St. Lawrence Waterways - VN200

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The above map depicts the St. Lawrence River waterways between Montréal at 45 ° 30'N 73 ° 35'W and îles aux Coudres at 47 ° 25'N 70 ° 25'W. Each area maintained for the commercial channel is represented by a different color depending on its depth maintained. The depths of the areas maintained are; 12.5m, 11.3m, 10.7m and 11,0m. Naturel deep water channel are also represented on this map.