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Donaldson Garrett & Associates Donaldson Garrett & Associates
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35 Years
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Emergency
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Expert Land Surveying Services in Macon, GA
Donaldson Garrett & Associates, Inc. (DG&A) is a leading consulting firm specializing in land surveying and site design services. Headquartered in Macon, GA, with a branch in Charlotte, NC, we serve public and private clients across diverse industries, including environmental engineering, utilities, federal agencies, and commercial development. With nearly four decades of experience, our team of 20 professionals, registered in 11 states, delivers technical excellence through innovative solutions tailored to client needs.

Our services span hazardous site surveying, GPS applications, construction stakeout, and forensic litigation support, supported by state-of-the-art technology and a commitment to safety and quality. We integrate client-focused philosophy with operational excellence, ensuring projects meet compliance standards while minimizing costs and environmental impact. Our OSHA-certified crews and specialized programs for government agencies reflect our dedication to addressing complex challenges with precision and reliability.
Services
Land Surveying Construction Stakeout Hazardous Site Surveying GPS Services Mine Surveying Optical Tooling Boundary Surveys Drone/LIDAR Surveying Forensic Litigation Support Utility Easement Surveys
Details
  • Year established: 1991
Highlights and features
  • We offer OSHA-certified hazardous waste site survey crews with nationwide experience.
  • Our team includes surveyors registered in 11 states with expertise in diverse industries.
  • We utilize cutting-edge GPS and LIDAR technology for high-precision data collection.
  • We provide integrated services from concept to construction with a client-centered focus.
  • Our commitment to quality includes annual safety training and adherence to MSHA standards.
Update Listing
Services
Hazardous Site Surveying
Our OSHA-certified crews conduct hazardous waste site surveys for remediation projects nationwide. We provide precise mapping, excavation quantity determination, and monitoring well location layout using GPS and advanced data collection tools. Our team ensures compliance with safety protocols and delivers real-time data for efficient decision-making in high-risk environments.
Global Positioning System Services
We utilize NAVSTAR satellite technology to establish geodetic coordinates and state plane coordinates with sub-centimeter accuracy. Our GPS services accelerate data collection for mining, hazardous sites, and photogrammetric control, reducing project timelines while maintaining precision through real-time kinematic dual-frequency receivers.
Construction Stakeout
We deliver high-definition stakeout services for infrastructure projects including pipelines, airports, and commercial developments. Our surveyors collaborate with engineers and geotechnical firms to ensure precise alignment and compliance with client specifications across complex construction sites.
Drone/LIDAR Surveying
Our drone-based LIDAR systems capture detailed topographic data for large-scale land assessments. This technology enables rapid 3D modeling of terrain and structures, supporting applications in environmental monitoring, mining, and site planning with high-resolution accuracy.
Mine Surveying
We provide comprehensive surveying for surface and underground mining operations, including reserve assessment, subsidence monitoring, and royalty verification. Our services support safe and economical mining through precise mapping of mineral deposits and infrastructure.
People
Tommie Donaldson
Co-Founder
Co-founded DG&A in 1991 after serving on Georgia's State Board of Registration for Professional Engineers. His leadership established the firm's commitment to technical excellence and client-focused service across 11 states.
Jim Garrett
Co-Founder
Brought extensive engineering consulting experience from Top 500 ENR firms to co-found DG&A. His expertise in site development and environmental services shaped the company's integrated approach to surveying and design.
Phillip Brown
Vice President
Serves as Vice President of the Surveying and Mapping Society of Georgia. With over 20 years at DG&A, he oversees technical operations and ensures adherence to industry standards in all surveying disciplines.
Questions
What industries do you serve?
We serve environmental engineering firms, utility companies, federal agencies, commercial developers, and mining operations across the Southeastern U.S. and Central America.
Are your surveyors certified for hazardous environments?
Yes, our crews hold OSHA 40-hour HAZWOPER certification and specialized training for hazardous waste site surveying and remediation projects.
What technology do you use?
We employ GPS systems, robotic total stations, LIDAR drones, and optical tooling equipment to ensure precision in all surveying applications.
Can you handle large-scale infrastructure projects?
Yes, our team has extensive experience in pipeline, airport, and power plant projects requiring dedicated crews and fast-track execution.
Do you offer forensic surveying services?
Yes, we provide accident site mapping and courtroom-ready 3D visualizations for legal proceedings and litigation support.