A drive-by shot of the water side of Grand Coulee Dam. Note the extensive system of power lines required to transmit the power across the country.
Grand Coulee Dam is a hydroelectric gravity dam on the Columbia River near the middle of the state. In the United States, it is the largest electric power producing facility and the largest concrete structure. It is the fifth largest producer of hydroelectricity in the world. Grand Coulee Dam is almost a mile long at 5223 feet (1586 m). At 550 feet (168 m), it is taller than the Great Pyramid of Giza. Its hydraulic height of 380 feet (115 m) is more than twice that of Niagara Falls. In addition to producing up to 6.5 million kilowatts of power, the dam irrigates over half a million acres of Columbia river basin farm land and provides abundant wildlife and recreation areas. It forms Lake Roosevelt, extending upstream 151 miles (243 K) to the Canadian Border with a 600-mile (965K) shoreline.