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–Nord Europe Canal authority, sets out the principal environmental impacts on the website dedicated to the project. The CO2 emissions of a barge carrying 1500 tonnes are three times less than those of the fleet of trucks required to move this load. A single push-tow 185 m long can carry 300 containers unloaded in a maritime port, compared to 5 fully loaded trains and 200 trucks. Seine–Nord Europe Canal The Seine–Nord Europe Canal is a projected high-capacity ("grand gabarit") canal in France that would link the Oise River at Compiègne with the Canal Dunkerque-Escaut, east of Arleux. The objective is to expand trade