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
Course of the Klamath River through its narrow canyon, the river receives Beaver Creek from the right, from the mouth, as it passes the small hamlet of Klamath River from the south. It then turns west, and with the massive bulk of Dry Lake Mountain looming to the north, the river receives Horse Creek from the right after passing the town of the same name. It then turns south and then west, whipsawing through an increasingly narrow gorge, and receives the Scott River from the left and passes Hamburg, from the mouth. The river then passes Seiad Valley and receives Seiad Creek from the right