11 Dec DID YOU KNOW? Facts and History about the Columbia Basin Project
Posted at 17:40h in Voice of the ProjectDID YOU KNOW? Grand Coulee Dam was built over 75 years ago to help satisfy the nation’s need for electricity at a time of growing manufacturing, industry, and war. Construction started in 1933 and finished in 1942. First water flowed over the spillway on June 1, 1942. • Grand Coulee Dam was once the largest concrete structure in the world: 550 feet tall (almost two football fields) and 5,223 feet long—just short of a mile. • Building the dam foundation required excavating more than 22 million cubic yards of earth and stone--enough to fill 10 Rose Bowls.