Workers with jackhammers excavate behind a cofferdam at Grand Coulee Dam. A concrete wall extends along one edge of the work site.https://dc.ewu.edu/blonk/1503/thumbnail.jp
Several workers are on newly poured cement for the foundation of Grand Coulee Dam. A four-yard bucke...
Early construction work at the dam site. Removal of overburden was under way. View looking upstrea...
Working with air drills to remove fractured rock from the dam site before pouring the foundation for...
Workers with jackhammers excavate behind a cofferdam at Grand Coulee Dam. A concrete wall extends al...
A bulldozer and dump trucks move earth behind a cofferdam at Grand Coulee Dam. A concrete wall lines...
Workers shovel dirt behind a cofferdam at Grand Coulee Dam.https://dc.ewu.edu/blonk/1453/thumbnail.j...
A large concrete wall behind the cofferdam at Grand Coulee Dam. The wall is grooved and contains lar...
Construction at Grand Coulee Dam, showing several aspects of work. Drillers with air drills working...
Excavation work for the construction of Grand Coulee Dam.https://dc.ewu.edu/blonk/1122/thumbnail.jp
Snow covers an excavation site behind a cofferdam at Grand Coulee Dam.https://dc.ewu.edu/blonk/1508/...
A crane runs in the construction area behind a cofferdam at Grand Coulee Dam. In the lower left, the...
Excavation of soil and loose rock, and work on the cofferdam were under way on the east end of the d...
Newly poured sections of foundation are visible beneath a railway trestle at the Grand Coulee Dam co...
Men position a four-yard bucket over the foundation of Grand Coulee Dam.https://dc.ewu.edu/blonk/147...
A view of from behind a cofferdam at Grand Coulee Dam.https://dc.ewu.edu/blonk/1451/thumbnail.jp
Several workers are on newly poured cement for the foundation of Grand Coulee Dam. A four-yard bucke...
Early construction work at the dam site. Removal of overburden was under way. View looking upstrea...
Working with air drills to remove fractured rock from the dam site before pouring the foundation for...
Workers with jackhammers excavate behind a cofferdam at Grand Coulee Dam. A concrete wall extends al...
A bulldozer and dump trucks move earth behind a cofferdam at Grand Coulee Dam. A concrete wall lines...
Workers shovel dirt behind a cofferdam at Grand Coulee Dam.https://dc.ewu.edu/blonk/1453/thumbnail.j...
A large concrete wall behind the cofferdam at Grand Coulee Dam. The wall is grooved and contains lar...
Construction at Grand Coulee Dam, showing several aspects of work. Drillers with air drills working...
Excavation work for the construction of Grand Coulee Dam.https://dc.ewu.edu/blonk/1122/thumbnail.jp
Snow covers an excavation site behind a cofferdam at Grand Coulee Dam.https://dc.ewu.edu/blonk/1508/...
A crane runs in the construction area behind a cofferdam at Grand Coulee Dam. In the lower left, the...
Excavation of soil and loose rock, and work on the cofferdam were under way on the east end of the d...
Newly poured sections of foundation are visible beneath a railway trestle at the Grand Coulee Dam co...
Men position a four-yard bucket over the foundation of Grand Coulee Dam.https://dc.ewu.edu/blonk/147...
A view of from behind a cofferdam at Grand Coulee Dam.https://dc.ewu.edu/blonk/1451/thumbnail.jp
Several workers are on newly poured cement for the foundation of Grand Coulee Dam. A four-yard bucke...
Early construction work at the dam site. Removal of overburden was under way. View looking upstrea...
Working with air drills to remove fractured rock from the dam site before pouring the foundation for...