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Diamond drilling holes in the elevation 900 transverse gallery, block 12, for uplift pressure tests.
1941-12-18
2024-04-28 |
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150-ton "streamlined" crane, which will operate on the left abutment of dam roadway. This crane has been completed except for the installation of the permanent wiring, which is now in progress by government electricians. The crane is used in the...
1941-10-21
2024-04-28 |
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View of the upstream face of the dam, showing the drum gates in the spillway section.
1941-05-16
2024-04-28 |
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View looking westward. Spillway drum gate #1 (in bay #11) is in fully lowered position. The forebay water surface is at elevation 1254.9.
1941-11-26
2024-04-28 |
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Bolting and riveting in progress on drum gate #1 (bay #11)
1941-01-28
2024-04-28 |
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Engineers checking anchor hinge alignment for drug gate #11 (bay #1);
1941-02-12
2024-04-28 |
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Excavation activity at west tailrace slide area. The West Vista House formerly stood to the left, in front of the shaft cribbing which shows above the end of the dragline boom.
1941-04-18
2024-04-28 |
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A general view of the left tailrace area, where additional riprap is now being placed. Note the haul roads and the barge from which trucks dump loads of riprap rock into the water.
1941-02-12
2024-04-28 |
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Form for freight elevator tower, at block 31, being hoisted into position.
1941-06-30
2024-04-28 |
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Passenger elevator tower, at block 11. Concrete work has been completed on this tower, and glide rails for the car and counterweight have been installed.
1941-10-21
2024-04-28 |
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Footings for bents to support falsework for a concrete highway arch over a drum gate.
1941-06-19
2024-04-28 |
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Falsework and forms for the construction of the arch-type highway spans over the eleven drum gates in the 1650-foot spillway. The bridges will be comprised of 7400 cubic yards of heavily reinforced concrete. The elevation of the water in the...
1941-06-26
2024-04-28 |
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Spillway section of the Grand Coulee Dam, with the erection of falsework for the spillway bridge arch barrels in progress.
1941-07-15
2024-04-28 |
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Work in progress on the arch barrel for the spillway bridge in bay #11.
1941-07-15
2024-04-28 |
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Hydraulic jacks in position, preparatory to the lowering of a drum gate in the spillway section of the dam. The gates were assembled in their raised position.
1941-05-23
2024-04-28 |
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"Flame-cleaning" the exterior of a spillway drum gate, preparatory to the application of four coats of paint. Eighteen acres of metal surface stared welders in the face when they recently began cleaning the interiors and exteriors of the 11 giant...
1941-04-21
2024-04-28 |
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Station-service generators LS-1 and LS-2 in the left powerhouse.
1941-03-13
2024-04-28 |
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Partial view of station-service generator LS-1, at right, and control cubicle and governor cabinet at left.
1941-03-13
2024-04-28 |
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Governor Arthur B. Langlie, Supervising Engineer F.A. Banks, Construction Engineer, A.F. Darland, and Chief Jim James of the Nez Perce Indian Tribe during the ceremonies of March 22, 1941, when the station-service generators of the left powerhouse...
1941-03-22
2024-04-28 |
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Visitors waiting to enter the left powerhouse, after the radio broadcast ceremonies celebrating the placing in operation of the station-service generators on March 22, 1941.
1941-03-22
2024-04-28 |
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6900-volt switchgear XLS panels in the station service bay of the left powerhouse.
1941-01-22
2024-04-28 |
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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
2024-04-28 |
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Scroll case for main unit L-1, with erection completed and ready for water pressure test.
1941-09-11
2024-04-28 |
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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
2024-04-28 |
