Quality, Service & Commitment


  • 22 Jan 2018

    Civil Engineer Needed

  • 08 Dec 2017

    INTERRA Honored With 2017 IRTBA Green Industry Achievement Award For Green Initiatives

  • 26 Oct 2017

    INTERRA To Host Ribbon Cutting With Bolingbrook Mayor Celebrating Going Green

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Laboratory Certifications

  • IL & WI State DOTs
  • ASTM


Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

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With this letter we provide our confidence in INTERRA¬†in providing comprehensive field and laboratory testing for projects involving soils investigations,¬†design and construction monitoring … Their services are consistently ontime and within budget…

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Projects By Location

Interra has multiple offices with DOT prequalified and accredited laboratory facilities to provide engineering, inspection and testing services.

You can learn about a few representative projects performed by each of our offices by following the links below.