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

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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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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