I ran Ruby to Stone Bridge last Saturday (5/31) at 3640. I have a 16 foot Downriver Cat with 25 inch tubes so it might sit a bit higher than a regular boat. I barely made it under the bridge. I had to remove my rowers chair and squat way down on the floor. The boat just made it under the bridge and my shoulders actually rubbed on the bridge girders. If the water gets any higher, i will only float to hecla next weekend.