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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Chicago Shore Line Storm Damage Reduction -Montrose Harbor

INTERRA Services

Quality Control Services during construction included soil sampling and analytical testing, embankment construction observation and testing, observation and documentation of sheet piles and H-pile installation and wave equation analysis, concrete testing, inspection and testing for bituminous pavement construction. 

Project Summary

The project involved the construction of a stair-step shoreline revetment approximately 2000 feet long at Montrose Harbor.  Significant items of construction include a steel sheet pile wall with battered pile support, steel H-piles, concrete promenade, stone fill, geotextile separation fabric, and stone toe protection.