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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LPV111, New Orleans East Back Levee, Louisiana: “Given the accelerated schedule requirements of this project both the testing lab & field staff were more than capable and willing to go the extra mile to ensure all manners of testing specifications …

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About Us

INTERRA at a Glance:
  • Multiple Offices.  INTERRA has offices / testing laboratories in Illinois and Wisconsin
  • Meets the Challenge.  INTERRA has completed large and demanding projects throughout the United States as the prime consultant and as a sub-consultant
  • Agency Prequalified.  INTERRA is prequalified with state DOTs in various categories related to construction inspection and QA testing
  • Accreditations.  INTERRA’s material testing laboratories are accredited by state DOTs, Army Corps of Engineers, and AASHTO to provide common and advanced testing for soils, concrete, hot-mix asphalt, and aggregates
  • Quality + Client Satisfaction.  INTERRA invests in and is fully committed to the use of systems, procedures, and employee training and certifications to sustain high quality standards in everything we do for complete client satisfaction
  • Safety + Client Satisfaction.  INTERRA is a safety-driven organization and has achieved a superior record completing projects without incident for complete client satisfaction
  • IT + Client Satisfaction.  INTERRA employs a technology-based information management ‘backbone’ to:
    • process and organize high volumes of sample/technical data
    • maintain consistent, accurate, and reliable documentation
    • deliver material test results in near “real-time” to expedite project progress and decision-making for complete client satisfaction
  • Sound Management.  INTERRA has a strong management team and stable ownership to drive organizational consistency, superior client service, reliability, and accountability
  • Business Designations.  INTERRA is certified as a Disadvantaged/Minority Business Enterprise with various state DOTs and local agencies