GPRS Jacksonville Locates Voids at Port and Utilities along Riverwalk


Ground Penetrating Radar Systems’ Jacksonville Florida office was recently contacted to locate utilities near downtown Jacksonville.  The client was working on a property near the Riverwalk area and was installing new communication lines.  They wanted to avoid damaging any utilities running to the number of restaurants and condo buildings along the south side of the St. Johns River so GPRS was contracted to complete private utility locates. The proposed trench and directional bore path was scanned using GPR and radio detection devices. All utilities were painted and flagged directly on the ground surfaces.  Following the investigation all of the findings were collected using a GPS Trimble device to collect the locations of each of the items. Water, gas, electrical, conduit, communication, fiber optics, natural gas and other unknown utilities were all found in the area. Each location was collected and placed into an aerial map and later inserted into a CAD file.

The client was able to use the markings in the field and the mapping services following the investigation to safely and timely install the new utilities and avoid damaging any live utilities already in operation.  If you would like a similar locate completed or a quote for your project requiring GPR, please visit the “contact us” page at  In the image below you can see GPRS technician Adam Yunker scanning with his 400 MHz antenna along the Riverwalk area in downtown Jacksonville.

GPRS New York Office Locates Utilities at the World Trade Center


Ground Penetrating Radar Systems, Inc. was contacted by a contractor that needed to know the location of utilities prior to excavation earlier this month. The client’s primary concern was to identify any utilities or other subsurface items within the excavation area prior to digging so they could take appropriate measures in either relocating the utility or their excavation area. The project consisted of clearing three 20’ X 20’ areas to allow them to excavate down 25’ and tie into an existing walkway tunnel. Utilizing the latest in GPR technology and Radio Detection, Joe Bernarducci of the New York City Office of GPRS responded to the site and was able to mark out several utilities traveling through the proposed areas. With the utilization of GPR on this project it gave the client a way to identify any utilities or other subsurface obstructions in the area in a nondestructive, safe manner. All of the utilities that were located were then marked directly onto the service in real time while GPRS was on site. The use of ground penetrating radar allowed the client to stay safe while digging and helped to keep them on their tight completion schedule. With the professional services provided by GPRS, no utilities were struck during the excavation of the three areas allowing the client to stay safe on this project.

If you have a project in the New York or New Jersey area and you need to locate utilities or subsurface obstructions or need to locate items embedded in concrete such as rebar, post tension cables or conduits please contact the NY/NJ Office for a free estimate. If you need more information or need a cost proposal for your next project please contact, Joe Bernarducci at 848-223-5084 or

We are dedicated to helping our clients solve problems and answer questions during your preplanning phases as well, if you need to learn more about how GPR works or have questions about an upcoming project contact Market Manager Rhett Teller at 646-765-5599 or

GPR Scanning to Locate Reinforcing at a Private Classic Car Museum

Ground Penetrating Radar Systems, Inc. was recently contacted to locate slab reinforcing and various other possible anomalies in several areas at a private car museum located in Fort Worth, TX. The contractors were theorizing numerous possible changes, additions, and improvements to the property at the behest of the owner. Said contractors needed to know details about the slab, including thickness, reinforcing layout, reinforcing size, and if any other unexpected anomalies were present in or under the slab.


Gasten Schoonover with Ground Penetrating Radar Systems, Inc., was contracted to scan the areas the contractors were interested making changes in and provided much needed information to move their project along at an expedited pace. Gasten Schoonover, using Ground Penetrating Radar and Radio Detection equipment, was able to accurately mark out all in-slab reinforcing, and provide information on the slab depth, reinforcing diameter and spacing, as well as locate several unexpected anomalies, saving the contractors future time, money, and headaches . Due to Ground Penetrating Radar Systems, Inc.’s quick response, rapid turnaround, quality of work, and industry-leading technology, we were able to ensure no disruptions were encountered and a quick start to the changes, planning, and installations for the contractors on site, and the owner of the property.

Ground Penetrating Radar and Radio Detection equipment is cost effective, non-hazardous, and provides accurate data in real time. GPRS can also provide detailed reports, GPS layouts, AutoCAD and many other services.  Ground Penetrating Radar Systems, Inc. is the nation’s largest company specializing in the detection of underground utilities and the scanning of concrete structures,  has been in business for over 15 years, and has performed concrete scanning, void detection, UST locating, and underground utility locating projects for over 30,000 customers throughout the United States, the Caribbean, and Canada. Ground Penetrating Radar Systems, Inc. uses industry-leading equipment, provides industry-leading results, and keeps your projects on time.

