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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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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New Orleans East Back Levee (LPV111) – 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 3,700 soil samples

  Compressive Strength tests completed on concrete cylinders

  Field Compaction Tests using Nuclear Density Gauge and Sand Cone tests

  Field concrete testing

  Pile driving inspections

  Concrete testing

  Soil testing

  Rebar pull tests

  Salinity and chemical analysis of water for Deep Soil Mixing Operations

Project Summary

Archer Western-Alberici Joint Venture was tasked by USACE to reconstruct, elevate, and reinforce more than five miles of levee outside of New Orleans. The project is a part of the federal government’s efforts to protect New Orleans from hurricanes.

The team also constructed more than 2,000 lineal feet of concrete flood wall. In addition, the team raised the elevation of the levee from an average of +14 to +26 feet using approximately 1.7 million cubic yards of clay embankment in an 18-month period.

Soil below the levee was strengthened through the use of deep soil mixing; a technology that uses large augers to drill holes in which cement is mixed with the soil to create a column of soil and cement that is left in place.