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

I-229/26th/Southeastern Projects

Update: 9/20/2019 

  • All I-229 lanes and west side ramps are are now open to traffic.
  • I-229 night time closures are completed.
  • Frederick Drive at 26th Street is closed.
  • Cliff Avenue Greenhouse driveway has been relocated.

Construction Activities:

  • Steel bridge beam installation for the I-229 bridge is complete and the contractor is starting to install the bridge deck forms.
  • Bridge contractor continues to work on several sections of the Big Sioux River bridge. 
  • Utility crews are installing watermain, sanitary sewer, and storm sewer lines in 26th Street between Frederick Drive and I-229.
  • Foundation and pier work for the Big Sioux River bridge continues.

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. October 2019 - Complete bridges over I-229 and Big Sioux River/BNSF
  6. November 2019 - Phase 1A/B completed

Commuter Route Information

  • Traffic control for Phase 1 construction is in place.


Sidewalk Detour

March 6: Public Open House

Live Webcams

26th & Cleveland




Sign Up for Notifications

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 The project area is experiencing high crashes, long driver delays, and has outdated geometrics.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.