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Allied Health Building

STL Engineers performed testing services on building materials for the new edition to Brookhaven College and North Lake College. Two of the prominent campuses of the Dallas County Community College District.

DFW International Airport

STL Engineers were selected to perform renovations of terminals A & C, enhanced Terminal A parking garage, Terminal E parking garage and airfield pavement repairs. We provided CMT Services and Inspection Services for the Renovations of Terminals A & C.

Dallas Love Field Airport

For more than 8 years, STL Engineers has provided geotechnical engineering services, CMT Services (including asphalt), and Inspection Services for various design-build and construction projects at Dallas Love Field.

Trinity Metro TEXRail

TEXRail is a new 27-mile commuter rail line with nine stations (seven new and two modifications to existing stations within a live track environment). This commuter line passes through downtown Fort Worth, Haltom City, North Richland Hills, Hurst, Colleyville, Southlake and Historic Downtown Grapevine into the north side of DFW International Airport (DFWIA) Terminal B. This project crosses the Trinity River and nine other bodies of water. The two existing stations, T&P and ITC stations, are shared by the Trinity Railway Express (TRE) and remained operational for the entirety of the construction phase. The stations included five parking lots, which used a total of 95,000 CY concrete, with bus bays, light poles, landscape islands, and bus shelters.

TxDOT I-35 Managed Lanes Project 

STL served as the Construction Quality Acceptance Firm (Quality Assurance and Quality Control Manager and conducted all Inspection Services and Construction Materials Testing) for the first phase of a $1B highway renovation. The first phase consists of 28 miles of new service road, a bridge over Lake Lewisville, and reconstructing the center HOV lanes into managed toll lanes. STL set up a state of the art on-site laboratory to handle all testing and aspects of the project. STL also performed all acceptances for inspections, submittals, and traffic control in a role TxDOT would typically perform on a standard TxDOT project. Prime Contractor was a joint venture between Archer Western, Granite Construction, Lane (AGL).

Texas A&M University

Material testing sites included the Texas Transportation Institue (TTI), Texas A&M Music Hall in Killeen, TX ,and dormitories (housing over 600 beds) at both Texas A&M Main Campus in College Station and Tarleton State University in Stephenville, Texas. 

DART Projects

STL provided CMT Services for both Phase I and Phase II of the first modern streetcar in the State of Texas. STL Engineers was selected by various contractors to perform Quality Control/Quality Assurance, CMT Testing, and Inspection Services for the expansion of the DART Blue Line from Garland to Rowlett, and the CM/GC-1 1 and CM/GC- 3 DART Green Line. In 2020, STL began working on the DART Platform Extensions for the DART Red Line from Downtown Dallas to the UNT College Campus, and other miscellaneous DART projects. STL provided valuable lessons learned to the construction teams by providing testing of concrete, soils, rail ballast, sub-ballast, grade beams, and MSE retaining wall backfill. For a full description of DART projects, click here. 

Energy Technology Center

The Center of Excellence for Energy Technology (CEET), an 87,000 square foot, $42 million learning and training center, houses TCC’s heating, ventilation, air conditioning and refrigeration programs as well as training programs for oil, gas and renewable energy technologies.

STL Engineers has over 26 Clients.

Here are some of the valued clients we have served.



Klyde Warren Park - Park Deck & Tunnel System

STL was contracted by Archer Western to provide construction materials and testing services for the construction of the tunnel deck of Klyde Warren Park in Dallas, TX.

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