Who or what controls the water in lake Michigan?

Question

Who or what controls the water in lake Michigan?

Answer 1

It's a dual responsibility. The Illinois State Department of Natural Resources implements regulations regarding use and controls on the US side. Due to the presence of ships locks,the level of all of the great lakes are linked in terms of their linked management. Each side is responsible for limiting contamination, flooding and allocations of use. http://www.ilga.gov/legislation/ilcs/ilc...

Answer 2

I'd assume there is a treaty of some sort between the two countries.