How often does it freeze completely? I’ve seen an old photo of Niagara Falls when it was frozen solid, with dozens of people walking on the ice above and below the falls.
For moving water to freeze, it must get very cold.
Not sure but probably not every year. These photos show the water still flowing over the falls so it’s not completely frozen solid.
My Grandparents on my Dad’s side honeymooned in ‘31 at Niagara Falls - they took pictures of themselves on the frozen falls, prized and great conversation pictures...
“How often does it freeze completely?”
I’ve heard that it never has. And that it did in 1848, for about a day. Now it probably can’t.
In 1964, a boom was been installed on the river to prevent large ice jams, making a total freeze-up highly unlikely today.”