Posted at 17:40h
DID YOU KNOW?
in Voice of the Project
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.