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Vibrating concrete in east training wall, using Jackson 2-man machines operating at 4,800 r.p.m. 145 volts.
1936-05-19
2020-10-31
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
2020-10-31
East end of dam, and high and low trestles. Reinforcing for penstock blackouts. East power house substructure in foreground.
1937-07-09
2020-10-31
The Wesley A. D'Ewart Collection contains campaign materials, speeches and writings, correspondence, and research materials accumulated by Mr. D'Ewart. Subjects include campaign materials and election returns pertaining to the...

Grand Coulee Dam is of the straight-gravity type, depending entirely upon the weight of the structure to resist the pressure of the water behind it, tending to overturn it or cause it to slide on its base. The river canyon was too wide for a dam...
2020-10-31
Third Volume, Thirty Fourth 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.
2020-10-31
2020-10-31
Concrete block on east abutment, showing grouting and drainage tunnel and upstream fillet.
1937-04-23
2020-10-31
Third Volume, Second 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.

2020-10-31
Grand Coulee Dam Concrete Mixing Plant

2020-10-31
Spillway section of the Grand Coulee Dam, with the erection of falsework for the spillway bridge arch barrels in progress.
1941-07-15
2020-10-31
Diamond core drilling rigs set at the Grand Coulee Dam site.
1934-03-02
2020-10-31
View of the reservoir and the upstream face of the Grand Coulee Dam, from the west abutment. The pumping plant wing-dam appears in the foreground. The reservoir water surface is at elevation 1243.3, and the water surface downstream from the dam is...
1941-12-31
2020-10-31
General View of the Grand Coulee Dam, looking to the south. The Government Camp 'Coulee Dam' appears in the right foreground. Above the spillway section of the dam may be seen the wooden forms over which eleven archetype bridges will be...
1941-08-06
2020-10-31
Department of the Interior: Bureau of Reclamation; Columbia Basin Project-Washington Grand Coulee Dam Government Camp - Water System General Plan
1934-03-13
2020-10-31
When the United States Government learned that the Columbia Basin Commission had approved and executed the contract between the government and the Commission for the construction of Grand Coulee Dam, it called for bids for excavating some...
1934-01-06
2020-10-31
Consists of personal and job-related photographs and published and unpublished essays from his work as an irrigation engineer, much of which focused on flood control. Most of the essays are typed reports to government agencies.; Biographical Note;...

Joining of two ends of elevation 1024 trestle after waiting for approved rock on sides of crevice in foundation. Upstream crossriver cofferdam in distance, June 30, 1937
1937-06-30
2020-10-31
Removing rock in area east of block 40; elevation 1024 trestle under construction toward east end, June 04, 1937
1937-06-04
2020-10-31
Exposed bedrock in the center section, looking west toward block 40. Derrick equipment mounted on the steel cell on the left, and other equipment to be mounted on the timber crib located on the rock, are to be used for cleanup of rock, and for...
1937-04-29
2020-10-31
Excavating behind section "C" of west cofferdam for entrance of diverted river through four low blocks in west end of dam. Left foreground shows section of main 60-inch conveyor carrying material to spoil bank in Rattlesnake Canyon. In right...
1936-08-25
2020-10-31
This shows a section of the spillway bucket before backfilling along the lower lip. The bottom of the bucket is at elevation 869.88, and the top of the lower lip at elevation 900. Since three contraction joints occurred in the curved portion of...
2020-10-31
East end of high trestle with cantilever concrete-placing crane. Grouting and drainage gallery shown in foundation blocks.
2020-07-31
2020-10-31
Concrete placed in east end of dam, as of December 19, 1936
1936-12-19
2020-10-31
Westmix plant and under construction the high and low concrete placing trestles. Several sections of the 60-inch spoil conveyor in the distance.
1935-11-30
2020-10-31
Jackhammer crews are here shown working on final bedrock just east of block 40. The buttress wall in the background contains 3,000 cubic yards of concrete, and was rushed to completion as a continuous pour in a week's time. It was placed to...
2020-10-31
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