Search for all of "Tunnels", all of "Diversion Tunnels"

Grid | List | Tile

      Title Description
51 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.
52 Object thumbnail
Concrete lining inside diversion tunnel no. 2 View of the interior of diversion tunnel no. 2, showing the completed invert and side wall sections of concrete lining. The tunnel is illuminated by electric lights. On the tunnel floor, construction workers stand by a truck which is...
53 Object thumbnail
Concrete side wall lining in diversion tunnel no. 3 View of the interior of diversion tunnel no. 3, showing completed side wall sections of concrete lining. The tunnel is illuminated by electric lights. Concrete pouring forms and a gantry crane are seen in the rear of the tunnel.
54 Object thumbnail
Detail of a sidewall jumbo inside diversion tunnel no. 3 Close-up of a section of a side-wall jumbo inside a diversion tunnel set for concrete pouring of the tunnel's side walls. The form is 80 feet long and consists of four 20-foot sections bolted together. Measurements are marked...
55 Object thumbnail
Interior of diversion tunnel during Hoover Dam construction View of interior of diversion tunnel No. 3 during the construction of Hoover Dam.
56 Object thumbnail
Forms for transition at the downstream plug of Diversion Tunnel No. 2. Interior of diversion tunnel no. 2, illuminated by electric lights, showing construction workers with concrete pouring forms. The tunnel walls are partially finished.
57 Object thumbnail
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. ...
58 Object thumbnail
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.
59 Object thumbnail
Aerial view of Hoover Dam construction site looking upstream on the Colorado River Aerial view of Hoover Dam construction site looking upstream on the Colorado River in Black Canyon. Concrete pouring forms are seen around the dam wall in the center of the picture. Buildings, vehicles and roads are seen in the river...
60 Object thumbnail
Upper portal trashrack for diversion tunnel no. 1, on the Nevada side. Shows the concrete pouring forms for the upper portal trashrack for diversion tunnel no. 1 on the Nevada side.
61 Object thumbnail
Diversion tunnel no. 2, showing the pumpcrete line to the upstream plug Shows the concrete pipe line from the pumpcrete gun to the upstream plug in diversion tunnel no. 2. Some construction workers are visible.
62 Object thumbnail
View of no. 4 plug, Hoover Dam site 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.
63 Object thumbnail
Construction inside tunnel, Hoover Dam site Shows construction looking upstream in a tunnel at Hoover Dam. One of the pipe sections is in place. Scaffolding and other building materials are shown.
64 Object thumbnail
Interior of diversion tunnel showing pipe Shows the pipe inside a diversion tunnel at Hoover Dam during construction. Electric lights illluminate the scene. Building materials are visible.
65 Object thumbnail
Interior of tunnel during Hoover Dam construction View of downstream plug, from the Nevada plug adit. Note the forms for the first pour being built.
66 Object thumbnail
Interior of Hoover Dam diversion tunnel during construction Shows the interior of a diversion tunnel at Hoover Dam during its construction. A construction worker and equipment can be seen. Note the cleanup operations, getting ready for the carpenters.
67 Object thumbnail
Interior of diversion tunnel during Hoover Dam construction Shows the interior of a diversion tunnel during construction. Construction materials are visible.
68 Object thumbnail
Diversion tunnel no. 1 trashrack and counterweight assembly just prior to the diverting of the... Construction workers are seen climbing on the outside of the no. 1 trash rack at diversion tunnel no. 1. Other workers view the scene from a railroad trestle that runs over the diversion tunnel portal, and from the upper cofferdam...
69 Object thumbnail
Looking upstream toward no. 1 upstream plug, showing approximately 7,100 second feet of water being... View of water being discharged into the no. 1 diversion tunnel. A series of bundled pipes is visible on the right side of the tunnel wall.
70 Object thumbnail
Diversion tunnel under construction - Hoover Dam Exterior view of diversion tunnel at the Hoover Dam site during construction. Photo shows the Colorado River flowing through the tunnel and scaffolding around the partially constructed tunnel.
71 Object thumbnail
Hoover Dam -- downstream face Color transparency of the downstream face of Hoover Dam. This panoramic view shows the portals of the diversion tunnels, the power house, the walls of Black Canyon, and the Colorado River.
72 Object thumbnail
View of Hoover Dam from downstream on the Colorado River View of Hoover Dam from downstream on the Colorado River. The Nevada power house is vivisble on the left, and water is being discharged from the outlet works of the Arizona valve house on the right. The diversion tunnel portals...
73 Object thumbnail
View of Hoover Dam from downstream on the Colorado River View of Hoover Dam from downstream on the Colorado River. The Nevada and central power houses are seen at the base of the dam face. Water is discharged from the outlet works of the Arizona valve house on the right....
74 Object thumbnail
Hoover Dam from the downstream side View of face of dam showing water coming out of the outlet works on the Arizona side. A bridge, a cableway above the dam, the mouths of several diversion tunnels, the Nevada power house, and construction equipment are visible. The...
75 Object thumbnail
