RedactedNarrative: OPERATOR OF VESSEL ONE WAS TRAVELING WEST ON THE ARKANSAS RIVER WHEN HE POSSIBLY STRUCK AN UNFORSEEN UNDERWATER OBJECT OR THE BANK; AS THE OPERATOR WASN'T SURE.  AS A RESULT, THE STARBOARD SIDE PONTOON WAS PUNCTURED AND CAUSED THE VESSEL TO BECOME PARTIALLY SUBMERGED ON ONE SIDE (STARBOARD).  Operator1 was arrested for BUI.