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726 - 750 of 2123 Items << < 25 26 27 28 29 30 31 32 33 34 > >>
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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
2024-11-23 |
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The left abutment gantry crane siding recess was lined with concrete. The recess extending up the back wall is for a proposed control cable gallery extension which will be completed at some future date.
1939-11-30
2024-11-23 |
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Erected from the east and west shores, the elevation 1180 construction trestle is joined together over the spillway section of the dam. A total of 8,900 tons of structural steel was used in this trestle.
1938-09-10
2024-11-23 |
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Removing weathered and unsound surface rock in the bottom of the Columbia River channel.
2024-04-23
2024-11-23 |
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Rattlesnake Canyon, one mile from dam site - site for spoil pile of west excavation material.
1935-01-01
2024-11-23 |
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Third Volume, Fortieth issue, of the Mason-Walsh-Atkinson-Kier CO. builders of Coulee Dam Safety Newsletter. Created by the Safety Department and issued to the residents of Mason City and contract workers at Grand Coulee Dam.
2024-11-23
2024-11-23 |
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The construction trestle, with deck at el. 1180, approaches the spillway section of the dam. The Bethlehem Steel Co. under subcontract from Consolidated Builders, furnished the structural steel, and erected the trestle.
1938-08-02
2024-11-23 |
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Steel piling of cell cluster under part of which was leak in cofferdam, March 17, 1937.
1937-05-28
2024-11-23 |
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View to southwest from east side after completion of elevation 1024 trestle. Low trestle partially completed. East training wall and lip of spillway bucket in foreground.
1937-07-19
2024-11-23 |
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Carload of 4-yard concrete buckets on 950 elevation trestle.
1936-05-26
2024-11-23 |
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Eleven-inch pipe line transporting cement from storage silos to mixing plant - 7,000 feet long, using 100 lbs. air pressure.
1936-06-01
2024-11-23 |
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Shuttle conveyor for filling cells in west cofferdam.
1935-03-18
2024-11-23 |
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The Clyde D. Gessel papers (1939-2002) contain correspondence, reports, scrapbooks and maps. While the majority of the collection deals with his work as a member of the American Society of Civil Engineers (ASCE), there is a large portion that...
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Erection in progress on the el. 1180 construction trestle. The tugboat and barge in the foreground have just been brought from the downstream side of the dam through the diversion channel.
2024-08-23
2024-11-23 |
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Dismantling the central tower of the cross-river aggregate conveyor suspension bridge. The top section, controlled by cables, is being felled in one piece.
1938-03-29
2024-11-23 |
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Third Volume, Thirty Eighth issue, of the Mason-Walsh-Atkinson-Kier CO. builders of Coulee Dam Safety Newsletter. Created by the Safety Department and issued to the residents of Mason City and contract workers at Grand Coulee Dam.
2024-11-23
2024-11-23 |
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This is the generator control cubicle of the unit-control station for the No. 1, 75,000-kilowatt Shasta unit in pit L-7. It is situated in the governor gallery at elevation 951. The station will start the turbine, indicate the loads and...
1942-12-12
2024-11-23 |
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A monorail hoist and concrete transfer chute used for pouring concrete inside a supporting tower of the elevation 1180 construction trestle.
1938-11-21
2024-11-23 |
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Drill holes are blown out with compressed air, which accounts for the haze of dust surrounding these drillers.
1937-03-26
2024-11-23 |
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The 190-ton scroll case for 103,000 horsepower Allis-Chalmers hydro turbine unit being installed in the west powerhouse at Grand Coulee Dam. This unit consists of several radial and on straight section of welded plate steel riveted with double...
1942-07-11
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Representatives of various Northwest and Federal agencies meet at Grand Coulee Dam to confer on problems pertaining to the joint investigations of the Columbia Basin Irrigation project.
1940-06-10
2024-11-23 |
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Note on album leaf: The bucket. Downstream face of spillway with powerhouse foundation beyond.
PH Coll 239.40 |
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Cells completed after ten days' work on west cofferdam
1935-01-10
2024-11-23 |
