RedactedNarrative: Operator and passenger were on a PWC on Grindstone lake on the southern side of the lake.  There were waves over 6 inches tall and weather conditions were cloudy and windy.  Operator stated that she did not know her speed but estimated over 10 mph.  Operator stated that she hit a large wave and she and the passenger were ejected from the PWC.  The Operator was not injured but the Passenger had a dislocated shoulder due to the incident.  The Passenger was picked up by a family member in another boat and was taken to shore where he was transported to the local hospital.