For Immediate Release:
Tuesday, May 6, 2025

Contact:
Michael Noonan, Project Engineer, 605-367-5680

Eastbound On-Ramp Closure Scheduled for Interstate 90 at Brandon (Exit 406)

BRANDON, S.D. – On Monday, May 12, 2025, the eastbound on-ramp to Interstate 90 at Brandon (exit 406) will be closing as part of the Diverging Diamond Interchange (DDI) construction project. Motorists in the Brandon area planning to travel eastbound on I-90 should use exit 410 via the signed detour route using S.D. Highway 11, County Road 138 (Aspen Boulevard), and County Road 105. This closure and detour will be in place until the reconstruction of the eastbound on-ramp at exit 406 is complete in mid-July 2025.

The second phase of reconstruction on this DDI project includes completing the remaining on- and off-ramps, the eastbound lanes of I-90, the Exit Bridge, and the replacement of the eastbound I-90 bridge over the BNSF railroad. Weather dependent, the second phase of construction will be ongoing until November, 2025.

The prime contractor for this $41.3 million project is T & R Contracting of Sioux Falls, SD. The overall completion of the DDI reconstruction project at Brandon (exit 406) is June 2026.

Featured Project Information:
Find more information about this project on the SDDOT website at https://dot.sd.gov/i90-exit406-brandon-pcn-4433.

Sign Up for Text Notifications:
For updates on MAJOR traffic changes about this project, subscribe to a free text-in service. To subscribe, simply text "I90Exit406" to 605-566-4041. Subscribers can unsubscribe at any time. 

About SDDOT:
The mission of the South Dakota Department of Transportation is to provide a safe and efficient public transportation system.

For the latest on road and weather conditions, road closures, construction work zones, commercial vehicle restrictions, and traffic incidents, please visit https://sd511.org or dial 511.

Read more about the innovative work of the SDDOT at https://dot.sd.gov.

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