Notoriously fatal river features
I have to give an informative speech and have decided to talk about deadly river features, their history, and proposals or actions taken to make the features more safe.
If anyone knows of any notoriously fatal features I would love to hear about it.
I know of Dimple Rock on the Lower Yough, and Frog Rock on the Ark. I also remember reading somewhere about a rapid that was blown up by some raft guide, but can't remember the name of it.
Please reference journals or articles that have some credibility. Also this is an INFORMATIVE speech so opinions are not needed, just facts.