St. Marys River (Michigan–Ontario) arch bridge, takes road traffic across the river. Directly to the west is the Sault Ste. Marie International Railroad Bridge, which carries rail traffic on a single set of tracks. The Edison Sault Electric Hydroelectric Plant, located at the eastern end of the Sault Ste. Marie Power Canal which runs between Lake Superior and Lake Huron through the city south of the American locks, is one of the longest hydroelectric plants in the world at in length. The plant consists of 74 three-phase generators capable of generating 25 to 30 megawatts. It was completed in 1902. The hydro plant is
Sault Ste. Marie, Ontario was named HMCS "Sault Ste. Marie" (J334) after the city. It was laid down in 1942 and acted as a convoy in the Battle of the Atlantic. On January 29, 1990, Sault Ste. Marie became a flashpoint in the Meech Lake Accord constitutional debate when council passed a resolution declaring English as the city's official language and the sole language for provision of municipal services. The city had a sizable French-speaking population and these residents objected strongly to the council's action. The Sault Ste. Marie language resolution was not the first of its kind in Ontario, but the municipality was