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301 Object thumbnail
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.
302 Object thumbnail
Close-up of construction site, Hoover Dam. This is a close-up of open end round metal forms that are sitting in a ditch. The metal forms are surrounded by a wooden enclosure.
303 Object thumbnail
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.
304 Object thumbnail
Boulder Canyon This photograph shows a view of the Colorado River in Black (not Boulder) Canyon.
305 Object thumbnail
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.
306 Object thumbnail
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...
307 Object thumbnail
Laying pipe for Boulder City's water supply. A view of construction workers digging trenches across the desert floor to lay water pipelines. There are several dirt roads in the area and there has already been some pipeline laid. In the background is the surrounding mountains.
308 Object thumbnail
Warehouse under construction A view of a warehouse under construction in the desert around Boulder City. The building is framed and 1/2 of the exterior walls are up.
309 Object thumbnail
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.
310 Object thumbnail
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....
311 Object thumbnail
Inside machinery room at Hoover Dam site This shows a room filled with machinery. There is a huge motor attached to the floor and there are large wheel turning valves shown on the right side of the photograph. In the background, the rear of the room appears...
312 Object thumbnail
Machinery at Hoover Dam site. This photograph shows a pipeline at the Dam site. The pipeline appears to have a valve that can be opened or shut with a wheel turning device. The pipeline appears to be attached to a concrete form shown in the...
313 Object thumbnail
Bridge across Boulder Canyon at Hoover Dam site. A bridge stretches from one side of Black (not Boulder) Canyon to the other side, with the Colorado River flowing beneath. The background shows scaffolding against the mountainside. A building sits against the mountain at the far end of the...
314 Object thumbnail
Workers on the Colorado River A view of construction workers towing a generator behind the boat that they are using to cross the Colorado River.
315 Object thumbnail
View of railroad tracks being laid at Hoover Dam site. A view of railroad tracks on the side of the mountain leading into a tunnel in the background. Both walls of the canyon are visable and the Colorado River is flowing through the bottom of the canyon. In the foreground...
316 Object thumbnail
View of a power house at the Hoover Dam construction site Shows the Nevada power house under construction at the dam site. Various buildings, concrete forms, and the wall of the rising dam can be seen. Behind the dam, part of an intake tower is visible as well...
317 Object thumbnail
Nevada power house at Hoover Dam construction site View of construction of the Arizona power house at the dam site. Hoisting equipment, cables, trucks and construction workers can be seen. Various buildings and structures are pictured as well as roads and concrete pouring forms.
318 Object thumbnail
Downsteam view of Hoover Dam, showing power house construction View of Hoover Dam and power house under construction. Buildings and structures, concrete pouring forms, cables, and a crane can be seen. Some construction workers and trucks are also pictured. Above the dam part of an intake...
319 Object thumbnail
Power house under construction - Hoover Dam site Shows partially completed power house at the Hoover Dam site. A construction worker, ladders, cables and building materials such as lumber are visible.
320 Object thumbnail
Intake towers being constructed for Hoover Dam View of construction of the Arizona intake towers from the Nevada side of Black Canyon. Part of the dam is visible in the lower right corner. High scaling equipment, temporary bridges, hoisting equipment and cables can be seen.
321 Object thumbnail
Nevada intake towers under construction at Hoover Dam Shows the construction of the Nevada intake towers, taken from the Arizona side of the canyon. Trestles, cables, hosting equipment and temprary bridges are visible. Below the towers there is a temporary railroad.
322 Object thumbnail
Interior view of a power house -- Hoover Dam construction site Shows interior of a power house under construction. A construction worker is visible between the reinforcing steel and pipes.
323 Object thumbnail
View of power houses being constructed at the Hoover Dam site General view of the construction of Hoover Dam, looking upstream. The power houses are being built in this phase. A cableway spans the canyon carrying a tram across. There are several buildings, construction workers, and trucks visible....
324 Object thumbnail
Power house under construction at Hoover Dam site Close-up view of a power house under construction at Hoover Dam. Shows concrete pouring forms and the pouring arrangement. There is a construction building and a construction worker in the lower left corner.
325 Object thumbnail
Himix and cement blending plants -- Hoover Dam site General view of the Himix and cement blending plants. A train and aggregate bins are visible above on the side of the canyon.
326 Object thumbnail
Aerial view of the Hoover Dam construction site looking upstream on the Colorado River Aerial view of the Hoover Dam construction site in Black Canyon. Construction on the intake towers is seen in the canyon walls behind the dam face and construction on the power houses is seen in the river bed in the...
327 Object thumbnail
Aerial view of the Hoover Dam construction site looking downstream from the Arizona side Aerial view of the Hoover Dam construction site, looking downstream on the Colorado River in Black Canyon. Construction on the intake towers on both sides of the dam face is shown. The top of the dam face is covered with...
328 Object thumbnail
Close-up of no. 3 Arizona intake tower, showing the cylinder gates being placed. Close-up of construction on the no. 3 Arizona intake tower. Steel framework and rods protrude from the top of the tower.
329 Object thumbnail
Close-up of the Arizona intake towers, from the high catwalk. Close-up of construction on the Arizona intake towers.
