The crew of the Coast Guard Guard Cutter Hollyhock, homeported in Port Huron, Mich., transits Lake St. Clair en route to the western basin of Lake Erie for ice-breaking operations, Jan. 13, 2015. U.S. and Canadian Coast Guard ice breakers, as part of Operations Coal Shovel and Taconite, have been working tirelessly to keep vessel traffic and important economic supplies moving throughout the Great Lakes.