River Somme
The French natural and man-made waterways network is the largest in Europe extending to over of which VNF manages the navigable sections. The assets managed by VNF comprise of waterways, made up of of canals and of navigable rivers, 494 dams, 1595 locks, 74 aqueducts, 65 reservoirs, 35 tunnels and a land area of . Two significant waterways which are not under VNF's control are the navigable sections of the River Somme and the Brittany Canals, which are both under local management, and neither is the River Lot in Aquitaine.