Seine Commercial craft (barges and push-tows) can use the river from Marcilly-sur-Seine, to its mouth. At Paris, there are 37 bridges. The river is only above sea level from its mouth, making it slow flowing and thus easily navigable. The Seine Maritime, from the English Channel at Le Havre to Rouen, is the only portion of the Seine used by ocean-going craft. The tidal section of the Seine Maritime is followed by a canalized section ("Basse Seine") with four large multiple locks until the mouth of the Oise at Conflans-Sainte-Honorine (170 km). Smaller locks at Bougival and at Suresnes lift the
Source-Seine Source-Seine Source-Seine is a commune in the Côte-d'Or department in eastern France. It was formed on 1 January 2009 when Saint-Germain-Source-Seine was merged with Blessey. Source-Seine is located northwest of Dijon. True to its name, within Source-Seine is the source of the Seine, in woods off the D103 road approximately 2 km Southeast by east of the cluster of buildings in Saint-Germaine, or 3 km East by south of the cluster of buildings in Blessey. The Seine rises at an elevation of in this wooded area, from waters in several closely clustered ditches/depressions. France's second-longest river (after the Loire), the