For service in the North Texas or surrounding areas, or a quick quote, please contact Project Manager Gasten Schoonover at (817) 757-9527 or email

GPRS Locates Everything – in a concrete slab – at The University of Utah Hospital

Ground Penetrating Radar Systems, Inc. (GPRS) was contracted to locate everything in a concrete slab at The University of Utah hospital, located in Salt Lake City, Utah. The contractor had no idea what was in this slab due to the fact that it was over 50 years old. GPRS was hired to mark all findings in order for them to core drill for remodeling. Recently, The University of Utah made the smart decision to make this mandatory due to the lack of knowledge about the slabs and wanting to ensure safety.

Ground Penetrating Radar Systems, Inc. has a few different tools that could be used to locate, potentially anything, within a concrete slab. GPRS used the 1600MHz antenna on this project; the 1600 is our standard piece of equipment. We also used a smaller antenna called “The Palm”, this antenna helps us get into smaller areas and allows us to get to areas that are just too tight for the larger 1600MHz antenna. Finally, GPRS always has a Radio Detection wand handy for all jobs. The Radio Detection wand is a way to double check that there is no power running through the slab.

At the University of Utah hospital, we were able to locate all the reinforcement within the slab so that they could core drill safely. The University was glad that they did not have to clear out the area, like they would have to have done if they used x-ray. This University hospital could not have the area cleared out, but wanted to make sure that the work was done safely as well. GPRS was able to ensure that both were done. Radar is safe to be around, and the job was done without the core driller hitting anything within the slab.


GPRS does much more than concrete scanning. We also do utility locating, underground storage tank (UST) locating, and we can even find voids. If you need work done safely, it is our job to make sure you don’t hit anything while drilling, cutting or digging. If you need work done in Utah, Idaho, Montana or Wyoming, please Contact Cooper Cox, Project Manager at (801) 419-7031 or

Concrete Scanning at the Hoover Dam in Las Vegas, NV

Opening in 1933, the Hoover Dam has been one of America’s most iconic landmarks for over 80 years. This dam not only helps form Lake Mead, the largest reservoir in the world, but it also is a great source for hydroelectric power in the southwest. Without it, cities like Los Angeles, Las Vegas, and Phoenix would most likely not be the thriving metropolis’ they are today. Due to the dam’s age and incredible importance in keeping the west watered, some upgrades were inevitably going to be needed. Recently, a company who was hired to take care of some of these routine maintenance issues needed concrete scanning done.


Ground Penetrating Radar Systems was called to scan multiple areas prior to drilling into the concrete for anchor bolts for the extremely heavy equipment that was going to be installed. The scanning done by GPRS allowed the customer to confidently drill without hitting the reinforcement in the 30 inch concrete slabs. GPRS used a 1600 mHz antenna with the ground penetrating radar to scan the areas. All of the findings were clearly marked on the surface with permanent marker and discussed with the customer before drilling began. Had they not wanted permanent markings, GPRS is always ready to mark findings on concrete using crayon or tape instead. Whether working on an older historic landmark, or a freshly built hospital and everything inbetween, Ground Penetrating Radar Systems can help.

Prior to saw cutting, core drilling, excavating or boring in the Las Vegas and Southern Nevada areas, be safe & get as many questions answered as to what sub-surface obstructions are present. Pretty much, if you have questions about what lies beneath whatever surface you’re working on, GPRS should be able to give you a much clearer picture as to what you are dealing with. Typically able to arrive on site to begin scanning within 1-2 days, GPRS will take care of your project in a timely, safe, and accurate manner. Contact the Las Vegas GPRS Project Manager, Andrew Yates, at 702-573-9228 or


GPRS Identifies Critical Targets at General Mitchell International Airport

general-mitchell-international-airportGround Penetrating Radar Systems, Inc. – GPRS – of Wisconsin was contacted by general contractor to scan areas for new plumbing at a General Mitchell International Airport. The airport is adding a Starbucks Coffee to its line of stores and restaurants within the terminal for travelers. New plumbing needed to be added to accommodate equipment and layout. GPRS was asked to scan areas for potential conduits in the active store as well general-mitchell-international-airport-2as provide information about the elevated slab. GPRS identified portions of the slab to be precast hollow core as well as areas of Twin-T slab. GPRS was able to identify the critical targets and advise the contractor safe places to cut/core. GPRS was able to clear the cores/cuts and identify the critical targets. This led to the project staying on budget, on time, and safe.

Ground penetrating radar is a great tool to scan areas of post tension cables, rebar, and conduits, including PVC pipes and can also be used to locate underground utilities prior to digging or excavating. For GPR needs in Milwaukee, Racine, Kenosha, Green Bay, Fond du Lac, Sun Prairie, Madison, Middleton, Monroe, Stevens Point, Eau Claire or anywhere else in the state not listed, contact your local GPR Expert.

