
Three Notch Group
Guidance. Expertise. Partnership.
About the firm
Three Notch Group (formerly CDG) is a regional civil, environmental, and geotechnical consulting firm headquartered in Andalusia, Alabama, serving public entities, private industry, and commercial developers throughout the Southeast since 1946. Three Notch Group provides civil and site development, environmental consulting, construction engineering and inspection, geotechnical services, water and wastewater infrastructure, transportation, solid waste management, natural gas system planning, UST services, surveying, and emergency response management.
- Established
- 1946
- Firm type
- Civil Engineering · Environmental Engineering · Geotechnical Engineering
Capabilities
Civil & Site Development
Site design, grading, and civil infrastructure engineering for commercial, industrial, and public projects.
- Site design
- Grading
- Civil infrastructure engineering
Environmental Consulting
Environmental assessment, regulatory permitting, and compliance leveraging strong regulatory relationships throughout the Southeast.
- Environmental assessment
- Regulatory permitting
- Compliance support
Construction Engineering & Inspection
Construction observation and materials testing using in-house AASHTO-accredited laboratories to verify project strength and durability.
Geotechnical Services
Comprehensive geotechnical investigation, analysis, and design integrating advanced geoscience technologies with environmental insights.
- Geotechnical investigation
- Geotechnical analysis
- Geotechnical design
Water & Wastewater Engineering
Water infrastructure and treatment system design and planning, and wastewater infrastructure and treatment solutions for municipalities.
Transportation
Sidewalk, roadway, intersection improvement, and transportation infrastructure design for the Southeast.
- Sidewalk design
- Roadway design
- Intersection improvements
- Transportation infrastructure design
Solid Waste Management
Planning, permitting, and operational consulting for solid waste management facilities.
- Solid waste planning
- Solid waste permitting
- Operational consulting
Natural Gas Services
Natural gas system planning, capacity analysis, and system growth support for utilities.
- System planning
- Capacity analysis
- System growth support
UST Services
Underground storage tank compliance, assessment, and remediation with strong knowledge of the regulatory environment.
- Underground storage tank compliance
- Underground storage tank assessment
- Underground storage tank remediation
Surveying
Land surveying and geospatial data collection, management, and analysis.
- Land surveying
- Geospatial data collection
- Geospatial data management and analysis
Emergency Response Management
Assessment, remediation, and support services for emergent situations across the Southeast, with more than three decades of experience.
- Emergency assessment
- Emergency remediation
- Emergency support services
Industries
Government · Environmental & Remediation · Water Supply · Wastewater · Transportation · Oil & Gas · Waste Management
Projects
No projects listed yet.