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801 - 825 of 1090 Items << < 28 29 30 31 32 33 34 35 36 37 > >>
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This shows a room filled with machinery. In the center of the room are three motors that appear to be bolted to the floor. On the right side of the photo there are large wheel turning valves. The left side of the photo shows a workbench pushed up...
2024-04-30
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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 the cliff face.
1932-03-07
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This picture shows blasting in Black Canyon to scale down the canyon walls so that the intake towers can be built for Hoover Dam. Part of the river is visible.
1932-03-28
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This is a view of the interior of a diversion tunnel when the first 40 foot concrete slab was poured to line the tunnel during construction of Hoover Dam. Lights illuminate the scene and a construction worker can be seen.
1932-03-18
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Speech highlighting the history of Lake Mead and the "recreation partnership" between the U.S. Bureau of Reclamation and National Park Service
1972-10-13
2007-01-02 2007-01-02 |
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Images of Hoover Dam (Boulder Canyon Dam) penstocks. First three images read, "R. E. Glover," and third image also reads, "Boulder unit A-8 After about 2 hr operation. Light ones and original red paint. Dark areas bare metal."
2007-01-02 2007-01-02 |
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Two reports entitled "Water Temperatures in Boulder Canyon Reservoir" by W. E. Green and "Examination of Current Studies of Structural Problems of Hoover Dam" by H. M. Westergaard
2007-01-02 2007-01-02 |
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"1285 Looking down from the cliffs, near the Arizona spillway, at the construction operations in and around the vicinity of the upper portals of the diversion tunnels on the Nevada side of the river. June 21st, 1932.
1284 Close-up view of...
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"1277 Steel forms for lining the arch sections of the diversion tunnels were erected on the muck-fill on the Nevada side of the river. June 18th, 1932.
1235 Section of the arch jumbo form being transported across the river by overhead...
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"A page of canyon views.
# 834 The low level concrete mixing plant nearing
completion. Silos for the storage of cement and bunkers for gravel storage which have been installed in the upper stories. January 28th, 1932.
# 826 The down-stream...
2024-04-30
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"#82 Lower Diversion Tunnel - Portal
No. 2, Nevada Side - Aug. 26, 1931.
#189 Hydraulic Workings just below Lower
Portal3 No. 1 and No. 2 - Sept. 9, 1931,
#201 ""Cherry Picker"" Tunnel No. 2 -Nevada Side - Sept. 10, 1931.
#227...
2024-04-30
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"#308 - View of site of gravel screening plant at Junction City in Hemenway Wash, on October 6, 1931.
#415 - Same as above, on October 27, 1931,
#321 - Flashlight of face of No. 4 Diversion Tunnel. Experimental jumbo for drill¬ing on...
2024-04-30
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"A page of views of Six Companies Inc. Recreation Hall in Boulder City. This building houses pool and billiard tables, soda fountain, lunch counter, barber shop, reading room and card tables, cigar and magazine counter, and is the social and...
2024-04-30
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"#35-269 First shot, Construction of Water Trail Canyon Road. May 2, 1931.
#36-236 First Portable Compressor at Railroad Tunnel No. 1. May 22, 1931.
#37-260 Bucyrus Shovel Working on Road
to Lower End of Tunnels #1 & #2, May 2, 1931....
2024-04-30
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"#76 - Masonry Retaining Wall for Highway Fill above Damsite. August 9, 1931
#77 - Location Lower Highway
Switch Back above Damsite August 9, 1931.
#78 - Dump Truck on Arizona Side and Approach Cut, Lower #1 & #2 Tunners, Nevada Side....
2024-04-30
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In 1931, Utah joined Six Companies Inc. to raise the surety required to bid for the Boulder (Hoover) Dam contract. One of the world’s largest dams, Hoover Dam was completed in 1936 at a cost of $49 million. These scrapbooks document through...
2024-04-30
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"2808 Nevada Powerhouse unit No. 8, from the Nevada retaining wall, showing turbine base and penstock tunnel.
August 21st, 1934
2809 Looking upstream through Nevada Powerhouse, showing reinforcing steel and forms. August 21st, 1934
2829...
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"3553 View from the crest of Boulder Dam, looking downstream toward the Power House and lower portals of the Diversion Tunnels. November 26th, 1935.
3527 Boulder Dam and Power House, looking upstream from the Nevada side. Note the reservoir...
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"3312 The Arizona Valve House, from the Nevada side. May 27th, 1935
3311 The Nevada Valve House, from the Arizona side. May 27th, 1935.
3277 Telephoto view, from the Arizona side, showing portion of the Nevada Powerhouse. May 27th,...
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"2799 Arizona Intake Towers, from the Nevada side. Nevada Intake Tower No. 5 in forground, with upstream face of Boulder Dam shown to right. August 17th, 1934.
2814 Nevada Intake Towers, from the Arizona side. Upstream face of Boulder...
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"2457 Two-hundred ton two-way trailer, for transporting sections of 30-ft. penstock pipe. December 15th, 1933
2481 Excavation for Downstream Plug, Diversion Tunnel No. 2, December 29th, 1933.
2460 View of 200-ton two-way trailer, with test...
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"3549 Looking south toward Boulder Dam Switchyard, showing the construction and excavation. November 26th, 1935.
3551 Looking upstream along the Nevada approach to Boulder Dam. Note the rubble wall being built and excavation for tower...
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"2826 Boulder Dam, looking upstream from Lookout Point. August 31st, 1934.
2831 Looking upstream into No. 1 Raise from the river side of the Nevada Spillway, showing form work at portal. August 31st, 1934
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"3136 Close-up of the Arizona Intake Towers-No. 6 on left, No. 3 on right. Note the forms for the dome of Intake Tower No. 6. March 4th, 1935.
3120 Looking downstream from the Arizona side, showing Boulder Dam, the Intake Towers and...
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"2260 Nevada Spillway, looking upstream. June 27th, 1933.
2242 Lower Portals of Diversion Tunnels, discharging 73,000 cubic feet per second flow into Colorado River.
June 16th, 1933.
2259 Arizona Spillway, looking upstream. June 27th,...
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