RedactedNarrative: According to the surviving boater the boat flipped over while trying to transition through a 4 foot diversion. The boat hit a standing wave on the starboard side and flipped over throwing both boaters into the water. The current speed was 8.5 miles per hour and the water temperature was 34.5 degrees. The survivor grabbed a bag that was floating and was pushed back to the bank by the current and was able to get out. The other boater was last seen by the survivor trying to swim to the west bank of the river.