Rule 2. The following described area is established as the Alger Great Lakes state bottomland preserve: That area of Lake Superior bottomlands, extending upward and including the surface of the water, within the longitudes 86°08'30" (AuSable Point) and 86°47'30" (AuTrain Point) and lying between the ordinary high shoreline and the 150-foot depth contour as intersected by said longitudes and based on the ordinary high-water level, including depressions in excess of 150 feet within the aforementioned area, Alger county, Michigan, which area contains 113 square miles, more or less.
Mich. Admin. Code R. 299.6002