RedactedNarrative: Subject was attempting to retrieve an anchor in the rear of his vessel.  Note:  His vessel (LA-1109-GA) was stationary at this time.  While retrieving the anchor, it became lodged on an underwater structure.  As Subject was pulling in the anchor, the vessel dipped below the waterline and began to fill with water.  The vessel began to sink, and Subject eventually fell overboard.  Subject was wearing his PFD when he entered the water.  At this time, Subject began to call (yell) for help, and was heard by individuals on the bank.  These subjects then called 911.  Caddo Sheriff's Department and Fire Rescue 1 arrived on the scene.  Subject was eventually located by emergency personnel, and brought to shore.  Subject was exposed to cold water for approximately forty-five minutes, and was taken to Willis Knighton North hospital and treated for hypothermia.