Coulee Corridor Scenic Byway
Grand Coulee Dam, WA

Grand Coulee Dam is a large hydroelectric dam located on the Columbia River. Constructed from 12 million cubic yards of concrete, it is the largest concrete structure in the United States and the third-largest hydroelectric facility in the world. Sharing the river with 10 other US dams, Grand Coulee is the first dam encountered on the Columbia after the river enters the US from Canada. Watch the world's largest laser light show nightly on the face of the dam, Memorial Day weekend through September. Guided tours are also available to see the dam.