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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Since INTERRA first opened its doors as Great Lakes Soil & Environmental Consultants, Inc. in 1996, we have been delivering project success non-stop. The depth and breadth of our project experience is second-to-none and our commitment to understanding and then achieving our clients’ specific project needs is what drives us forward.

In each of our core areas of expertise, engineering, inspection, and materials testing, we have completed a significant number of diverse projects and have accumulated an equally large number of success stories. Although our success stories are varied, most have a common element that describes how we overcame demanding project obstacles, met aggressive deadlines, or developed and executed creative solutions to complex problems that save time and money.

We invite you to review more of our work to see what we can do for you.