Seismic Hazard

Our team has experience in seismic source characterization, ground motion characterization, detailed site response analysis, seismic hazard and risk analyses across the United States.

Geotechnical Engineering

We specialize in seismic evaluation and retrofit of earth dams, tall buildings, and other critical infrastructure.  Our geotechnical practice includes a full range of services from site investigation to performance-based foundation evaluations.

Earthquake Induced Geologic Hazards

Our practice includes qualitative and quantitative assessment of the potential for surface fault rupture, tsunami inundation, and earthquake-induced liquefaction, settlement/densification, lateral movement, and landsliding.


Key Projects

Our team has worked on:

Seismic Hazard & Ground Motion Development

  • DCPP SSHAC Level 3
  • Blue Castle SSHAC Level 3
  • Transbay Terminal
  • Washington Monument

Geologic Hazards

  • California Hospital SPC-4D
  • U.S. Fish & Wildlife
  • U.S. State Department

Dam Safety

  • FERC Part 12D Independent Consultant Services
  • Potential Failure Modes Analyses (PFMA) Facilitation
  • Seismic Stability and Deformation Analyses
  • Remedial Dam Design


  • Liquefaction Evaluations for pipelines, tall buildings, critical infrastructure facilities
  • Site Investigations for New and Existing Buildings
  • Development of Foundation Recommendations in Complex Geologic Settings

Key Research Projects

Seismic Hazard and Ground Motion

  • NGA-West1
  • NGA-West2 Directivity Working Group
  • PEER Directivity Model
  • Ground Motion Rotation and Maximum Direction
  • PEER Validation Project

Geologic Hazards

  • Tectonic Deformation in Marin County

Geotechnical Engineering

  • PG&E Dam Risk Analysis
  • Newmark Displacement Model


Let us know what we can do for you.