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926 - 950 of 1090 Items << < 33 34 35 36 37 38 39 40 41 42 > >>
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View of water discharging from the Nevada and Arizona outlet works in the valve houses into the Colorado River downstream from Hoover Dam in Black Canyon. Diversion tunnel portals and a steel bridge are seen in the foreground. Two of the...
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View of Hoover Dam from downstream on the Colorado River. Water is being discharged from the outlet works of the Nevada valve house on the left. Part of the Nevada power house and the central power house are seen at the base of the dam face. The...
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A view of construction workers digging rocks and boulders on the side of Black (not Boulder) Canyon. The Colorado River is flowing through the bottom of the canyon.
2024-04-26
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A temporary cableway filled with construction workers is poised above the Colorado River in Black Canyon near Lookout Point. The Arizona spillway operations are shown in the background.
1932-04-01
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Two workers are monitoring the rake type sand classifier in the gravel plant. This machinery produced finished sand for storage and the stored gravel can be seen in the background.
1932-03-19
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Shows men working on heavy machines in a Six companies, Inc. machine shop.
1932-03-11
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Newsy letter about Arizona from attorney and fellow Colorado River Compact Commission representative W. S. Norviel to Delph Carpenter
2024-04-26
2007-01-02 2007-01-02 |
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Meeting minutes for a joint session of Colorado River Commissions from Colorado, New Mexico, Utah, and Wyoming, which took place in Denver, Colorado, December 3-5, 1929. The four states discussed how Upper Colorado River Basin states could prepare...
2024-04-26
2017-07-12 2017-07-12 |
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Reports and computations, including "Boulder Dam Board Meeting, April 12, 1930," "Report Upon Dissipation of Excess Heat from Hoover Dam," "Technical Memorandum No. 158 - Temperature Movements in Concrete and Other Materials with Special Reference...
2016-03-10 2016-03-10 |
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"1210 Looking upstream from a point near the presedimentation tank for the Boulder City water supply, during the recent high water, showing how the lower portals of the diversion tunnels have been protected with dikes of tunnel muck. May...
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"Page of views of Guest House and hone of Six Companies' Directors when visiting Boulder City. (January 7th, 1932.)
# 769 Exterior of rear of building, which occupies a commanding knoll, overlooking Boulder City and the mountains beyond.
# 762...
2024-04-26
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"A page of scenic views taken in the vicinity of Hoover Dam.
# 818 These pictures form a panorama from Observation 819 Point, overlooking Hemenway Wash and the reservoir which will be created when Hoover Dam is completed. The range of hills in...
2024-04-26
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"# 627 Six Companies Inc. employees aligning and oiling six miles of road down Hemenway Wash, toward the Upper Portals. November 19th, 1931.
# 628 Mixing the oil finish for the Hemenway Wash Road. November 19th, 1931.
# 579 Prior to the...
2024-04-26
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"A page of views of the low level concrete mixing plant and track hopper for gravel storage. The mixing plant is designed to accommodate six 4-cubic yard mixers, four of which are now being installed. When all six mixers are installed,...
2024-04-26
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"#181 Government Highway to top of Dam - Sept. 9, 1931.
#180 Government Highway to top of
Dam. Six Companies' Construction Road in background - Sept. 9, 1931.
#185 Setting Forms for Rook Wall - Upper
Loop - on Government...
2024-04-26
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"#48 - Six Companies' Railroad Grade
below Cape Horn. Aug. 9, 1931.
#49 - Upper Portal Six Companies' Railroad Tunnel #1. August 9, 1931.
#50 - Six Companies' Railroad Grade
above Railroad Tunnel #1, showing proposed location of...
2024-04-26
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"#60 - Boulder City, August 9, 1931.
#6l - Government Railroad & Government Highway in Hemenway Wash. August 9, 1931.
#62 - Government Highway, Boulder City to Damsite. August 7, 1931.
#63 - Government Highway, Boulder City to Damsite....
2024-04-26
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"2666 Looking upstream in Black Canyon, showing the downstream face of Boulder Dam. April 30th, 1934.
659 View showing installation of 100-ft. Drum Gates in the Arizona Spillway. April 28th, 1934.
2664 Looking upstream in No. 5 Penstock...
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"3238 Telephoto view of the Arizona Valve House. April 25th, 1935.
3237 Telephoto of the Nevada Valve House. Note
forms for the roof beams being built. April 25th, 1935.
3234 A telephoto view from the Nevada side, showing some of the...
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"2930 Nevada Intake Towers. View taken from the high catwalk. November 17th, 1934.
2949 Looking downstream into the Arizona Spillway, showing the bridge forms being placed. December 3rd, 1934.
2951 Looking upstream at the Arizona Spillway...
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"3007 Boulder Dam, looking downstream. View taken from the Arizona Canyon wall, showing Intake Towers and Himix in background. January 8th, 1935.
3010 Looking upstream into falsework under the Arizona Spillway Bridge, showing jacks in...
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"Aerial view, looking downstream from the Arizona side of Black Canyon. June 4th, 1935.
Aerial view, looking upstream toward Boulder Dam. June 4th, 1935
3321 Looking downstream from the Arizona side of Black Canyon, showing the reservoir level...
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"2895 Nevada Intake Towers, from the Arizona side. October 25th, 1934.
2901 Looking downstream, showing Spillways, Intake Towers and upstream face of Boulder Dam. October 25th, 1934."
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"2419 Boulder Dam. November 7th, 1933.
2428 Boulder Dam. (Note 10 ft. diameter Power House Gallery forms being installed.) November 22nd, 1933."
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"2638 Interior view of Power House block A-7, showing reinforcing steel and pipe layout. April 25th, 1934.
2660 Looking upstream in Black Canyon, showing general view of the Power House layout, taken from the Nevada
Valve House bench....
2024-04-26
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