Not sure about the exact clearance, but I'd buy something as low profile as possible. I have a Nautic Star 19 Hybrid and have to remove my windshield every time I pass under the bridge. Be dang careful too. I smacked the side a few weeks ago and did $4200 in damage! It is a challenge when people are fishing directly in the entrance and the current is racing. There is a youtube video of a center console passing under it. Just search Bayou Vista RR bridge. Oh yeah, and don't forget to take your rods down!