Quality, Service & Commitment

INTERRA NEWS

  • 08 May 2018

    IRTBA Announces INTERRA President To Serve On Green Council Board Of Directors

  • 28 Apr 2018

    INTERRA AWARDED IDOT PTB 187, ITEM 4 PROJECT

  • 08 Dec 2017

    INTERRA Honored With 2017 IRTBA Green Industry Achievement Award For Green Initiatives

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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

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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Little Village High School, Chicago, IL

INTERRA Services

During the demolition phase, INTERRA provided field compaction testing of the backfill material. In addition, the exposed subgrade after removal of the foundations was approved, prior to placement of the fill material. During the construction of the school, INTERRA provided bearing pressure tests for the foundations, field soil compaction testing for backfill material in the foundations and floor areas. Concrete testing was performed in the field including re-bar inspection during the placement of the concrete. Mortar and Grout sampling was also performed. Random sampling and testing of the CMU blocks and bricks was also performed. Structural steel testing consisted of weld inspections, shear stud testing, magnetic particle testing and bolted connection testing. Continuos roof inspection services were provided through our subconsultant. Asphalt testing services were provided for the parking areas.

 

Project Summary

The campus is comprised of four autonomous small schools: Multicultural Arts H.S., World Language H.S., Social Justice H.S., and Infinity: Math, Science, and Technology High School. The new school consisted of over 250,000 square foot area with basketball courts, swimming pools and auditorium.