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 Sault Ste. Marie Canal, which was completed in 1895. Sault Ste. Marie, Ontario was incorporated as a town in 1887 and a city in 1912. The town gained brief international notoriety in 1911 in the trial of Angelina Napolitano, the first person in Canada to use the battered woman defence for murder. During World War II, and particularly after the US was attacked at Pearl Harbor in 1941, government concern turned to protection of the locks and shipping channel at Sault Ste. Marie. A substantial military presence was established to protect the locks from a possible attack by Nazi German