Draft Environmental Impact Statement (DEIS)

The Mid-States Corridor Project examines an improved highway connection in southern Indiana. The Preferred Alternative identified in the Draft Environmental Impact Statement (DEIS) is Alternative P. Alternative P improvements extend 54 miles from I-64/US 231 to I-69 at the existing US 231 interchange.

Preferred Alternative P

  • Begins at I-64/US 231 interchange
  • Travels east of Huntingburg and Jasper
    • Avoids developed areas near those cities
  • Parallels existing US 231 alignment to the west
  • Includes western bypass of Loogootee
  • Avoids West Boggs Lake to the east
  • Crosses back west of existing US 231
  • Continues north
  • Ends at I-69 interchange at US 231
  • Includes 9 local improvements along existing US 231

Watch this overview to learn more about the DEIS, the Preferred Alternative and next steps.

Among Alternatives adequately addressing Purpose and Need (Alternatives P, M and O), Alternative P has the lowest impacts to environmental resources, the lowest cost among the three alternatives and comparably low level of impacts to several key resources with the smallest impacts to wetlandsand no impacts to karst features.

The Purpose of the Mid-States Corridor project is to provide an improved transportation link between the US 231/SR 66 intersection and I-69 (either directly or via SR 37) which:

  • Improves business and personal regional connectivity in Dubois County and Southern Indiana.
  • Improves highway connections to existing major multi-modal locations from Southern Indiana.

The DEIS is a detailed document that summarizes the Mid-States Corridor project’s study process, analysis and findings. It assesses the benefits, impacts and costs of the alternatives. It includes the basis for the selection of the preferred alternative and key commitments associated with the project.

Maps and Materials

Large Aerial Map 1

I-64 to SR 56

Large Aerial Map 2

SR 56 to I-69

Comment Period

The formal comment period For the Mid-States Corridor Tier 1 Draft Environmental Impact Statement has closed. There were several ways to provide comments during the formal comment period. All comments are considered equally, regardless of comment channel. Responses to comments are included in the Final Environmental Impact Statement (FEIS).

Draft Environmental Impact Statement (DEIS)

The Federal Register Notice for the DEIS was published April 15, 2022.

Environmental Impact Statement

Cover Page
Signature Page
EIS Summary


A – Transportation Performance Measures Analysis
B – Economic Development Performance Measures Analysis
C – Preliminary Alternatives Development
D – Screening of Alternatives Report
E – Working Alignment Typical Sections and Cost Estimating
F – Cumulative Impacts Baseline Trends
G – Cumulative Impacts Analysis Technical Report
H – Forest Impact Analysis
I – Threatened and Endangered Species Surveys
J – Floodplain Impact Analysis
K – Wetland Impact Analysis
L – Stream Impact Analysis
M – Groundwater Impact Analysis
N – Archaeology Analysis
O – Historic Properties Analysis
P – Section 106 Documentation
Q – Direct and Indirect Impacts to Farmland, Forests and Wetlands
R – Section 303(d) List – Impaired Waterbodies
S – Properties of Environmental Concern
T – Travel Forecasting Model Documentation
U – Land Use Plan Analysis
V – Local Improvements Analysis
W – Title VI/Environmental Justice Analysis
X – Geographic Information System Technical Documentation
Y – Karst Impact Analysis
Z – Agency Meetings and Correspondence
AA – Stakeholder Meetings and Correspondence
BB – Public Meetings and Correspondence
CC – Purpose and Need Appendix
DD – Social Impacts Appendix
EE – Economic Impacts Appendix (formerly Appendix U)
FF – Agricultural Impacts Appendix
GG – Managed Land Impacts
HH – Ecosystem Impacts Appendix
II – Media Outreach Appendix
JJ – Noise Analysis Appendix
KK – Section 4(f) Appendix
LL – Mineral Resources Appendix
MM – Wild and Scenic Rivers Appendix
Volume III – Environmental Atlas Part 1
Volume III – Environmental Atlas Part 2
Volume III – Environmental Atlas Part 3