I-229/26th Street, Southeastern Avenue Reconstruction Projects

I-229/26th/Southeastern Projects

Update: 11/29/2019 

  • Concrete work will continue at the ends of the 26th Street bridge over I-229.
  • Now that the beams have been installed across the bridge piers over the Big Sioux River and RR tracks, bridge work will be discontinued until March 2020.
  • Work on drainage structures and tree removal will continue into December.
  • This will be the final update until construction begins again in the spring.  

Commuter Route Information

  • 26th Street traffic is now using part of the new I-229 bridge.
  • All lanes of 26th Street are now open to traffic west of Frederick Drive.

2019 Project Milestones

  1. March 25, 2019 - Begin construction, closing southern lanes of 26th Street
  2. May 2, 2019 - Close Southeastern Ave south of 26th St
  3. March 28, 2019 - Begin demolition of bridges over I-229 and Big Sioux River
  4. April, 2019 - Close Yeager Road
  5. November 2019 - Complete bridges over I-229
  6. May 2020 - Complete 26th Street bridge over Big Sioux River/BNSF
  7. May 2020 - Phase 1 completed


Sidewalk Detour

March 6: Public Open House

Live Webcams

26th & Cleveland




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Project Overview

Project Bid: $37,304,851.51

Contractor: D & G Construction Inc

26th Street and Interstate 229, including the Southeastern Avenue intersection, will be reconstructed beginning in 2019. The project will be a two-year project and is jointly funded by the South Dakota Department of Transportation and the City of Sioux Falls. The project area is experiencing high crashes, long driver delays, and has outdated geometrics. The project will add a railroad overpass, add turn lanes at Southeastern Avenue and 26th Street and also 26th Street and Interstate 229 to improve travel times and safety through the area. The project will also improve pedestrian movements across the interstate. 26th Street will remain open throughout the project.