At 76 miles which is the longest river entirely in Northern Ireland?
River Blackwater (Northern Ireland) despite vigorous campaigning by the counties supporting the Upper Bann Navigation Trust, the government refused to disband it, and it continued to be funded until 1954, when the Ministry of Commerce took over the waterways and effectively closed them. River Blackwater (Northern Ireland) The River Blackwater or Ulster Blackwater is a river in County Armagh and County Tyrone, Northern Ireland. It also forms part of the border between the United Kingdom and the Republic of Ireland, flowing between counties Tyrone and Monaghan, intersecting into Monaghan briefly. Its source is to the north of Fivemiletown, County Tyrone. The river divides County
River Dun, Northern Ireland River Dun, Northern Ireland The River Dun, also known as the Glendun River (in Irish: "Abhann Duinne", brown river) is a river in County Antrim, Northern Ireland. It runs through Glendun, one of the nine Glens of Antrim. The river is named after its brown colour, which comes from the peat bogs at its source on the slopes of Slievenanee on the Antrim Plateau. The source of the river is a few hundred metres from that of the River Bush, which flows north-east to meet the sea at Bushmills. Cushendun ("Bun Abhann Duinne", "foot of the River Dun" in Irish