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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You have skilled people, a superior laboratory facility with all the equipment in excellent condition and an outstanding QC/QA program. Your certified tranined staff was knowledgeable, courteous and proactive…

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K.I. Sawyer Air Force Base – Landfill 4, Gwinn, Michigan

INTERRA Services

Provided Construction Quality Assurance (CQA) Services on the installation of  approximately 2,000,000 sq. ft. of flexible membrane liner, gas vent layer, drainage layer for the final cap of  Landfill 4 at K.I. Sawyer AFB.  The cap construction was performed per Michigan Department of Environmental Quality (MDEQ) regulations. The work involved attending pre-construction meeting,  inventory of FML and on-site borrow soil at the site, density testing for gas vent layer, observation and documentation of the placement of drainage layer, material delivery, unloading, on-site transport and storage. Also monitored and documented activities such as trial seaming, panel deployment, and joining and seaming, non-destructive and destructive seam testing and repair operations.  Provided sampling for destructive seam testing and performed conformance sampling, measurement of installed quantities and visual inspection by walkover. Provided preparation of panel layout drawing, daily reports for Flexible Membrane Liner (FML) and the soils placed.