Brookings - Intersection on Interstate 29 & 20th St. South

Project Summary:

This project is the construction of a new interstate interchange on the south side of Brookings.  This interchange will make traveling south out of Brookings much quicker and less congested.   

Location: Intersection on I-29 & 20th St South in Brookings

To view more information about the initial planning phases of this construction project; visit:

Project Timeline: 

Anticipated Start Date: March 28, 2022
The project is anticipated to be completed during the summer of 2023.

Project Updates: 

April 2022: Start with removing fences, and installing temporary fences.  Then installing some erosion control items.  Next, they will start mucking out the pond and placing pit run material.  Next, they will start working on the bridge end embankments. 

Completed Work -
-Bowes has completed approximately 50% of the muck excavation and associated pit run installation for the pond beneath the proposed 20th street s/ramp c/ramp g on the west side of I-29.
-Traffic control has been installed on the project to include an advanced warning of construction areas on 22nd ave, 20th street s, and 34th avenue as well the northbound lane closure and associated two-way traffic in the southbound lanes on I-29.
-Temporary fence and silt fence have been installed along the project perimeters.
-Various removals necessary to facilitate construction have been completed.
-SFC has begun mobilizing equipment and materials to prepare for bent construction in the I-29 median.
-Work thus far has included muck removal and filling in of the pond on the west side on the new interchange.

*Project is on schedule. 

May 2022:
May 3, 2022 Progress Memo

News Articles:

Brookings Register Article 01/12/2022

Brookings Register Article 04/26/2022

Dakota News Now 05/01/2022

Project Press Releases: 

April 14, 2022

Project Photos: 


(Groundbreaking Ceremony 5/11/2022- photo courtesy of the City of Brookings)



Project Contract Amount:

$15.3 Million

Project Contacts:

Bowes Construction Inc

Waylon Blasius, Project Manager, 605-692-6342
Jeff Brink, SDDOT Engineering Supervisor, 605-882-5166 


Project PCN:  

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