RedactedNarrative: ON AUGUST 25, 2021, OPERATOR AND PASSENGER WERE FISHING FROM A LUND V19 OPEN MOTORBOAT ON THE WATERS OF LAKE MICHIGAN DURING THE EVENING AND INTO THE HOURS OF DARKNESS.  UPON RETURNING TO THE SHEBOYGAN HARBOR, OPERATOR INADVERTENTLY MISSED THE OPENING OF THE  TWO BREAK WALLS AND COLLIDED NEARLY HEAD-ON WITH THE NORTHERN CONCRETE BREAKWALL.  UPON IMPACT, THE TWO PEOPLE ON BOARD THE BOAT WERE EJECTED FROM THE BOAT AND ONTO THE BREAKWALL. THE USCG INITIALLY RESPONDED TO THE CRASH AND HELPED PROVIDE AID FOR THE TWO SERIOUSLY INJURED OCCUPANTS. BOTH INDIVIDUALS SUFFERED SIGNIFICANT INJURIES THAT REQUIRED PROLONGED MEDICAL TREATMENT.  THE ESTIMATED SPEED AT THE TIME OF IMPACT WAS APPROXIMATELY 35-40MPH. SPEED, IMPROPER LOOKOUT AND ALCOHOL USE  HAVE ALL BEEN IDENTIFIED AS CONTRIBUTING FACTORS IN THE CRASH.