Great Lakes vs Mississippi Usefullness

[kalos72]

So I am sure most of us have thought that the Ole Miss will be a great resource to repair/control during the rebuilding process. But what about the Great Lakes, and more importantly I think, the Saint Lawrence River access to the Atlantic.

I am thinking about the value of setting up a team on the Great Lakes to gain control of the Lakes and start to use it to transport people/materials throughout.

What kind of "Navy" would you need to control the waterways? A Brown Water Navy style?

Would Canada take issue?