Interstate 229 Exit 4 - Cliff Ave Reconstruction
Project Summary:
Years Two and Three: The project includes the reconstruction of exit 4 (Cliff Avenue) with added lighting, signals, and mainline Interstate work. The Interchange will be reconstructed as a Single Point Urban Interchange. This project includes two structure replacements. 41st Street will be realigned to intersect with the Lincoln High School entrance. Traffic signals will be added to the intersection of Cliff Avenue & 38th Street. Pedestrian mobility will be improved with a new trail, sidewalk, and access tunnels. The southbound I-229 lanes and structure will be constructed in 2025 and the northbound I-229 lanes and structure will be constructed in 2026.
Year One: This project includes the modification of the median crossovers with a temporary structure in preparation for the 2025 interchange reconstruction. This project also includes the temporary widening of Interstate 229 northbound.
Find information on the project study here: https://www.i229exits3and4.com/
Sign Up for Text Notifications:
For updates on MAJOR traffic changes, subscribe to a free text-in service. To subscribe, simply text the keyword listed below to 605-566-4041. Subscribers can unsubscribe at any time.
Text I229Exit4 to 605-566-4041
Project Timeline:
Year One: July 2024 - December 2024
Year Two: Spring 2025 - Fall 2025
Year Three: Spring 2026 - June 2027
Detour Route:
Project Updates:
July 18, 2025:
June 15, 2025 – July 15, 2025, Completed Work: Contractors have completed water main, sanitary sewer main, and storm sewer work for Cliff Avenue, 41st Street, and Pam Road. Most of the rough grading for southbound I-229 along with the southbound on and off ramps has been completed. The contractor also has driven pile and poured the footings and stems for the southbound bridge piers.
Anticipated work July 15, 2025 – Aug. 15, 2025: The main focus in the coming weeks will be completing the surfacing work on Cliff Avenue and 41st Street so that these roads can be opened to traffic before the start of the new school year. The retaining wall contractor will also be working on installing an MSE wall, which will be located between southbound I-229 and the southbound off-ramp. Meanwhile, the bridge contractor will continue constructing the substructure for the southbound bridge and plans to install new steel girders in early to mid-August.
---
July 15, 2025: Lane Closure Scheduled for Minnesota Avenue at Interstate 229 in Sioux Falls
Beginning at 8:30 a.m. on Wednesday, July 16, 2025, the northbound outside lane of Minnesota Avenue will be closed between the Interstate 229 northbound on-ramp and the I-229 southbound off-ramp. The northbound outside lane of Minnesota Avenue is scheduled to be reopened to traffic by 4:30 p.m. the same day. Weather dependent, this closure will also be utilized on Thursday, July 17 and Friday, July 18, 2025, between the hours of 8:30 a.m. and 4:30 p.m.
The lane closure will allow crews to install a temporary large block retaining wall. This closure is part of a larger overall project that will reconstruct I-229 exit 4 (Cliff Avenue) and includes, lighting, signals, mainline Interstate work, two structure replacements, and median crossovers. Motorists are reminded to use caution and reduce their speed while workers and equipment are present.
The prime contractor on this $48 million project is T&R Contracting, Inc. of Sioux Falls, SD. The overall completion date is June 2027.
---
May 20, 2025:
Beginning Tuesday, May 27, 2025, Cliff Avenue will be closed to all traffic from north of the existing northbound Interstate 229 exit ramps to 38th Street in Sioux Falls. The closure is needed for the contractor to reconstruct this portion of Cliff Avenue and the Sioux Falls Lincoln High School parking lot.
This portion of Cliff Avenue is scheduled to be closed until mid-August. A signed detour will be provided to motorists utilizing 33rd Street, 57th Street, and Minnesota Avenue to navigate around the work zone. Once reopened, traffic will be restored in one lane both northbound and southbound.
Project Photos:
Project Contract Amount:
Year One: $5.6 Million
Year Two and Three: $48 Million
Project Contacts:
605-940-1000
Year One: Soukup Construction, Inc.
605-332-5282
Year Two and Three: T&R Contracting
