I-57 Interchange of Bourbonnais Pkwy Construction

Firm: Farnsworth Group, Inc

Other Consultants: Hutchison Engineering, Inc., Quigg Engineering, Inc., Lin Engineering, Inc. Kankakee Valley Construction Company

Owner: Illinois Department of Transportation

Description:As the Prime Consultant, Farnsworth Group was awarded a Phase III contract by IDOT from PTB 169/24. Services included construction inspection engineering for the new diamond interchange at 6000 N Road (Bourbonnais Parkway) and I-57. The project also included the construction of a bridge over I-57; reconstruction of the intersection at US 45/52 and IL 50; and reconstruction of over one mile of 6000 N Road from IL 50 to US 45/52 with new PCC pavement, curb and gutter, shared use path, sidewalk, storm sewer, roadway lighting, traffic signals, and other related items. The project was funded utilizing federal and state funds. The Farnsworth Group team collaborated closely with IDOT staff, the Contractor, Subconsultants, Communities, and Stakeholders throughout the construction of this 3-year-long, $46 million project.

Farnsworth Group performed on-site engineering inspection, provided construction staking/layout when not provided for in the contract plans, verified construction staking/layout, provided on-site geotechnical and material inspection, prepared records, maintained documentation, and performed any other duties that would require the services of an engineer to complete this project in a timely basis and in accordance with State specifications. We also furnished an engineer to act as Assistant Resident Engineer (ARE) for this project.

A unique solution to the maintenance of traffic (MOT) along I-57 was developed and implemented by utilizing the new diamond interchange ramps during the reconstruction of the new interchange bridge. All I-57 mainline traffic was detoured onto the new interchange ramps while each I-57 mainline lane was closed. Special temporary lighting, signing, and traffic signals were utilized to implement this unique traffic maintenance staging solution. This allowed the existing bridge and overpass to be safely and expeditiously demolished and then the new bridge constructed. This staging was very complex and required constant inspection, maintenance, and upgrades in order to maintain a safe detour in all types of weather conditions.

The new bridge construction incorporated several features that significantly improved the safety and welfare of the communities and traveling public. The existing bridge was only two lanes with no sidewalks or bike path accommodations and had a shoulder pier along I-57 that required clear zone hazard protection. The new structure included a new sidewalk and a new bike path that connected into the local community system and provided a safer crossing of I-57 for all users. In addition, the new structure was a two-span steel girder bridge that eliminated the old shoulder pier obstruction, which improved the safety of the motoring public along I-57.

Additionally, there were several other key and significant safety and welfare enhancements that this project provided. One such key feature was the shifting of the entire existing IL Route 50 intersection away from the existing at-grade rail crossing for the CNRR mainline tracks. This existing intersection was close to the at-grade crossing and created issues with queuing traffic. Successful implementation of this improvement allowed for a safer clear distance from the intersection for the motoring public. Constant and effective communication and coordination by the team with the Village of Bourbonnais and the CNRR was key to the successful implementation of this important safety improvement.

Illinois Department of Transportation

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