The understanding of a site’s geologic conditions is an essential prerequisite to the proper geotechnical evaluation of a site. This is true for both the remediation of damage caused by earth movement on existing improvements and the development of new projects. Geotechnical engineers rely on engineering geologists to provide them with this understanding of the potential geologic constraints that must be dealt with for the proper engineering design of structures supported on the earth. Typical geologic constraints that must be considered for the assessment of sites in the southern California region include:

  • Soil And Rock Conditions
  • Topography
  • Drainage And Flooding Potential
  • Seismicity
  • Potential Ground Rupture Due To Faulting
  • Ground Shaking Due To Earthquakes
  • Landsliding Due To Seismic Shaking
  • Liquefaction Potential
  • Tsunamis
  • Earth Movement
  • Landslides
  • Mud And Debris Flows
  • Subsidence Or Collapse Potential
  • Expansive Soils
  • Lateral Slope Extension (Slope Creep)
  • Erosion
  • Groundwater Conditions

DHLA’s geologists have considerable experience, knowledge and expertise in providing the services required to evaluate the influence of these geologic constraints on a particular site. Our geologic services are provided under the supervision of a certified engineering geologist licensed in the State of California and include:

  • Preliminary Geologic Mapping And Site Reconnaissance
  • Aerial Photograph Interpretation
  • Seismic Evaluation
  • Groundwater Assessment And Monitoring
  • Geologic Logging Of Boreholes And Test Pits
  • Preparation Of Geologic Maps And Cross-Sections
  • Monitoring And Geologic Mapping Of Earthwork Construction
  • Geophysical Surveying
  • Geologic Interpretation Of Instrumentation Readings
  • Preparation Of Reports And Documents Necessary For Permitting

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