I looked into this more, and there is quite a bit of seasonal variability to contend with as well.
replyhttps://www.forbes.com/sites/jonbruner/2011/10/20/the-high-s... has some interesting data on the Columbia River and its dams.
replyFrom that https://youtu.be/jvnaiHFT6nQ is a visualization of the water releases for the river to allow the water to get to the right dam for the anticipated power use.
There is no way it’s max is 7MW. They likely meant 7GW.
reply7MW is the amount of power you can get from a couple of diesel gensets, waaaay smaller than even a small power plant
[https://www.cat.com/en_US/products/new/power-systems/electri...]