1964 Map of Burnt Island

About this map

The complex archipelago of Potagannissing Bay is the central focus of this mid-1960s maritime survey, illustrating the intricate coastline of Drummond Twp and the international boundary separating Michigan from Ontario. The map details a dense cluster of islands including Burnt Island, Macomb Island, and Wilson Island, which define the northern approach to the Saint Marys River via De Tour Passage. On the larger landmass of Drummond Island, the vast Munuscong State Forest covers the interior, while evidence of local industry appears at the Quarry near the shoreline of the Harbor Island group. The map’s depth soundings and reef markers like Burnt Island Reef highlight the navigational hazards of these waters during a period when the Great Lakes shipping routes remained vital to the regional economy.