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Erne(ûrn), river, 72 mi (116 km) long, rising in Lough Gowna, Co. Longford, N Republic of Ireland. It flows NW through SW Northern Ireland, then back through the Republic before entering the Atlantic Ocean at Donegal Bay. Grazing predominates in the Erne basin; EnniskillenEnniskillen
, town (1991 pop. 10,429), Fermanagh dist., SW Northern Ireland, on Cethlin's Island in the Erne River between Upper and Lower Loughs Erne. Farm produce is traded, and hosiery is manufactured. In 1689 the forces of William III defeated those of James II at Enniskillen.
..... Click the link for more information. is the chief town. In Northern Ireland the river expands to form two large lakes—Upper Lough Erne (10 mi/16.1 km long) and Lower Lough Erne (18 mi/29 km long). An international flood-control scheme (completed 1959) controls the water level in the lakes. Hydroelectricity is produced along the 150-ft (46-m) drop in the river's course between Belleek and Ballyshannon; the lakes are a natural reservoir.
(Lough Erne), a lake in Northern Ireland. Area, 123 sq km; depth, up to 69 m (the deepest lake in Ireland); water level, 46 m. The banks are high and forested. The Erne River flows through the lake, falling into Donegal Bay of the Atlantic Ocean. The lake is navigable.