Illiana Expressway Environmental Impact Statements

Roadside pollinator plants and flowers

Cardno’s environmental team performed a range of services related to both tiers of the Environmental Impact Statement process for a proposed new expressway in Indiana and Illinois.

The Indiana Department of Transportation and Illinois Department of Transportation conducted National Environmental Policy Act (NEPA) Tier 1 and Tier 2 EIS processes to explore the feasibility of creating a new expressway between I-55 in Illinois and I-65 in Indiana.

During the Tier 1 Environmental Impact Statement (EIS) process, Cardno participated as a subcontractor in project scoping, public involvement, and completed portions of the “red flag” analysis.

Cardno also performed additional subcontracted work, including analyzing existing conditions and assessing potential impacts to natural resources, cultural resources, and human resources from the study alternatives.

Cardno also performed additional subcontracted work, including analyzing existing conditions and assessing potential impacts to natural resources, cultural resources, and human resources from the study alternatives.

During the Tier 2 EIS process, Cardno completed all natural and cultural resource studies, including wetland delineations and surveys in Indiana for:

  • endangered, threatened, and rare species,
  • bat habitat,
  • herptiles,
  • birds,
  • land cover,
  • vegetation, and
  • cultural resources.

Cardno also completed resource studies for alternative assessment, riparian surveys, alternatives analysis, and wetland mitigation studies in additional areas.