INTERRA is IDOT prequalified in Special Services – Quality Assurance (PCC and Aggregate; HMA and Aggregate). INTERRA works as both a Prime and a subconsultant for many distinguished clients on many distinct projects. Our team is supported by AASHTO and IDOT accredited laboratory and have the credentials to successfully perform duties for any project. A partial list of projects are highlighted below:
- IDOT, South of I-80 to South of Weber Road (62K30, 62K51)
- Illinois Tollway, Burlington Northern Santa Fe Railway (BNSF) Over the Tri-State Tollway (I-294) (I-18-4428, I-18-4412)
- IDOT, PTB 187-004 (Prime Role)
- IDOT, PTB 197-002 (Prime Role)
- IDOT, I-80 at US 30 Interchange (60N87)
- IDOT, District One, QA Various Counties, Various Locations
- IDOT, Weber Road Interchange Reconstruction
- IDOT, Van Buren over I-90 / I-94 (60X99)
- US 41 from IL 176 to Park Avenue
- IDOT, US Route 6 East of I-294 to East of IL 1 (60774, 60E10)
- I-294 Corridor
- I-90 Arlington Heights