The Blavet

With its 163 kilometres of river, the Blavet rises in Bourbriac in the Côtes-d’Armor department. It flows to Guerlédan where a hydroelectric dam built in 1930, forms a lake of 304 hectares. From the 19th century, the river was channelled and the part as far as Pontivy served as a section of the Nantes-Brest canal. As far as the gates of Hennebont, bridges and locks were built, and a tow path used to pull goods barges.