Need to investigate what's underneath the surface? Our team provides full utility locating services in the state of Maryland to protect you, your team, and your site.

Our team can provide quick turnaround as-needed for your projects, from our cost-free estimates to fast field service and deliverable turnaround.
Find out what sets Trinity Subsurface above and beyond for high-quality subsurface investigations throughout all of Maryland, including Baltimore, Columbia, Elkton, Frederick, and Germantown. With a full suite of services covering variety of technologies and methods, we'll build ongoing relationships to investigate your current and upcoming projects for what's underneath.
Our team relies on a variety of technologies and methods to fully examine your site. We use electromagnetic scanning, ground penetrating radar and more to get the best info on subsurface utilities and underground infrastructure.
Our team offers multiple services to support your projects on top of utility locating and concrete scanning. Ask us about additional utility investigation services we can offer for further support beyond GPR locating and scanning.
We aim to provide ongoing support for your current and upcoming projects. Whether you're just starting design or running into unexpected utilities during construction, we'll investigate and assist with any step of your project.



Our technicians cover Baltimore City and Baltimore County, Anne Arundel and Annapolis, Howard County and Columbia, Montgomery County, Harford and Cecil counties including Bel Air, Perryville and Elkton, and the Eastern Shore from the Bay Bridge to Salisbury, Princess Anne and Ocean City.
Trinity is led by Greg Finkle, P.E., a professional engineer licensed in Maryland, Delaware, Pennsylvania and Florida. Rated 4.9 out of 5 from 223 Google reviews.
Rated 4.9 out of 5 from 223 Google reviews.
“Trinity Subsurface has been spot on every time they are on site. They are punctual and always keep us informed when on site.”
John O., Google review
“They were thorough, professional, and they really worked hard. They made sure I completely understood what was done.”
Adam D., Google review
“The crew did a perfect job. Exactly what I needed, right on time, very friendly and courteous. Very happy!!”
Chuck B., Google review
Local service details for the areas we cover most often: