Comment by iracigt
1 day ago
Not only that, they use the gravitational potential of the falls to store massive amounts of energy when there's a surplus. Way cheaper to hold or even pump the water back up to the reservoir at the top than build lithium batteries. So yeah, as a local, can confirm they turn Niagara Falls (partially) off at night. Thanks to the Falls and several nuclear plants on Lake Ontario, Upstate NY and Southern Ontario have some of the lowest carbon electricity in the countries. Quebec is even better with basically all of their power coming from hydro.
See also https://en.wikipedia.org/wiki/International_Control_Dam
The Ginna nuclear plant is the second oldest in the US and is on a license extension that expires in three years. There is nothing to replace that capacity. Western NY is going to see significant price hikes because of this short-sightedness.