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- Collection: Grand Coulee Dam
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GrandCouleeDam. NWC019.046
Below river. Drillers safe from surging waters behind a protecting cofferdam.
GrandCouleeDam. NWC019.045
Excavation below river level. Excavation activities in unwater riverbed section. March 1937.
GrandCouleeDam. NWC019.041
Typical powerhouse section - Grand Coulee Dam & Typical Spillway Section - Grand Coulee Dam.
GrandCouleeDam. NWC019.040
The Bucket. Downstream face of spillway with powerhouse foundation beyond.
GrandCouleeDam. NWC019.039
Cold Concrete. Nearly 2,000,000 cubic yards of it in west end of dam with Columbia diverted through low section.
GrandCouleeDam. NWC019.038
Columbia River Diverted. Two cross-river cofferdams divert stream through low sections in west portion of dam while east portion is unwatered for preparation of foundation.
GrandCouleeDam. NWC019.037
Source of supply for the eleven million yards of sand and gravel required for the Grand Coulee Dam.
GrandCouleeDam. NWC019.036
Gravel Pit. Deposit from which concrete aggregates are excavated by electric shovels and belt conveyors at a rate of 2500 tons per hour.
GrandCouleeDam. NWC019.035
Deepest foundation depression. Ice dam restraining the muck from flowing into pit.
GrandCouleeDam. NWC019.034
"Ice Dam" - Muck flowing into deep depression in bedrock, stopped by artificially frozen arch dam.
GrandCouleeDam. NWC019.033
Facilities for visitors. Some 200,000 visitors in 1936 inspected a model of the dam and from sheltered seats close to the work on each side of the river viewed the construction work and had it explained over a public address system.
GrandCouleeDam. NWC019.032
Cooling pipe. Water will be circulated through 2000 miles of it embedded in the dam to cool and shrink the concrete and thus facilitate grouting of construction joints.
GrandCouleeDam. NWC019.031
A "House of Magic" - One of two concrete mixing plants, capacity 8,000 cubic yards per day each.
GrandCouleeDam. NWC019.030
The checkerboard. The pouring of concrete into interlocking blocks permits grouting of contraction joints to form monolithic mass.
GrandCouleeDam. NWC019.028
Upstream Face Grand Coulee Dam. 1,550,000 cubic yards of concrete in place.
GrandCouleeDam. NWC019.027
Jackhammer Men - with hard hats and safety belts they trim steep abutment slopes.
GrandCouleeDam. NWC019.021
Concrete placing - January 1936. Top of dam 280 feet above high trestle deck.
GrandCouleeDam. NWC019.020
Governor Clarence D. Martin formally placing first concrete in dam, December 6, 1935.
GrandCouleeDam. NWC019.018
Belt conveyor - Transporting excavated material to Rattlesnake Canyon, 1 1/2 miles distant.
GrandCouleeDam. NWC019.016
Excavation - Five-yard shovel loading ten-yard buggies - excavating overburden from dam foundation.
GrandCouleeDam. NWC019.014
West cofferdam, March 31, 1935. Length, 3000 feet, height 115 feet, over 17,000 tons steel piling, constructed in ninety days.
GrandCouleeDam. NWC019.013
Government camp and highway bridge, 1936. Upstream is west cofferdam, concrete placing trestle, and west conveyor.
GrandCouleeDam. NWC019.012
Builders' Quarters - Government camp in the foreground; contractor's camp across the river - 1936.
