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851 - 875 of 2123 Items << < 30 31 32 33 34 35 36 37 38 39 > >>
851 - 875 of 2123 Items << < 30 31 32 33 34 35 36 37 38 39 > >>
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A main unit penstock inlet transition form is lowered to line and grade. This form will be embedded in concrete; it can be used only once, and after the concrete hardens, it will be completely dismantled.
1938-11-09
2024-11-23 |
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Deep crevice on east end - location of frozen arch dam was across spill of dark-colored flow near upper left corner.
2024-11-23
2024-11-23 |
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Looking east along axis of dam after flooding area. At the left edge is aggregate suspension-bridge conveyor to Westmix. In the center, three cells remain of section "D" in west steel cofferdam.
1937-12-21
2024-11-23 |
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Sixteen-inch grizzly dumping oversize rock at feeder hopper on swinging conveyor boom in Brett pit, later to be picked up by trucks for haul to crusher.
1936-09-01
2024-11-23 |
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East side of block 31, and 1024 and 950 elevation placing trestles."Smith Valley" gorge in foreground. Aggregate conveyor on bridge above.
1936-06-01
2024-11-23 |
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Here may be seen the girder framework of a drum gate in the extreme raised position during erection. Hinges of the gate may be seen at the left end of each horizontal girder. The chamber in which the structure will float, on water admitted from...
2024-11-23
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Outlet-gate service equipment used to place and remove overhead beams and hoist, for servicing outlet valves. Built by CBI, bought by Bureau.
1942-07-21
2024-11-23 |
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Riggers attaching a sling to a large section of concrete wall between pits 8 and 7, preparatory to removal. The opening was required for coupling the Shasta turbine in pit No. 7 to the penstock in pit No. 8.
1942-05-26
2024-11-23 |
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Installing coils and making connections at the junctions of the four sections of a Shasta stator, and testing the insulation of coils.
1942-08-21
2024-11-23 |
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View of left powerhouse from the elevation 1180 construction trestle, showing transformer deck, transformers, portal frames, and lightning arresters at left.
1941-06-30
2024-11-23 |
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Interior view of the left powerhouse, with the installation of the thrust bearing for the 108,000 kv.-a. generator in progress in bay L-3.
1941-07-05
2024-11-23 |
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Main unit L-3 turbine runner (water-wheel) suspended over turbine pit in left powerhouse, and about to be lowered into position.
1941-04-26
2024-11-23 |
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Engineers checking anchor hinge alignment for drug gate #11 (bay #1);
1941-02-12
2024-11-23 |
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Spinning a web of steel bars for the reinforcement of the drum gate chamber concrete.
1940-07-12
2024-11-23 |
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A main unit penstock inlet transition form is lowered into position upstream and adjoining the steel penstock inner section No. 1-2.
1938-11-09
2024-11-23 |
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Concrete finishing at bottom of "bucket" at toe of spillway - elevation 870, radius 50 feet. End of 950 elevation placing trestle at right.
2024-11-23 |
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Two conveyor laterals running to collecting belt at the 1840 level in Brett gravel pit."Pendulum" 200-foot arm in lower right.
1936-09-01
2024-11-23 |
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Here is shown the removal of the downstream section of the west cofferdam below the now-completed block 40. This will permit the river to flow thru the completed section of the dam off to the right, and enter its old channel to the left. The...
2024-11-23
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The station service transformer room of the left powerhouse. The transformers, each of 500 kv.-a. capacity, step down energy generated at 6900 volts to 460 volts, for operation of machinery in the power plant.
1942-01-10
2024-11-23 |
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Lowering the turbine runner for the L-7 Shasta turbine into place. The wheel is seen as it is entering the well at El. 979. The weight of the runner with its 38" shaft is about 85 tons.
1942-10-15
2024-11-23 |
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Concrete on its way to placement in the walls of the east powerhouse. The view shows the mixing plant; the skipway; and a crane lifting a concrete bucket to a railroad below, from which another crane will pick it up and place it.
1942-07-20
2024-11-23 |
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Work on the east powerhouse transformer deck, done by Consolidated Builders Inc. on an extra work order.
1942-01-14
2024-11-23 |
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A passenger leaving the 4,000-pound capacity elevator in the control bay of the west powerhouse. The machine can be operated either with or without an attendant, and travels about 180 feet. A 10,000-pound capacity freight elevator is in service in...
1942-09-22
2024-11-23 |
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Bolting and riveting in progress on drum gate #1 (bay #11)
1941-01-28
2024-11-23 |
