Afon Tryweryn

Afon Tryweryn is a river in the north of Wales which starts at Llyn Tryweryn in the Snowdonia National Park and after 19 kilometres (12 mi) joins the river Dee at Bala. One of the main tributaries of the Dee, it was dammed in 1965 to form Llyn Celyn. The Tryweryn flooding forcibly removed residents of the village of Capel Celyn despite popular and political opposition in Wales. The resulting graffiti "Cofiwch Dryweryn" ('remember Tryweryn') near Llanrhystud became an icon of Welsh feeling. Water is stored in Llyn Celyn in winter when flows are high, and released over the summer to maintain the flow in the Dee (water from the Dee is used as the water supply for large areas of north-east Wales, and for the Wirral and much of Liverpool in England).

Flows through: United Kingdom.

River data from Wikidata (CC0); lengths normalised to a common unit.