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.


Construction Bids Opened

November 18, 2021

SDDOT opened bids for construction on November 17. Four contractor bids were submitted. The low bid was $15.3 million. The final Engineer’s Estimate was $15.8 million. The bids were all within the limits of the BUILD Grant funding so construction is expected to begin in early 2022 as scheduled.

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.

Project Partners