Clean Out Locating

It can be hard to foresee all situations and plan accordingly for each scenario when constructing new buildings. Subcontractors come and go and you can’t always keep an eye on what every person does on a job site. A plumbing contractor had installed all of the necessary plumbing lines and also installed cleanouts for future lines to be installed at a new warehouse in Orlando, FL. Little did they know that after they installed everything the concrete team would cover the cleanouts and pour concrete over them. The problem was that there was no way of their knowing where the cleanouts would be for future use. They had a good idea of where they were but finding multiple cleanouts in a large warehouse can be like finding a needle in a haystack.

Fortunately for this team, they knew about Ground Penetrating Radar Systems. GPRS is a team of professionals that specializes in locating subsurface elements. This was a unique project for the Orlando team, but when it comes to problem solving, GPRS shines. After a few conversations, it was decided that we could help their team find a solution to the problem.

After arriving onsite, the plumbers had access already set up for the GPRS professional to use a lone cleanout on the outside of the building. The GPRS professional pushed a 225 ft. fish tape all the way into the sewer line. The fish tape was then energized and they were able to follow that sewer line through the building using a radio detection wand. All 225 ft. of the sewer line was marked out with blue tape. Once the line was detected, they brought out the GSSI 1600 mhz antenna, which is used for scanning concrete to detect rebar, structural steel, post tension, electrical conduits and more. In this case they scanned directly on top of the previously marked sewer line and were able to clearly identify where the cleanouts were. They were able to locate all four missing cleanouts. Once the cleanouts were identified, the plumbing team was able to have them core drilled out and accessed for future use.

Below, you will see a picture below depicting Nate Schmoe, of GPRS, Inc. scanning for the sewer line with the radio detection wand. If you would like to receive a proposal for similar work please visit the “Contact-Us” page at


Communications Tower Relocation

communications towerWe at Ground Penetrating Radar Services were recently called out to a communications tower in central Florida.  Our customer was planning on replacing the existing tower with a new one, but the plan was to keep the tower from experiencing any service interruption through the transition.  The new tower was to be placed just a few feet away from the existing one.  Both the footer and the new tower’s anchors would have to be installed without hitting any of the utilities that serviced the existing tower.  Only after the new tower was up and running could the old lines be disconnected.  In order to accomplish this, our customer needed a precise mapping of all of the existing utilities in the immediate area.

After discussing the project with our customer’s on-site contact, we employed both a 350MHz radar antenna and a radio detection wand to investigate the property.  Of immediate concern were the communication/fiber lines that ran from the existing tower to the adjacent service building, and then left the property.  The service building also had power and gas lines that needed to be traced.  The communications lines that ran from the tower to the building were grouped into two bundles.  Both the 350Mhz antenna and the radio detection wand gave data allowing us to paint lines directly over the utilities.   The gas line ran directly from the building to a tank that was on the property, and the power was located in the back of the property.  Although there was no visual indication of water, sanitary, or storm lines in the area, the radar and radio detector were used to grid the entire plot in the event that any unsuspected anomalies ran beneath.  Each paint line was color coded so that the customer could expose the appropriate line when they were ready to be disconnected, but for the time being the plans for the new tower could be adjusted, if need be, to avoided interrupting service to the existing structure.

We specialize in providing our customers with the subsurface information they need to conduct their work safely and efficiently.  We accomplish this by using the best technology available, and by comprehensive and on-going training for our Project Managers.

Big Construction Projects Must Go Up!


Big construction projects must go up. They have big budgets and big teams and lots and lots of resources. A new resort is being constructed near Universal Studios and is going up and up. Eventually the resort will be a 16 story building with all the bells and whistles. The only thing about going up is that you need a way to get you there. The team working on the project decided to install a buck hoist to the side of the building to be able to move people and resources up and down the project. The problem they faced was a whole lot of post tension cables lying beneath the surface of the concrete they were drilling into. Most of the big construction teams in Orlando know to call GPRS or Ground Penetrating Radar Systems.

The GPRS professional arrived on-site and then walked the project area with the project superintendent. Before beginning the project, a safety assessment was made to ensure the safety of the GPRS employee. A safety harness was attached to a column to provide the support needed in case of a fall. A 50 foot length of floor was scanned on every floor within two feet of the edge of the concrete. The scan technician was able to identify the location of rebar and post tension cables. The cables were marked on the concrete with red spray paint so the workers drilling would know where not to drill when installing the buck hoist. After all of the floors had been scanned, the GPRS professional walked the site with the site contact to make sure nothing had been miscommunicated. Whether you are locating conduits, PT cables, rebar or other utilities, GPRS knows how to let you know what’s below. GPRS has years of experience with locating utilities, concrete analysis, UST locating, and void detection.

