Trent Severn waterway closing temporarily Belleville, ON, Canada / Quinte News John Spitters Jun 18, 2022 | 4:46 AM Much of the Trent-Severn Waterway will be closed to boat traffic starting Monday. Due to high water levels and fast flows Parks Canada will shut down 18 locks starting with Lock 1 at the mouth of the Trent River in Trenton and heading north.