I-39/90 Expansion Project

Illinois state line to Madison, Dane and Rock counties

I-43/WIS 81 interchange

I-43/WIS 81 interchange

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Environmental Assessment (EA)

An EA was produced for this project. The EA evaluated the purpose and need of the overall project, and the environmental impacts of a number of alternatives developed during the study.

EA signed January 20, 2015.

  • View EA Note: this file does not include exhibits. To view exhibits, see complete document below.
  • View EA (complete)
    Note: this file will take longer to download due to the large file size.

Finding of No Significant Impact (FONSI)

FONSI signed August 28, 2015.

  • View FONSI
    Note: this file does not include exhibits.