Public Input
Interchange Project

Welcome to the I-29 Exit 130 (20th Street S) Interchange Project

The project involves an Interchange Justification Report, Environmental Assessment, design plans, and right-of-way acquisition for a new I-29 interchange at 20th Street South in Brookings, SD.


Finding of No Significant Impact (FONSI) Approved

January 25, 2021

The project Finding of No Significant Impact (FONSI) has been approved and signed by the Federal Highway Administration (FHWA) and the SD Department of Transportation (SDDOT).

View the FONSI.

Interchange Justification Report (IJR) Now Available

November 20, 2020

The IJR has tentatively been approved by the Federal Highway Administration.

View the IJR.

Project Partners