Vessel struck submerged rock, lost propulsion and was floating down the river.   No injuries but property damage the vessel.  Operator had been advised by the Marina where he was docked not to go out into river due to high water conditions.  Both boat ramps in the area had been closed down as well due to the conditions.  He was towed back to shore by the fire department.  Operator was issued a citation for negligent boat operation.
Gill