33 CFR 100.917 - The Old Club Cannonade, Harsens Island, MI.
(a)Regulated Area. A regulated area is established to include all waters of Lake St. Clair in an area bound by the coordinates starting at the cannon firing position located at 42°32.5′ N; 082°40.1′ W extending west to the Old Channel Light located at position 42°32.5′ N; 082°41.6′ W angling northeast to position 42°33.5′ N; 082°40.6′ W then angling southeast to the point of origin creating a triangle shaped safety zone. (NAD 83). This area is near the southern end of Harsens Island in Muscamoot Bay.
(c)Enforcement Period: The third week in October. The exact dates and times for this event will be determined annually.