The U.S. Army Corps of Engineers is reviewing the entire navigational
system in the Great Lakes. The study could result in changes to ports
and harbors throughout the region. It could also give the go-ahead for
deepening shipping channels and widening locks on the St. Lawrence
Seaway. As the Great Lakes Radio Consortium’s David Sommerstein
reports, environmentalists are warning such projects could pose a threat
to the delicate marine ecosystem: