Colligan RiverThe Colligan River is a fast-flowing river in Ireland, flowing through County Waterford. It is reputed to be one of the fastest in Europe.CourseThe Colligan River rises in the Monavullagh Mountains, flows southwards under the Scart Bridge, passes under the N72 at Kildangan, and then turns eastwards into a wide estuary at Dungarvan. It is bridged by the N25 and R911 before entering the Celtic Sea.RecreationThe Colligan River is a noted salmon and trout fishery. It is also used for whitewater kayaking.ParishColligan gives its name to a civil parish northeast of Dungarvan in the barony of Decies-without-Drum. There was formerly a roughly coterminous Catholic parish in the Diocese of Waterford and Lismore, which gave its name to Colligan–Emmets GAA club. The Catholic parish was later merged with Kilgobinet parish.