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How Boulder Dam power will refinance Colorado River Project : statement to Congressional Colorado River... Primarly charts and tables showing how the building of Boulder Dam will pay for itself in power usage in Southern California. Predicts on population growth in the area. Includes a letter from the publisher of the Los Angeles Examiner.
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Diversion tunnels during Hoover Dam construction Photo shows the Arizona diversion tunnels during the construction of Hoover Dam. Two men, railroad trucks, a temporary bridge, some temporary structures and a cable over the canyon are also shown.
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Construction crews in Boulder Canyon. Photo shows a power shovel and dump truck doing construction work in Black Canyon (not Boulder Canyon).
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Colorado River basin : hearings before the Committee on irrigation and reclamation, House of representatives,...
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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.
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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...
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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...
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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.
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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.
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Construction of the power house foundation in Hoover Dam View from downstream on the Colorado River of construction on Hoover Dam. The dam wall is covered with scaffolding, ladders, concrete pouring forms and other construction equipment. The base of the power house is seen in the foreground.
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Construction on the Arizona 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 left, with concrete pouring forms and other construction equipment. Construction of the Arizona power...
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Union Pacific "Train of Tomorrow" -- Hoover Dam site Shows the "Train of Tomorrow" at the upstream face of Hoover Dam, where concrete is transferred from trains to the dam. Hoisting machinery, high scaling equipment, and train trestle can be seen. There is a group of people...
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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...
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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....
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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. Construction on the power houses in the lower cofferdam is seen in the foreground. The roof of a temporary building is seen in...
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Night photograph of power house construction. Night view of the Hoover Dam construction site viewed from the lower cofferdam. Electric lights illuminate the dam face, the canyon walls and construction on the Nevada and Arizona power houses below. Temporary buildings are seen in the foreground on...
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Upstream face of Hoover Dam, during construction View of Hoover Dam construction from the Arizona side of the canyon. The upstream face of the dam is visible. The intake towers are nearing completion. Temporary bridges, scaffolding, a train trestle, and trams traveling across...
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View of Hoover Dam during construction View of Hoover Dam construction site with the intake towers and Colorado River visible above. The power houses are under construction at the base of the dam. A cable spans the canyon and several construction buidngs are shown....
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Looking downstream into the Nevada spillway. Shows construction on the spillway on the Nevada side. Shows derrick cranes, cables overhead, part of the dam, and the intake towers under construction.
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Hoover Dam, looking upstream from Lookout Point Shows the face of the dam with construction going on on the intake towers and the power houses. Also shows cableways and mountains behind dam.
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Third millionth cubic yard of concrete being lowered to Boulder Dam A concrete pouring bucket lowers the third millionth yard of concrete used in the construction of Hoover Dam. Cableways, the intake towers under construction, mountains, and construction workers are also visible.
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View of the Nevada intake towers, taken from the Arizona side. View of two intake towers under construction. Left tower is further along than right. To far left can see temporary stairway going up the side of the canyon. In left foreground can see pouring forms for the...
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Interior of power house turbine gallery, Hoover Dam site Shows the interior of a power house turbine gallery during the construction of Hoover Dam.
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Interior of power house gallery, Hoover Dam site Shows the interior of a power house pump gallery being constructed at Hoover Dam. Shows wiring and electric lights.
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Cleanup site at lower portal of Hoover Dam Shows the cleanup work being done at the lower portal on the Nevada side of the canyon. A power shovel with men aboard is visible. Also cables and other equipment can be seen. The portal is jutting...
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View of power house from above -- Hoover Dam site Shows the power house and valve houses in a photo taken from the top of Hoover Dam. Buildings and concrete pouring forms are visible.
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Looking upstream from the Arizona spillway gate house towards construction on the upstream abatement wall View looking upstream from the Arizona spillway gate house towards construction on the upstream abatement wall in Black Canyon. An electric dragline is seen on the right behind the spillway. Concrete pouring forms are visible on the abatement wall...
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Diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion... View of the diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion tunnel no. 4 is being lowered (on the left). A line of construction workers can be seen standing on the bank of...
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Construction of Hoover Dam intake towers View of the construction of the intake towers at Hoover Dam, looking up from the floor of the canyon. The face of the dam is visible at left and hoisting machinery can be seen next to the towers.
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Overhead view of Colorado River and outlet works at Hoover Dam View, taken from high above the canyon, of the Colorado River and water spewing from the outlet works of Hoover Dam. Hoisting equipment is lifing a piece of construction equipment across the canyon.
