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951 - 975 of 1090 Items << < 34 35 36 37 38 39 40 41 42 43 > >>
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"2993 Form work on the Nevada Valve House bench. January 2nd, 1935.
2971 Telephoto view of Nevada Powerhouse units. December 19th, 1934.
2995 Arizona Valve House from the center of the low catwalk. January 2nd, 1935
2973 Telephoto view...
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"3512 Looking upstream in the Arizona Valve House. Note three gates and needle valves have been installed. October 29th, 1935.
3497 View from the top of Boulder Dam, looking toward the Power House, Valve Houses and lower portals of the...
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"2713. Boulder Dam, looking upstream from the Nevada side. May 31st, 1934.
2698. Looking upstream toward the upper plug and raise, in Diversion Tunnel No. 3. May 25th, 1934.
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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...
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"1782 Head Towers for Cableways Nos. 5, 6, 7 and 8, taken from the Arizona side, and showing steel trestle.
November 29th, 1932.
1768 View showing Head Tower for No. 8 Cableway. November 29th, 1932.
1780 Tail Towers for Nos. 7 and 8...
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"1853 Close-up view, showing excavation operations on the Nevada abutment of Hoover Dam. January 14th, 1933.
1901 High scaling activities, in connection with the excavation on the Nevada abutment to Hoover Dam. January 27th, 1933.
1861...
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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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"1647 Nevada Inclined Spillway Tunnel leading down into Diversion Tunnel No. 1. September 28th, 1932.
1515 Building fill, Arizona side, on which Tail Towers of Cableway No. 5 and No. 6 will run. August 29th, 1932.
1623 Arizona side of...
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"1411-1412 These pictures together with the two on the opposite page, form a panorama of operations being carried on at the canyon rim, on the Nevada side. Photograph was taken from the Arizona spillway site. To the left is shown the Black...
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"1588 View of Upper Portals of Diversion Tunnels No. 1 and No. 2 from Arizona side. September 9th, 1932.
1610 Upper Portals, showing temporary Trestle and Dyke in upper Cofferdam area. September 17th, 1932.
1662 Upstream Cofferdam progress....
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"1495 Interior of one of the diversion tunnels, showing panel of concrete lining being poured in the invert section of the tunnel. Side wall tunnel form is shown in the background. August 24th, 1932.
1479 Section of finished diversion...
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The 1963-64 Lake Mead survey was run to compute the reservoir capacity. Results of the geodetic and hydrographic surveys and sediment sampling equipment are described. The geodetic survey showed Hoover Dam subsided an average of 118 mm since 1935....
1970-08-01
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There are several planned alternatives for increasing the generation capacity of Hoover Dam to help meet peak power demands. These alternatives include: (a) uprating the existing generating units, (b) replacing or adding one or more generating...
1980-03-01
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The Hiram W. Johnson papers include materials from Johnson's time as a Senator from California that pertain to the Colorado River, Hoover dam, Colorado River Compact, and All-American Canal.
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The program for the Colorado River Aqueduct completion ceremonies. The program includes the cities included in the Metropolitan Water District of Southern California and the people involved in the aqueduct.
1960-04-25
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Lobbying brochure encouraging support of the Swing-Johnson congressional bill from taxpayers and citizens of the Imperial Valley. Provides information about proposed projects that would be financed through the bill such as the Boulder Dam (Hoover...
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View of the dam and intake towers. A road is visible leading across the top of the dam. Several automobiles are crossing from one side to the other. A spillway is in the lower left of the photograph. An unpaved road is in the lower portion of the...
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View from downstream on the Colorado River of Hoover Dam. Water is discharging from the outlet works of the Arizona valve house on the right. The Nevada valve house and power house are seen on the left.
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A construction worker is driving a caterpillar tractor in the rocks.
1932-03-28
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This photo is of a water clarifier tank at the gravel plant It is in the process of de-silting water which was pumped from the Colorado River two miles away.
1932-03-19
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Shows machine shop and warehouses, surrounded by material storage yards. There is also a train in the picture.
1932-03-11
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Letters and telegrams to Delph Carpenter from Colorado Attorney General Clarence L. Ireland, Imperial Irrigation District President Evan T. Hewes, and Secretary of the Interior Harold L. Ickes
2007-01-02 2007-01-02 |
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Speech about the future of water development in California
1973-11-28
2007-01-02 2007-01-02 |
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The western bank of the Colorado River, near the site of the proposed Topock Dam.
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"1378 Fabricated steel forms for placing the 3-foot thick lining in the side wall section of the diversion tunnels being erected outside the upper portal of Diversion Tunnel No. 1. July 23rd, 1932.
1381 Apparatus devised for drilling grout...
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