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776 - 800 of 2123 Items << < 27 28 29 30 31 32 33 34 35 36 > >>
776 - 800 of 2123 Items << < 27 28 29 30 31 32 33 34 35 36 > >>
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Scroll case for main unit L-1, with erection completed and ready for water pressure test.
1941-09-11
2024-11-23 |
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West highway retaining wall and highway, looking southeast. Traffic will be detoured over the backfilled area adjacent to the wall while the temporary bridge, under the planked section of the road, is removed.
1941-10-29
2024-11-23 |
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Concrete placing is resumed at Coulee Dam following the winter shutdown.
1940-02-29
2024-11-23 |
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A 200,000-volt X-ray machine photographing the circumferential welded seams of a main unit penstock section. One picture covers 16 inches of the seam; the penstock liner is rotated so that successive 16-inch sections of the seam are X-rayed. The...
1939-08-10
2024-11-23 |
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Center tower of suspension bridge carrying 36-inch conveyor for transportation of aggregate across to Westmix. Tower foundation is in a cell of section "G" in west cofferdam.
2024-11-23
2024-11-23 |
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Drilling on high points of granite in foundation bedrock on east end of tailbay.
1937-06-04
2024-11-23 |
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Filling and discharge ends of the four concrete mixers in Eastmix.
1936-06-01
2024-11-23 |
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One of the two 20-inch gyratory crushers in trommel screen house at aggregate pit.
1936-09-01
2024-11-23 |
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Dragline working on wall of aggregate in Brett pit for shovels operating on floor at elevation 1840.
1936-09-11
2024-11-23 |
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Workmen fitting the lower skin plates in position with pins, previous to bolting and finally riveting. In all the thousands of holes in the various parts of all these gates, less than a dozen holes required reaming in the field or on the job in...
2024-11-23
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A view of the Brett Gravel Pit in September of 1936 showing the operation of the extensible lateral conveyor belt feeders. The main conveyor belt dumped the material into the raw aggregate stock pile from where another belt carried it into the...
1936-09-01
2024-11-23 |
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Construction view of assembly building site.
1942-07-10
2024-11-23 |
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For the purpose of improving the operation of turbine L-1, the trailing edges of the runner blades were reduced in thickness by chipping and grinding.
1942-12-02
2024-11-23 |
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A six-foot Niles radial drill press, in the machine shop of the left powerhouse, was used to bore a re-babbited wear-ring in the stuffing-box of turbine L-3.
1942-11-25
2024-11-23 |
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View down the concrete transfer skipway toward the east powerhouse area.
1942-04-20
2024-11-23 |
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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
2024-11-23 |
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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
2024-11-23 |
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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
2024-11-23 |
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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
2024-11-23 |
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Mats of reinforcing steel for a spillway drum gate installation.
1940-07-13
2024-11-23 |
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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
2024-11-23 |
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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
2024-11-23 |
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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 |
