The St. Marys River, Michigan is a Great Lakes connecting channel about 63 miles long, flowing southeasterly between the State of Michigan and Province of Ontario, Canada, from the eastern end of Lake Superior into northern end of Lake Huron. The project, which was authorized by numerous acts between 1870 and 1986, provides for maintenance of channels at 27.5-28.5 feet deep in the St. Marys River, and in the Lake Superior and Lake Huron approaches thereto; constructing and operating four locks and two canals; constructing a hydropower plant of 14,000 kilowatt capacity (45,000 kilowatt ultimate capacity); constructing anchorage areas in the river above and below locks; and constructing various other works in conjunction with the project. The project also is the site of a Class A Visitors Center and park handling nearly 500,000 visitors annually.