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
Mouth of the Cirque de Salazie Important Bird Area harriers, Mascarene swiftlets, Mascarene paradise flycatchers, Réunion bulbuls, Mascarene white-eyes, Réunion olive white-eyes and Réunion stonechats. Mouth of the Cirque de Salazie Important Bird Area It lies north-east of the Piton des Neiges volcanic massif, consisting of the river gorges of the Bras de Caverne and Rivière du Mât that drain the forested Bélouve plateau and adjacent Salazie caldera respectively. The site contains stands of native forest in very rugged terrain at elevations ranging from 160 m up to 1430 m above sea level. The site has been identified by BirdLife International as an Important Bird Area (IBA) because it