Geotechnical Design

CDG’s full range of geotechnical services ensure timely, cost-effective and expert design solutions from conception through project completion. Our geotechnical expertise is built on integrating advanced geoscience technologies with the physical environment. CDG’s experienced designers specialize in conventional and innovative geotechnical procedures for foundation design, ground improvement and stabilization, and earth retention structures. CDG maintains a large fleet of in-house drilling equipment including both truck-mounted drills and a skid-steer mounted Geoprobe to successfully achieve demanding project schedules.

• Stabilization of soft and expansive soils
• Foundation solutions for all loading and subsurface conditions
• Settlement analysis and mitigation techniques
• Slope design and stability analysis for conventional and steepened embankments
• Rigid and flexible pavement design
• Earthen dam design and safety analysis
• Sinkhole identification and remediation
• Geosynthetic reinforced wall design
• Groundwater collection and removal systems
• Structure distress evaluation, remediation and expert witness testimony

Construction Materials Testing

Construction materials testing is an essential element of the construction process to ensure adherence to project plans and specifications. CDG’s experienced staff of engineers and testing technicians are trained to identify non-compliant elements, communicate effectively with the project team, and offer creative solutions to promote project success. The CDG Materials Testing Laboratory maintains a quality assurance program outlined in our Quality Assurance Manual and is accredited by the American Association of State Highway and Transportation Officials (AASHTO), the US Army Corps of Engineers, and the Alabama Department of Transportation (ALDOT). Multiple laboratory locations allow us to provide timely and efficient testing service to our clients.

• Verification of appropriate earthwork procedures
• Laboratory testing of soil and aggregate
• Density testing of compacted fill materials
• Evaluation of foundation bearing conditions including full-scale load tests
• Sampling and testing of structural concrete, grout and mortar
• Inspection of structural steel bolted and welded connections
• Asphalt sampling and testing including batch plant inspections
• Specialty testing such as sprayed fire-resistant materials and vapor emission testing
• Special inspections in compliance with International Building Code (IBC) requirements