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Lake back of Grand Coulee Dam, with "Yacht Club" landing and government dock in central foreground. The 230-kilovolt left switchyards appear in the background on the hillside.
1941-11-22
2020-10-28
Knowledge of the action and behavior of water flow over dams can be gained only by the careful study of accurately scaled models such as this. They reveal not only information concerning their prototypes, but furnish data for the design of even...
2020-10-28
Third Volume, Thirtieth issue, of the Mason-Walsh-Atkinson-Kier CO. builders of Coulee Dam Safety Newsletter. Created by the Safety Department and issued to the residents of Mason City and contract workers at Grand Coulee Dam.
2020-10-28
2020-10-28
Third Volume, Twenty Sixth issue, of the Mason-Walsh-Atkinson-Kier CO. builders of Coulee Dam Safety Newsletter. Created by the Safety Department and issued to the residents of Mason City and contract workers at Grand Coulee Dam.
2020-10-28
2020-10-28
The hydraulic model of Grand Coulee Dam, built to a scale of 1 inch equals 5 feet. Operating automatically, the model displays, in a 5-1/2-minute prior, the principal hydraulic features of the dam as they will occur during a typical year.
2020-10-28
2020-10-28
Department of the Interior: Bureau of Reclamation Columbia Basin Project - Washington: Grand Coulee Pumping Plant Excavation Plan
1936-04-07
2020-10-28
Looking westerly along downstream cross-river cofferdam. Center tower of suspension bridge at the right. Block 40 in the center.
1937-08-13
2020-10-28
Cantilever and whirley cranes on elevation 1024 and 950 trestles.
2020-10-28
2020-10-28
These completed sections of the penstock liners are awaiting transportation to the dam. The 18-foot diameter tubes, each 292 feet long, were made up of 15 sections of cylinders up to 23 feet long, and weighing up to 39 tons. The 18 liners had a...
2020-10-28
Dumping a 4-yard concrete bucket in a form near the high trestle.
1936-05-19
2020-10-28
Special footings for bents of trestles, at crevices in foundation.
2020-10-28
2020-10-28
Looking southeast at Block 40, timber plug on spillway to section "G" of west cofferdam, ends of the two placing trestles, and cell cluster in section "D";
1936-06-26
2020-10-28
East end of dam showing fillet upstream. Cantilever crane on high trestle.
1937-04-23
2020-10-28
Blocks in dam near bedrock, looking west from block 30 - low placing trestle in upper right.
1936-03-03
2020-10-28
Steel erection in progress for the new mixing plants showing the twin set-up at the 1180 level.
1938-07-25
2020-10-28
Cantilever and Whirley-type crane assembly on the two concrete placing trestles.

2020-10-28
Work in progress on the arch barrel for the spillway bridge in bay #11.
1941-07-15
2020-10-28
Blocks in east abutment between high and low trestles. Reinforcing is around penstock blackouts.
1937-04-23
2020-10-28
Bedrock and concrete blocks in west area; low trestle, and conveyor bridge to Westmix on the right; high trestle on the left.
1936-01-30
2020-10-28
View of downstream face of dam, showing left powerhouse in foreground, and drum gates in upright or "close" position in the spillway section. River surface elevations as follows: upstream, 1139.70, downstream, 941.6.
1941-03-31
2020-10-28
West cofferdam nearing completion. Excavation spoil conveyer in upper left hand corner. Contractor's cast field office, warehouse, and machine shop in foreground.
1935-02-26
2020-10-28
Looking west along axis of dam, showing east ends of high and low trestles in near foreground, and area enclosed by cross-river cofferdam; and to left of center the "ice" dam and its refrigeration plant.
1937-02-01
2020-10-28
In November 1938, the contractor's construction trestle with deck at el. 1180 spans mass concrete in the dam totaling about 5,200,000 cubic yards. At the left powerhouse, the transformer structure concrete has been completed to elevation 1012.5...
2020-11-28
2020-10-28
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