- General Information: Grand Coulee Dam is considered one of the largest dams in the world and the largest one in the Columbia River basin.
- For a time, Grand Coulee Dam was the largest concrete structure ever built, but today that distinction goes to the Three Gorges Dam in China, completed in 2009.
- They knew the Columbia Basin could turn into a fertile valley with proper irrigation. The Grand Coulee Dam was the answer to their prayers.
- Begun in 1933 and completed in 1942, Washington State’s Grand Coulee Dam created the Franklin Delano Roosevelt Lake, a reservoir on the Columbia River.
- Congress approved the high dam in 1935 and it was completed in 1942. The first waters over-topped Grand Coulee's spillway on June 1 of that year.
- The Grand Coulee Dam forms part of the US Bureau of Reclamation's Columbia Basin Project which irrigates the central Washington State.
- Grand Coulee Dam is definitely one of the Seven Wonders of Washington, and is quite spectacular to visit.
- The park’s location and use of granite rocks and boulders not only ties it to the history of the construction Grand Coulee Dam, but also lends to its natural beauty.
- At 550 feet tall and 5,223 feet long, the Grand Coulee is the largest concrete structure in the world as well as one of the biggest dams ever created.
- Grand Coulee Dam, gravity dam on the Columbia River in the state of Washington, U.S. It was originally a project of the Federal Bureau of Reclamation.