My work friend who did his thesis on St Anthony Falls was saying in the 60s the river was high enough to damage the Stone Arch Bridge to the point that there was concern of its collapse. That was at 60,000 cfs.

It’s currently at 75,000 cfs and water is hitting the limestone pic.twitter.com/7YZfKa3Lt8

— Jordan van der Hagen (@TheJvandy) April 19, 2023