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251 - 275 of 431 Items << < 6 7 8 9 10 11 12 13 14 15 > >>
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Upstream face of the dam, looking westerly, with reservoir water surface at elevation 1139.05. The trashrack structures in the right foreground will prevent debris from entering the penstocks leading to the right powerhouse.
1914-02-05
2024-05-16 |
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Standard rain gauge and thermometer instruments in weather station located near concrete testing laboratory.
1905-04-19
2024-05-16 |
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Forty-eight inch conveyor belt transporting finished aggregate from screening and washing plant to mixer stockpiles - capacity 1250 tons per hour.
1935-09-15
2024-05-16 |
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Built here on the delta of Fiddle Creek is the model town of Coulee Dam, WA. or "Engineer's Town" and "Government Camp" as it was sometimes called. Its 134 dwellings are neatly patterned in a novel arrangement on an unusual site, nestling beneath...
2024-05-16
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This mimic board in the main control room shows the interconnections of generators, transformers, power circuits, associated switch yard equipment, and the outgoing transmission lines, as arranged on December 14, 1942, except that Spokane lines...
1942-12-14
2024-05-16 |
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Spectacular waterfall at Coulee Dam surpasses Niagara in height. During the 1940 flood stage, the Columbia River was diverted through the outlet works and over a portion of the unfinished spillway section.
1940-06-07
2024-05-16 |
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Department of the Interior: Bureau of Reclamation; Columbia Basin Project-Washington Grand Coulee Dam - Organization Chart May 1934
1934-05-01
2024-05-16 |
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This plastic model of the caisson barge was the experimental forerunner of the full-working model. From its study and experiments come not only the information for design data, but knowledge of its behavior in the bucket and plans for operations...
2024-05-16
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Knowledge of the action and behavior of water flow over dams can be gained only by the careful study of accurately scaled models such as this. They reveal not only information concerning their prototypes, but furnish data for the design of even...
2024-05-16
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From the study of this 1-60 working model of the dam, and a scaled section of the river channel, came much valuable information regarding the action of the water in the spillway bucket, and the washing of material in the river bed directly...
2024-05-16
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Future site of the Grand Coulee Dam - looking upstream. Excavation Contractor Ryan's camp in the foreground.
1934-01-04
2024-05-16 |
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This is a full-operating model of the floating caisson barge used to repair the spillway bucket. The walls of the work chamber are shaped to fit the contour of the bucket, and are equipped with wide rubber seals. After being floated into...
2024-05-16
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Conjunction of the pumping plant foundation and the left abutment section of the dam.
1940-01-02
2024-05-16 |
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The finished outlet portal of one of the 12 pumping plant discharge tunnels.
1939-02-08
2024-05-16 |
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Contractor's employees receiving their "brass" in going on shift at west guard office.
1936-07-17
2024-05-16 |
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The Columbia River at flood stage flows over 16 low blocks in the spillway section of the dam. The outlet conduits at elevation 934 were also used for river diversion and at this date 18 of the 20 conduits were open.
1939-06-01
2024-05-16 |
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The Columbia River at flood stage is diverted over spillway blocks at elevation 995. the conduit liners are in place for the outlet works at elevation 1036.
1939-06-01
2024-05-16 |
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An interior view of one of the 12 pumping plant discharge tunnels. At this section, the tunnel is 17 feet in diameter and with the exception of final trim and cleanup, all work has been completed.
1939-03-24
2024-05-16 |
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At the close of 1939, Consolidated Builders had completed 68.5% of the contract work for Grand Coulee Dam. With more than 9,000,000 cu. Yds. Of concrete in the structure, the right and left abutment sections were within 100 feet of the top and...
1939-12-01
2024-05-16 |
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Exhaust blowers were used to ventilate the pumping plant discharge tunnels while excavation was in progress.
1939-01-09
2024-05-16 |
