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DuPage River Feasibility Study

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AUTHORITY: Section 206, Flood Control Act of 1958


The DuPage River and tributaries drain approximately 353 square miles in suburban Cook, DuPage and Will Counties in Metropolitan Chicago. The study area has experienced rapid development over the past two decades, and currently includes 40 communities affecting approximately 4,300,000 people. Major storm events occurred in the basin in 1996, 2008, 2009, and most recently in April 2013, resulting in significant overbank flooding in over 20 communities and significant damage to residential and non-residential structures and critical infrastructure and the closure of two major interstate highways (I-80 and I-55) for several days. Average annual flood damages are currently estimated at $30 million.


On July 14, 2015 the U.S. Army Corps of Engineers, Chicago District, signed a Feasibility Cost Share Agreement (FCSA) with the DuPage County Stormwater Management Commission and Will County Executive Office for a study of flooding issues along the DuPage River. The signing of the FCSA triggers the start of a feasibility study that will investigate flood risks within the DuPage River watershed in northeastern Illinois and identify potential solutions to mitigate those risks.



Total Study Cost: $3,000,000

Federal Feasibility Cost: $1,500,000

Non-Federal Feasibility Cost: $1,500,000


The new study will address impacts of flooding to structures, infrastructure and the transportation system. In addition, there is a high level of concern regarding the health and safety of residents due to impacts on water and sewage systems from the high river and groundwater levels. Impacts of groundwater and riverine flooding to this critical infrastructure will be evaluated to minimize risks to residents’ health and safety.

NON-FEDERAL SPONSORS: DuPage County and Will County

Project Manager

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Imad Samara