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551 - 575 of 2123 Items << < 18 19 20 21 22 23 24 25 26 27 > >>
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Excavation and removal of overburden in progress on the left tailrace slide area. Excavation has been completed down to the elevation at which the shovels are working.
1941-02-17
2024-05-17 |
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A ring seal gate casting is lowered into position during the installation of the 102-inch diameter outlet works at el. 1136 in the spillway section of the dam.
2024-05-17
2024-05-17 |
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The east or right end of the spillway section of the dam prior to installation of drum gates Nos. 1, 2, and 3.
1940-10-15
2024-05-17 |
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Looking east into the main unit generator room of the left power house during the course of construction. On the left is shown the type of scaffolding erected by the contractor to provide access to the wall pours. On the platform in the foreground...
1939-08-26
2024-05-17 |
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Closing east and west sections of high trestle, July 12, 1937.
1937-07-12
2024-05-17 |
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Athey 10-yard buggies dumping on grizzly over a feeder to 60-inch east side conveyor.
1936-08-28
2024-05-17 |
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This is a scene during night construction behind the cofferdam on the east side. Here it appeared to one as a huge stage setting from some Gargantuan drama, lighted by hundreds of gleaming globes, where a myriad of tiny objects moved from among...
2024-05-17
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In the background can be seen a concrete and timber bulkhead constructed across the upstream end of an east side crevice to prevent the material in the forebay from sliding into the pit. This device proved to be ineffectual in stopping the great...
2024-05-17
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Painters, refinishing drum gate No. 4 with aluminum paint.
1942-03-30
2024-05-17 |
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Shasta turbine scroll case L-7, from elevation 951, looking east. Water will be supplied from penstock L-8, through a reducing elbow extending through the pit wall.
1942-07-08
2024-05-17 |
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Attaching pole pieces and field coils to the rim of a Shasta generator rotor.
1942-09-17
2024-05-17 |
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Core and coils for General Electric three-winding, 36,000 kv.-a. transformer being lifted from special 16-wheel tank car, in left powerhouse. The car body is gastight, and was filled with nitrogen while in transit.
1941-11-17
2024-05-17 |
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East and west sections of elevation 1024 trestle about to be connected.
1937-07-12
2024-05-17 |
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Ice-dam gorge. Excavation down to elevation 761. Frozen dam to the left.
1936-12-03
2024-05-17 |
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Deep point in "Ice Dam" gorge in foreground - dam is between barge in pond and stairs leading down from ice plant. Across river is west cofferdam with the two ends partially removed.
1936-08-29
2024-05-17 |
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West wall of L-8 generator pit, through which workmen are cutting an opening for the penstock of a Shasta turbine. The wall was first drilled, then the center section will be blasted. Photo of workmen operating chippings guns.
1942-05-13
2024-05-17 |
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Here is shown the reinforcing of the spillway bridge piers between the drum gates. The temperature differential caused by heating of the pier plates for de-icing created a special problem in design of these structures, and also necessitated much...
2024-05-17
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Looking down on work in pit No. 8, from the top of the wall at El. 991, between pits 8 and 7. Reinforcing steel for the throat of the draft tube has been placed.
1942-06-26
2024-05-17 |
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Workmen tightening nuts on the thrust bearing runner of unit L-1. An insulator bushing of a General Electric 36,000-kv.-a. transformer at the left.
1942-02-11
2024-05-17 |
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The first roof girder being placed in the east powerhouse.
1942-08-15
2024-05-17 |
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Heavy reinforcing steel in place in the transformer deck and service bay of the east powerhouse.
1942-03-31
2024-05-17 |
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East end of west section of high trestle, June 3, 1937
1937-06-03
2024-05-17 |
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Looking downstream. River flowing through low gaps in concrete in dam foundation. Downriver is highway bridge leading to Mason City, above which is huge pile of surplus sand. Corner of Government town site (Coulee Dam) shown in center, left.
1937-12-22
2024-05-17 |
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Downstream section in west powerhouse showing reinforcing in base under draft tubes.
1936-04-30
2024-05-17 |
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Ice dam in deep gorge, upstream of east power house site blocks 67-69.
1936-12-03
2024-05-17 |
