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376 - 400 of 2123 Items << < 11 12 13 14 15 16 17 18 19 20 > >>
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Lowering the 537-ton rotor of Westinghouse 108,000-kw. generator L-1 into place.
1942-02-02
2024-05-08 |
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Unit L-3 in the left powerhouse. The turbine scroll case has been embedded in concrete, and form work and concrete placing operations are now in progress for the generator foundation.
1941-03-24
2024-05-08 |
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A main unit penstock section about to be hoisted into a right power house turbine pit. A total of 126 sections was moved by this method into the right power house turbine pits without a single mishap.
1939-09-27
2024-05-08 |
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Unloading a four-yard concrete bucket in a standard five-foot pour. Vibrator on extreme left.
1936-05-01
2024-05-08 |
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Selected material from volume two of: "A History of the Columbia Basin Project: Volume II"
2024-05-08 |
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The last tree remaining on the Columbia River reservoir area, being felled by Mr. F.A. Banks, Supervising Engineer of the Bureau of Reclamation, and Mr. Carl W. Smith, State Administrator of the Work Projects Administration. The location is in the...
1941-07-19
2024-05-08 |
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A 527-ton rotor, for the first of the 108,000 kilowatt generating sets, being fitted inside the stator or stationary section of main unit L-3. Two 350-ton cranes, joined together by means of a 60-ton lifting beam consisting of two single-trees and...
1941-06-05
2024-05-08 |
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A slide upstream from the dam undermines a section of the U.S. Construction highway and carries away a portion of a rubble masonry retaining wall. A slide occurred in this same area earlier in the year. See CB 4498
1940-10-31
2024-05-08 |
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Building the foundations for the new mixing plant setup at el. 1180. The old MWAK Co. Eastmix plant at el. 1024 is on the right, and in the background the dismantling and removal of the el. 1024 construction trestle is in progress.
1938-05-26
2024-05-08 |
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Looking down diversion channel entrance where part of section "C" west coffer, has partly been removed. Building upstream cross-river coffer from east side to cluster "D"; Low east timber coffer and the two concrete placing trestles across the river.
1936-12-02
2024-05-08 |
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Berm of Gravel west of section "E" of west cofferdam transported by conveyor from east side pit and placed by 36-inch belt, material diverted at suspension bridge tower.
1936-03-31
2024-05-08 |
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Thirty-six inch Calyx Drill rig on west side.
1935-09-26
2024-05-08 |
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"Pass-through" guard checking station at the entrance to the west powerhouse.
1942-04-02
2024-05-08 |
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The "ice dam" showing the slide of February 28, 1937, on the east forebay slope. The rock outcrop against which the slide lodged is about 100 feet back of the frozen earth dam.
1937-03-02
2024-05-08 |
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Section "C" of west cofferdam cleared for river diversion. East end of cross-river cofferdam on the right, to the left of which is low Wakefield type east coffer. Suspension bridge for west mixer aggregate in the distance.
1936-09-26
2024-05-08 |
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Looking down along suspension bridge carrying 36-inch aggregate conveyor to west concrete mixing plant. Length of bridge, 3508 feet.
1936-04-27
2024-05-08 |
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Westmix and trestles at elevations 950 and 1024 ready to begin placing concrete. Government warehouse in upper left of picture.
1935-11-30
2024-05-08 |
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Two fixed pile hammer steel structures, each covering a cell in section "H" of west cofferdam
1935-03-13
2024-05-08 |
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All-steel closure gates in place at spillway diversion channels Nos. 34, 36, and 38. The gates were placed on the upstream side of the dam only; the bottoms of the diversion channels were above the tailwater elevations, consequently gates were not...
1938-10-13
2024-05-08 |
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Gravel Berm on west side of section "E" placed by temporary conveyor. Material diverted from bridge conveyor at center tower.
1936-04-30
2024-05-08 |
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A "U-shaped" stoplog crib in downstream coffer being placed. In foreground is section "H" of west cofferdam partly removed. Across the river is the 965 el. Wakefield coffer.
1936-11-19
2024-05-08 |
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Wooden steam hammer gantry and clyde wiley whirley driving piles in west cofferdam.
1935-03-08
2024-05-08 |
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Looking east along dam axis. Excavation conveyer in foreground (M.W.A.K. Contract); East abutment excavation across the river (Ryan Contract)
1934-11-01
2024-05-08 |
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East end of downstream cofferdam. Section of aggregate conveyor at top.
1936-11-01
2024-05-08 |
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East end of upstream cross-river cofferdam - one arch of steel piling in place. Across river is main sections of west cofferdam.
1936-08-01
2024-05-08 |
