Quality, Service & Commitment

INTERRA NEWS

  • 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

More News

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

LPV111, New Orleans East Back Levee, Louisiana: “Given the accelerated schedule requirements of this project both the testing lab & field staff were more than capable and willing to go the extra mile to ensure all manners of testing specifications …

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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