RedactedNarrative: A jon boat, 14'' in length with three adults aboard, is operated in weather and water conditions that caused boat to swamp.  Two of three occupants rescued by a second boat.  Third adult and operator is recovered from location attached, and in immediate vicinity of incident.  The 1st boat carrying victims bow sank below surface and witnesses stated all three began an attempt to swim to shore south of incident.  The second boat that rescued the 2 injured persons was at location DMS N 39.28041052674811, W -96.63461780495709.  Boat was launched from ramp SW of incident location of N 39 17.008', W -096 38.116' by witness .  Witnesses came from south shore.  witness was on north shore and took picture.