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

For additional information about this project, view:

Project Timeline: 

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

Pedestrian Detour Map:

Traffic Control Map:

Project Updates: 

Completed Work:The contractor completed work on the bent in the median of I-29. Quite a bit of grading work has been done near the structure including building up bridge ends and the ramps.

Anticipated Work to be completed in August:
The contractor will continue to work on the overhead structure and continue grading operations.


News Stories: 

Brookings Register Article 01/12/2022

Brookings Register Article 04/26/2022

Dakota News Now 05/01/2022

Project Press Releases: 

July 11, 2022

July 8, 2022

June 28, 2022

May 31, 2022

April 14, 2022

August 8, 2022

Project Video:

Project Photos: 

July 2022:
L to R: Overview of the bridge construction, bridge piling, grading)

June 2022: 
(L to R: Concrete for bent cap, Bridge Piling, Grading)


May 2022:

(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:  

TransportationDoing Business
Certification & AccreditationContractorsEngineering/Design ServicesEnvironmentalLocal Governments
Projects & Studies
PlanningStudiesConstruction ProjectsSDDOT InnovationPublic Meetings
Programs & ServicesTravelersInside SDDOTDOT Fact Book