EM and GPR locating in Malvern, Exton, West Chester, Phoenixville, Kennett Square and across Chester County.
Trinity Subsurface locates private underground utilities for contractors, engineers and facility owners across Chester County, from Malvern, Exton and West Chester to Phoenixville, Downingtown, Coatesville and Kennett Square. Our technicians find the electric, water, gas, storm, sewer and communication lines that PA One Call does not mark, using electromagnetic (EM) equipment and ground penetrating radar (GPR), mark them in paint and flags, and deliver a field sketch within 24 hours.
PA One Call (811) notifies utility owners, but they mark only their own lines, usually up to the meter or property line. Chester County mixes corporate campuses along Route 202, fast-growing residential and mixed-use development, and farmland and mushroom-growing operations around Kennett Square. Behind the meter, those sites carry private electric and site lighting, irrigation, private wells and septic, and old farm services that never made it onto a drawing. They are private, and only a private locator will mark them.
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.
No. Utility owners mark their own facilities, usually up to the meter or property line. Private wells, septic systems, site lighting and lines between buildings belong to the property owner and need a private locator.
Most requests are on site within three business days, often sooner. Call (610) 492-6262 and the scheduling team will tell you what is possible.
All of Chester County, including West Chester, Malvern, Exton, Phoenixville, Downingtown, Coatesville, Kennett Square, Oxford and Chadds Ford, plus neighboring Delaware and Montgomery counties and northern Delaware.
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
