This is Chief Joseph Dam, on the Columbia River. It’s the 2nd largest electricity-producing dam in the USA, after Grand Coulee Dam, just up the road a bit. The Columbia River is God’s gift to Washington.
According to this listing, there are 1166 dams in the State of Washington: https://fortress.wa.gov/ecy/publications/documents/94016.pdf
Chief Joseph Dam is a beauty!
Here’s a listing with photos of many of the dams in our area: