Our core expertise in engineering, inspection, and materials testing is derived from the experience and educational background of our qualified and dedicated personnel. INTERRA demonstrates a commitment to providing industry leading services to every client on every project. INTERRA personnel have the experience, knowledge, project management skills, quality control procedures, safety awareness, and the results-driven objectives for each and every project. INTERRA values providing industry leading expertise and services. Our expertise includes:

Engineering

Geotechnical – INTERRA has completed numerous engineering, geotechnical, and drilling projects working on multi-story buildings, complexes, highways, and bridges. INTERRA has a full-service materials testing laboratory and provides the expertise and practical recommendations needed to successfully complete your project.

Environmental – INTERRA’s environmental team of engineers and scientists provides clients with a complete scope of pre-construction environmental services to delineate, understand, and remediate identified environmental liabilities. It is our goal to resolve any environmental issues quickly before and during the construction process to keep your project advancing as planned.

Inspection – INTERRA’s team of inspectors, documentation specialists, and certified engineering technicians provide the project coordination and work to ensure the materials provided to the construction site are inspected, tested, and comply with project specifications before installation. INTERRA also routinely handles any testing needs encountered during construction. Capabilities include:

Testing – INTERRA’s material testing laboratory is a state-of-the-art facility which delivers reliable, consistent, and efficient results. As an independent laboratory, clients can confidently rely on INTERRA for the duration of their project. INTERRA’s laboratory is accredited by ASTM/AASHTO, and state departments of transportation. Testing services include:

Additional testing:

  • Soil Excavation Observations and Recommendations
  • Mass Earthwork Monitoring
  • On-site Bearing Capacity Determinations and Soil Density Testing
  • Compaction Testing of Soils, Aggregates, and Asphalt
  • Piles and Caisson Installation Monitoring and Testing
  • Concrete Plant and Field Inspections
  • Asphalt Plant and Field Inspections
  • Prestress Concrete Plant Inspections
  • Masonry, Mortar, and Grout Placement Investigations and Testing
  • Weld Inspections
  • Structural Steel Non-destructive Testing
  • Floor Flatness Testing
  • Pile Load Testing
  • Landfill Construction Quality Assurance (CQA)
  • Roof Moisture Surveys and Installation Observation

Certifications

Our proprietary data management system provides our clients real-time access to project data and reports. INTERRA is certified and accredited by regulatory agencies in the industry. INTERRA has accreditations from the following:

  • American Association of State Highway & Transportation Officials (AASHTO)
  • Illinois Department of Transportation (IDOT)
  • Wisconsin Department of Transportation (WISDOT)

INTERRA is certified as a Minority/Disadvantaged Business Enterprise (M/DBE) by the following agencies:

  • Illinois Department of Transportation (IDOT)
  • Wisconsin Department of Transportation (WISDOT)
  • State of Illinois Central Management Services (CMS)
  • City of Chicago
  • State of Illinois
  • State of Wisconsin

Laboratory

INTERRA has a state of the art 13,000 SF facility that is fully equipped with the latest concrete equipment and is an IDOT and American Association of State Highway Transportation Officials (AASHTO) accredited material testing laboratory. INTERRA’s full-service laboratory is one of the most respected in the industry.