Results
1001 - 1025 of 1090 Items << < 36 37 38 39 40 41 42 43 44 > >>
1001 - 1025 of 1090 Items << < 36 37 38 39 40 41 42 43 44 > >>
|
"1388 The period of danger from high water having passed, protecting arch coffer dams are blasted from the lower portals of the diversion tunnels, and muck fill is being removed. July 27th, 1932.
1418 Trucks with 4 cubic-yard concrete...
|
|
The response to periodic desiccation of periphyton communities developed in eddy environments or in areas exposed to variable, direct current was examined. Algal communities were incubated on clay tiles for between 2 and 12 weeks in the Colorado...
1984-12-01
|
|
The ever-increasing demand for energy in the southwest has led to a search for additional sources of power generation. Coal-fired powerplants currently provide most of the baseline energy in the southwest, but this must be supplemented with...
1980-01-01
|
Materials in this collection are from John L. Bacon and are related to his work on the Colorado River Commission, the Boulder dam (aka Hoover dam) project, water supply for California, division of Colorado River water within California, and...
|
|
A booklet printed July, 1925 for distributition by Boulder Dam Association to newspapers, civic and commercial organizations, a public officials throughout California, Arizona and Nevada. The booklet provides information on the Boulder Canyon Dam...
1925-07-01
|
|
This brochure outlines the plans for the Metropolitan Water District Aqueduct on the Colorado River. This project is associated with the Hoover Dam, occasionally referred to as the Boulder Canyon Dam or Boulder Canyon Project. The brochure...
1963-04-23
|
|
Report detailing possible routes for water to be diverted through the Imperial Canals for varying distances before entering plants that would lift water over the range.
|
|
Views of the site where Hoover Dam was constructed, and views of the city of Las Vegas just before the time period when the dam was constructed.
2024-04-23
|
|
The intake towers are in the middle of the photo. A portion of the Nevada spillway is visible in the foreground. A road on top of the dam is filled with automobiles crossing from one side to the other. In the background is the roadway leading...
|
|
A man crouches on the bank of the Colorado River on the downstream side of Hoover Dam watching water discharging from the outlet works of the Nevada valve house.
|
|
Color transparency showing panoramic view of Hoover Dam, the Colorado River, and Lake Mead. Fortification Hill is in the background.
|
|
A view of construction workers operating tractors as they construct a highway across the desert floor during the summer of 1931.
2024-04-23
|
|
The photograph is a close-up view of the sand classifier machinery in the gravel plant. Two employees are observing.
1932-03-19
|
|
View of a mixing plant with agitators mounted on White trucks. Looking upstream.
1932-03-08
|
|
Speech on future of water development, especially irrigation, in the U.S. West at the ASCE Watershed Management Symposium
1975-08-13
2007-01-02 2007-01-02 |
|
Images of Hoover Dam and surrounding area
2024-04-23
2007-01-03 2007-01-03 |
|
Two unidentified men in a small boat on the Colorado River, looking downstream toward the potential site for the Boulder Canyon Dam.
|
|
"1261 In pouring the portal structure for the upper portals of Diversion Tunnels Nos. 2 and 3, 4-cubic-yard Rex Moto Mixers were lifted from trucks and concrete poured directly in the forms. June 19th, 1932.
1266 View of the upper portal of...
|
|
"# 770 Nine ""covered wagons"", each having a capacity of forty-eight men, are used to transport the workmen from Boulder City to the canyon. These buses are canvas-covered, the side curtains of which can be raised during hot weather, January...
2024-04-23
|
|
"#177 Drilling Cape Horn for Canyon Railroad grade. Sept. 9, 1931.
#178 Drillers on Canyon Wall near Cape
Horn, for 720 Grade of Six Companies* railroad down Canyon. Sept. 9, 1931.
#97 Crowds seeking employment and their...
2024-04-23
|
|
"#190 Approach out to Lower End Tunnels No. 3 and No. 4, Arizona side -Sept. 1, 1931.
#203 Approach cut to Lower Portal
Ho. 4, Arizona side - Sept. 18, 1931.
#250 Colorado Hirer, High Water - at
Lower Portal Bo. 4 - Sept. 25,...
2024-04-23
|
|
"# 690 Pile and trestle bridge crossing the Colorado
River, approximately 11 miles above the damsite on the railroad, leading to the gravel pits on the Arizona side of the river. This bridge is 37 feet above the water-level shown in the...
2024-04-23
|
|
"#23 - Shovel Excavation of Blasted Rock Cut, Highway to Top of Dam June 2nd, 1931.
#25 - Bucyrus-Erie and #1 Marion
Electric Shovels Excavating on different levels at Lower Portals #1 & #2 Tunnels. July 6, 1931.
#26 - 43-B Bueyrus Erie...
2024-04-23
|
|
"#52 - Cat Walk & Plant at Nevada Adit. August 9, 1931.
#53 - Arizona Adit & Bunkers August 9, 1931.
#54 - Boat Landing: Incline Track Compressor Plant & shop Arizona Adit
August 9, 1931.
#55 - Compressor Plant, Arizona Adit August 9, 1931
"
2024-04-23
|
|
"#286 workers coming for lunch. Boulder City, Nevada. Sept. 27, 1931.
#285 Miners and workmen leaving
Boulder City for the Canyon -Sept. 27, 1951.
#209 Six Companies' Hospital under construction - Boulder City, Nevada - Sept....
2024-04-23
|
