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/
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Project Timeline:
Year One: July 2024 - December 2024
Year Two: Spring 2025 - Fall 2025
Year Three: Spring 2026 - June 2027
Detour Route:
Project Updates:
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.
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May 15, 2025:
April 15, 2025 – May 15, 2025, Completed Work: The I-229 bridge has been removed. Crews removed concrete pavement from the mainline, on-ramp, and off-ramp for southbound I-229. This pavement is being recycled and used as a base course material. The pavement, curb and gutter, and sidewalk on 41st Street and Pam Road have been removed and contractors installed underground sanitary sewer, water, and storm sewer utilities. Three of the four ponds near 41st Street were excavated, and the dirt was hauled to exit 3 to create bridge berms.
Anticipated work May 15, 2025 – June 15, 2025: The contractors will continue to grade the mainline, off-ramp, and on-ramp of southbound I-229. The pedestrian tunnel that goes under the southbound off-ramp at exit 4 should be completed. Cliff Avenue will be closed to traffic after Sioux Falls School District’s summer break begins. Once closed, crews will remove pavement, curb and gutter, and sidewalk and will then install underground water main, sanitary sewer, and storm sewer. Contractors also plan to pave 41st Street and a small portion of Pam Road.
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
