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A Story
of the divide in Oak Park, Illinois, with the History
of the Chicago Portage and the Waterways
When we usually think of the
continental divide, we think of the
mountain-top spine which runs the length of the Rocky
Mountains. Every point of crossing is marked with a sign
announcing the divide, as if from here, all rivers flow
either west to the Pacific Ocean or east to the Atlantic
Ocean. |
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Drainage Basins of the United States |
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Village of Oak Park showing continental divide |
But the geography
is actually not quite that simple. In fact the United
States land area is divided into several distinct basins
flowing, respectively, into the Pacific, the Atlantic,
the Mississippi River into the Gulf of Mexico, Canada's
Hudson Bay, and of course the Great Lakes which drain
into the St. Lawrence River and hence into the Atlantic.The lines separating each of these great basins is a
continental divide and one of these continental divides runs right
through the middle of Oak Park. On the west side of our
divide, waters flow to the Des Plaines River in River
Forest, down to meet the Illinois River near Joliet, to
the Mississippi, and finally on to the Gulf of Mexico. On
the east, before the reversal of the Chicago River , the water would flow to the
Chicago River, into Lake Michigan and through the Great
Lakes -- Huron, Erie, over Niagara Falls into Lake
Ontario, and finally to the St Lawrence in Canada and
into the north Atlantic. |