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876 - 900 of 1090 Items << < 31 32 33 34 35 36 37 38 39 40 > >>
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"1687 Rip-Rapped Fills on Black Canyon Highway. October 25th, 1932.
1717 Cutoff Trench at Upper Cofferdam, looking towards cliff from dike. October 31st, 1932.
1700 Operations on Arizona rim of Canyon, taken from Old Observation Point....
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"1524 Nevada Spillway, looking upstream. August 29th, 1932.
1525 Nevada Spillway, looking downstream. August 29th, 1932.
1527 Crew drilling in Nevada Inclined Spillway Tunnel, leading down into Diversion Tunnel No. 1. August 29th, 1932."
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Field sampling was carried out between 0830 and 1500 beginning at the confluence of Las Vegas Wash and the Inner Las Vegas Bay. Ten (10) locations were sampled, each in a similar manner. Locations of sampling stations are in line from the Wash-Bay...
1996-04-08
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A booklet regarding the Boulder Canyon Dam and the proposed benefits of the project. The dam would provide hydroelectric power, flood control, and water access for Southern California.
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A book about the history of the Colorado River as well as the future plans for the river such as the Boulder Canyon Dam and the Colorado River Aqueduct.
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Newspaper clipping that quotes the entire text of the Kettner Bill.
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'Prepared by the Automobile Club of Southern California.' 'burke' in lower right corner. '1352' in circle in lower left corner. Relief shown by hachures and spot heights. Shows mines, ranches, and springs.
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Photo shows the downstream face of Hoover Dam. The intake towers are visible as is one of the spillways. Transmission towers and the road leading to and across the dam is visible. There are cars on the road on the crest of the dam. The...
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View of Hoover Dam from downstream on the Colorado River. Water is being discharged from the Nevada and Arizona outlet works in the valve houses. The diversion tunnel portals and a steel bridge are seen in the foreground. Cables are suspended over...
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This shows a room filled with machinery. There is a huge motor attached to the floor and there are large wheel turning valves shown on the right side of the photograph. In the background, the rear of the room appears to have some type of electric...
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View of the Hoover Dam construction site, looking upstream on the Colorado River in Black Canyon. The partially finished dam face can be seen on the left, with concrete pouring forms and other construction equipment. Construction of the Arizona...
1934-02-20
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Construction workers using a drilling jumbo to excavate one of the diversion tunnels.
1932-03-08
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Construction workers are pouring concrete to line the diversion tunnels. Lights illuminate the project. Huge buckets hang from a crane.
1932-03-23
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Aerial view looking upstream of the Colorado River in Black Canyon during the early stages of dam construction. Foot-bridge and truck bridge are visible spanning the Colorado River. Some construction fcilities and equipment are seen on dirt roads...
1932-03-12
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Photo shows, left to right, Governor Balzar of Nevada; Carl Gray, president of the Union Pacific Railroad Co.; Ray Lyman Wilbur, Secretary of the Interior; Governor of Colorado [not named]; in front of crowd outdoors. Gray is handing Lyman the...
2024-04-25
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Correspondence between L. Ward Bannister and Delph Carpenter concerning disagreements over apportionment of the Colorado River and power generated by Hoover Dam, especially disagreements between Arizona and California
2007-01-02 2007-01-02 |
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Letter from Platt Rogers concerning negotions over the Colorado River and Hoover Dam, letter requesting Boulder Canyon Project information for a debate class from Thelma Ramhild and Delph Carpenter's reply, and letter from White House Secretary...
2007-01-02 2007-01-02 |
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"1364 The open cut excavation for the Arizona spillway. The top-heading for the spillway raise has been holed through and can be seen on the spillway face. July 20th, 1932.
1312 Electric shovels used for tunnel excavation are being used in...
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"A page of views showing the various types of trucks in use by Six Companies Inc. in hauling muck from the upper partalc of the d1 version tunnels.
# 494 An International truck with capacity of 7 cubic yards shown on the loft, with approved type...
2024-04-25
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"Looking out of the lower portal of Diversion Tunnel # 2. Note the size of the men in the entrance. January 25th, 1932.
#844 A flash
of the light photograph of the interior of one is workers ion tunnels. The drilling jumbo
12' top at...
2024-04-25
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"#89 Engineers, Surveying Canyon Walls,
directly over Upper Portals No. 1, and No. 2 - Aug. 24, 1931.
#224 Upper Portals No. 3 and No. 4,
Arizona Side. Cableway Anchorage
hole near top of wall. Sept. 28, 1931.
#225 Location of...
2024-04-25
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"#300-301 - Panoramic view with telephoto
lens of Boulder City from water tank hill on October 5, 1931.
#311 - Blasting down face of Cape Horn
to make way for construction rail¬way to damsite at elevation 720'. October 4, 1931.
#304 -...
2024-04-25
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"Work was being carried forward during November 1931 on both upper and lower faces of all Diversion Tunnels except Diversion Tunnel § 1, the inside tunnel on the Nevada side. Both upper and lower portals of this tunnel were started during...
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"#262 Homes for the employees of Six Companies, at Boulder City, Nev. - Sept. 25, 1931. #85 Boulder City, nevada- Aug. 27, 1931. # 264 Boulder City- Government houses in foreground; others Six Companies' Sept. 27, 1931. # 265 Boulder City,...
2024-04-25
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