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
John Johnston House (Sault Ste. Marie, Michigan) John Johnston was Justice of the Peace in Sault Ste Marie for many years. He remained in Sault Ste. Marie for the rest of his life, remaining in the fur trade. In 1812, Johnston helped British troops take control of Fort Mackinac on Mackinac Island. In 1814, American forces burned his house, as well as $40,000 of his goods, in retaliation. However, Johnston rebuilt, in part by selling his parent's estate in Ireland, and became connected with John Jacob Astor's American Fur Company. John Johnston died on September 22, 1828. In 1794, John Johnston constructed a house on this site.