Business Details
27 Years
experience
Trusted Geotechnical Engineering Services
For over 25 years, Evans Colbaugh & Associates has provided geotechnical engineering expertise to residential, commercial, and public works sectors. Our firm combines deep technical knowledge with a commitment to integrity, delivering tailored solutions for complex earth science challenges. With licensed professionals in California, Arizona, and Nevada, we offer forensic investigations, litigation support, and construction monitoring services. Our team's multidisciplinary approach ensures comprehensive analysis of subsurface conditions, slope stability, and structural integrity. We maintain a focused organizational structure to preserve quality while adapting to evolving industry standards.Our engineers have testified as expert witnesses in both defense and plaintiff cases, reflecting our reputation for objectivity. From initial site assessments to construction phase support, we prioritize actionable insights that address client-specific needs. Our 20-year track record demonstrates consistent delivery of technically rigorous yet practical engineering solutions. We serve both new development projects and existing structures requiring distress evaluation or remediation. Our geographic reach spans Southern California, Arizona, and Nevada, with specialized expertise in landslide analysis and geotechnical instrumentation.
Services
Geotechnical Investigations
Forensic Analysis
Litigation Support
Construction Monitoring
Landslide Evaluation
Foundation Assessments
Slope Stability Analysis
Groundwater Studies
Details
- Year established: 1999
Highlights and features
- 25 years of specialized geotechnical engineering experience
- Licensed professionals in California, Arizona, and Nevada
- Comprehensive forensic investigation capabilities
- Proven expert witness testimony experience
- Integrated geological and engineering analysis approach
Services
Geotechnical Investigations
Our geotechnical investigations assess subsurface conditions through field testing and laboratory analysis. We evaluate soil properties, groundwater conditions, and potential geologic hazards to inform foundation design and construction planning. Our engineers provide actionable recommendations for residential, commercial, and infrastructure projects.
Forensic Analysis
We conduct detailed forensic evaluations of distressed structures to identify failure mechanisms and causation factors. Our team performs site inspections, material testing, and engineering analysis to determine remediation requirements for residential developments and commercial properties experiencing settlement or movement issues.
Litigation Support
Our licensed professionals provide expert witness services for geotechnical matters in legal proceedings. We prepare technical reports, participate in depositions, and deliver courtroom testimony based on thorough analysis of site conditions and engineering principles for both plaintiff and defense representation.
Construction Monitoring
We offer construction phase services including earthwork testing, foundation inspections, and structural monitoring. Our engineers ensure compliance with design specifications during grading, excavation, and foundation installation while addressing field conditions that arise during construction activities.
Landslide Evaluation
Our team specializes in landslide investigation and mitigation planning. We assess slope stability, monitor movement patterns, and develop remediation strategies for residential communities and infrastructure projects affected by geologic instability in Southern California's challenging terrain.
People
E. David Colbaugh
President
M.Sc., PE, G.E. Licensed in California, Arizona, and Nevada with 25 years of geotechnical engineering experience. Specializes in forensic analysis, litigation support, and slope stability evaluation for residential and commercial developments.
Questions
What geotechnical services do you offer?
We provide subsurface investigations, foundation analysis, landslide evaluations, forensic engineering, and construction monitoring services for residential, commercial, and public works projects.
Do you handle litigation cases?
Yes, our licensed engineers provide expert witness testimony, technical reports, and courtroom support for geotechnical matters in legal proceedings.
Which states do you operate in?
We serve Southern California (including San Diego, Orange County, and Los Angeles), Arizona, and Nevada with licensed professionals in all three states.
How experienced is your team?
Our firm has 25 years of experience with a principal engineer holding licenses in three states and advanced expertise in geological engineering analysis.
Can you assess existing structures?
Yes, we conduct forensic evaluations of distressed buildings and infrastructure to identify causes of movement, settlement, or structural failure.
Do you work on new developments?
We provide pre-construction geotechnical assessments and ongoing construction phase support for residential, commercial, and public infrastructure projects.
