The massive Grand Coulee Dam, on the Columbia River, is the largest concrete structure in the U.S., the largest hydroelectric facility in the U.S., and the sixth-largest hydroelectric facility in the world. It provides irrigation for up to 1.1 million acres of agricultural lands and the hydroelectric complex maintains a generating capacity of 6.8 million kilowatts. It also serves as the primary flood control for the Columbia River basin (with a capacity of 5.18 million acre-feet of water) and provides recreational opportunities on the 150-mile-long Franklin D. Roosevelt Lake.
Columbia Basin Commission
![Grand Coulee Dam](/sites/default/files/styles/landmark_node_/public/landmarks/images/Grand_Coulee_Dam.jpg?itok=VcNMntPA)
YearAdded:
Image Credit: Courtesy Flickr; //lucylu (CC BY-ND 2.0)Image Caption: Grand Coulee DamEra_date_from: 1941
1997
Innovations
![Grand Coulee Dam](/sites/default/files/styles/thumbnail/public/landmarks/images/Grand_Coulee_Dam.jpg?itok=3qm4BvY0)
The massive Grand Coulee Dam, on the Columbia River, is the largest concrete structure in the U.S., the largest hydroelectric facility in the U.S., and the sixth-largest hydroelectric facility in the world. It provides irrigation for up to 1.1 million acres of agricultural lands and the…
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