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 (Ontario) Mercutio River, tumbles over the Islands Falls, reaches Bradshaw Lake and flows into the Marmion Lake and reservoir, where it takes in four right tributaries. According to Barnes, the Upper Seine River was a "prime gold area." Key mines included the Harold Lake Mine (1894-1896), the Hammond Reef Mine (1894-1922), and the Sawbill Mine (1897-1899). Below Steeprock Lake, the river takes in the major left tributary Atikokan River and the minor left tributary Caribus Creek, then takes in the outflow from the Seine River Diversion on the right. It flows west over the Boyce Rapids, takes in the right tributary