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
La Rochette, Seine-et-Marne La Rochette, Seine-et-Marne La Rochette is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France. It a small, particularly affluent community bordering the Seine river to the east and the historical Fontainebleau forest to the south which houses the world-renowned Chateau de Fontainebleau. The oldest documentation known concerning La Rochette dates back to the year 1047. The commune houses many villas along the Seine river as well as many estates and points of interest. In the centre of the village the Maison Raulin (former estate of Gustave Raulin - Architect for the City of Paris) stands