RedactedNarrative: THE PARTY INVOLVED WAS OPERATING SOUTH WEST ON THE ROCK RIVER, TOWARDS THE ELLENDALE BOAT LAUNCH, JUST WEST OF THE INTERSTATE 90 BRIDGE. BASED OFF STATEMENTS GIVEN, THEY WERE OPERATING ON PLANE AT ABOUT 20 MPH WHEN THEY HEARD A LOUD THUD AND OBSERVED THE MOTOR AT AN UNUSUAL ANGLE. THEY THEN OBSERVED WATER COMING THROUGH THE FLOOR BOARD AND TOOK ON WATER VERY QUICK. DUE TO THIS, THE BOAT EVENTUALLY CAPSIZED, SANK, AND OVERTURNED. TWO OTHER MEMBERS OF THE PARTY WERE ON PWC'S NEARBY AND ASSISTED THEM TO SAFETY. THE CAPSIZED BOAT WAS TOWED TO NORTH ELLENDALE AND EAST KNUTSON ROAD BOAT LAUNCH BY THE 2 PWC'S REFERENCED BEFORE. NO INJURIES OCCURRED.