Locating Private Utilities in Carlisle, Pennsylvania

A general contractor based out of the York area recently contacted the Ground Penetrating Radar Systems (GPRS), Harrisburg office. The scope of work for their project was to detect underground utilities in a 50’ x 50’ area prior to installing a concrete foundation. The scope also included checking for underground utilities prior to installing 300’ of conduit as well as 1000’ of excavation to replace a 12” Process Waste line. This project took place at a facility in Carlisle, PA.

GPRS provided two project managers on site due to this being a time sensitive project. Upon arrival, GPRS Project Manager Jesse Whitman performed a site walk with the on site personnel while Project Manager Mike Folkenroth set up the equipment and went over the Job Hazard Analysis. After the site walk concluded, Jesse had noticed multiple above ground features that needed to be located. This included conduits, water valves, cleanouts, gas tracer wires, process waste lines as well as site lighting.

The first mode of action that GPRS took , was to utilize the EM locator. GPRS first used the clamp to induce a signal on the target pipe or conduit and trace them out. This was very helpful because the area was very congested with utilities and it helped to identify each conduit/pipe in the area. GPRS then used the direct connection method using the EM pipe detector. This was very helpful to locate the gas by connecting to the tracer wire and the fire line by connecting to the fire hydrant. GPRS also used this method to locate various other pipes. Next, the PM’s used a combination of methods to locate pipes that may not have any surface features. The next step GPRS took was to scan, using a 400MHz ground penetrating radar antenna. The 400MHz antenna is designed to locate underground utilities and other subsurface anomalies. Using this technology, GPRS was able to identify the depths of the existing utility lines and conduits that were previously detected using the EM locator. All of the findings were marked according to the painted color code which has been established by 811. Lastly, all of the utility line’s locations were collected using our GEODE (GPS) device. Collecting these locations, allows GPRS to create deliverables such as non-survey grade, Google Earth overlays or CAD drawings. Not only is this important to your current project, these drawings can be kept as records for future use.

All GPRS Project Managers are highly skilled and trained in the field of concrete scanning and utility locating. However, it does not stop there, as we have helped numerous clients identify underground storage tanks (USTs), footings, and identify voids on site.

As a nationwide company, we cover all 50 states. Our 24 hours rapid response program guarantees that your project will get covered within a 24-hour window of your call, text, or email.

For questions or quotes on any subsurface locating with fast response times and easy scheduling, please contact:

Sam Hart – Area Manager

717-798-5721 or

GPRS has a nationwide presence! Please visit the contact page on our website ( to find a project manager closest to you.

GPRS does not provide geophysical, geological, land surveying or engineering services. If you need such services, please contact an appropriate professional.