RedactedNarrative: "Returning to mainstream current, strong current grabbed the backend of boat and spun it so that rower was not able to continue rowing away from a tree (bank hazard). Current pushed boat towards outside river bank and into/under a tree overhanging the water (aka sweeper). Impact with the tree immediately capsized the boat. All occupants were immediately free of the tree. One eddied to bank immediately. One eddied to bank within 100 yard. Operator remained with boat attempting to arrest its downstream travel before it became evident that current was too strong to stop the boat. Operator was pulled from water by another raft."