GPR Scanning for Steel Reinforcement

Rebar detected with ground penetrating radar.

Rebar detected with ground penetrating radar.

Ground Penetrating Radar Systems, Inc. can identify obstructions embedded in concrete slabs such as post tensioned cables, rebar, plastic and metal conduits, beams, etc. Our technicians have the ability to identify an anomaly’s depth with the accuracy of plus or minus a half inch to the top of the anomaly itself. Moreover, we can detect the lateral position of the anomaly with an accuracy of plus or minus a quarter of an inch to the top center of the anomaly itself. This is important to note because there are often times a customer has to drill into the concrete to install anchors to a specific depth on both remodels and new construction projects. The obvious benefit of having such a high degree of accuracy is that the customer will have an indication of whether or not it is safe to drill.

GPRS, Inc. offers a response time unrivaled in the industry. Oftentimes, we can schedule your project the same day or within a few days at the most. By delivering fast and accurate service, you can be sure your project remains on schedule and within budget. Our experienced technicians set the bar and offer professional services to meet the needs of the fast-paced construction industry.

This GPR scan took place over a thirty-six-inch-thick concrete slab at a railroad fueling station in Temple, TX. The customer needed to identify the locations of the steel reinforcement running through the slab, so they could safely drill and install anchors in order to beef up the reinforcement.

David Hagenmayer with Ground Penetrating Radar Systems, Inc., was contracted to scan the area requested and mark out all rebar and obstructions in the concrete. David was able to determine the precise locations of the steel and the client was then able to safely and effectively drill for the anchors.

GPRS, Inc. of Austin is the most trusted concrete scanning company because of its highly trained and dedicated technicians. We are the best at what we do, because it’s all we do. Ground Penetrating Radar is cost effective, non-hazardous, and provides data in real time. For GPRS services in North Texas, please call (512) 417-6105 or email We also offer nationwide service. For a local representative, please visit our website at

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.

GPR Concrete Scanning – Atlanta, Georgia

Atlanta, Georgia – March 2017_1Ground Penetrating Radar Systems, Inc. (GPRS) was contacted to perform a GPR survey at a high-rise building in Atlanta, GA. GPRS was asked to determine the location of reinforcing, conduits, or any other potential obstructions prior to core drilling in multiple locations.

Ryan Abueg was the technician from GPRS that arrived onsite to complete this project. Prior to arriving on site, the locations had been laid out using the orange “X’s” that can be seen in the photos. Using the 1600MHz GPR antenna, any anomalies that were found were marked directly on the surface using a black marker. Once each location was surveyed, the findings were then explained to the contractor in order to develop a safe plan for the drilling.

The photos included depict the final markup of two of the areas of concern that were brought up by the contractor onsite. As mentioned before, the proposed core locations were laid out prior to GPRS arriving onsite. If these areas were cored before they were surveyed, there may have been serious damage done to the structure or lead to severe injury to the workers present. GPRS recommends that a GPR survey be performed prior to any cutting or drilling be performed.
Atlanta, Georgia – March 2017_2alternative to a costly repair to conduits or post tension cables damaged by drilling. GPR emits no radiation and poses no health hazards. Any findings are marked in real time directly onto the surface with no processing time which allows the contractor to begin drilling immediately after a survey. GPR is frequently used to scan the ground to determine location of underground utilities and underground storage tanks as well.

Ryan Abueg is the GPRS contact based in Atlanta, GA and he can be reached at 678.920.2842 or by email at

GPRS Does Utility Mark-Out at Jersey Shore

At an apartment complex located on the Jersey Shore, a contractor contacted GPRS to locate and mark on the surface all possible utilities on the property. The purpose of the utility mark-out was to identify all possible gas lines, water lines, communication lines and live electric. The contractor wanted to avoid all of these obstacles, in order to ensure the safety for his crew when excavating. GPRS was clearly able to identify all subsurface utilities within the property by accurately using ground penetrating radar, which is a safe and effective method for locating utilities subsurface.

For more information or a quote about a job in Philadelphia, New Jersey, and Delaware, contact, or call (609)-350-9651, and visit our website at

GPRS Does Utility Mark Out at Jersey Shore

GPRS Investigates Updating Cell Tower Site

GPRS Investigates Updating Cell Tower SiteGround Penetrating Radar Systems of Chicago was called out for utility locating at an existing apartment complex by a contractor who is renovating the buildings in the complex. The contractor hoped to find valuable information about utilities in the area for future modifications and add-ons on the site and, because they requested that GPRS came out and scanned, they can be more comfortable and confident in their future modification.

