Trinity Subsurface inspects storm, sewer and lateral lines across Maryland, from Baltimore and Annapolis to Montgomery County and the Eastern Shore, with robotic crawlers, push cameras and lateral launch systems. For gas and fiber installers, we inspect sewer laterals before and after directional drilling so a cross bore is found before anyone runs a cutter through it, and so nothing can be claimed against the installer later. Reports are NASSCO PACP, MACP and LACP coded, with pipe segments ranked by condition and consequence.

Gas and fiber contractors, engineers and property owners use our CCTV reports to decide which pipes need attention first. Because the same company jets, inspects and lines the pipe, there's no hand-off between contractors: the inspection that finds the problem becomes the baseline for the repair.
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.
Yes. Pre- and post-construction lateral inspection is one of our highest-volume services. We document each lateral before the bore and again after, so any cross bore is caught and the installer has a clean record. Most requests are on site within a week.
Often, yes. We clean the line with hydro jetting, then repair it with UV cured-in-place lining or a sectional point repair, without excavation.
Yes. Reports are coded to NASSCO PACP, MACP and LACP standards, with segments ranked by condition and consequence. Call (443) 779-6060.
Rated 4.9 out of 5 from 223 Google reviews.
“Third time working with Trinity. Expertise, determination to find the problem and solution, resulting project summaries all outstanding. Highly recommend Trinity!”
Nancy T., Google review
“Their quote was provided promptly, and the technician was punctual, professional, and well-prepared. The work was clearly explained throughout the process.”
Frank B., Google review
“Trinity Subsurface is consistent in their high level of service, responsiveness, and quality of work.”
Craig H., Google review