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1151 - 1175 of 2123 Items << < 42 43 44 45 46 47 48 49 50 51 > >>
1151 - 1175 of 2123 Items << < 42 43 44 45 46 47 48 49 50 51 > >>
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One of the control switchboards in aggregate processing plant.
1936-09-01
2024-11-23 |
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Disconnecting switches in the 115,000-volt circuit between the L-1, three-winding transformers and the switch yard.
1942-10-21
2024-11-23 |
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6900-volt switchgear XLS panels in the station service bay of the left powerhouse.
1941-01-22
2024-11-23 |
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The transformer deck (at left) for the right powerhouse, under construction.
1941-12-29
2024-11-23 |
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Earth movements in the right tailrace slide area undermine the contractor's shop building.
1940-02-01
2024-11-23 |
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Western Pipe & Steel Company's fabrication plant at Electric City. Completed penstock sections have been rolled out into the storage yard.
1939-03-09
2024-11-23 |
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The 1938 high water of the Columbia River tops the upstream spillway blocks and floods the blockouts left for the outlet works gate installations at el. 934. The maximum flow for 1938 was 361,680 second feet.
1938-05-28
2024-11-23 |
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Pulling steel piling in the removal of the cross river cofferdams. The greater part of the steel piling was removed when the cofferdam earthwork was above the water surface.
1938-01-05
2024-11-23 |
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Looking south (upstream) after flooding west end of dam foundation - showing the four main diversion slots, the timber plug between blocks 49 and 50 to cells in section "G" of west cofferdam and to the right the east end of west powerhouse. Center...
1936-11-20
2024-11-23 |
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Three such draft tube outlet portals as seen here permit the spent water to pass from each turbine in the powerhouse into the tailrace. The floor upon which the workman is standing is at elevation 896. To permit dewatering of the turbine pits...
2024-11-23
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Here steelworkers are closing the MWAK high trestle above one of the deep crevasses in the east side bedrock. The zig-zag trough system, with the long rubber and canvas tube or "elephant trunk" on the end, seen inside the left tower prevents the...
1937-04-01
2024-11-23 |
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Barge crane handling a temporary steel gate for an 8 1/2 foot outlet tube.
1942-10-01
2024-11-23 |
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Visitors waiting to enter the left powerhouse, after the radio broadcast ceremonies celebrating the placing in operation of the station-service generators on March 22, 1941.
1941-03-22
2024-11-23 |
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Erection in progress on the structural steel take-off tower atop the left powerhouse roof.
1940-11-28
2024-11-23 |
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General view of the left powerhouse at the start of the 1940 construction program. The control bay has not been built above the el. 1012 level and construction is still in progress on the service bay.
1940-02-29
2024-11-23 |
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Equipment at work on removal of the old cofferdam island downstream from the spillway section of the dam. This job involved the pulling of steel piling, removal of timber cribs, drilling and blasting of concrete, and excavation of earth and rock...
1939-02-06
2024-11-23 |
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Completed blockouts for the el. 934 outlet works conduit gates. Due to the fact that the ring follower and paradox conduit gates could not be delivered until late in 1937, the blockouts were provided for their future installation. Consolidated...
2024-11-23
2024-11-23 |
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Department of the Interior. Bureau of Reclamation. Columbia Basin Project--Washington. Columbia River Dam Calyx Drill Holes Location up to 1938
1939-01-24
2024-11-23 |
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This is the east powerhouse and cofferdam area as it appeared in November of 1937. The Training wall at the end of the powerhouse is approximately 85 feet high; as tall as a six story building.
1937-11-01
2024-11-23 |
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The core of a special 36,000-kv.-a. transformer, just unloaded from a gastight car in which it was delivered from the General Electric factory. The transformer is provided with full-capacity secondary windings for both 115,000 and 230,000 volts.
1942-01-15
2024-11-23 |
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The 24-foot intermediate section of the shaft of unit L-1 being lowered into position for coupling with the turbine shaft. Bill Miller, master mechanic, inspects the surface of the shaft flange; Don Reeder, machinist foreman, at the right;"Doc"...
1942-01-29
2024-11-23 |
