A system of levees were constructed along the East Branch of the DuPage River, between Middleton Avenue and Maple Avenue, and along St. Joseph Creek between the river and Route 53. The levees were built in the 1960s by the Illinois Department of Transportation. The levees provide protection from frequent flood events along the river. However, they do not provide protection from larger flood events or from locally heavy rains.
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DuPage County has recently teamed with the US Army Corps of Engineers and Will County to look at the levees as part of an overall look at flooding throughout the DuPage River basin. A draft report is scheduled for early 2017.

The Village of Lisle and DuPage County have completed storm sewer and pump station improvements to improve internal drainage during locally heavy rainfall.

In 2012, the Village completed the East Branch DuPage River Levee Study (see Quick Links). The study outlined over $9 million worth of improvements and repairs, including the removal of utility poles, stabilization of stream banks, removal of trees and encroaching structures, capping portions of the levee with clay, stabilizing the foundation with pressure injected grout and acquiring necessary easements for maintenance and improvements.

The Village and DuPage County will continue to look for funding opportunities to complete the required maintenance and levee repairs.