CGi Services

CGi is a professional consulting firm specializing in geotechnical engineering, engineering geology, materials testing and special inspection.


Geotechnical Engineering

We provide geotechnical services for water and wastewater facilities, tanks, pipelines, pump stations, airports, schools, roadways, bridges, trenchless.

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Special Inspection Services

The International Code Council of Building Officials (ICC) certifies our special inspectors in structural masonry, reinforced concrete, post-tensioned concrete, and spray applied fireproofing. Our welding inspectors are ICC certified in structural steel and welding as well as American Welding Society (AWS) certified as required by the California Building Code (CBC) and International Building Code (IBC). Nondestructive testing of welds and weldments are performed by American Society for Nondestructive Testing (ASNT), standard TC-1A certified level II operators.


Landslide Studies and Stabilization Measures

Landslides can wreak havoc in many areas throughout California. CGI Technical Services’s professionals have extensive experience performing landslide evaluations to estimate stability and methods to stabilize failures.


Engineering Geology

CGi Technical Services, has extensive experience providing engineering geological services for a wide variety of projects throughout California southern Oregon, and Nevada. These services have been applied to municipal, governmental, energy-related, commercial, industrial, educational, recreational, and transportation-related projects.

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Pavement Design Services

 In recent years, we have performed more asphalt mix designs than any other laboratory in California, and we provide all necessary asphaltic concrete tests in our full service, accredited soils and materials laboratory. CGi Technical Services professionals also provide all necessary services for the design and testing for concrete and alternative paving materials.

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Geologic Hazards Evaluation

Geologic hazards can adversely affect almost any development or project unless they are identified and addressed in the planning and design stages.


Construction Materials Testing

We maintain one of the largest fully accredited geotechnical soils and construction materials laboratory between Sacramento and Eugene Oregon, and our personnel are fully certified and experienced to address all of your construction materials testing needs. 


Seismic Hazard Assessments

Professionals at CGi Technical Services have provided seismic hazard assessment services on a wide variety of projects throughout California, southern Oregon, and abroad. 


Geophysical Investigations

CGi Technical Service's personnel have worked with a wide verity of geophysical specialists to evaluate numerous subsurface conditions.