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, Michigan Street in Sault Ste. Marie, Ontario. Shipping traffic in the Great Lakes system bypasses the rapids via the American Soo Locks, the world's busiest canal in terms of tonnage passing through it. Smaller recreational and tour boats use the Canadian Sault Ste. Marie Canal. The city's downtown was developed on an island, with the locks to the north and the Sault Ste. Marie Power Canal to the south. The largest ships are long by wide. These are domestic carriers (called "lakers"). Too large to transit the Welland Canal that bypasses Niagara Falls, they are land-locked. Foreign ships (termed "salties") are