GRAND COULEE DAM Grand Coulee Dam is located on the Columbia River in the US state of Washington. It is a gravity dam which is built to produce hydroelectric power and provide irrigation. Grand Coulee Dam is the largest electric power-producing facility in the United States.
Grand Coulee Dam Laser Light Show, Coulee Dam, Washington. Grand Coulee is a great place to visit if you enjoy camping and water sports. Seeing the lazer show at the dam is AMAZING, especially with the water rushing behind it