330 Object thumbnail
Hoover Dam construction site viewed from the downstream cofferdam View of the Hoover Dam construction site in Black Canyon from the downstream cofferdam. Construction on one of the Nevada intake towers can be seen behind the concrete dam face. Framework and concrete pouring forms are seen on construction on...
331 Object thumbnail
Construction on the Nevada power house View of construction on the Nevada power house. Framework and concrete pouring forms cover the site. Penstock tunnel openings are visible in the canyon wall in the background. Construction equipment, vehicles, temporary buildings and construction workers are seen on the...
332 Object thumbnail
Construction on the Nevada power house in the downstream cofferdam View of construction on the Nevada power house in the downstream cofferdam in the Hoover Dam construction site. Framework and concrete pouring forms cover the powerhouse site. Unfinished penstock tunnel openings are seen in the bottom of the canyon wall...
333 Object thumbnail
Construction on the Arizona power house View of construction on the Arizona power house. Framework and concrete pouring forms cover the powerhouse site. The dam face is seen in the background. Construction workers and equipment, vehicles and temporary buildings are seen in the downstream cofferdam.
334 Object thumbnail
Construction on the Arizona spillway Close-up of the partially-completed construction on the Arizona spillway.
335 Object thumbnail
Construction on the Nevada spillway View of construction on and around the partially-completed Nevada spillway. Construction workers can be seen working on the cylinder gates in the middle of the spillway. An electric dragline is seen on a trestle near the bottom of the spillway.
336 Object thumbnail
Section of penstock pipe being lifted by cable Construction workers supervise the lifting of a 30-foot section of penstock pipe from a trailer by a cableway in the Hoover Dam construction site.
337 Object thumbnail
Commemoration of the pouring of the second millionth cubic yard of concrete in Hoover Dam Hoover Dam construction workers observe as Six Companies officials stand in the construction site by a concrete pouring bucket which bears a sign reading: "United States Dept. of Interior, Bureau of Reclamation, Boulder Canyon Project. Pouring 2nd millionth cu. yd....
338 Object thumbnail
Aerial view of construction on the top of Hoover Dam Aerial view of construction on the top of the Hovoer Dam. Construction workers watch as a concrete pouring bucket, seen on the left side of the picture, is hoisted over the site. The Arizona intake towers are visible in the...
339 Object thumbnail
Construction workers on the drum gates in the Arizona spillway Two construction workers standing on a suspended scaffold work on the drum gates on the Arizona spillway.
340 Object thumbnail
Construction on the Nevada spillway View of construction on the Nevada spillway in Black Canyon. An electric dragline is seen on a trestle in front of the spillway.
341 Object thumbnail
Aerial view of the Hoover Dam construction site viewed from downstream on the Colorado River Aerial view of the Hoover Dam construction site taken from downstream on the Colorado River in Black Canyon. Construction on the Nevada and Arizona power houses is shown in the foreground in the cofferdam. Concrete pouring forms cover the top...
342 Object thumbnail
Construction on the no. 4 penstock raise Close-up of framework inside the unfinished opening of a penstock tunnel. Construction workers can be seen in the foreground on what appears to be a transportation track.
343 Object thumbnail
Construction on the Arizona spillway View of construction on the Arizona spillway in Black Canyon. An electric dragline can be seen at the top left of the dirt road above the spillway. Construction on one of the penstock tunnels can be seen inside the spillway.
344 Object thumbnail
Construction on the no. 4 penstock raise View of construction workers on framework inside the no. 4 penstock tunnel portal during construction of Hoover Dam.
345 Object thumbnail
Construction on the four intake towers in Hoover Dam View from the Arizona side of the Hoover Dam construction site of work on the four intake towers. Steel framework rises from the top of each intake tower. Part of the Nevada spillway is seen in the upper right. Construction...
346 Object thumbnail
Construction on the Nevada and Arizona power houses in the downstream cofferdam below Hoover Dam View from the downstream cofferdam of the Hoover Dam construction site. Construction workers, temporary buildings, electric draglines, vehicles and other construction equipment are seen in the cofferdam. Framework rises from the tops of the power houses on both sides of...
347 Object thumbnail
Close-up of the Nevada powerhouse, showing the draft tubes. Close-up of construction on the Nevada powerhouse. Construction workers stand amid piles of lumber on the ground. Wood and steel framework is seen at the top of each draft tube in the power house.
348 Object thumbnail
Construction on the Nevada power house viewed from the Arizona valve bench View of construction on the Nevada power house seen from the Arizona valve house bench. Framework rises from the top of the power house. Temporary buildings can be seen in the cofferdam in front of the power house. Part of...
349 Object thumbnail
Construction on the Arizona power house viewed from the Nevada valve house bench View of construction on the Arizona power house seen from the Nevada valve house bench. Framework rises from the top of the power house. Temporary buildings, construction equipment and vehicles can be seen in the cofferdam in front of the...
350 Object thumbnail
Construction on the Arizona spillway and the no. 4 penstock raise in Black Canyon View of construction on the Arizona spillway and the no. 4 penstock raise. Black Canyon surrounds the construction site. An electric dragline and trucks are seen on the dirt road above the spillway.
 

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