RedactedNarrative: At approximately 1145 hours on june 6, 2014, operator was operating his 16' white 1982 sylvan aluminum boat downstream of bittersweet bridge on the saint joseph river in mishawaka. The boat was on plane when it struck a 2"x8"x8' board floating in the water. The impact caused the boat to come to an abrupt stop throwing occupant overboard. occupant was seated on a raised seat near the stern of the boat. occupant struck the 40hp outboard motor causing a 6 to 8 inch laceration to his head. occupant was transported to saint joseph regional medical center for treatment. The boat had little to no damage. Neither were wearing pfd's at the time of the collision.