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1126 - 1150 of 2123 Items << < 41 42 43 44 45 46 47 48 49 50 > >>
1126 - 1150 of 2123 Items << < 41 42 43 44 45 46 47 48 49 50 > >>
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Sledges were used to tighten the thousands of alloy steel bolts that hold together the many sections of the turbine scroll cases, and resist the tremendous water pressure tending to separate them.
1943-05-26
2024-11-23 |
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Diamond drilling holes in the elevation 900 transverse gallery, block 12, for uplift pressure tests.
1941-12-18
2024-11-23 |
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The 1650-foot spillway section of Coulee Dam. Practically all of the concrete work for the spillway crest is completed and construction of the piers are in progress.
1940-10-23
2024-11-23 |
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At one of the three fish traps at Rock Island Dam, a load of salmon is dumped into the tank compartment of a fish hauling truck. The fish will be hauled to one of the tributaries of the Columbia River below Coulee Dam and there released.
1939-04-28
2024-11-23 |
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A five-yard shovel dumping in hopper on end of "pendulum boom" conveyor in Brett pit.
1936-05-01
2024-11-23 |
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All loose material was removed, and this heavy concrete retaining wall poured from bedrock up to road level, thus preventing any further difficulty with this section of the roadway.
2024-11-23
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Generator L-3 in operation and L-2 nearing completion in the west powerhouse. The base for generator L-1 is shown.
1942-01-02
2024-11-23 |
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Thirty-one foot rotor shaft is set in position on the special assembly platform constructed in the L-9 turbine pit of the left powerhouse. A crew of men from the Westinghouse Electric & Manufacturing Company factory will assemble the rotor on this...
1941-02-11
2024-11-23 |
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The 40-ton rotor of a 12,500 kv-a. station service generator is carefully lowered into position inside the stator. The huge generator part fits so closely that only thin slats may be used to prevent lateral motion while being lowered by the crane.
1940-08-29
2024-11-23 |
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"Side-hill" gantry crane. The upper runway rail is 36 feet above the trestle deck and is set into the sloping face of the dam. This crane and a similar one on the other end of the dam were used to complete concrete placing in the abutment sections.
1940-05-03
2024-11-23 |
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Ironworkers tightening bolts of the outlet conduit liners which are installed upstream of the 102-inch ring seal gates at elevation 1036.
1939-06-01
2024-11-23 |
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Types of diamond drill bits used for drilling grout holes. From left to right: 1-7/8" core bit, 1-7/8" concave solid bit, and 1-3/8" concave solid bit. Black diamonds, the cutting agent, are partially visible in the metal of the bits.
2024-11-23
2024-11-23 |
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Workman operating a chipping hammer. Defective concrete areas on the downstream face of the dam and elsewhere are chipped out, and the void filled with new concrete.
1938-08-25
2024-11-23 |
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Consolidated Builders' main water supply pumping station.
1938-09-16
2024-11-23 |
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Looking down on distributing manifold in cooling shaft in block 22
1936-12-01
2024-11-23 |
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View looking west in the 230-kv. switchyard. General Electric 8-cycle, 230-kv., 2 1/2 million kv.-a. pneumatically operated oil circuit breakers are shown.
1942-09-16
2024-11-23 |
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A slide of unstable material above the pumping plant threatened to take out the roadway all the way back to the cliff. In 1945-46 the Bureau took a large cut off the cliffs seen in the background, widening the highway and lowering the railroad grade.
2024-11-23
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On Jan. 14, 1935 David H. Ryan began work on removing the slide material, and moving the highway and railroad grade some 85 feet westward. He received $86,504.45 for his work on this slide removal. By April 25, 1935 most of the slide material had...
1935-04-25
2024-11-23 |
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Officers and delegates of the Washington State Convention of the National Federation of Federal Employees, held at Coulee Dam.
1941-04-19
2024-11-23 |
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The stator of a 12,500 kv-a. station service generator is carefully gone over with a vacuum cleaner. Inside this cavity will be installed a 40-ton rotor which will be whirled at 400 r.p.m. by the turbine embedded in the concrete below.
1940-08-29
2024-11-23 |
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To continue construction of the right abutment section of the dam above the trestle level, the contractor erected a side hill bracket gantry crane which traveled on the upstream rail of the trestle deck and on a rail 36 feet higher, in a recess...
1940-02-01
2024-11-23 |
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Concrete placing in progress at the left power house. From the elevation 1180 construction trestle, the concrete is lowered down the inclined skipway to the power house construction deck at elevation 1012, where the gantry crane picks up the...
1939-05-29
2024-11-23 |
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Placing concrete under elevation 1024 trestle inside supporting tower.
2024-11-23
2024-11-23 |
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Excavation equipment removing overburden in center or riverbed section. East end of low trestle shown under Eastmix in upper right corner. Athey and Woolridge buggies below.
1937-03-16
2024-11-23 |
