Had a good friend go in there 16,000+, some years back........ and he's knows cross very well, also awesome boater...... well anyway the way I remember him telling it was something like runaway frieghttrain, knock over, out of my boat instantly, pinned to the bottom of the river, total darkness, Thought I was a goner, popped 1/2 mile down the river, and all he'd remembered was his mother asking him if he had his lunch money!!
It was kind of funny but i don't think he goes in there any more above 10,000??
If you go share your run with us........