Results
151 - 175 of 251 Items << < 2 3 4 5 6 7 8 9 10 11 > >>
151 - 175 of 251 Items << < 2 3 4 5 6 7 8 9 10 11 > >>
|
"3224 Boulder Dam, looking upstream from the lower portals road. The lower coffer¬dam excavation has nearly been completed. Power House structures and Arizona Valve House shown. April 25th, 1935.
3220 Looking downstream at Boulder Dam, from...
|
|
"2228 Looking upstream at the Nevada Spillway. June 2nd, 1933.
2227 Looking upstream at the Arizona Spillway. June 2nd, 1933.
2236 Dumping first grout into Block J-3, Hoover Dam. June 6th, 1933"
|
|
"2286 Hoover Dam July 26th, 1933.
2277 Looking upstream at the Arizona Spillway July 22nd, 1933.
2278 Looking upstream at the Nevada Spillway July 22nd, 1933."
|
|
"1816 - 1817 Panoramic view of the Upstream Cofferdam, taken looking downstream. December 20th, 1932.
1834 - 183 5 Panoramic picture, looking downstream, showing Upstream Cofferdam. December 20th, 1932."
|
|
"1500 Enlarged sections of the Diversion Tunnels, which are later filled with Concrete Plugs, are lined with concrete, and at the same time made to conform to an exact 50-foot circular section, by means of temporary wooden panel forms, which...
|
|
"1304 Cloudburst in the water-shed of Las Vegas Wash assumed such proportions as to wash out a section of the railroad fill. July 12th, 1932.
1306 Twelve hours later the stream-bed is perfectly dry, but the force of the flood is graphically...
|
|
"1349 The highway which will cross the dam, under construction. Lookout Point is shown in the center of the picture. Method of riprapping fill shown in foreground. July 18, 1932
1300 Looking downstream from Lookout Point at the highway under...
|
|
"1343 Caterpillar tractors with bull-dozer attachment building road near Lookout Point to site of cableway bench.
July 18th, 1932.
1344 Construction of the bench for traveling cableway tower necessitates the demolition of Lookout Point, the...
|
|
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.
|
|
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.
|
|
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 |
|
"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...
|
|
"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...
2024-05-05
|
|
"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...
2024-05-05
|
|
"# 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...
2024-05-05
|
|
"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,...
2024-05-05
|
|
"#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...
2024-05-05
|
|
"#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...
2024-05-05
|
|
"#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....
2024-05-05
|
|
"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...
|
|
"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...
|
|
"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...
|
|
"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...
|
|
"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...
|
|
"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."
|
