It's that time of year.The US Coast Guard announced it has commenced icebreaking operations in response to expanded ice growth in the commercial ports of western Lake Superior.Operation Taconite, launched by Coast Guard Sector Sault Sainte Marie on Wednesday, is one of two icebreaking operations that support the Great Lakes. It encompasses Lake Superior, St. Marys River, Straits of Mackinac, Georgian Bay, Green Bay, northern Lake Huron, and Lake Michigan.The authority for Coast Guard domestic icebreaking was created in 1936, by Executive Order 7521 signed by President Franklin D.