
At the confluence of the stream of Plessis and Blavet, between the municipalities of Lanester and Locmiquélic, the banks of the Blavet are more than 500 meters apart. This coastal river joins the Scorff and flows into the Atlantic Ocean at the level of the Bay of Lorient. Until 1909, Lanester was part of the municipality of Caudan. This area, once populated by a few villages made up of farms, has become highly urbanized. Here, on the Lanester side, industrial and military shipbuilding activities are concentrated.