Operator of vessel was traveling south on the Housatonic River approximately 100 yards south of buoy 14 and Birdseye boat ramp. Operator was participating in River Lights boat parade. Operator stated he was unfamiliar with the area and got off course causing him to strike break wall which was on his starboard side. Break wall was not visible due to high tide. Vessel struck break wall and became stuck on top. Vessel was taking one water at the time. Seven passengers on board  all wearing life jackets. All seven were removed from vessel by police and transported to boat ramp. No injuries.
Stratford