Grand Coulee Dam is an impressive architectural feat along the Columbia River in Washington State, originally constructed between 1933 and 1942 to create hydroelectric power and provide irrigation water. Visitors can observe historical photos of the dam or view turbine models and geological samples at the dam's visitor center. Today, its three powerhouses have brought its production capacity up to 6,809 megawatts, making it the largest power station in the United States. Guided shuttle tours of the dam's third powerplant are offered periodically, lasting approximately one hour. Since 1989, the dam has presented a free nightly laser light show on its walls every evening throughout the summer months.

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