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526 - 550 of 2123 Items << < 17 18 19 20 21 22 23 24 25 26 > >>
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The drum gate is hinged on castings anchored along the upstream side of a recess in the spillway crest. In the lowered or open position, the drum gate rests in the recess or chamber with its upper or upstream side forming the smooth curve of the...
2024-05-03 |
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A plate steel conduit liner, 102-inch inside diameter, is lowered to a block in the spillway section of the dam. Below are the partially installed castings for a ring seal gate installation at elevation 1136.
1939-12-01
2024-05-03 |
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High and low trestles, looking west. Reinforcing steel for east power house penstocks.
2024-05-03
2024-05-03 |
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Reinforcing around 24-foot hexagonal blockouts for 18-foot penstocks. Top of 1024 elevation trestle in distance.
1936-11-01
2024-05-03 |
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These are the pumping plant intake trashrack structures, as seen from the main dam which crosses to the left. The rising waters of the forebay are already a considerable depth in front of them." The wing dam is only 1/50 the size of the main...
2024-05-03
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Like many old construction landmarks, the CBI concrete mixing plant, often aptly referred to as "the house of magic" because of its almost-automatic operation, is disappearing from the project. It was erected early in 1938, to produce the...
1942-11-27
2024-05-03 |
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Steel from the CBI trestle ready for sandblasting on top of the dam. The plate girders were re-fabricated and used in the east powerhouse roof.
1942-08-04
2024-05-03 |
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Transformer tie-down portal frames and disconnecting switches on transformer deck of left powerhouse.
1941-08-06
2024-05-03 |
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The outlet works at elevation 1036 have been embedded in concrete, and formwork is in place for the gate gallery control chamber. The four vertical pipe headers on each side of the gate chamber forms are the air vent headers for the outlet gates--...
1939-09-21
2024-05-03 |
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"Ice Dam" and refrigerating plant, located upstream from block 66.
1937-11-01
2024-05-03 |
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Excavation of rock and common in river channel near downstream cross-river cofferdam. Draglines cleaning out crevice, and jackhammers drilling holes for blasting. Tripod for 36-inch Calyx hole to left of center in foreground. Conveyor in left center.
1937-04-02
2024-05-03 |
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Setting on the powerhouse floor at El. 991, between generators L-2 and L-3, steel plates on which to assemble the stator of Shasta generator.
1942-06-26
2024-05-03 |
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The right powerhouse nearing completion. The control bay remains to be added. Plyboard coverings have been placed over the 40' x 17' windows. The elevation of the river is 938.12, and the flow over the spillway, 41,000 c.f.s.
1942-11-05
2024-05-03 |
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Coaster-gate crane unloading plate girders from dismantled CBI trestle, on the ready way to the dam, for sandblasting and alteration. They were used in place of trusses in the East Powerhouse roof.
1942-07-17
2024-05-03 |
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Assembling transformer tie-down portal frames on the left transformer deck and lightning arresters on the face of the dam.
1941-06-25
2024-05-03 |
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Spillway roadway under construction, looking westward from block 64 elevator tower
1941-09-29
2024-05-03 |
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Turbine pits in east power house low trestle above. High trestle at extreme top.
1937-10-29
2024-05-03 |
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Erecting some of the steel reclaimed from the Marcus bridge in the assembly building along the railroad, near the cement silos.
1942-08-29
2024-05-03 |
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Workmen using a gin-pole to construct one of several towers which will carry a 230,000volt transmission line from the left powerhouse to the left switchyard.
1942-11-27
2024-05-03 |
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With five sections of the scroll case of a "Shasta" turbine in their final position, the three remaining sections, connected together, are moved into place by an overheard crane.
1942-07-11
2024-05-03 |
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West Powerhouse: Building the rotor for the Shasta, Unit B, generator. The magnetic circuit for the field poles is built up of thin steel plates, forming a cylinder around the spider and shaft.
1942-09-18
2024-05-03 |
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Various stages of roof-slab forming on the right powerhouse are shown in this view of the west bay in section R8, looking north.
1942-09-28
2024-05-03 |
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A 150-ton crane on the dam above the left powerhouse, used in assembling and installing coaster gates over the entrances to the penstocks.
1942-04-29
2024-05-03 |
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Giant transformer for main generating unit L-1 being moved into position on transformer deck at left powerhouse.
1941-11-26
2024-05-03 |
