The Rio Magdelena flows north through Colombia to discharge into the Caribbean at Barranquilla. It is navigable for several hundred kilometers above that coastal city. Utilizing shallow draft push boats the Naviera Fluvial Colombiana SA has the capacity to move one million tonnes of oil per year in addition to 700,000 tonnes of general freight. Established in 1920 the firm operates a dozen river push-boats and 78 barges on Colombias inland waterways. Naviera is the only Colombian river transport company with its own shipyard.