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GPR Utility Locating
Advanced Subsurface Detection for Safer, Smarter Projects
On The Mark Locators provides professional GPR Utility Locating services to accurately detect underground utilities where traditional methods fall short. Using advanced Ground Penetrating Radar (GPR) technology, we identify both metallic and non-metallic utilities with precision—helping engineers, utilities, and owners reduce risk and avoid costly surprises.
Who Our GPR Utility Locating Services Are For
Our GPR Utility Locating services are ideal for:
Engineers & Design Professionals
Utility Owners & Operators
Facility Owners & Developers
Construction Managers & Contractors
Municipal & Government Agencies
When accuracy matters and subsurface conditions are complex, On The Mark Locators delivers the confidence you need to move forward.
What Is GPR Utility Locating?
EM Receiver / Transmitter
Ground Penetrating Radar (GPR) uses high-frequency radar signals to image subsurface features without excavation. Unlike electromagnetic (EM) locating, GPR can detect:
Non-metallic utilities (PVC, concrete, HDPE)
Unknown or undocumented infrastructure
Voids, anomalies, and buried structures
Utilities beneath concrete, asphalt, and slabs
GPR is often combined with Private Utility Locating Services and Subsurface Utility Engineering (SUE) Services to provide a complete subsurface picture.
GPR and ASCE 38 Utility Quality Levels (QL-D → QL-A)
Our GPR Utility Locating services support compliance with ASCE 38 Utility Quality Levels, ensuring reliable and defensible data.
QL-D – Records research to guide GPR investigations
QL-C – Correlation of surface features with GPR results
QL-B – GPR detection of subsurface utilities and anomalies
QL-A – Targeted test holes (when required) to verify GPR findings
This approach is critical for Transportation Agencies, Aviation & Airports, and Municipal Governments requiring ASCE-compliant utility data.
Industries We Serve
Our GPR Utility Locating services support a wide range of infrastructure sectors:
Aviation & Airports – Runways, terminals, and airfield utilities
Water & Wastewater Utilities – Treatment plants and pipelines
Transportation Agencies – Roadways, bridges, rail, and transit corridors
Higher Education – Campus utility investigations and expansions
Industrial & Manufacturing – Process piping and facility infrastructure
Municipal Governments – Public works and capital projects
Why Choose On The Mark Locators for GPR?
Advanced GPR technology and experienced technicians
Advanced GPR technology and experienced technicians
Integration with SUE and private utility locating services
ASCE 38-aligned workflows
CAD and GIS-ready deliverables
Regional expertise across MD, PA, DE, NJ, DC, and VA
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