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826 - 850 of 2123 Items << < 29 30 31 32 33 34 35 36 37 38 > >>
826 - 850 of 2123 Items << < 29 30 31 32 33 34 35 36 37 38 > >>
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Riggers attaching cables, preparatory to hoisting away one of the large, heavy I beams of the C.B.I. concrete-placing trestle.
1942-03-18
2024-11-26 |
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Mr. Frank J. Malarky, erecting engineer for the Newport News Shipbuilding and Drydock Company, inspecting completed installation in the L-3 turbine pit. Servo-motor appears in right background, with wicket gate shaft housings in left foreground.
1941-07-24
2024-11-26 |
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Fourteen heavy cast steel sections, supported on screw jacks on small concrete piers, are fitted together to make the scroll case of a 150,000-horsepower Francis-type turbine.
1941-01-07
2024-11-26 |
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West highway retaining wall across slide area south of the "Dragon's Tooth,; and extension southward to Ryan Dump. Concrete placing has been practically completed, and finishing and stripping operations are in progress.
1941-10-29
2024-11-26 |
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Mats of reinforcing steel for a spillway drum gate installation.
1940-07-13
2024-11-26 |
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An 18-foot diameter penstock liner, and load of reinforcement steel approaches the right power house by road along the river. A barge will carry one truck and the loaded trailer across the intervening water of the right tailrace. The rear truck...
1939-10-27
2024-11-26 |
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An upper bonnet casting is lowered into place during the installation of a 102-inch diameter ring seal gate at elevation 1036 in the spillway section of the dam.
1939-05-02
2024-11-26 |
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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
2024-11-26 |
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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.
2024-11-26
2024-11-26 |
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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
2024-11-26 |
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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
2024-11-26 |
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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
2024-11-26 |
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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...
2024-11-26
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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...
2024-11-26
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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
2024-11-26 |
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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
2024-11-26 |
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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
2024-11-26 |
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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
2024-11-26 |
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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
2024-11-26 |
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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
2024-11-26 |
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Engineers checking anchor hinge alignment for drug gate #11 (bay #1);
1941-02-12
2024-11-26 |
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Spinning a web of steel bars for the reinforcement of the drum gate chamber concrete.
1940-07-12
2024-11-26 |
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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
2024-11-26 |
