Grand Coulee Dam: The dam on the Columbia river is the largest concrete structure in the United States. Charles Hubbard provides history, photographs and bibliography.
Grand Coulee Dam: History, photographs, and statistics from the Bureau of Reclamation.
Grand Coulee Dam Collection: Materials on the building of dam from the University of Washington Libraries' digital initiatives program.
Grand Coulee Dam Photo Gallery: Large collection of construction, dam equipment and dam exterior photographs.
Over the Dam Race: A range of details on the race across the largest concrete structure in North America.
Wikipedia: Grand Coulee Dam: Construction history and related links.