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
Eu, Seine-Maritime Eu, Seine-Maritime Eu () is a commune in the Seine-Maritime department in the Normandy region in northern France. Eu is located near the coast in the eastern part of the department, near the border with Picardy. Its inhabitants are known in French as the "Eudois". Eu is situated at the junction of the RD 1015, the RD 925, the RD 940 and the RD 1314 roads, in the steep-sided valley of the Bresle River, whose mouth is away to the north in Le Tréport. The name of the commune is related to that of the river on which it stands.