Oak Harbor Marina is located in the Twin Span Bridge in the Grand Lagoon but it is also near Lake Pontchartrain. With 50' X 4' finger piers on both sides of each slip, we have three fixed docks with roomy slips that can accommodate vessels up to 20' broad and 55'+ long. Each slip also offers water and cable, as well as two 30amp or a 50amp and a 30amp power hookup. We also have three T-head slips that can accommodate vessels up to 110 feet long. The main pier and T-heads are both 10 feet wide. For more information, please call 985-641-1044