9.The Saint Lawrence River
Depth: 65 meters or 213 ft
The Saint Lawrence River, the number 9 on our list of deepest rivers in the world covers a basin area of 1,344,200 square km including Canada and the US. The river starts at the end lake of Ontario and then flows to the Atlantic Ocean. According to The Canadian Encyclopedia, this river was the main artery for timber trade in the 19th century. With the development of the Saint Lawrence Seaway, great parts of Canada and the US are linked with the rest of the world.
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