Vessel 1, airboat, with two people on board was motoring downstream just east of the Hwy 81 bridge south of Columbus.  Airboat veered near the back and collided with rip rap on the bank and both persons were ejected from the airboat.  The operator suffered a head injury from striking the rip rap and was hospitalized.  Damage to the airboat estimated to be about $1000.
Columbus                      