Detailed, simplified map of the Soo Locks and surrounding area

This is a simplified but detailed sketch or map of the Soo Locks. These locks allow access to the minor or lower Great Lakes from Lake Superior. Thus, for example, large freighters filled with iron ore, coal, and other minerals used in manufacturing steel may be transported from the iron and coal mines ringing the Lake Superior through the Soo Locks, to the manufacturing cities surrounding the minor or or lower lakes beginning with Lake Huron and on through other lakes over the Saint Lawrence River east to the Atlantic Ocean.