Bureau of Reclamation

Artist's perspective of Grand Coulee Dam pumping plant. Plant will have twelve pumps, two of which will be designated as standby units for emergencies.

View of the 230-kv switchyard on the hill above the west abutment to the Grand Coulee Dam.

General view of 230-kv switchyard on hill above west abutment to Grand Coulee Dam. Lake Roosevelt is in the distance.

The Grand Coulee Dam, Columbia Basin Project. In the distance can be seen the discharge ends of the pumping plant tunnels, the feeder canal, and the Upper Grand Coulee.

Six 108,000 kilowatt generators, the largest hydroelectric units in the world, operating the West Powerhouse, Grand Coulee Dam, Columbia Basin Project.

Feeder Canal, Columbia Basin Project. This canal leads from the discharge pipes of the Grand Coulee Dam pumping plant to the Equalizing Reservoir in the Upper Grand Coulee.

South Dam, Columbia Basin Project, work on Grand Coulee Dam. This picture shows the concrete cut-off wall which runs the length of the 10,000 foot earth and rock dam in the Upper Grand Coulee.

West Canal, Columbia Basin Project. This picture shows a drilling crew preparing blasting holes in the tough basalt rock in preparation for the Grand Coulee Dam.

Photograph from circular drydock at Grand Coulee Dam in Washington shows floating caisson being built for spillway repair work. Note that caisson is designed to fit curvature of bucket.

Assembling scroll case for generating unit L-7, the first postwar unit to be installed in the West Powerhouse of the Grand Coulee Dam. This scroll case carries water to a giant turbine.