The family had property on Lake Huron, near the top of the thumb back in the 1940’s to early 1950’s....every couple of years the shore line would be out 40 feet for the whole summer season, the following year it would be back to normal...happened twice that I can remember.. I don’t believe todays experts.
I think they were/are talking about selling Great Lakes water. I think it came down to...who has the authority?? Not sure where it stands.