Calumet River

The Calumet River is a system of heavily industrialized rivers and canals in the region between the south side of Chicago, Illinois, and the city of Gary, Indiana. Historically, the Little Calumet River and the Grand Calumet River were one, the former flowing west from Indiana into Illinois, then turning back east to its mouth at Lake Michigan at Marquette Park in Gary. Now the system is part of the Chicago Area Waterway System and through the use of locks flows away from Lake Michigan to the Cal-Sag Channel.

Calumet River
The Calumet River, with the Chicago Skyway traversing it
Physical characteristics
Source 
  locationConfluence of the Little Calumet and the Grand Calumet, Chicago
  coordinates41°38′38″N 87°33′39″W
  elevation581 ft (177 m)
Mouth 
  location
Confluence with Lake Michigan, Chicago
  coordinates
41°43′58″N 87°31′46″W
  elevation
574 ft (175 m)
Basin features
ProgressionCalumet River → Lake Michigan → Great Lakes → Saint Lawrence Seaway → Gulf of Saint Lawrence
GNIS ID405379
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