Welcome to the SDDOT I-90 Environmental Assessment (Exit 40 to Exit 51) Project Website

Announcement - EA Document Released

Announcement - Public Meeting on August 12 2008

Announcement - July 2008 Newsletter


Environmental Assessment (EA)

Public Meeting
August 12, 2008
Join us at the I-90 EA Public Meeting on August 12, 2008
view announcement

30-Day Public Review & Comment Period:

Submit your comment at the August 12, 2008 Public Meeting, on the website (Comment Form), or mail to the address below.

Terry Keller
SDDOT
700 East Broadway
Pierre, SD 57501
Fax: (605) 773-6608

Comments must be received by August 25, 2008.

The Environmental Assessment (EA) that has been approved for public review and comment is available for viewing by chapter. Click on any one of the links below to

Download Adobe Reader to view the I-90 Environmental Assessment (EA)

view each chapter or section.

I-90 Corridor Environmental Assessment (EA) Document Cover

Introduction and Table of Contents

Chapter 1: Purpose and Need

Chapter 2: Alternatives

Chapter 3 Environmental Consequences

Chapter 4 Cumulative Impacts

Chapter 5 Coordination

Chapter 6 Mitigation Summarization

Chapter 7 References

Appendix A Agency Correspondence

Appendix B Traffic Noise Analysis and Mitigation Report

Appendix C Preliminary Wetland Findings

Conceptual Right-of-Way Drawings

Bound hardcopies of the EA document are available at the locations shown below, by contacting Terry Keller of the South Dakota Department of Transportation at Terry.Keller@state.sd.us, or by calling him at (605) 773-3721.

  • SDDOT Region Office in Rapid City
    2300 Eglin Street, Rapid City

  • SDDOT Environmental Office in Pierre
    700 E. Broadway Ave., Pierre

  • Rapid City MPO Office (at City/School Administration Center)
    300 6th St. Rapid City

  • Sturgis Public Library
    1040 2nd St. Ste. 101, Sturgis

  • Meade County Courthouse
    1425 Sherman St., Sturgis

  • Summerset City Hall
    7055 Leisure Lane, Ste. B, Summerset

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