GSG provided construction management and inspection services for the 159th Street Interchange project over the Tri-State Tollway. The project aimed to improve traffic flow through bridge replacement, ramp upgrades, lighting, drainage, and landscaping improvements.

Scope of Services

• • Contract Administration
  • Removal and replacement of the US Route 6 bridge over I-294
  • Roadway and ramp reconstruction, including toll plaza improvements
  • Maintenance of traffic and detour coordination
  • Overhead sign support repair and pavement marking updates
  • Installation and extension of drainage systems
  • Erosion control, landscaping, and lighting upgrades, including underpass lighting
  • Full inspection of bridge substructure and superstructure