Friday 13th October 2023
John took a day off and we headed to Grand Coulee town and took a tour of Grand Coulee Dam. The tour took an hour, was on a first come basis and was free. After having our belongings checked by police and passing through an x-ray machine we loaded up onto a mini bus and were driven to the entrance to the dam. We then rode a Westinghouse elevator down into the heart of the dam to see the pumps. After that we drove along the top of the dam. You used to be able to drive along the dam but since the Oklahoma bombings and the 9/11 the area is very heavily guarded.
The tour was very simple and I have read reviews criticizing it for it's limited access and content but we enjoyed it. They have a laser light show each evening that would have been cool to see but that had ended for the season.
Grand Coulee (map) 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 downstream river surface to the top of the dam.
The main difference between the Grand Coulee Dam and the Hoover Dam is their size. The Hoover Dam is 726. 4 feet (221.4 meters) tall and 1,244 ft (379 m) wide. The Grand Coulee Dam is 550 ft (168 m) tall and a whopping 5,223 ft (1592 m) wide!
https://www.usbr.gov/pn/grandcoulee/visit/
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12 pipes and tunnels each large enough to drive a truck through have water pumped through them over the hill to fill Banks Lake |
When the final generator came online at the Nathaniel Washington Power Plant in in 1980, Grand Coulee Dam became the largest hydropower generating complex in the United States with a generating capacity of more than 6,809-megawatts supplying up to 21 billion kilowatt hours of electricity. In addition, Canada receives power under the Columbia River Treaty. Grand Coulee Dam is operated as part of a coordinated federal system of hydroelectric facilities, which provides 35% of the entire power supply of the Pacific Northwest.