Corps of Engineers releases DuPage River, Illinois Feasibility Report, Integrated Environmental Assessment for public comment

Published May 2, 2019

The U.S. Army Corps of Engineers, Chicago District released for public comment today the DuPage River, Illinois Feasibility Report and Integrated Environmental Assessment. The report provides a Recommended Plan to reduce flood risk in DuPage and Will counties in Illinois.

The study was completed in partnership with the DuPage County Stormwater Management and the Will County Executive Office. The report is available online at

The DuPage River study area has experienced rapid development over the past several decades and currently includes 40 communities and approximately 900,000 residents at risk of flooding. Major storm events resulting in overbank flooding occurred in 1996, 2008, 2010, and most recently in April 2013. In coordination with the local sponsors and stakeholders, the U.S. Army Corps of Engineers formulated and evaluated a series of plans to reduce flood risk to communities along the DuPage River and its major tributaries. The Recommended Plan includes the repair and elevation of the Lisle Levee and construction of a Lacey Creek Restriction in DuPage County, as well as the implementation of nonstructural risk reduction measures at 38 individual structures within both counties across the watershed.

This is a secondary public comment period of the updated report with an updated recommended plan. An initial review of the “Tentatively Selected Plan” was conducted from Aug. 1, 2018 through Sept. 22, 2018. At that time, the TSP consisted of the Lisle Levee and nonstructural measures across the watershed.  Following public, state and agency, and USACE and independent review of the TSP, more detailed engineering and economic analysis was completed to refine the recommendations for this study. Based on completion of this more detailed analysis, the refined results indicated that the Lacey Creek Restriction was economically justified and supportable, and therefore it was determined that the Lacey Creek Restriction could be included in the Recommended Plan. Due to the addition of this feature in the recommendation, USACE determined that conducting a second review period was warranted.

The Army Corps of Engineers is accepting comments on the report for 15 days from May 2, 2019, through May 17, 2019. Comments may be submitted by e-mail to or mailed to: U.S. Army Corps of Engineers, Chicago District, 231 S. LaSalle Street, Ste. 1500, Chicago, IL 60604, ATTN: DuPage River. Mailed comments must be postmarked by May 17, 2019.

Release no. 19-004