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EVANS, COLBAUGH & ASSOCIATES, INC. (ECA) is a consulting firm which, for 25 years, has provided geotechnical engineering services in the applied earth sciences with emphasis on the two essential elements in consulting - integrity and quality.

ECA is committed to maintaining a comparatively small, efficient organization which continues that tradition; quality work with integrity.

ECA has well qualified experience, either in-house or teaming with other consultants, in the following areas to offer proficient advice. Mr. Colbaugh (resume at the following link) is licensed in three states: California (Civil Engineer 29063, Geotechnical Engineer 228), Arizona (Civil Engineer 39373), and Nevada (Civil Engineer 16086).

GEOLOGICAL & GEOTECHNICAL INVESTIGATIONS

  • Residential Development
  • Commercial and Industrial Buildings
  • Public Works Facilities
  • Earth Retaining Structures
  • Landslides
  • Debris Flows

FORENSIC INVESTIGATIONS

  • Residential, Homeowners Associations
  • Commercial and Public Works
  • Detailed Distress Inventories
  • Floor Level Surveys
  • Structure Distress
  • Ground Movement (Settlement, Expansion)
  • Slope Distress/Failures

LITIGATION SUPPORT

  • Expert Witness
  • Deposition/Trial Testimony

GEOTECHNICAL INSTRUMENTATION

  • Landslide Movement
  • Ground Settlement
  • Ground Water Flow
  • Lateral and Vertical Deformation
  • Structural Deformation

CONSTRUCTION

  • Observation and Testing of Earthwork
  • Analysis of Temporary Slopes during Construction
  • Underpinning
  • Caisson / Tie Back Structures