Lake St Clair, North America

Lake St. Clair is not one of the Great Lakes but it (along with the Detroit River) separates Lake Erie and Lake Huron. It is a very shallow lake with an average depth of about 10 feet (3 metres), and a maximum natural depth of 21 feet (6.4 metres), although it is 27 feet (8.2 metres) deep in the navigation channel which has been dredged for freighter passage. The Thames River flows westward through southwestern Ontario into the lake.