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 are cooler than nearby land areas. This tends to stabilize the atmosphere, suppressing precipitation (especially showers and thunderstorms) somewhat, in May, June and July. In autumn, the lakes are releasing their stored heat from the summer, making them warmer than the surrounding land, and increasingly frequent and strong polar and Arctic air outbreaks pick up warmth and moisture during their over-water passage, resulting in clouds and instability showers. In Sault Ste. Marie, this phenomenon peaks in September and October, making these the wettest months of the year. Also noteworthy is that in Sault Ste. Marie, the year's third wettest month,