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Austin, Texas
Geotechnical Engineering in Austin, TX
Austin may be the only major Texas city where the honest first question is which geology you bought. The Balcones fault zone splits the metro: to the west, shallow limestone with karst voids, building setbacks over recharge features, and excavation that needs rock tools; to the east, Taylor and Del Rio clays that rank among the most expansive in the state. Our investigations establish which regime governs, and where a site straddles the transition, map it, then run the drilling, coring, and laboratory program each side requires. Recommendations cover foundations from slabs to drilled piers socketed in rock, plus the excavatability and karst questions that decide budgets west of the fault line.
Karst features in the Edwards limestone, voids, caves, and recharge-zone regulatory overlays, are genuine site risks west of I-35, while PVR on Taylor clay governs the east side; the fault zone between them can put both on one parcel.
- Soil borings and sampling programs sized to the structure and site
- Laboratory index testing: Atterberg limits (ASTM D4318), moisture content (ASTM D2216)
- Moisture-density relationships and bearing evaluation for foundations and pavements
- Expansive-soil characterization for slab and pavement design
- Construction-phase verification: proof rolls, subgrade acceptance, fill placement observation
FAQ · Austin
What does building over the Edwards Aquifer recharge zone involve?
Regulatory overlays that constrain impervious cover and drainage design, plus geologic assessment for recharge features on the site itself. The geotechnical and environmental scopes intertwine here, and finding a void or feature early is far cheaper than finding it under a footing.
Why did my neighbor hit rock at two feet and my borings show clay?
The fault zone. Displacement across the Balcones system juxtaposes limestone and clay at short distances, which is exactly why borings on your parcel, not the one next door, are what the foundation gets designed from.
Scheduling & proposals
Need geotechnical engineering in Austin?
Call for same-day dispatch questions, or send project documents for a written proposal.