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

<< < 1 > >> | 49 objects

	Title	Description
1	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.
2	Construction near the upper portals of diversion tunnels no. 1 and no. 2	High scalers work on the cliff face above the unfinished portals of diversion tunnels no. 1 and no. 2. Construction equipment, trucks and workers are seen on the road in front of the tunnels. Rigging and ropes hang from...
3	Dump trucks on temporary dike in front of portals of diversion tunnels no. 3 and...	View of the temporary dike created to divert the Colorado River into the diversion tunnels. Dump trucks and construction workers are seen on the temporary pile bridge and the portals of diversion tunnels no. 3 and 4 are seen in...
4	Diversion tunnel at Hoover Dam	Looking into the interior of a partially constructed diversion tunnel. There appears to be some sort of scaffolding for construction workers to stand on and the tunnel is illuminated by electric lighting.
5	Looking up Hoover Dam during construction of the diversion tunnels	Looking upstream on the Colorado River flowing through Black Canyon at the Hoover Dam construction site. Bridges and catwalks are suspended over the river and the newly-dug mouths of the diversion tunnels are seen on both sides of the canyon....
6	Putting in the ceiling on the Nevada side of the no. 2 diversion tunnel	Interior view of construction on the Nevada side of the no. 2 diversion tunnel. Scaffolding rigged with electric lights is standing on the middle of the tunnel floor.
7	Sidewall concreting in diversion tunnel no. 4 showing workers	Construction inside diversion tunnel no. 4. Steel beams rigged with electric lights frame the tunnel walls and ceiling. A construction truck and workers are seen on the tunnel floor. Two workers are in the foreground.
8	Side-wall jumbo inside diversion tunnel	View of the interior of a diversion tunnel showing the side-wall jumbo used for placing of the concrete tunnel lining. The tunnel and jumbo are illuminated by electric lights. A construction worker stands in the foreground. A truck...
9	Detail of side-wall jumbo inside diversion tunnel	Detail of a side-wall jumbo used for pouring concrete lining inside a diversion tunnel. The side wings of the jumbo are jacked into place, and concrete is poured through ports by means of a traveling crane and 2 yd....
10	Closeup of Upper Portal of Diversion Tunnels No. 3 and 4, during preparations for blast.	A close-up of the portals to diversion tunnels no. 3 and 4 on the Colorado River. Construction workers prepare equipment for a blast. A truck loaded with lumber can be seen between the tunnels.
11	Hoover Dam construcion -- blasting	Shows the construction of Hoover Dam. One of the portals of the diversion tunnels is visible. Dynamite blasting is taking place in the canyon and trucks and various construction buildings are visible on the cofferdam. Also shows some...
12	Workers in diversion tunnels -- Hoover Dam site	Shows construction workers, truck, and power shovel inside a diversion tunnel at the Hoover Dam construction site. Electric lights illuminate the scene.
13	Close-up of trimming jumbo	Shows construction workers on the trimming jumbo which was used to scale the walls of the diversion tunnels and remove projecting rock. The tunnel is at the Hoover Dam construction site.
14	Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...	Construction workers are operating a power shovel, dumping dirt into a dump truck in a diversion tunnel at Hoover Dam. This is in the early phase of dam construction.
15	Crane transporting mixers in diversion tunnel at Hoover Dam site	Photo shows a crane transporting cement mixers pouring the concrete lining in a diversion tunnel for Hoover Dam. Workers and equipment are visible in the interior of the tunnel.
16	Gas-air shovel caught in the flooded Colorado River	A stranded gas-air shovel is seen standing in the flooding of the Colorado River riverbed during construction on Hoover Dam. The mouth of one of the diversion tunnels is seen in the canyon wall in the background. Other construction equipment...
17	Trash rack structure being installed in front of diversion tunnel no. 2	Close-up of construction workers installing the foundations of a trash rack in front of the portal of diversion tunnel no. 2. This is where the first pay concrete was poured.
