canals and locks. don't pay attention to the one that says locks and docks they were just trying to ryme their answer.
no it is a series of locks ,channels,and canals
Locks
Locks
A.) Chesapeake Bay Seaway B.) American-Canadian Seaway C.) Great Lakes-St. Lawrence Seaway D.) St. Lawrence River Locks
Atlantic Ocean
Locks exist on the St. Lawrence river because you need leveled water to sail or barge.
The St. Lawrence Seaway.
The Great Lakes are substantially above sea level.
Lock exist because you need leveled water to be able to sail or barge from place to place.
It is the Great St Lawrence seaway...
st. Lawrence seaway st. Lawrence seaway