
Aside from the Blavet, which criss-crosses the parish for almost 14 kilometres, Hennebont's river network is modest, with 7.3 km of permanent waterways and 16.4 km of intermittent waterways. After crossing and passing along Saint-Caradec stream, you cross the Hingair stream, fed by several springs. At its mouth, this modest stream powered a cereal mill owned by the Abbaye de la Joye around the year 1500. Sold as national property in 1791, it ceased to operate around 1850 before it was destroyed.