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Southwestern Testing Laboratories, L.L.C.

Cutting Edge Solutions for Geotechnical & Materials Engineering Challenges

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About the firm

Southwestern Testing Laboratories, L.L.C. (STL Engineers) is a provider of geotechnical investigation, construction materials testing, and quality management and inspections based in Dallas, Texas. With over 20 years of experience, STL Engineers operates a 10,000-square-foot AASHTO-resourced, CCRL-accredited, and R-18 compliant laboratory facility serving public and private sector clients throughout Texas. It also maintains a West Texas market office in Midland.

Team
Small
Firm type
Geotechnical Engineering · Materials Testing

Credentials

AASHTO R-18 · ASTM D-3740, C1077, and ASTM E-329 Compliance · CCRL Participant · AASHTO laboratory accreditation Proficiency Sample Program Participant · USACE Validation for Aggregate, Concrete, and Soil Testing · ICC Certification · ACI Certification · NICET Certification · TxDOT Certification

People

Arcilia AcostaFounder & CEO

Capabilities

Geotechnical Engineering

Service website

Field exploration, foundation design analysis, and geotechnical investigation using modern methodologies to reduce delays and improve construction risk awareness.

  • Foundation Design Engineering
  • Pile Load Testing
  • Dewatering Systems Analysis
  • Embankment Evaluation
  • Slope and Erosion Protection
  • Dam Inspections
  • Retention Structures Engineering
  • Pavement Design Services
  • Forensic Failure Investigation

Construction Materials Testing

Service website

Specialized inspection, sampling, testing, and analysis services for construction materials to support project quality.

  • Soil Compaction and Stabilization Testing
  • Aggregate Evaluation
  • Concrete Mix Design and Testing
  • Drilled Pier and Pile Foundation Observation
  • Reinforcing Steel and Post-Tension Observation
  • Masonry Observation and Testing
  • Structural Steel Fabrication and Erecting Observation
  • Welder Qualifications and Procedures
  • Bituminous and Asphalt Paving Testing
  • Roofing Inspection and Testing

Inspection Services

Service website

Full-service quality control and quality assurance inspections for infrastructure and facilities projects.

  • Transportation Infrastructure Inspections
  • Airfield and Airport Inspections
  • Bridge and Structural Inspections
  • Vertical Building and Facility Inspections

Industries

Transportation · Oil & Gas · Government · Aviation · Education

Projects

TxDOT I-35 Managed Lanes Project

Lake Lewisville, TX · Transportation · Client: Archer Western, Granite Construction, Lane (AGL) Joint Venture

Project details

Served as the Construction Quality Acceptance Firm, conducting quality assurance and quality control management, inspection services, and construction materials testing for the first phase of a highway renovation.

Trinity Metro TEXRail

Fort Worth, TX · Transportation · Client: Trinity Metro

Project details

Provided testing and inspection services for a new 27-mile commuter rail line with nine stations, five parking lots, and crossings over nine bodies of water.

Dallas Love Field Airport Upgrades

Dallas, TX · Aviation · Client: Dallas Love Field Airport

Project details

Provided geotechnical engineering, construction materials testing, and inspection services for various design-build and construction projects.

Southwestern Testing Laboratories, L.L.C. - Engineering Firms