Chicago River Flow – then and now

The Chicago and Calumet rivers were once tiny waterways that trickled into Lake Michigan. Beginning in 1900 the city dug a seriers of canals the reversed their flows so they could carry the city’s waste into the Mississippi River basin, and away from the lake – the city’s drinking water source. A push is now under way to engineer a system to re-establish the natural hydrological divide between Lake Michigan and the Mississippi.

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