INTERRA is prequalified by IDOT In General Geotechnical Services, Structure Geotechnical Reports (SGR) and Subsurface Explorations. Our team is supported by AASHTO and IDOT accredited geotechnical testing laboratory. Our team members have the credentials and project experience to successfully perform duties for any project. A partial list of projects are highlighted below:
- Theodore Street Bridge, Joliet, IL
- Olympic Boulevard Bridge Over Rock Run Creek
- IDOT, PTB 195-015: IL 31 from IL 120 to IL 176
- Geotechnical Services Upon Request (RR-19-4480)
- Houbolt Road Diverging Diamond Interchange
- Central Street Bridge, City of Evanston
- EOWA, Westbound Collector Distributor Road, Phase II (I-17-4674)
- Willow Road from IL 43 to I-94 Phase I/II
- US 20 Various Improvements
- Gately Park, Chicago Park District