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
Seine River Steamers hospital ships during the First World War, as the ghastily wounded British soldiers could be smoothly moved downriver to larger hospital ships at Le Havre. Atlantic Salmon have naturally returned to the Seine almost a century after over fishing and pollution caused them to disappear. Seine River Steamers The Seine River was the scene of many early experiments with steam navigation. The steamship has a long ancestry, dating back at least to 1783 when the Marquis de Jouffray d'Abbans steamed his little boat, the Pyroscaphe, across the Seine. Robert Fulton even exhibited one to Napoleon's regime. With the success of