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Lake Superior is the largest freshwater lake in the world by area and the third largest in volume, behind Lake Baikal in Siberia and Lake Tanganyika in East Africa. The Caspian Sea, while larger than Lake Superior in both surface area and volume, is brackish. Lake Superior's deepest point [4] on the bathymetric map. [1]
Subregion Map 0401 Western Lake Superior Subregion: The drainage into Lake Superior within the United States from the Ontario-Minnesota international boundary to and including the Montreal River Basin. Michigan, Minnesota, and Wisconsin. 9,240 sq mi (23,900 km 2) HUC0401: 0402 Southern Lake Superior–Lake Superior Subregion
The Great Lakes Basin consists of the Great Lakes and the surrounding lands of the states of Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, and Wisconsin in the United States, and the province of Ontario in Canada, whose direct surface runoff and watersheds form a large drainage basin that feeds into the lakes.
The area of some lakes fluctuates substantially. For those lakes partially in Canada or Mexico the area given for the lake is the total area, not just the part of the lake in the United States. Of the top 100 lakes, 55 are man-made and 45 are natural. Two lakes in the top 100 are primarily salt water, and two are primarily brackish water.
Watersheds of North America are large drainage basins which drain to separate oceans, seas, gulfs, or endorheic basins. There are six generally recognized hydro-logical continental divides which divide the continent into seven principal drainage basins spanning three oceans ( Arctic , Atlantic and Pacific ) and one endorheic basin.
The waterway allows passage from the Atlantic Ocean to the inland port of Duluth on Lake Superior, a distance of 2,340 miles (3,770 km) and to Chicago, on Lake Michigan, at 2,250 miles (3,620 km). [3] The elevation change from Lake Superior to sea level is 601 feet (183 m).
The Lake Superior shipwreck coast from Grand Marais, Michigan, to Whitefish Point became known as the "Graveyard of the Great Lakes". More vessels have been lost in the Whitefish Point area than any other part of Lake Superior. [117] The Whitefish Point Underwater Preserve serves as an underwater museum to protect the many shipwrecks in this area.
The Saint Louis River (abbreviated St. Louis River) is a river in the U.S. states of Minnesota and Wisconsin that flows into Lake Superior. The largest U.S. river to flow into the lake, it is 192 miles (309 km) in length [1] and starts 13 miles (21 km) east of Hoyt Lakes, Minnesota. The river's watershed covers 3,634 square miles (9,410 km 2).