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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Chicago O’Hare Airport, Terminal 6 Project: “We would like to extend our appreciation to you and all of your employees who worked on the Terminal 6 Project.  All work was performed professionally, accurately and thoroughly. Your commitment to quality and …

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I-94 Mitchell Interchange, Milwaukee, WI

INTERRA Services

Materials Coordination

Concrete Plant and Field   Inspections

Concrete Strength Testing

Concrete Maturity Testing

Aggregate Testing

Project Summary

INTERRA provided construction materials inspection, testing and materials QMP services for reconstruction of the Mitchell Interchange project in Milwaukee Area, Wisconsin. The project will improve safety, help ease congestion and modernize this important 35-mile transportation artery, including: constructing an additional lane in each direction for a total of eight lanes, replacing deteriorating pavement and structures with new designs, moving ramp exits to the right side of the freeway, providing aesthetic treatments for those who live adjacent to the freeway.