GPRS scanning assists contractors by giving them a real-time view of the utility layout, helping them to know where they can place certain boring or anchoring locations and it can help in reducing the likelihood of subsurface obstruction strikes during trenching, boring, and other sub-surface applications. Additionally, scanning can save valuable time by targeting specific anomalies/utilities to be uncovered and provide depth and location as well as information about the surrounding site. Ground Penetrating Radar Systems uses the RD-8000 Locator to help identify live power, communication and other utilities that may have a power signal on them. Once the utilities in the path were identified, they were marked directly on the surface so the customer will know where the utilities are. We can also detect utilities in the ground/under the surface via induction or conduction with an exposed or known surface utility line. This was all done in a safe, time-efficient, non-destructive way. Once all live power, communication and other utilities that might give off a power signal are located and marked out, GPRS uses ground penetrating radar technology to help in double-checking and locating other critical utilities under the surface. The radar emits radiation less than 1% of that found to be emitted by standard cell phones. This means practically no hazardous radiation to operators or persons around the work zone. Our system assists in the confirmation process of locating anomalies. Once the utilities in the path were identified, they were marked directly on the surface so the customer will know where the utilities are.  GPRS specializes in multi-technology investigations. In order to do so, we employ highly-qualified, trained and hardworking individuals. We guarantee the best service from our managers, with quick response times, quality information and data, great pricing, and enthusiasm. Each job comes with a job report of the findings from the site.

If your company needs reinforcing or conduit mapping in the Chicagoland, Naperville, Bolingbrook, Aurora or surrounding areas with fast response times and easy scheduling, please contact:

Mark Sims
Project Manager | Chicago, IL
(224) 661-5218 •

GPRS Locates Utilities outside First Energy Stadium

Ground Penetrating Radar Systems was recently called by a general contractor to locate utilities for a project just outside First Energy Stadium in Cleveland, Ohio.  The scope of work was to locate any underground utilities for a new pole location that needed to be installed.  By using GPR and Radio Detection, a gas line, electrical lighting conduit, and communication duct bank were located in the area of concern.  GPRS was able to designate areas to safely install new pole locations.  GPR and Radio Detection is an accurate and effective way of locating underground utilities prior to excavation.  Give us a call prior to your next project and we will find what’s below the ground.

Below lists further details of the equipment used.
GPRS Locates Utilities outside First Energy Stadium



Ground Penetrating Radar (GPR)

  • GSSI SIR – 3000
    • GPRS uses a Geophysical Survey Systems Inc. (GSSI) SIR-3000 Radar unit. This is the most advanced GPR available. It allows for onsite interpretation, as well as stores data for later processing. This equipment is self-calibrating, allowing more precise depth and location measurements.
  • 1600 MHz Antenna
    • This antenna allows data collection to a maximum depth of approximately 18”, depending on concrete conditions

Radiofrequency Detection System (RD)

  • RD 7000+
    • This is an electro-magnetic tone locating device manufactured by Radio Detection. This specific model 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 GPR.  It also allows us to detect utilities via induction or conduction with an exposed or known surface of the utility.

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.

Ground Penetrating Radar Scan performed at Gas Facility

Ground Penetrating Radar Systems, Inc. – GPRS – of Southern California was contacted by an environmental company in order to scan for drains at a gas plant in Marina Del Rey. The purpose of the scan was for the environmental firm to evaluate the number of drains onsite and the sizes to then determine whether the facility needs to add or replace drains. Due to the heavy rainfall earlier this year, the current drains were not exceeding expectations of draining the rain water down the steep slopes to the street which caused several mud slides onsite. We were able to find most drains up to 4’ with GPR, and we also used our Duct hunter to run through deeper lines to then locate them with Radio Detection 7000+. All findings were marked on the surface with paint and flags.

GPR scanning is a great tool to use for post tension cables, rebar, and conduits; it can also be used to scan for underground utilities prior to digging or excavating. GPRS has offices throughout the entire state of California and performs projects in cities like; Ventura, Santa Barbara, Thousand Oaks, San Luis Obispo, Bakersfield, Lancaster and the greater Los Angeles area. Please contact Alfredo Espinal at 805-729-5877 or to learn more about ground penetrating radar and how GPRS can assist in your projects.
Ground Penetrating Radar Scan performed at Gas Facility, Marina Del Rey, CA
Photo of drain line heading down the slope; this line was 4’ deep. To schedule service or obtain a quote, please contact Alfredo Espinal 805-729-5877 or

Removing A Buried Gas Line – Call GPRS First

Ground Penetrating Radar Systems of Kansas City was called to locate underground utilities in Kansas City, MO. The client was removing a buried gas line and was concerned that there were other utilities in the area that could be disturbed. GPRS was able to mark out multiple lines that were in the area and allow the client to perform his work without damaging any utilities.
Locating underground utilities–KansasCity,MOGPRS’S expertise in locating the unknown can provide the fastest and most reliable locate for your next project. GPRS can assist you with all of your locating and radar needs.  Using GPRS will not only save time and money during construction, it can also save a life. Ground Penetrating Radar Systems of Kansas City can assist you in your projects in St. Joseph, Lawrence and Topeka.  For more information about GPRS capabilities or questions on how we could assist you on your next project please contact Terry Jeffries at or 913-232-6533.