Results
351 - 375 of 1628 Items << < 10 11 12 13 14 15 16 17 18 19 > >>
351 - 375 of 1628 Items << < 10 11 12 13 14 15 16 17 18 19 > >>
|
Panoramic view of construction in the upper cofferdam of Hoover Dam in Black Canyon. A dragline is seen in the middle of the canyon floor. Several trucks, construction equipment and construction workers are also seen in the canyon.
1932-11-16
|
|
Construction site of Hoover Dam in Black Canyon, looking upstream. Above the site is the Colorado River. Shows concrete forms, a train winding along the wall of the canyon, various construction buildings, hoisting machinery, and a cable...
1933-09-15
|
|
View of multiple concrete pouring forms and framework for the intake towers on Hoover Dam. Construction workers, equipment, roads and structures can be seen in Black Canyon, and the Colorado River can be seen in the distance.
|
|
"Head tower hoist house and anchorage of permanent 150 ton cableway at Boulder Dam runs from upper end of hi[gh]mix gulch." (handwritten inscription on back of photo) Construction workers, trucks, and buildings are also visible.
|
|
Shows the Colorado River and Black Canyon during the early stages of the construction of Hoover Dam. A temporary bridge spans the river and some construction workers are on the shore.
|
|
Shows one of the portals to the diversion tunnels. A portion of the Colorado River is visible as well as construction workers and construction buildings.
|
|
View of the Hoover Dam construction site showing equipment being lowered by cable, buildings, and other construction equipment. The Colorado River is partially visible as is the cofferdam.
1933-05-22
|
|
Shows a man standing inside a diversion tunnel at the Hoover Dam site.
|
|
Shows transport trucks and construction workers in Black Canyon next to railroad tracks.
|
|
View looking upstream through diversion tunnel no. 2 at intersection with inclined tunnel from upstream Nevada intake tower (inscription on back of photo). Shows concrete pouring forms and one construction worker standing looking up the tunnel...
1934-01-31
|
|
Shows two construction workers doing concrete work at the Hoover Dam site.
1933-08-31
|
|
View of blasting at Black Canyon during construction of Hoover Dam. Part of the Colorado River is visible as are construction buildings and equipment on the side of the canyon.
1931-10-04
|
|
Upstream face of Hoover Dam when construction was still going on on the top of the dam and on the intake towers. The Arizona intake tower is on the left and the Nevada intake tower is on the right. A cableway is visible above the dam, and there...
1935-01-28
|
|
Rebar inside a diversion tunnel under construction. A blurry image of two construction workers is at the top of the picture.
1934-12-19
|
|
View of the upstream face of Hoover Dam during construction. The power houses are visible as are the tops of the intake towers. Cableways span the canyon high above the construction site.
|
|
Water streams form the outlet works of the Nevada valve house. Men stand near a wall by the Nevada power house and watch the water. The Arizona power house is also visible. There is a mountain in the background.
|
|
Close-up of construction on the Nevada valve house. Scaffolding and temporary stairways are seen outside the structure. Lumber lies inside unfinished portals.
1935-05-27
|
|
Shows the cleanup of the Arizona side of the lower portals. Buildings and trucks are visible. The portal juts out from the side of the canyon.
1935-08-26
|
|
Shows work on the no. 4 plug inside a diversion tunnel at the Hoover Dam site. Electric lights illuminate the scene and construction equipment is visible. It shows the method of pouring concrete.
1935-04-26
|
|
Number three plug and raise with the plug concrete in place. Also shows construction equipment.
1934-11-17
|
|
View of Hoover Dam during construction, showing the power houses. Various buildings and structures are visible as well as concrete forms and hoisting machinery. There is a cable stretched across the canyon.
1935-07-25
|
|
View of construction on the Arizona intake towers. Steel framework protrudes from the tops of the towers. A derrick crane is seen above the towers, and the Arizona spillway is visible in the background. Part of the dam face, covered with concrete...
1934-06-21
|
|
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 the dam face can be seen...
1934-09-27
|
|
View of construction on the Nevada spillway in Black Canyon. An electric dragline is seen on a trestle in front of the spillway.
1934-06-21
|
|
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...
1934-07-24
|
