Soo Locks

Iron ore-carrying vessels don't do rapids, particularly when heading upstream. To get around them, structures called "locks" are built — sort of stairs for boats. Vessels float into one end, entry gates are closed and the level of water inside the lock is raised or lowered to match the level outside the gates at the other end.

The U.S. Army Corps of Engineers (USACE), Detroit District, announced that the New Lock at the Soo project is on schedule as construction for phase one of the project is under way. Trade West Construction Inc. began to move equipment to the site on May 4 and will begin deepening the upstream approach to the locks in the north canal.

SAULT STE. MARIE, Mich. (AP) The Great Lakes navigational locks at Sault Ste. Marie closed for the winter season Jan. 15, enabling the U.S. Army Corps of Engineers to handle a variety of maintenance projects. The Soo Locks are located on the St. Marys River, which links Lakes Huron and Superior.

MINNEAPOLIS (AP) Officials from Great Lakes states are making a renewed push to win approval of a long stalled proposal for adding a new lock to the Soo Locks complex, a critical chokepoint that connects Lake Superior to the lower Great Lakes. Only one of the two working locks there handles large iron ore boats.