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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INTERRA Selected for Materials Testing for Village of Downers Grove

INTERRA was selected by the Village of Downers Grove as one of their prequalified firms for a period of three years (2016-2018). We look forward to providing Construction Materials Testing Services for the village. Our previous work with the Village …

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CREATE P1 – Englewood Flyover Wins ACEC Illinois 2016 Annual Engineering Excellence Award

The CREATE P1 – Englewood Flyover project has been chosen as an ACEC Illinois 2016 Annual Engineering Excellence Award winner. This award is conferred on a project to acknowledge exceptional engineering which satifies the client’s needs and advances the well-being …

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Eric Slusser, P.G., Joins INTERRA Team as Professional Geologist

INTERRA is pleased to announce that Eric Slusser, P.G. has accepted the role of Professional Geologist. In this position, Eric will provide his expertise for geotechnical and environmental projects for INTERRA. Eric has over twenty-six (26) years of experience in …

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