Illinois and Michigan Canal completed (1848)

The Illinois and Michigan Canal, completed in 1848, connected the Great Lakes to the Mississippi River. Running 96 miles from Chicago to LaSalle-Peru, it crossed the Chicago Portage, establishing Chicago as a key transportation hub before the railroad era. The canal's completion aligned Illinois with free states and facilitated trade ties with the Northeast.

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Background and detail

Geography and Route. The canal connected the Mississippi Basin to the Great Lakes Basin. In Illinois, it ran 96 miles from the Chicago River in Bridgeport, Chicago, to the Illinois River at LaSalle-Peru. It crossed the Chicago Portage, a critical geographic feature that facilitated the connection between the two major water systems.

Economic and Political Impact. The canal helped establish Chicago as the transportation hub of the United States before the railroad era. It cemented cultural and trade ties to the Northeast rather than the South. Politically, the canal's potential alignment with free states influenced Congress to grant Illinois statehood, despite population requirements not being met.

Completion and Cost. The canal was finished in 1848 at a cost of $6,170,226. Its function was partially replaced by the wider and deeper Chicago Sanitary and Ship Canal in 1900, and it ceased transportation operations with the completion of the Illinois Waterway in 1933.

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