Hoover Dam from downstream side Shows the face of the dam with water streaming from the outlet works on both sides. Also shows the central power house, the mouth of a diversion tunnel on the Nevada side, and Fortification Hill in the background.
76 Object thumbnail
Aerial view of Hoover Dam Aerial view of Hoover Dam showing water spewing from the outlet works in the valve houses on both sides of the dam. The reservoir (Lake Mead) is beginning to fill above the dam. The Arizona and the central power houses...
77 Object thumbnail
Outlet works -- Hoover Dam Close-up view of the outlet works spewing water at the dam. Appears to have been taken at dusk. The entrances to two of the diversion tunnels are visible.
78 Object thumbnail
Aerial view of Hoover Dam Aerial view of Hoover Dam and the surrounding area. The outlet works are open, spewing water. The portals to three of the diversion tunnels are visible. The tops of the intake towers, the central power house, and...
79 Object thumbnail
Aerial view of Hoover Dam Aerial view of Hoover Dam and the surrounding area. Part of the Colorado River, Lake Mead, and Fortification Hill are visible. The outlet works are open, spewing water. Several of the portals of the diversion tunnels can...
80 Object thumbnail
Construction of Hoover Dam View of Hoover Dam under construction. A portal to a diversion tunnel is visible at lower left. The power houses can be seen as well as several buildings in the lower right of the photo on the cofferdam.
81 Object thumbnail
Looking upstream at the upper end of no. 1 plug, showing forms for the intake... Rebar inside a diversion tunnel under construction. A blurry image of two construction workers is at the top of the picture.
82 Object thumbnail
Looking upstream into no. 1 plug, showing the placing of the high pressure valves and... Placing of the high pressure valves in one of the diversion tunnels. There are two construction workers in the picture, and the tunnel is illuminated with electric lights.
83 Object thumbnail
Hoover Dam Expansive view of Hoover Dam showing the power houses, the waters of the Colorado River below the power houses, two of the portals to the diversion tunnels, transmission towers on the cliffs above, and a cable across the top...
84 Object thumbnail
Dowstream face -- Hoover Dam Photo taken from quite a distance down Black Canyon, showing the downstream face of the dam, the power houses, the Colorado River, and one of the portals of the diversion tunnels.
85 Object thumbnail
Hoover Dam and surrounding area This is a re-touched photo of Hoover Dam and the surrounding area. The Colorado River can be seen below the power houses. The intake towers are visible behind the downstream face. The reservoir (Lake Mead) can be...
86 Object thumbnail
Construction -- Hoover Dam View of the construction of Hoover Dam showing the upstream face, the power houses, and some of the portals to the diversion tunnels. Part of the Colorado River is visible.
87 Object thumbnail
Hoover Dam construction View from a distance of Hoover Dam and the canyon. The upstream face, the power houses, and one of the portals to the diversion tunnels can be seen. There are buildings on the cofferdam and part of the...
88 Object thumbnail
Blasting at Hoover Dam site View of construction in Black Canyon at the Hoover Dam site. Construction workers are standing by the railroad tracks looking at a dynamite blast that is taking place in the distance. The Colorado River is visible as...
89 Object thumbnail
Inside a diversion tunnel -- Hoover Dam construction Shows a construction worker and power shovel inside a diversion tunnel at the Hoover Dam construction site.
90 Object thumbnail
Construction in diversion tunnel -- Hoover Dam View of the drilling jumbo working in one of the diversion tunnels during the construction of Hoover Dam.
91 Object thumbnail
Construction of diversion tunnel at Hoover Dam Shows a drilling jumbo and other construction vehicles inside a diversion tunnel during the construction of Hoover Dam.
92 Object thumbnail
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.
93 Object thumbnail
Diversion tunnel under construction at Hoover Dam site View of the interior of one of the diversion tunnels during construction at Hoover Dam. Electric lights illuminate the scene.
94 Object thumbnail
Construction of Hoover Dam diversion tunnel 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 at bottom...
95 Object thumbnail
Construction -- Hoover Dam -- Diversion tunnel Shows the construction of one of the diversion tunnels at Hoover Dam.
96 Object thumbnail
Construction of Hoover Dam diversion tunnel Shows a dump truck and construction workers framed at the mouth of a diversion tunnel during the construction of Hoover Dam.
97 Object thumbnail
Construction of Hoover Dam diversion tunnel and portal "View of upper portals tunnel #1. showing R.R. trestle and gate works." (inscription on back of photo) Concrete pouring forms are visible in the diversion tunnel.
98 Object thumbnail
Construction of Hoover Dam Shows a truck and wood forms inside a diversion tunnel during the construction of Hoover Dam.
99 Object thumbnail
Construction workers inside Hoover Dam diversion tunnel Shows a power shovel dumping concrete into a dump truck inside a diversion tunnel during the construction of Hoover Dam. Construction workers are visible at work.
100 Object thumbnail
Portals, Hoover Dam construction "Shows men placing dynamite to flood entrance blocks away from #3 and #4 Arizona side."(inscription on back of photo) The portals to the diversion tunnels are visible. The Colorado River is shown below the portals and buildings and trucks...
 

Subscribe to this Search