Lake Michigan and Lake Huron are sometimes considered to be a single lake, Lake Michigan-Huron because they behave hydraulically as a single body of water due to their substantial connection at the Straits of Mackinac.
Lake Michigan and Lake Huron are sometimes considered to be a single lake-Huron because they behave hydraulically as a single body of water due to their substantial connection at the Straits of Mackinac. A single lake is Lake Michigan.