With hundreds of geotechnical engineers, soils technicians, and drillers on staff, Tetra Tech is a leader in geotechnical engineering in North America. We use state-of-practice techniques and test procedures to investigate, analyze, and develop geotechnical engineering recommendations and designs for simple and complex groundwater, soil, and rock challenges.

Our services include:


  • Onshore and offshore site investigations using cone penetration test (CPT), standard penetration test (SPT), large penetration test (LPT), dynamic cone penetration test (DCPT), and rotary sonic
  • Hydrogeological investigations and permeability testing
  • Geologic hazard identification
  • Avalanche and rockfall evaluations
  • Granular resource evaluations
  • Geotechnical laboratory testing
  • Borrow material investigation and evaluations
  • Geotechnical instrumentation
  • Geomechanical assessment of caprock formation strength (using high-pressure triaxial test)
  • Air photo interpretation
  • Ground reconnaissance and terrain assessment and surficial geology mapping
  • Geophysical investigations (onshore, offshore, and downhole)
  • GIS mapping and analysis of LiDAR and satellite imagery
  • Rock mass classification and property assessment


  • Permafrost engineering and geothermal analysis
  • Seismic hazard evaluations and earthquake engineering
  • Sedimentation control studies
  • Engineering risk assessment
  • Slope stability analysis
  • Dewatering and seepage analysis
  • Corridor route evaluations for roads, railways, and pipelines
  • Site geotechnical feasibility analysis
  • Dam safety geotechnical review
  • Acid rock drainage and metal leaching prediction and assessment
  • Liquefaction triggering assessment
  • Earthquake-induced lateral spreading assessments
  • Settlement estimation
  • Numerical modelling (FLAC, UDEC, PLAXIS, and GEMCOM)
  • Free-field seismic and soil-structure interaction analysis


  • Foundation designs (deep, shallow, and dynamic)
  • Rock cut and tunnel design
  • Assessment and design of earth- and rock-fill dams
  • Slope remediation and reclamation design
  • Design of road, railway, and airstrip embankments
  • Soil-pipe-interaction design guidance for pipelines and hydrocarbon well casings
  • Waste facilities design
  • Erosion protection for stabilization measures
  • Geotechnical design of mechanically stabilized earth (MSE), gravity, and cantilever retaining walls and shoring systems
  • Blast design and overbreak and underbreak mapping and evaluation
  • Ground improvement design
  • Trenchless technology

Related Projects

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Rising water of the Quill Lakes threatening Highways 6 and 16.

Engineering Design Services for Flood Prevention, Saskatchewan

Providing engineering solutions to raise highways 6 and 16 near the Quill Lakes, Saskatchewan, Canada

Pearl Creek flooding Highway 22 during embankment failure

Rapid Response and Critical Repair of Washed-out Highway, Saskatchewan

Providing emergency response and time-critical repair of the breached Highway 22 embankment at Pearl Creek in Saskatchewan

Bridge over North Saskatchewan River

Anthony Henday Drive, Bridge over North Saskatchewan River

Assessing headslope stability for a bridge over the North Saskatchewan River in Edmonton, Alberta

Scenic North Roadway Construction

Scenic Drive North Roadway Construction Project

Supporting the design and construction of an arterial roadway in the city of Lethbridge, Alberta

Anthony Henday Drive

Northwest Anthony Henday Drive Project

Providing geotechnical, material, and pavement engineering support for a new roadway in Edmonton, Alberta