In 2016 archaeological excavations began by Annie Dumont in Sermesse. Underwater surveys have made it possible to discover the remains of a boat-mill which sank in the Doubs at the end of the 17th century. It consisted of two boat hulls (Image 2): the first the wider "Corte" and the second is the narrower "fairground".  

These boats as well as objects that belonged to the miller, rest at the bottom of the Doubs, 4 meters deep. Their stay lasted more than 300 years and kept a good state of conservation under water.  

The cause of the sinking, archaeologists have assumed that this event may have occurred from a relatively exceptional flood. It remains a hypothesis which is confronted by the position of the mill (Image 5).