Quality, Service & Commitment


  • 26 Oct 2017

    INTERRA To Host Ribbon Cutting With Bolingbrook Mayor Celebrating Going Green

  • 21 Jul 2017

    Recipient Of Service Award Thanks INTERRA for Engineering Support With Jane Byrne Circle Interchange

  • 15 Mar 2017

    INTERRA, Inc. Full-Time Field Technician Openings in Franklin, WI

More News


Laboratory Certifications

  • IL & WI State DOTs
  • ASTM


Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

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Tamiami Trail Project-Florida: “Mr. Vyas and the whole Interra team were instrumental in contributing to the high quality work provided to the USACE.  Interra’s management went above and beyond in meeting our needs.” Larry Corn, Area Quality Manager,  Kiewit Infrastructure …

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Various Projects – City of Chicago

INTERRA Services Geotechnical Field Inspection and Testing

Concrete Plant and Field   Inspections

Hot-Mix-Asphalt (HMA) Plant and Field Inspection

Pavement Coring and testing

Laboratory testing of Asphalt Mixes

Laboratory testing of Concrete samples

Laboratory testing of Soil samples

Annual QC/QA review meetings are being conducted at our   facilities

Construction Inspection for ADA Ramps


Project Summary

Since 2003, INTERRA has been providing quality assurance testing and inspection of materials on various City of Chicago projects including Arterial, 50/50 sidewalk program, water Management projects. INTERRA’s services consisted of QA inspection at concrete and asphalt plants, soils and aggregate inspection and field inspections involving asphalt density testing and concrete testing.  Over 250 projects under the QC/QA construction Engineer Contract Spec. No. 21694 were covered. QA services were provided for various bridges over I-90/94 under the Expressway Viaduct Program. Provided testing and inspection services for ADA Ramps program.