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

I-229/26th/Southeastern Projects

Update: 3/27/2020  

  • The last construction update was November 27, 2019. 
  • Over the winter, the contractor removed trees along Southeastern Avenue and installed a 6’ round drainage pipe under the railroad tracks. 
  • Starting in March, the bridge contractor has been preparing the bridge over the river for concrete decking. 
  • Work on the new bridge will continue throughout April.

Commuter Route Information

  • Traffic remains the same as throughout the winter with one lane of traffic on 26th Street in each direction. 
  • Southeastern Avenue remains closed south of 26th Street and open north of 26th Street. 
  • Traffic conditions will not change until May.

2020 Project Milestones

  1. Begin construction of the bridge deck over the Big Sioux River
  2. Complete service road and connections onto Southeastern Ave to the south of 26th St
  3. Move traffic to the south side of 26th St
  4. Demolition of the north portion of the 26th St bridge over the Big Sioux River
  5. Construction of the piers
  6. Complete tie in work of the bridge over I-229
  7. Complete grading of 26th St near Rotary Park
  8. Utility installation on Southeastern Ave north of 26th St
  9. Construction of Southeastern Ave north of 26th St
  10. Open to traffic




Sidewalk Detour

March 6: Public Open House

Live Webcams

26th & Cleveland




Project Overview

Completion Date: July 2021

Contract Amount: $38,000,000

Project Summary:
This project will construct new on and off ramps from 26th St to I-229, realignment of Yeager Road and the construction of a new bridge over the Big Sioux River and the BNSF Railway.  Installation of new watermain, sanitary and storm sewer, new street lights and traffic signals.  

Contact Information

City of Sioux Falls
Dena Knutson


James Unruh

Contractor Name

D&G Concrete

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