RedactedNarrative: According to the operator and witness statements, the vessel began taking on water due to waves coming over the gunwale and stern while they were drifting downriver from Wheeler Dam.  The additional water caused the vessel to capsize.  The strap of victim's pfd got hung up on the throttle, as the vessel was capsizing.  The operator and passengers were in the water and began trying to help victim get free.  A fisherman that was on shore swam to them and assisted them.  Subject was able to release victim's pfd strap and another subject began CPR to revive him.  victim was transported to ECM hospital, and was required to remain overnight for observation.  He was also transported to ECM for chest pains, and was treated and released the same day.