70 Gros Cap Reef (ON 86) latitude 46° 30' 43.7" N longitude 84° 36' 55" W September 7, 2009 The lighthouse is mounted on a unique concrete crib that has a knife-edge similar to a ship's prow pointed northwest, this design splits ice floes in the winter. Located on the southwest edge of the reef guarding the entrance to the river from Lake Superior. ARLHS # CAN-565
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