Encyclopedia ofChicago
MAPS : MAPS CREATED BY ENCYCLOPEDIA STAFF
MAPS : MAPS CREATED BY ENCYCLOPEDIA STAFF
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Chicago's Deep Tunnel System in 2003

 

 

 

Chicago's Deep Tunnel System in 2003

The Deep Tunnel System was created to ameliorate the sewer and pollution problems of storm runoff events. Most of it has been built under existing waterways where storm sewers and other runoff sources already converge, resulting in a discontinuous network as a whole. Such waterway locations, publicly owned, also simplified construction. The system is designed to collect excess stormwater into reservoirs for later treatment and gradual release.