The I-41 Project Environmental Assessment documented the following elements related to the project:
- The purpose and need for the proposed roadway improvements
- The alternatives WisDOT considered
- The environmental impacts of the alternatives retained for detailed study
- Public involvement and agency coordination efforts
WisDOT approved the environmental assessment, giving agencies and the public the opportunity to review the document and provide comments, including at the public hearings held in July 2021.
The Federal Highway Administration then issued a Finding of No Significant Impact or FONSI documenting the decision, concluding the environmental study process, and allowing the project to proceed to the design phase.