Quality, Service & Commitment


  • 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

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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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Chalmette Loop Levee (LPV146) – Army Corps of Engineers

INTERRA Services

  All materials testing from INTERRA accredited on-site laboratory

  Proctors, Atterberg Limits, Grain Size/Hydrometer, Percent Fines, Organic Content, Moisture Content (Oven/Microwave) completed on approximately 330 soil samples

  Casting/Compressive Strength tests completed on over 11,000 concrete cylinders

  Field Compaction Tests using Nuclear Density Gauge and Sand Cone Tests

  100% Visual Testing (VT) and 25% Magnetic Particle Testing (MT) of approximately 15,000 Fillet Welds in the field

  100% Visual Testing and 25% Ultrasonic Testing (UT) of Butt Joints on approximately 750 H-Piles in the field

Project Summary

Saint Bernard Levee Partners was tasked by the USACE to construct the approximately 8-mile long concrete T-wall levee from Bayou Dupre to Hwy 46 in Saint Bernard, LA.  INTERRA provided complete construction materials testing and inspection for soils, concrete, asphalt and steel.  To accomplish this high-profile, fast-tracked project within the necessarily aggressive schedule, INTERRA established an on-site laboratory and had it successfully accredited by the USACE in matter of weeks.  The on-site laboratory not only maintained required quality standards over the course of the project, but was able to accurately process and document a dramatically large number of widely varied tests.