The waterway allows passage from the Atlantic Ocean to the inland port of Duluth on Lake Superior, a distance of 2,340 miles (3,770 km) and to Chicago, on Lake Michigan, at 2,250 miles (3,620 km).
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Lawrence Seaway is a deep draft waterway extending 3,700 km (2,340 miles) from the Atlantic Ocean to the head of the Great Lakes, in the heart of North America.
It is estimated that there are nearly 1,500 shipwrecks in Lake Michigan, which in its deepest spot is nearly 1,000 feet deep. While the remains of numerous ships can be found along the shoreline, only about 300 wrecks beyond the surf line have been located.
Lake Superior is the world's largest freshwater lake by area (31,700 mi2 /82,100 km2). It is also the coldest and deepest of the Great Lakes, with a maximum depth of 406 meters (1,332 feet). By most measures, it is the healthiest of all the Great Lakes.
There is an abundance of life and different creatures you might find in Lake Michigan. Whales just aren't one of them. See all of the animals you can find in the lake here.
At the deepest measured point, Lake Superior is 1,332 feet, around a quarter-mile straight down. Again, comparing it to the next deepest point in another Great Lake, Lake Michigan comes in second with a depth of 925 feet.
True tides—changes in water level caused by the gravitational forces of the sun and moon—do occur in a semi-diurnal (twice daily) pattern on the Great Lakes. Studies indicate that the Great Lakes spring tide, the largest tides caused by the combined forces of the sun and moon, is less than five centimeters in height.
The primary reason for shipwrecks on the Great Lakes is stormy weather, specifically in the upper portions of Lake Michigan, Lake Huron and Lake Superior. In the late fall and early winter, weather can be particularly treacherous. Most Great Lakes shipwrecks occurred in the late fall.