That would have to be a damned BIG sailboat, to be non - clearing on the Interstate Bridge, or I - 205 upstream on the Columbia River. Both bridges have a 35+ foot clearance except during extreme spring water flows. I've personally seen the paddlewheel steamer clear Interstate Bridge while it was down, as I was driving across it at the time.
Your argument would have been better served by referencing the BNSF Railway bridge just downstream from Interstate Bridge, an older, lower structure whose swing span has to open much more often than Interstate bridge.
Your turn...