Underground Location Experts
Public - Private - Everything
For over 15 years GPR OneCall has been a tristate leader in locating ALL types of buried underground utilities and structures. Using an arsenal of the industries most advanced locating equipment along with state of the art techniques, training and experience; we locate underground utilities that others might over look. Unlike an 811 mark out that only include public service utilities, we locate everything underground; from sewer lines to steam and everything in between, rest assured knowing you are covered.
We specialize in detailing ALL underground utilities at a site, no matter the complexity, and delivering the information on site with paint, flags, and to you in the form of detailed reports and maps.
In addition to conventional locating practices, our experience has helped us develop industry unique procedures and techniques that give us the confidence to know everything that is underground.
Our Utility Locating Services Include:

Full Site Locate and Mapping

Boring and Excavation Clearing

Specific Utility Investigation

Lost Utility or Structure Discovery
More Than Just GPR
Ground penetrating radar is one of our most important tools but in delivering the most thorough possible results we utilize numerous other subsurface technologies and locating techniques at every job site to get the most comprehensive results.

Ground Penetrating Radar (GPR)

Electromagnetic (EM) Active Locating

Electromagnetic (EM) Passive Locating

Concrete Scanning
For more information on our concrete scanning, please click the link.

Duct Rod Tracing and Sond Locating

Push Camera and CCTV Video Inspection
Please click on the link for more information on this service.

Ferromagnetic Metal Detection

Experience
Types of Utilities Located:
All of Them
At a job site we use a combination of paint markings and flags to indicate the type of utilities located underground at the work site. The colors and symbols we use are based on the APWA Uniform Color Code for utilities and adjusted to fit a broader spectrum of utility types than what is referenced in this standard Color Code.
Electric
Water
Natural Gas, Petroleum, Fuel Oil, and Other Combustible Gases
Steam and Condensate
Oxygen, Nitrogen, and Other Specialty Gas or Compressed Liquid Lines
Communication Lines
Sewer
Storm
Unknown Potential Utility
Our Deliverables
Information is only useful if its conveyed properly, that is why we have a variety of delivery methods; so you can access the information in a clear and concise way, exactly how you need it.

Field Markout

Field Service Report

Field Pictures

Field Utility Map

KMZ and KML GPS Survey
According to the Common Ground Alliance Dirt Report for 2020 there were 385,381 utility incidents that resulted in $279.3 M in damages, 486 injuries and 8 deaths. While the largest percentage of why the incidents occurred was due to no mark-out request being made, 10.57 percent were caused by mis-marks and non-marks provided by the free public 811 services. A comprehensive, full utility investigation by technicians who are proficient and experienced in locating both private and public utilities provide a superior level of mark-out location and verification that will save you time, money and keep your workers safe.