A Dracut man was charged with operating a boat while intoxicated after two boats collided on Lake Winnipesaukee late Friday night, injuring several people, authorities said. At 10:24 p.m., the New Hampshire State Police’s Marine Patrol responded to the crash in Wentworth Cove, where officers administered first aid until Gilford and Laconia fire boats arrived, according to a statement issued by Marine Patrol officials. Four people were taken to Lakes Region General Hospital in Laconia for injuries ranging from a fractured arm to potential internal injuries, the statement said. Barry K. Myers, 50, of Dracut, refused treatment and was later arrested and charged with boating while intoxicated. Both boats were severely damaged. The Marine Patrol’s accident reconstruction team is investigating.