It would flow in two directions. On the lake side it would flow to the lake, and on the river side it would flow to the river.
Basically what it would do is stop the invasive species, including the carp, from getting up to Lake Michigan through the waterway, which is wide open right now. It's just totally open and the carp can go through there. But this has the advantage that it would stop everything else going to Lake Michigan, and everything going from Lake Michigan down to the Mississippi River watershed.
Probably the most notorious of the invasive species that have gone through the system is the zebra mussels, a species that is all the way out in California. The zebra mussels came right through downtown Chicago, which is how they got out there.
Again, 39 different species have been documented—29 in the Great Lakes and 10 in the Mississippi River—as essentially ready to go in one direction or another.
That's the beauty of going with the physical separation. I think there are a number of Canadian and U.S. scientists who really believe this is the only way you can really have a chance at stopping them. It doesn't reduce the risk to zero because you're always going to have—