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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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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INTERRA’s full service materials testing laboratories are among the finest and most respected in the Midwest.  Our proprietary data management system provides up-to-date information regarding testing status, performs thorough quality control procedures, and allows clients to access test reports online. The quality of work performed by INTERRA is further demonstrated by the certifications we possess from various regulatory agencies.  Please visit agency websites for scope of accreditation and accredited methods or prequalification categories for each of our laboratories.

  • American Association of State Highway & Transportation Officials (AASHTO)
  • Illinois Department of Transportation (IDOT)
  • Indiana Department of Transportation (INDOT)
  • Michigan Department of Transportation (MDOT)
  • Wisconsin Department of Transportation (WISDOT)

Interra is certified as Minority/Disadvantaged Business Enterprise (M/DBE) by the following Agencies:

  • Illinois DOT (IDOT)
  • Indiana DOT (INDOT)
  • Michigan DOT (MDOT)
  • Wisconsin DOT (WisDOT)
  • City of Chicago
  • State of Illinois
  • State of Wisconsin