Quality, Service & Commitment


  • 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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Laboratory Certifications

  • IL & WI State DOTs
  • ASTM


Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

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U.S. Route 34 at the Canadian National (CN) Railroad Bridge Construction: “Thanks very much for a job well done throughout this entire project. Congratulations to you and your staff!” David A. Cuthbertson, PE, Senior Project Manager, Alfred Benesch & Company

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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.