Re: Disrupting the Natural Flow of Water / Drainage Law
contact the Mi DNR. Many actions that alter the natural flow of water must be approved by the DNR. There are horrific stories about people that spent thousands of dollars altering water flow only to be required to spend thousands more to reverse the damage to the natural flow.
If you cannot find any help there, you can sue the guy for damaging your land. Even if he has the right to alter the flow, he does not have the right to damage another's land in the process and would most likely be liable to you for the damages. Of course, that will cost some money to sue so I would go the DNR route first.
I am not an attorney and any advice is not to be construed as legal advice. You might even want to ignore my advice. Actually, there are plenty of real attorneys that you might want to ignore as well.