Quality, Service & Commitment

INTERRA NEWS

  • 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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Certified

Laboratory Certifications

  • IL & WI State DOTs
  • ASTM
  • AASHTO
  • USACE

 

Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

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Testimonials

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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NIPSCO R.M. Schahfer Landfill, Wheatfield, Indiana

INTERRA Services

Phase V

Construction Quality Assurance (CQA) Services were provided including related laboratory services for the construction of approximately 20 acres of landfill bottom liner. Work involved field density testing of the clay liner and nondestructive testing of the synthetic liner. Laboratory services include flexwall permeability, soil index and proctor tests.  Field services include construction monitoring during clay liner placement & synthetics placement.

Phase IV

Provided observation, field, laboratory testing and documentation during the construction of subgrade preparation, compacted soil liner installation, HDPE geomembrane liner installation, granular drainage layer installation, and protective soil layer installation.

Phase III Closure, Segment 2

Provided observation, field, laboratory testing and documentation during the construction of subgrade preparation, compacted soil liner installation, HDPE geomembrane liner installation, granular drainage layer installation, and protective soil layer installation