Our Services

Professional Geotechnical and Geologic Consulting

We deliver concise, expert solutions for complex engineering and consulting needs across healthcare, public works, and education sectors.

Geotechnical Engineering

Foundation design, shoring, earthquake engineering, and seismic ground motion studies.

Geological Studies

Geologic mapping, fault studies, seismic hazard assessments, geohazard evaluations.

Construction Observation & Testing

Certified compaction testing, footing inspections, and observation for piles, caissons, and ground anchors.

Specialized Monitoring and Instrumentation

Specialized Monitoring & Instrumentation

Vibration monitoring, geotechnical instrumentation (inclinometers/piezometers), pile integrity testing.

Laboratory & Environmental Services

AASHTO, DSA, and City of LA accredited soil, aggregate, and asphalt testing; environmental impact and environmental impact reports.

Specialized Technical Capabilities for Every Project Phase

Design & Investigation Phase

Design & Investigation Phase

We provide the data and analysis necessary to secure a stable project foundation.

Investigation: Borrow site evaluation, liquefaction and lateral spread analysis, and rock mass characterization.
Design: Alternate foundation analysis, ground improvement studies, and design for earth-retaining structures.
Environmental: Site feasibility studies, dewatering studies, and groundwater evaluations.

Construction Quality Control

Our field services ensure that construction meets every technical specification.

Testing: Field compaction testing, laboratory material testing, and asphalt concrete pavement oversight.
Shoring & Excavation: Observation of soldier pile and lagging, braced excavation, and sheet pile installation.
Specialty Foundations: Integrity testing of piles and oversight for stone columns, soil cement mixing, and deep dynamic compaction.

Forensics & Expert Consultation

Forensics & Expert Consultation

TGR provides high-level proficiency for specialized engineering needs.

Expert Witness Services: Professional testimony and forensic studies for geotechnical and geological failures.
Geophysical Surveys: Advanced subsurface imaging and site characterization.

Capabilities and Services

GEOTECHNICAL ENGINEERING

Geotechnical Investigation
Foundation Design
Temporary and Permanent Shoring
Seismic Ground Motion Study
Earthquake Engineering
Ground Improvement Studies
Earth Retaining Structures
Landslide / Slope Stability
Forensic Studies
Expert Witness Services
Geotechnical Instrumentation
Borrow Site Evaluation
Alternate Foundation Analysis
Excavation and Dewatering
Pile Drivability & Capacity Analysis
Liquefaction & Lateral Spread Analysis

GEOLOGICAL STUDIES

Geologic Mapping
Fault Studies
Rippability Studies
Geologic Hazard Evaluation
Feasibility Studies
Forensic Evaluation
Landslide Evaluation
Seismic Hazard Assessment
Hydrogeologic Evaluation
Environmental Impact Reports
Rock Mass Characterization
Aerial Photograph Reviews
Groundwater Studies
Dewatering Studies

GEOTECHNICAL OBSERVATION

Compaction Testing
Retaining Wall and Trench Backfill Observation
Shallow and Mat Foundation Observation
Piles, Caissons, and Geopiers
Stone Columns and Soil Cement Mixing
Tie-Backs, Soil Nails, and Ground Anchors
Soldier Pile and Lagging
Braced Excavation and Sheet Pile Systems
Grouting Observation
Inclinometers and Extensometers
Piezometers and Strain Gauges
Segmental Retaining Walls
Deep Dynamic Compaction
Integrity Testing of Piles
Vibration Monitoring
Asphalt Concrete Pavement Observation
Gamma Gamma & CSL Logging

OTHER SERVICES

Geophysical Services
Environmental Services
Soil, Aggregate & Asphalt Laboratory Testing
Material Testing Services
Special Inspection Services

Reliable Engineering Support With Fast Turnaround

Whether you are in the initial land acquisition phase or need expert construction quality control, our team of professionals is ready to deliver technical proficiency with a quick turnaround time.

Discuss Your Requirements