Below, you will see a picture below depicting Nate Schmoe, of GPRS, Inc. scanning the area with the palm antenna and the SIR-3000. If you would like to receive a proposal for similar work please visit the “Contact-Us” page at

GPRS South Florida – Locating Electrical Line at Brickell City Centre

Fusco photo

Not long ago, the GPRS team operating out of South Florida was contacted by a company who installs the equipment that is needed in order to wash windows on high rise buildings. This type of equipment is responsible for supporting up to two individuals, with their window cleaning equipment, as they clean the tallest of buildings. This project entailed the installation of very large anchor bolts around the roof of the Brickell City Centre, a high-end shopping mall that recently opened in downtown Miami. The problem they were faced with was the location of an electrical line previously installed around the perimeter of the roof (located fifty-two stories above the ground). Accidentally drilling into that line could have been extremely dangerous, and most likely fatal. They asked GPRS to come out onsite and locate the electrical line in question.

Scanning along the edge of a building over five hundred feet tall is not something that we get asked to do every day, but it is definitely something we are capable of. Safety is priority number one before we walk on to any job site, and even more so with a project such as this. There was no wall or railing around the perimeter of the roof, which meant that anyone on this section of the roof had to be wearing a personal fall arrest system and be tied off to an anchor point at all times. Our project manager (pictured below), did just that. As you can see from the picture below, he was walking along the very edge of the building and stayed tied off at all times. Using the Radiodetection 8100 (not pictured) he scanned the entire edge of the building searching for live power. He was able to identify the line in question which was located directly where the company planned on drilling for their anchor points. With the information our project manager was able to provide, this particular client was able to re-design how they would be anchoring to the building.

The project was completed safely, without incident and in a timely manner. This is just one example of how GPRS can be extremely helpful in not-so-average situations. If you have an upcoming project that you would like us to assist on, please don’t hesitate to contact us. You can visit the “contact us” page at or simply click here.

GPRS South Florida – Rebar Mapping at Hard Rock Stadium

Recently, the GPRS office, located in Miami Florida, was contacted by an electrical contractor that was completing a project at the Hard Rock Stadium located in Miami Gardens, Florida. This is also the home of the Miami Dolphins. This stadium recently underwent a five hundred-million-dollar renovation and work is continuing to be completed throughout the off-season at this facility. The GPRS team in South Florida has completed projects on this job site on several different occasions. This particular contractor was installing Wi-Fi hotspots throughout the stadium to help improve cell phone reception for its attendees. They contacted GPRS in order to locate any and all steel reinforcement in the areas that they planned on core drilling for their electrical conduits. It was very important to locate the steel within the slab in order to avoid compromising any of the structural integrity of the existing slab.

GPRS South Florida – Rebar Mapping at Hard Rock Stadium

For this particular project, the project manager pictured below is using GSSI’s (Geophysical Survey Systems, Inc.) SIR-3000, with their 1600 MHz antenna. With this equipment, he was able to identify the top and bottom layers of rebar located throughout the slab. A total of fifteen different areas were scanned, and steel was identified in each of these locations. With this information, the contractor was able to drill directly through the slab without damaging any of the reinforcement within the slab. In this particular case, no conduits were found to be within the areas scanned but this is oftentimes not the case. Our project managers are equipped with the knowledge and experience to identify any form of reinforcement within various concrete slabs, whether that be pan deck, rebar, post-tension cables or wire mesh. The use of our service can be applicable to many different types of projects.

Upon project completion, the company that contacted us for this project was extremely pleased with the result. Through effective communication and GPR knowledge, this project was completed without any issues. If you have an upcoming project that you would like us to assist on, please don’t hesitate to contact us. You can visit the “contact us” page at or simply click here.

Private Utility Locate at Power Plant – Crystal River, FL


Ground Penetrating Radar Systems, Inc. (GPRS) was contacted by a construction company in order to locate utilities at a power plant in Crystal River, FL. The construction company needed utilities located, marked out on the surface with paint, flags, and a depth. After marking out all utilities, the contractor needed all findings put into a cad map file for the company to have on file. The contractor contacted GPRS of Tampa to perform the GPR and GPS mapping needed for this project. The contractor needed this project completed in order to be able to expand their operations area.

A GPRS technician was contacted in order to perform the survey at this location. Using our 400MHz antenna and RD7000 radar equipment, we scanned each area of concern. We were able to map out all needed buried utilities. All located utilities were marked with paint, flags and a depth to the top of the anomaly directly on the surface. After all areas of concern were located and marked out, the findings were clearly relayed to the onsite contact. The contractor was pleased with our results and felt relieved to know where the utilities were located, and at what depth each utility was prior to excavating.

Upon arriving onsite, the technician met with the contractor and went over the areas of concern that needed utilities located. Each area was scanned in a north/south, east/west pattern with the RD7000 for any power or communications. The GPR 400MHz antenna was used to scan each area in a north/south, east/west pattern to locate the exact location and depth of the utility. All located utilities were marked out with paint, flags and a depth. Each utility was color coded accordingly. Red-power, Orange-communications, Blue-water, Yellow-gas, Green-storm/sewer, White-unknown utility. We used our Trimble Global Positioning System, (GPS) technology to locate the coordinates of each located utility. We then took this information and put it on a cad map file for the contractor.

