As I said then, I'll let the photos speak for themselves . . .
The roar was awesome. It looked as if the whole gorge wall had opened up like the side of a skyscraper down it came. Rocks and masonry burst into the air splitting into thousands of pieces and pelted the river like shrapnel. And a few fell on the Canadian side. A jet stream of water was unleashed. Three violent blasts followed. The river turned a sickly brown. White smoke poured upward from the gaping gorge mouth and the resounding echo died.
[Thanks to Thunder Alley for compiling the news reports of the day, nearly 60 years ago]