
ENGINEERING SERVICES SPECIFICS
Technical Expertise Built Over Generations.
CTL's engineering team does more than complete a deliverable. We bring the kind of deep, applied knowledge that helps clients solve problems, reduce risk, and make informed decisions throughout the life of a project.

Geotechnical Investigations
Field investigations and laboratory analysis to support Phase I and II design projects, including authoring Roadway Geotechnical Reports (RGR) and Structural Geotechnical Reports (SGR) for local and regional agencies.

Mixture Design
Optimized and environmentally friendly concrete mix designs. Multitude types of HMA mix designs ranging from the versatile dense graded mixes, the high performing gap graded Stone Matrix Asphalt (SMA) to the echo friendly open graded pervious mixes. All HMA mixes are designed with a performance-based and a cost-effective approach. This CTL mix design development process is grounded in decades of materials expertise giving contractors and producers formulations they can build with confidence.

Material Recommendations
Independent, unbiased guidance on material selection and product evaluation, helping clients make informed decisions backed by technical knowledge and real-world performance data.

Consulting Engineering
Project-specific technical consulting from engineers who have worked on both the agency and contractor side, bringing a well-rounded perspective to every challenge.

Project Documentation
Thorough, accurate documentation services including geotechnical reports, inspection records, and project deliverables prepared to agency and client standards culminating in a seamless and expedient project close-out process.
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Emerging Tech Evaluation
Evaluation of new products and equipment to support implementation within agency standards, including HMA and PCC additives, performance testing equipment, state-of-the-art testing equipment, and smoothness testing equipment.

EXPERIENCE YOU CAN COUNT ON
110+
Years of Experience
4
Material Disciplines
100%
Accredited

FEATURED PROJECTS
Real Projects. Real Impacts.
DRESDEN LOCK & DAM
Illinois River
$48 million project included replacement of the miter gates, electrical systems, and valve recesses.
HUBOLT ROAD EXTENSION
Joliet, IL
A new bridge was constructed over the Des Plaines River providing a new river crossing for the Joliet area.



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