backround of the picture shows the Colorado River flowing though Black Canyon.
148	Building Black Canyon Highway to Hoover Dam site	This is a view looking at the walls of Black Canyon with the Colorado River flowing below. In the foreground of the picture there is a ledge or trail cut into the side of the mountain and there is a...
149	Construction workers at Hoover Dam.	This photograph shows workers operating a power shovel to dig dirt and rocks and put them in a truck at the Hoover Dam site. The picture also shows an air compressor.
150	Construction at Hoover Dam	This photograph shows construction workers using a hose attached to a tank filled with water to water down the dirt at the Dam site. The water tank is attached to a truck bed. Three workers are operating the water hose....