Grand Coulee Dam is a concrete gravity dam on the Columbia River in the U.S. state of Washington, built to produce hydroelectric power and provide irrigation water. Constructed between 1933 and 1942, Grand Coulee originally had two powerhouses.

Explore the dam, take part in the D3 Geocache Challenge, view the Laser Light Show, and come inside the Visitor Center to experience the hands-on exhibits!

Grand Coulee Dam, on the Columbia River west of Spokane, Washington, is one of the largest structures ever built by mankind--a mass of concrete standing 550 feet high and 5,223 feet long--or just shy of a mile.

Discover the Heart of the Coulee: Your Ultimate Guide to Unforgettable Experiences, Attractions, and Hidden Gems. Explore Grand Coulee Dam's Rich History, Breathtaking Scenery, and Thrilling Adventures Today!

The largest and most complex of a series of dams on the Columbia River, the Grand Coulee provides irrigation to the Columbia Basin Project, assists in flood control, simplifies navigation, and furnishes hydroelectric power.

Dec 8, 2024 · Admission is free to watch the laser light show and to join a public tour. The Grand Coulee Dam Visitor Center remains open daily from 9 a.m.–5 p.m. PDT, free of charge.

Grand Coulee is home to the Grand Coulee Dam, the largest hydro-power generating facility in the United States, which also provides water for the Columbia Basin Project. With Lake Roosevelt on its eastern border and Banks Lake to the west, outdoor recreation is a …

Grand Coulee Dam includes three major hydroelectric power generating plants and a pump generating plant. The facilities provide power generation, irrigation, flood control, stream flow regulation for fish migration, navigation, and recreation.

Grand Coulee is the largest dam in the Columbia River Basin and one of the largest in the world. Everything about the dam is large: it is 550 feet (167.6 meters) tall, measured from its foundation in solid granite, or approximately 350 feet (106.7 meters) from the …

Grand Coulee Dam is a concrete gravity dam located about 1 miles from Coulee Dam City, Okanogan, Washington. The dam, which is on the Columbia River, was primarily built for flood risk reduction purposes, but also serves for Irrigation benefits.