Lake Huron is the second largest of the Great Lakes. Three large bays extend from the main body
of the lake, Saginaw Bay of the West side and North Channel and Georgian Bay on
the northeast side. The lake receives
the waters of Lake Michigan through the Straits of Mackinac and those of Lake
Superior from the St.
Marys River. The lake discharges at
its south end into the St.
Clair River at Fort Gratiot. The
lake is a connective link in the Great Lakes chain. The depth of water in the St.
Marys River, St. Clair River, and Detroit
River governs the draft of vessels navigating Lake Huron to and from Lake
Superior and Lake Erie.
The Great Lakes Towing Company provides tug service to Lake
Huron ports, including Saginaw and Calcite, with tugs from Detroit or Sault Ste. Marie.