INTERRA is an industry leading provider of Engineering, Inspection, and Testing services delivered in support of construction, development, environmental, and geotechnical projects in a wide variety of end-user markets throughout the Midwest.

State highway departments, federal agencies, FORTUNE® 500 companies, municipalities, top-tier healthcare corporations, preeminent construction firms, commercial property owners – to name a few – are all longterm INTERRA clients; many of which retained the firm when it opened its doors in 1996 as Great Lakes Soil & Environmental Consultants, Inc.

We believe the number and duration of our long-term clients is indicative of our consistent ability to deliver:

+  cost-effective, common-sense solutions to challenging engineering problems
+  value-added construction management services to achieve project and owner objectives, and
+  reliable material testing data when promised to facilitate project decisions and progress.

Our clients know that INTERRA is fully committed to complete client satisfaction and that we have the personnel, expertise, experience, systems, technology, competitive pricing, and drive to deliver just that…complete satisfaction for every client on every project.

INTERRA Awarded 2020 HACIA DBE Professional Services Firm of the Year

BOLINGBROOK, IL - INTERRA, Inc. is pleased to announce their recent honor selected as recipient of the 2020 Disadvantaged Business Enterprise (DBE) Professional Services Firm of the Year Award by the Hispanic American Construction Industry Association (HACIA).

Read more

With this letter we provide our confidence in INTERRA in providing comprehensive field and laboratory testing for projects involving soil investigations, design and construction monitoring … Their services are consistently on time and within budget…

Great Lakes Naval Base, Great Lakes, IL: “They reacted extremely well to ever changing schedule demands and testing needs on short notice.”

Blinderman Construction Company Joseph Albrecht, QC Manager