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The County of DuPage
Wheaton, Illinois
 

Warrenville Grove Dam Modification

The Warrenville Grove Dam Modification project is a priority within the DuPage County West Branch DuPage River Watershed. Modification/removal of the Warrenville Grove Dam is a key component in improving the water resources of the West Branch DuPage River watershed.

he purpose of this project is to restore the ecological health of an impounded segment of the West Branch DuPage River extending the length of Warrenville Grove Forest Preserve. Through the notched removal and modification of the existing dam and re-creation of upstream and downstream channel conditions, this project seeks to:

  • Restore the natural ecological functions and processes of a free- flowing river segment
  • Decrease lake-like conditions upstream of the dam that support high algal biomass, high water temperatures, and substandard dissolved oxygen levels, considered a non-pollutant impairment by Illinois Environmental Protection Agency (IEPA)
  • Decrease barriers to fish movement and mussel dispersion
  • Decrease liability exposure and maintenance of the dam
  • Provide improved educational and recreational opportunities for the community

Warrenville Mill Race Concept Plan

Warrenville Mill Race Concept

Rendering of River Post Dam Modification

Rendering of River Post Dam Modification

Existing Warrenville Grove Dam

Existing Warrenville Grove Dam

Mill Race at Warrenville Grove Dam

Mill Race at Warrenville Grove Dam


Letter of Support for Dam Modification from Governor Quinn (then Lieutenant Governor) (PDF)