We put in at WA to make run longer and both Fish bridge and Stone bridge were very low clearance. My high back tractor seat missed the bottom of Stone Bridge by probably less than a foot. I'd pull off before trying to go under stone bridge if you are not sure.I ran it last Saturday as well. Ran from Ruby to Stone Bridge at 3600. Not very many commercial boats but there were a ton of privates hanging out at the put in at Ruby. (Come on folks, lets get in, shuttle, and get going....). All the rapids are full of water and as others have said its a read and run using the standard Browns Canyon Left to Right paths. The only note of caution is that at 3600, I just barely got under the Stone Bridge. Had to remove rowers seat and and squat way down on floor and my shoulders still rubbed the bridge. I have a 16 foot cat so it probably sits a bit higher than a boat.
Its a great year to be on the Ark....lotsa water.