Illinois Tollway HED

Federally endangered Hines Emerald Dragonfly (HED) requires rare habitat of calcareous spring-fed marshes overlaying dolomite bedrock. When Illinois Tollway constructed the I-355 south extension, the project impacted HED habitat along the Des Plaines River.

To mitigate the loss, the Tollway restored HED habitat in nearby forest preserves of the Chicago metro region.

AES, partnered with Huff & Huff, worked closely with agencies, forest preserve districts, and stakeholders to implement the restoration plan for wetland habitat creation and maintenance.

To improve HED habitat, AES field crews controlled invasive species through herbicide applications, brush removal, prescribed burning and mowing. AES also installed native seed to create additional HED habitat in adjacent wetlands.

Timing of restoration activities and working in a sensitive, low impact fashion were important to protecting the existing HED population while improving habitat. The project resulted in an increase of the HED population.

  • Wetland Restoration + Creation
  • Ecological Restoration
  • Natural Area Maintenance
  • Native Seeding + Planting
  • Invasive Species Management
  • Agency Coordination
  • Threatened + Endangered Species

Illinois Tollway Endangered Species Habitat Restoration
Cook, Will and DuPage Counties, Illinois
100 acres
2008-2015


appliedecoIllinois Tollway HED