18	Looking out of the interior of diversion tunnel no. 2, with gas-air shovel inside the...	View out of the upper portal of the unfinished diversion tunnel no. 2. A Bucyrus-Erie 43-B gas-aire shovel is seen near the mouth of the tunnel and reflected in a pool of water inside the tunnel. A man...
19	Workers and drilling jumbo inside diversion tunnel no. 4	Construction workers are seen working with a drilling jumbo inside diverson tunnel no. 4.
20	Close-up of workers using a drilling jumbo inside a diversion tunnel	Close-up of construction workers using a drilling jumbo to excavate the interior of one of the diversion tunnels. The tunnel is illuminated by floodlight.
21	Construction worker in bulldozer in front of diversion tunnel portal	A construction worker sits in a Caterpillar bulldozer in front of an unfinished diversion tunnel portal.
22	Construction workers using a drilling jumbo inside a diversion tunnel	Construction workers using a drilling jumbo to excavate one of the diversion tunnels.
23	Invert concrete pouring forms inside diversion tunnel	Interior of a diversion tunnel, showing invert concrete pouring forms. Some construction workers can be seen in the foreground. The tunnel is illuminated by electric lights.
24	Gantry crane inside diversion tunnel no. 3	A gantry crane is seen inside a diversion tunnel during construction of Hoover Dam. A flat bed truck is seen on the tunnel floor in the foreground and construction workers stand by. The tunnel is illuminated by electric...
25	Invert forms inside diversion tunnel no. 3	Interior of diversion tunnel no. 3, showing invert forms used for pouring concrete slabs. A trimming jumbo used for aligning the gauge of the tunnels is seen in the background. The tunnel is illuminated by electric lights.
26	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...
27	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.
28	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...
29	Interior of diversion tunnel during Hoover Dam construction	View of interior of diversion tunnel No. 3 during the construction of Hoover Dam.
30	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. ...
31	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.
32	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.
33	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.
34	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...
35	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.
36	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...
37	Inside a diversion tunnel -- Hoover Dam construction	Shows a construction worker and power shovel inside a diversion tunnel at the Hoover Dam construction site.
38	Construction in diversion tunnel -- Hoover Dam	View of the drilling jumbo working in one of the diversion tunnels during the construction of Hoover Dam.
39	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.
40	Construction -- Hoover Dam -- Diversion tunnel	Shows the construction of one of the diversion tunnels at Hoover Dam.
41	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.
42	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.
43	Hoover Dam construction -- various phases	This postcard shows the construction of Hoover Dam in four different stages. All views were taken from the same point looking upstream. The first image shows Black Canyon and the Colorado River at the very beginning of construction...
44	Hoover Dam construction	Panoramic view of the Hoover Dam construction site. One of the lower portals to a division tunnel can be seen. Buildings, trucks, and the cofferdam are also visible. A portion of the Colorado River is...
45	View showing method of finishing slabs in invert lining.	Construction workers are operating machinery to finish slabs in the invert lining of a diversion tunnel at the Hoover Dam site.
46	Trucks hauling concrete in the diversion tunnel	This photo shows trucks and equipment used for hauling and pouring concrete to form the invert lining in a diversion tunnel at Hoover Dam. Also shows some construction workers.
47	Construction on Hoover Dam and the power houses looking upstream from the lower portals road	View of the Hoover Dam construction site in Black Canyon, showing the nearly-completed dam face and construction on the power houses in the lower cofferdam. Concrete pouring forms are seen on the tops of the power houses. Temporary buildings...
48	Hoover Dam construction site, looking upstream from the lower portals road	View of the Hoover Dam construction site in Black Canyon, showing the nearly-completed dam face and construction on the power houses in the lower cofferdam. Concrete pouring forms are seen on the tops of the power houses. Temporary buildings,...
49	Construction on Hoover Dam and the power houses looking upstream from the lower portals road	View of the Hoover Dam construction site in Black Canyon, showing the nearly-completed dam face and construction on the power houses in the lower cofferdam. Concrete pouring forms are seen on the tops of the power houses. Temporary buildings, construction...