Locating Existing Utilities in Advance of Directional Bore

Locating Existing Utilities in Advance of Directional Bore (Florida)We at Ground Penetrating Radar Systems, Inc. were recently called out to a sprawling jobsite in central Florida to locate existing utilities in advance of directional bore.  Four separate borings were planned by our customer to run several electrical conduit lines throughout the property.  Unlike laying new utilities in a trench, a directional bore drills through the ground with no visual confirmation of existing utilities that are being passed over or under by the bore.  That is where GPRS comes in.  Using both our 400MHz radar antenna and our RD8100 Radio detection wand, we scanned the entire area along the proposed route of the directional bores.  These tools allow our technicians to determine both the location and the depth of any utilities the bore path might cross.  Accurate depth detection is crucial for directional boring jobs, because it allows our customers to determine the depth of the bore at every point along their proposed path, allowing them to avoid hitting existing utilities.

On this particular job, the depth of existing utilities rose and fell constantly due to the uneven and constantly changing terrain.  The versatility of the cart used to house our 400MHz antenna was well suited for this task.  We were able to orient the radar over existing lines as mounds of dirt rose and fell along the scope of the scan.  Being able to pinpoint these depths gave our customer the information needed to plan their directional borings.  The path including the sloping terrain mentioned above, as well as multiple street crossings, including an intersection.  Street lighting, water lines, sanitary lines, communication lines, and gas lines were all found and marked per the customer’s request.  Utilities that were expected, as well as some that were completely unanticipated were located and mapped.  The sheer number of existing utilities under the property were a testament to the value of quality GPR work in such situations.

Hitting existing utilities can be dangerous and costly, and we at GPRS pride ourselves in providing the best information possible to our customers prior to digging, trenching, boring, coring, or any other needs that require subsurface locating.

Locating Water Leaks at an Orlando Theme Park

Orlando has many theme parks. One of those theme parks had a large water pipe running near a pool area that had a leak. They were able to locate the leak and repair it. However, due to the water leakage, they were worried there could possibly be a large void underneath the pool area which can be problematic for the structural integrity of the pool. The renovation team hired to correct the issue knew that GPRS would be able to assist in detecting the possible voided area underneath the pool.

To correct the issue, the repair team would need to drill and then inject material in several locations to fill the void under the pool. The team was also aware of the possibility that there could be utilities running directly underneath the pool deck. Water and electrical lines could very well be right underneath the pool making the team hesitant to simply drill through the deck to inject the corrective material. GPRS was able to scan the concrete pool deck and give the team knowledge of where the void was and how wide it was in all directions. After locating the void area, the scan technician then proceeded to mark out all of the structural steel and possible utilities. To preserve the aesthetics of the pool, lumber crayons were used which would wash away days after the scanning was completed. A report was provided to the company including data shots and photos outlining the details of the findings. Several days after the void was located, the company mapped out their injection points and was able to correct the issue without additional damage to the pool or utilities.

The picture below is Nate Schmoe, of GPRS, Inc. scanning the pool deck slab surface.

If you would like to receive a proposal for similar work please visit the “Contact-Us” page at

Orlando FL

GPRS Project-Melbourne FL

Post tension cables, electrical conduits, rebar and other structural steel, water pipes and various other objects are often found in concrete slabs. Construction companies, plumbing contractors, electrical contractors and renovation specialists are always in need of either core drilling through a slab or trenching through a slab on grade. Whatever the case may be, Ground Penetrating Radar Systems has an expert level of understanding when it comes to the need to “x-ray” or radar before you go penetrating a concrete slab.

In Melbourne, FL there are constantly needs arising when it comes to this. A local plumbing contractor was tasked with relocating some existing plumbing lines. Having used GPRS a time or two before, they felt confident the professionals there would be able to give them the attention needed to get through the slab without cutting anything critical and that they could locate the plumbing lines to be moved.

GPRS showed up on site and used the 1600 MHz and 400 MHz antennas to scan the floor. The professional on site scanned the entire area in a grid pattern to assure that there was no mistaking the location of the plumbing. Contractors only like to cut through a slab once if they can help it.  After mapping out the areas, the GPRS professional used markers to indicate where the plumbing was located. These findings were then relayed to the site contact to ensure all information was accurately communicated. The client was able to penetrate, cut and trench in the areas scanned without hitting or cutting any electrical conduits or critical structural steel. The client expressed gratitude on the quick turn-around time and skill the technician brought to the project. Clients who use GPRS know they are getting the highest level of service when using our product.

You will see a picture below depicting Nate Schmoe, of GPRS, Inc. scanning the slab on grade surface.

If you would like to receive a proposal for similar work please visit the “Contact-Us” page at

GPRS Project-Melbourne FL