GPRS’s Wisconsin Expert:
Christopher A. Geary at 414-795-6845 or send him an email at

Scanning 1.5 acres in Knoxville, TN at University of Tennessee Medical Center


The GPRS East Tennessee office was subcontracted by an engineering firm out of Knoxville, TN to scan approximately 1.5 acres in Knoxville, TN at University of Tennessee Medical Center.  The firm was interested in collecting soil samples for analysis.  UT Medical Center was interested in expanding their chiller capacity, which is currently stationed on a roof top.  There were 6 locations that needed to be scanned in the rear parking lot with ground penetrating radar so that underground utilities would not be struck when the drilling took place.  The GPRS representative used a GSSI 400 MHz antenna and a radio detection wand to scan these 6 locations over multiple surfaces and terrain conditions.  Each location to be drilled was scanned in a 10’x10’ radius, and bordered with white paint on the surface so the drilling contractors could better understand the exact boundaries of each area scanned with ground penetrating radar.  There were multiple utilities and areas of interest found on this site, and upon location, each utility and area of interest was marked on the surface with paint indicating what type of utility was encountered.  Depths were provided if located with ground penetrating radar.  All findings were reviewed with the site contact after the ground penetrating radar inspection and any locations that had to be moved due to utilities in the direct path were communicated with the site contact.  Details of the inspection were also reviewed with onsite personnel so that they could update their site drawings for their records.

The 400 MHz transmits an electromagnetic pulse through the ground and displays the reflection on a SIR 3000 head unit for interpretation.  This antenna allows for ground penetrating radar signal penetration of 4’-7’ through the ground in the southeast region of the United States.  Radio Detection RD-7000 locator is a device that detects live power and RF signals underground, allowing us to locate electrical or telephone lines even if they are below the minimum size requirements to be detected by ground penetrating radar.  It also allows us to detect utilities via frequency induction or conduction with an exposed or known surface of the conductive utility.

For more information on how GPRS can assist you with your locating needs, please contact: Ryan Catlett at 865-206-7639 or

GPRS Locates Underground Utilities at the Cleveland Clinic – Lyndhurst, Ohio Campus

Ground Penetrating Radar Systems was recently called out to a project in Lyndhurst, Ohio. The scope of work was to locate any underground utilities throughout the roadway from the main entrance to the main building. By using GPR and Radio Detection, many utilities were located with depth indications to prevent utilities from getting hit. The contractor needed to put in a new roadway and needed to know what utilities were in the area. Electrical conduits would have been hit during excavation if they were not marked with depth indications. GPR and Radio Detection is an accurate and effective way of locating underground utilities, underground storage tanks, and voids. The pictures below show some of the many utilities located on site.



For more information on how GPRS, Inc. can help you on your next project, please contact Micah Stair at 330-639-8933 or by email at  We also have the capabilities of locating conduits, rebar, and post tension cables in a concrete slab.

24 Miles । 6 Months । 0 Incidents

24 Miles, 6 Months, 0 Incidents on a Utility Locating Project at the GM Technical Center

GPRS Partnered with a local contractor and GM in the early spring of 2016 for a huge project at the GM technical center in Warren, MI, a suburb of Detroit. The contractor was heading up the project which consisted of 6 zones and lasted for six months. The purpose of the project was to upgrade the entire campus site lighting. To put this task into perspective, the GM tech center (WTC) is a 4 square mile facility with 19 miles of roads and 25 miles of sidewalks. The project was divided into 6 zones which were 4 miles each and had an average of 20,000 feet of wire feeding the new site lighting. This facility employs over 21,000 people and on any given day approximately 30,000 workers and visitors go through the gates of the GM Technical Center.

GPRS was able to successfully locate and mark all utilities and the project was completed with 0 incidents and was actually completed ahead of schedule. Prior to this project, the contractor hired a landscaping company to do a small sprinkler repair. They hand dug down to the sprinkler main and cut the wrong line which was the new site lighting circuit that carries 480 volts of power. GM has since rewritten their policies and procedures regarding excavation. They brought in GPRS to do an extensive demonstration about our services and the need for GPR. The policy now requires all contractors who are excavating more than 4 inches to locate all utilities using GPR. GPRS is now their first choice because they have confidence knowing that their project will be safe, on budget, and in this case, ahead of schedule.

For more information, to request a quote or to schedule GPRS for your next project, contact Mike Garcia at 586.395.9231 or  For a complete listing of our nationwide locations, visit