On August 23, 2017, at 0756 local time, the towing vessel Gracie Claire was moored in Tiger Pass near mile marker 10 on the Lower Mississippi River in Venice, Louisiana.1While taking on fuel and water, the towboat began to slowly list to starboard. After the wake of a passing crewboat washed onto the Gracie Claire’s stern, the list increased. In a short period of time, water entered an open door to the engine room and flooded the space. The towboat sank partially, its bow being held above the water by the lines connected to the dock. All three crewmembers escaped to the dock without injury. Approximately 1,100 gallons of diesel fuel were discharged into the waterway. Damage to the Gracie Claire was estimated at $565,000.