[ulfw]

They create more electricity at night when less electricity is generally consumed? Odd. But interesting.

[londons_explore]

They want niagara falls to look great for tourists.

When nobody is looking at night, it pretty much stops.

[Scoundreller]

Not only that, but so much water gets diverted during the night that the tourist ships could not operate.

Reducing water flow helps to preserve the falls too. The water has substantially changed their shape, even over a time period of 2-300 years: https://www.marriottonthefalls.com/blog/2015/02/06/rate-eros...

During the Post-Great Big Blackout period, the Falls power generation ran with night-time levels of diversion during the day-time. The tourist boats that go near the falls got furloughed.