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Construction on the Nevada valve house seen from the Arizona side of the Hoover Dam... View from the Arizona side of the Hoover Dam construction site of work on the Nevada valve house. Construction on the Nevada power house is seen in the lower right. Concrete pouring forms are visible on both structures. A temporary...
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Panorama view, showing Six Companies Inc. work on the Arizona side of Black Canyon Highway. Panoramic view of construction work on the Arizona side of the Black Canyon Highway. Construction workers, dump trucks, electric draglines, temporary buidlings and an automobile are seen in the vastness of the desert mountains.
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Close-up of construction on the Arizona valve house Close-up of construction on the Arizona valve house. Concrete pouring forms cover the top of the structure. Lumber is seen lying in the unfinished portals.
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View of mixing plant View of a mixing plant with agitators mounted on White trucks. Looking upstream.
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Hoover Dam -- valve outlet on the Arizona side View from the top of Hoover Dam showing water streaming from the outlet works in the valve house on the Arizona side. Also shows the Colorado River, the valve house on the Nevada side, and the tops of the Arizona...
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Interior of Six companies, Inc. machine shop Shows men working on heavy machines in a Six companies, Inc. machine shop.
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Hoover Dam -- upstream side Upstream side of dam showing intake towers that are almost finished. Reservoir (Lake Mead) has begun to fill, and a man is rowing a boat on the lake. There are derrick cranes visible on both sides of the canyon.
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Hoover Dam -- upstream side Upstream side of Hoover Dam showing the intake towers, which are almost finished. The reservoir (Lake Mead) has begun to fill, and a man is rowing a boat on the lake. There is a wooden walkway laid over piers or...
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Hoover Dam -- upstream side Shows upstream side of the dam with the almost-finished intake towers. Also shows the mouth of a diversion tunnel and derrick cranes on both sides of the canyon. The reservoir (Lake Mead) has begun to fill.
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Hoover Dam -- upstream side Shows upstream face of dam with almost-completed intake towers. The reservoir (Lake Mead) has started to fill, and a man is rowing a boat on the lake. The mouth of a diversion tunnel on the left side of the picture...
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Hoover Dam construction View of the upstream face of Hoover Dam during construction. A huge penstock pipe is being transported by a hoist. The power houses are visible as are the tops of the intake towers.
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Hoover Dam under construction View of Hoover Dam during construction. The power houses are visible; concrete work is progressing on them. The intake towers are peeking above the dam's upstream face. Cables span the canyon and there is a...
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Arizona valve house from the center of the low cat walk Concrete pouring forms being put in place for the construction of the Arizona valve house. A construction worker, a hook hanging from a crane, ropes for high scaling, and a ladder attached to the side of the cliff are visible.
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Looking across the downstream face of Hoover Dam, showing the utility towers and elevator shaft Shows construction with concrete pouring forms going on on the top of Hoover Dam. There is a blurred image of a construction worker in the upper right corner, and a cableway with some sort of bucket is above the dam....
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View of construction on the power houses View of construction on the power houses at the base of Hoover Dam. Construction on the Nevada and Arizona intake towers is also seen behind the dam face, where the Colorado River is held behind the upper cofferdam. Cables carrying...
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Close-up of construction on the dam face, showing cables overhead Close-up of construction on the downstream face of Hoover Dam, showing cables overhead. Construction on the tops of the Nevada and Arizona intake towers can be seen behind the dam face. Construction on the central portion of the power house...
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Construction on the lower dam face, intake towers and power houses View of construction on the lower face of Hoover Dam. Framework and concrete pouring forms for the power houses are visible at the base of the dam face. Construction on the Nevada and Arizona intake towers is seen behind the...
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Hoover Dam construction View of the construction of Hoover Dam. A box car is being lowered by hoist. The power houses are visible as are the intake towers. A cableway spans the canyon high above the site.
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Black Canyon prior to dam construction Shows a surveyor perched on the side of Black Canyon surveying the area preliminary to the construction of Hoover Dam. The Colorado River is visible below. On the back of the phot is hand-written "Rigger-rodman working with topographical...
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Construction workers in diversion tunnel, Hoover Dam site Shows construction workers posing on the drilling jumbo inside a diversion tunnel during the construction of Hoover Dam. Other men are standing on the floor of the tunnel looking up at the jumbo. Electric lights illuminate the tunnel.
 

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