RedactedNarrative: Single vessel collision. Vessel 1, a 2005 21' Bayliner (FL-1986-NA) was headed westbound through the fender system of the U.S. Hwy 11 and Norfolk Southern Railroad bridges in Lake Pontchartrain, on plane. Operator did not see that the draw of the railroad bridge was down and hit it. The momentum of vessel one carried it under the bridge. Vessel 1 then headed to a dock.  
  
  Operator sustained head injuries and was treated at University Medical Center in New Orleans. None of the other seven persons on board were injured in the incident. PFD's were on board but were not used. Operator stated to Sgt.  that he had consumed 4 beers, a Norco, and a Xanax that day and  submitted to blood testing, results pending. Use of alcohol and drugs is suspected.  The operator's BAC as .13 Therefore alcohol has been substantiated as a contributing factor in this incident.