Henley-Johnston & Associates, Inc.

Comprehensive subsurface investigations, engineering geology, and foundation design parameter evaluations.

• Foundation Design & Analysis

  Lateral load analysis of drilled piers, driven piles, auger cast piles, group analysis, settlement, and slope stability analysis.

• Residential Geotechnical Services

  Geotechnical evaluations for new residential construction, additions, basements, swimming pools, and site retaining walls.

• Geotechnical Laboratory Testing

  A comprehensive range of ASTM soil and rock testing including Atterberg limits, unconfined compression, swell tests, triaxial testing, and USDA import soil license capabilities.

• Engineering Geology & Geomechanics

  Specialized geologic assessments, rock mechanics, and subsurface profiling in northern Texas and southern Oklahoma formations.

Field and laboratory quality control testing and construction inspection services.

• Materials Testing & Field Inspection

  Testing and inspection services for soils, concrete, asphalt, and structural elements.

• Specialty Testing

  Floor flatness and levelness testing, plate load testing, Windsor pin/probe tests, and structural frame load testing.

• Specialty Inspections

  Foundation construction inspection, fire-proofing, and fire caulking inspections.

Environmental screening and specialized non-destructive field investigation techniques.

• Phase I Environmental Site Assessments

  Environmental due diligence and site evaluations for property transactions.

• Advanced Field Scanning & Probing

  Ground Penetrating Radar scanning, pier depth determination using impact echo, soil-moisture probing, and double-ring infiltrometer testing.