Approximate - nearest available gauge. Use as general reference only.
Dave's Falls has been run many times since at least back in the 1980s, if not earlier. (I've even heard rumor of at least one early daredevil intentionally running it backwards!) While some who have run it have claimed it's much smoother/easier than it looks, there are at least as many reports of nasty/ugly runs.
There is a fine pool below (to have a safety boater staged to collect any 'yard sales' which may occur). Exit river-right for a fairly easy short carry back to the parking area for Dave's Falls County Park.