geotechnical engineering and material testing services
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Willdan has offered a full complement of geotechnical engineering and geology services since 1997, and provides material testing and inspection services, as well. We maintain a full-service soil testing laboratory certified by the City of Los Angeles and California Department of Transportation. We also participate in the AMRL, CCRL, and Caltrans Proficiency Programs. Consulting engineering and construction support services are provided to public agencies for capital improvement projects, and to private developers for major civil and commercial/ industrial projects, or as third-party reviews.

Our staff includes geotechnical engineers, geologists, special inspectors, and field and laboratory technicians, with a pool of qualified independent construction specialty inspectors and technicians.

Willdan has successfully completed a wide array of projects in infrastructure improvements, transportation, port and harbor, essential facilities, and park and recreational installations (see representative projects).

Geotechnical Engineering

  • Subsurface exploration
  • Soil testing
  • Settlement analysis
  • Slope stability evaluation
  • Ground improvements and soil stabilization
  • Pavement design and evaluation
  • Shallow and deep foundation recommendations
  • Hillside grading recommendations
  • Engineered fill design
  • Earth retaining structure design
  • Erosion control and river channel rehabilitation
  • Construction inspection and monitoring

Earthquake Engineering

Alta Canyada slope slide
  • Dynamic soil behavior
  • Ground motions evaluation
  • Liquefaction investigation and mitigation
  • Performance evaluation of slopes and retaining walls under dynamic loading
  • Retrofit/Rehabilitation of foundation systems to mitigate dynamic loading impact

Full-service Geotechnical Laboratory

geotechnical laboratory
  • Nuke gauge
  • Atterburg limits
  • California bearing ratio
  • Compaction and consolidation
  • Collapse
  • Direct shear
  • Expansion index
  • Grain size distribution
  • Hydrometer analysis
  • In-situ moisture and density
  • Sand equivalent
  • Specific gravity
  • Unconfined compression

Engineering Geology and Hydrogeology

geology and hydrology
  • Feasibility Investigations
  • Remote sensing imagery analysis
  • Geologic mapping
  • Fault investigations
  • Geologic hazard assessment
  • Forensic studies
  • Landslide investigation and repair
  • Slope erosion investigation and stabilization
  • Pump test assessment
  • Dewatering analysis