The Port of Saint John is a port complex that occupies of land along of waterfront of the Saint John Harbour at the mouth of the Saint John River in the city of Saint John, New Brunswick, Canada. The Port of Saint John, with facilities on both sides of the river, is noted for its extreme tidal range and river currents. Because of the semi-diurnal tides and the river influence, slack water occurs at approximately half tide and not at high or low water as at most other ports. The port is administered by the Saint John Port Authority, a federal agency. Major products shipped through the port include oil, forest products and potash. Container traffic has been steadily increasing since 2016 with DP World becoming the port operator and Canadian Pacific regaining access to the port in 2020 through the purchase of Central Maine and Quebec Railway. The port of Saint John has three container lines servicing it those being MSC CMA CGM and Hapag-Lloyd. History The Port of Saint John lies within Mi'gma'gi, the Mikmaw Nation ancestral stewardship region and greater Wabanaki Confederacy ancestral governance area. The location was first visited by Samuel de Champlain on his voyage of discovery to the New World in 1604, who described the Saint John River as "one of the largest and deepest we had yet seen" and who was advised by his Mi'kmaq guides that the river provided a route to the Saint Lawrence River valley with only a short portage. Because of its strategic location, it became the site of a French stronghold known as Fort La Tour. Though the fort was sacked in 1645, the river remained an important trade route for French, English and First Nations traders throughout the 17th and 18th centuries. The port did not begin to develop in earnest until the influx of United Empire Loyalists in 1783. It developed rapidly as a result of timber trade and shipbuilding. Saint John became the province's leading industrial centre during the 19th century with much of the shipbuilding industry being concentrated on Courtney Bay outside the main harbour area. One of the best known ships built in Saint John was the Marco Polo (1851) which became renowned for its speed. The Great Famine of Ireland of 1845–1849 saw a large immigrant influx, and to handle the new arrivals, the government constructed a quarantine station and hospital on