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We provide comprehensive industrial, commercial, and residential subsurface solutions to help you build, renovate, and excavate with confidence.


Our team of experts and service technicians provide a full suite of state-of-the-art utility locating services, designed to help your team avoid accidental underground strikes that can result in costly repairs, severe injury and time.

Unlike the 811 system, Utility Locator, LLC can locate existing utilities inside a building. Whether you need to core though multiple floors, or need to saw cut a trench in the basement / ground floor level, our team of skilled utility locators

In addition to the on-site communication received from our Project Managers, our clients receive filed markings in the form of paint, pin flags, stakes or any other method as directed by the client. Our PMs are trained to make all of their field markings to be clear.

At On The Mark Locators, we deliver professional Private Utility Locating Services that help engineers, utility providers, property owners, and government agencies reduce risk, prevent costly damages, and keep projects moving forward.

On The Mark Locators provides comprehensive Subsurface Utility Engineering (SUE) Services to reduce risk, eliminate utility conflicts, and support informed design and construction decisions.

On The Mark Locators provides professional Utility Mapping & CAD Deliverables that transform verified subsurface data into clear, actionable documentation for design, construction.

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.

On The Mark Locators provides reliable Utility Locating for Municipalities, helping cities, towns, and public agencies identify underground utilities with accuracy, compliance, and confidence. Our services support engineers, utilities, and owners across MD, PA, DE, NJ, DC, and VA, reducing risk, preventing utility strikes, and protecting public investments.

gpr concrete scanning

gpr concrete scanning

gpr concrete scanning

gpr concrete scanning

gpr concrete scanning

gpr concrete scanning
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