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Foundations are the fundamental base of everything we build. Whether you’re designing and building a landfill, a roadway, a house, or a skyscraper, the integrity, strength and stability of the foundation is a critical factor.

CATLIN’s in-house certified well drillers, fleet of drilling rigs and support vehicles, and soil laboratory allow us to provide full range of geotechnical subsurface investigations, site characterization, testing, and engineering.

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Subsurface Investigation

From subsurface investigation to laboratory testing and engineering design – CATLIN can provide comprehensive geotechnical services including:

Full service drilling capabilities including but not limited to:

  • Direct Push Technology

  • Auger

  • Mud Rotary

  • Air Rotary

  • Rock Coring

In-situ soil testing via:

  • Standard Penetration Testing (SPT)

  • Cone Penetrometer Testing (CPT)

  • Flat Dilatometer Testing (DMT)

  • Dynamic Cone Penetrometer (DCP)

Drilling & Field Services

CATLIN’s In-House Equipment includes:

  • Rotary Drills (skid, trailer, rubber-tire ATV, and track mount)

  • Direct Push Technology (truck and track mount)

  • Cone Penetration Testing (track mount)

  • Vibracore Sampling System

  • Water borne and amphibious capabilities additionally available

In-situ soil testing via:

  • Standard Penetration Testing (SPT)

  • Cone Penetrometer Testing (CPT)

  • Flat Dilatometer Testing (DMT)

  • Dynamic Cone Penetrometer (DCP)


Field Geologists to oversee drilling activities

Geotechnical Engineering

CATLIN’s Geotechnical Engineering Services for the investigation, analysis, design, and review of shallow and deep foundations, piles, drilled shafts, retaining structures, roadways, bridges, buildings, site development, and other similar or more complex analyses include:

  • Shallow Foundation Analyses (Bearing Capacity, Settlement)

  • Deep Foundation Analyses (Lateral, Axial and Uplift Capacities for Driven Piles and Drilled Shafts)

  • LRFD Design Methods

  • Wave Equation (GRLWEAP) Analyses for Driven Piles

  • Slope Stability & Retaining Structure Design

  • Pavement Analysis & Design

  • Earthwork and Foundation Construction Recommendations

  • Site Development Feasibility Studies

  • Geologic Reconnaissance

  • Ground Improvement Recommendations

  • Groundwater and Drainage Control

Soil Laboratory

CATLIN’s In-House Geotechnical Laboratory supports our engineering services for the evaluation of soil integrity. Our laboratory is located in Wilmington, NC and is certified by the North Carolina Department of Transportation (NCDOT).

We use ASTM and AASHTO methods to complete the following tests:

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  • Visual Classification

  • Particle Size Analysis with Hydrometer

  • Grain Size Analysis

  • Wash 200 Sieve Analysis

  • Standard Proctor

  • Modified Proctor

  • California Bearing Ratio (CBR)

  • Specific Gravity

  • Moisture Content

  • Liquid Limit, Plastic Limit, Plasticity Index (Atterberg Limits)

  • Hydraulic Conductivity (Triaxial Flexible Wall Permeability)

  • Permeability of Granular Soils

  • Bulk Density & Porosity Determination

  • Organic Content



Certified Soil Laboratory - AASHTO, USACE, NCDOT
NCDEQ Division of Water Resources Field Parameters Certification

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