Nice selection of pictures and stories.
Would be hard to convince those folks about the new green deal!
Jerry, after looking at those scenes I need another cup of coffee..BURRR!
They are and have always been moving back. The falls really only get about 1/10 the real flow, the other 90% is diverted for the power plant. This slows the erosion. Also about a decade or two back they shut off the entire flow and did some work on the rocks to also slow the erosion.