DART Blue Line Expansion

Industries: Light Rails

The DART Blue Line Expansion from the Downtown Garland Light Rail Station to a new Downtown Rowlett station is important economic engines that will help drive economic development in Garland, Rowlett and the entire Metroplex. DART has chosen the design-build method to deliver the 4.8 mile light rail project. It includes one station in downtown Rowlett, concrete structures, track work and other miscellaneous items.

TERRA provided geotechnical drilling, sampling & field-testing and geotechnical laboratory testing.

Total of sixty-one (61) borings from 15.0 feet to 70.0 feet depths

Geotechnical testing included:

  • Atterberg Limits
  • Triaxial UU – Rock
  • Moisture Content
  • Triaxial CU – Rock
  • Dry Unit Weight
  • Direct Shear
  • Sieve Analysis
  • Consolidation
  • Grain Size Distribution – Hydrometer
  • Brazilian Test
  • Percent Passing #200 Sieve
  • Swell Test
  • Unconfined Compression – Rock
  • Soil Resistivity
  • Unconfined Compression – Soil
  • Corrosion Potential


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