https://www.history.uscg.mil/Browse-by-Topic/Assets/Land/Stations-Units/Article/2650487/station-grindstone-city-michigan/
Station Grindstone City, Michigan United States Coast Guard Stations & Units
Station Grindstone City, Michigan Location: About 2 miles northeast of Port Austin, and about 2 miles southeast of Port Austin Reef Light; Lake Huron Date of...
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