GPRS Uses Specialized Tools to Mark and Map out Post Tension Cables

Cover_DecemberWhen Saw cutting or Coring in a slab that has Post Tension Cables for reinforcement you need to call an expert. It is extremely important to GPR the slab to mark/map out the Post Tension cables. These cables have so much pressure on them that they can fly right out of the side of the building and in some cases, rip right up through the slab. Very Dangerous and could cost big bucks to fix. Before you Cut or Core call GPRS, Inc. All kinds of contractors in North Texas trust and task GPRS, Inc for concrete scans if they are going to do any saw cutting and/or coring.

Rameez “Rami” Baloch
Project Manager – DFW/North Texas

Direct 682.999.0046  |

Find out more how GPRS, INC can help you stay safe on your project by contact Rami Baloch at 682.999.0046 or email at

All Clear in Aisle 3

Before the removal on the concrete slab in a local grocery store, the Atlanta office of Ground Penetration Radar Systems was called in to help identify any potential underground conduits or shallow utilities. The store was installing new refrigeration lines and the area needed to be scanned before the concrete was saw cut.

Using the 1600 MHz radar and the SIR 3000 we were able to locate refrigeration lines, power lines and other unknown anomalies that would have been struck during the saw cutting process if not identified ahead of time. GPRS was able to successfully map out all potential underground conduits and utilities with great accuracy. As you can see in the photos, we were able to identify the pvc lines before saw cutting. By giving estimated depths and locations, we allowed the contractor to saw cut with precision and speed. Ground penetrating radar is an essential tool before any excavation process to ensure a safe job site and eliminating the cost and hassle of fixing hit utilities.

Patrick Moulin
Project Manager – Georgia

All Clear in Aisle 3-1

All Clear in Aisle 3-2

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.

GPR Used to Locate Radiant Heating

Ground Penetrating Radar Systems, Inc. of Denver, CO was contacted by a Homeowner to locate Radiant Heat tubing within a concrete slab. The client was looking to drill into the concrete slab and did not strike the in floor heating within. For a project like this, GPRS is able to determine the location of the tubing within the concrete using both ground penetrating radar (GPR) and a Thermal Camera. This method insures the most accurate way to be certain the floor heating system is not compromised. GPRS, Inc. arrived on site without delay using digital concrete imaging utilizing ground penetrating radar and thermal imaging to map out the contents of the slab to determine how to best proceed with the drilling of the slab.

GPR used to locate Radiant Heating in DENVER, CO

Ground Penetrating Radar Systems, Inc. specializes in ground penetrating radar service and is our primary source of revenue. With that in mind, the amount of experience and specialization of subsurface imaging and investigations as well as a nationwide network of technicians; GPRS, Inc. is unrivaled in the Ground Penetrating Radar industry.  GPRS, Inc. can supply your project with the safest and most accurate ground penetrating radar service in the business. Your safety and job effiency is our main goal at Ground Penetrating Radar Systems, Inc.

If you are interested in learning more about our subsurface imaging capabilities or other Ground Penetrating Radar applications such as determining the contents of a concrete slab or block wall for a structural investigation, locating Underground Storage Tanks (USTs), clearing boring locations of possible Utilities for soil samples, Void Detection or even graveyard mapping;  don’t hesitate to contact us for a demo or lunch and learn – let us buy your team lunch so we can tell you more about our company and what we can offer your company and projects. Ground Penetrating Radar Systems has an office local in Denver, CO serving all of Colorado and Wyoming as well as local offices in Salt Lake City UT, Albuquerque NM, Phoenix AZ, Omaha NE, and Kansas City. Ground Penetrating Radar Systems, Inc. also has offices in nearly every major city in the United States. Contact Ryan Shannon (Project Manager) at 303.913.8630 or today to schedule an appointment or free demo or if you have any inquiries. Visit for more information on how we can serve you with the many applications of GPR.

GPRS Locates Utilities, Vault, & Tunnel at Youngstown State University

Ground Penetrating Radar Systems was recently called out to a project by a general contractor to locate utilities for a project at Youngstown State University.  The scope of work was to locate any underground utilities for a new steam line that needed to be installed.  By using GPR and Radio Detection, many utilities were located.  Gas, electric, communication, chilled water, steam, sanitary, storm, and fire water were all located in the area of concern.  The outlining of an underground vault was also located with GPR as well as an underground tunnel that connected to the vault.  GPRS painted and flagged all utilities, the vault, and the tunnel on site.  In addition to locating the utilities on site, GPRS also completed a CAD and Google overlay of everything located on site to the contractor.  GPR and Radio Detection is an accurate and effective way of locating underground utilities, vaults, tunnels, and other obstructions prior to excavation.  Why dig not knowing where any utilities are when GPRS can locate and mark all utilities with depth indications for your safety!

The image below shows some of the many utilities located on site.

Youngstown State University1

Below is an aerial displaying everything located on site.

Youngstown State University2



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.
  • 400 MHz Antenna
    • This antenna typically allows data collection to a depth of approximately 4’- 6’, with a maximum capability up to 12’ depending on soil conditions. This specific antenna was created and calibrated specifically for locating underground utilities, UST’s, and other underground anomalies.

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.

GPRS Used to Help Environmental Company Miss Private Utilities

A General Contractor had a project in Wakefield, MA in the parking lot of an automobile dealership. The scope of the project was to locate private underground utilities prior to the drilling of several environmental soil borings and also locate a suspected buried Underground Storage Tank (UST) or the excavation pit. The General Contractor decided to contact Ground Penetrating Radar Systems of Massachusetts after learning that they have been in business since 2001 and each technician has the experience of performing over 350 surveys per year. GPRS was able to complete the investigation the next day and allowed the project to proceed without hitting a single utility line. The field technician was also able to verify through GPR that no UST remained in place. Through the use of real time applications and an experienced technician GPRS was able to locate all of the utilities, and give the client the safest and most ideal locations to trench.

At the job site, GPRS scanned the designated area(s) of an asphalt parking lot per a provided site map. All soil boring locations were pre-cleared of utilities and marked in a safe location. The General Contractor now had the information needed to proceed with the project without causing any delay in business. The General Contractor was enamored with the quality of work that was performed and the timely, efficient manner in which it was done.

Before saw cutting, trenching, or coring in Massachusetts, Rhode Island, Vermont, Maine & New Hampshire, contact Project Manager of GPRS, Peter Kessinger, at 603.703-.6007 or You can also visit us on the web at

GPRS Used to Help Environmental Company Miss Private Utilities

Navigating Historic Underground Tunnels

A general contractor in the Milwaukee needed to identify the location of a known underground tunnel constructed in the 1880’s for use by nuns and clergy before performing storm sewer upgrades; they contacted GPRS to use Ground Penetrating Radar (GPR). Marcus Thie, Project Manager for the Wisconsin market was able to locate the underground tunnel, which connected several churches over multiple city blocks, with a GSSI 400 MHz antenna and RD8100 radio detection wand.  GPRS was able to mark out the location, extents and approximate depths of the tunnel in various locations throughout the span of the project clearly for the client. Since the data is displayed in real time, the areas were marked easily, and the team could move forward with their process without worry of damaging a Milwaukee historic landmark. GPR is also used to determine the presence of underground utility lines and underground storage tanks in plants, factories, and other occupied spaces because it does not emit harmful radiation, produces virtually no noise or interference, and will not disturb business operations. It can also be used to determine the presence of obstructions in concrete prior to saw cutting or drilling.

Navigating Historic Underground Tunnels

Scanning for Utilities in So. California

Ground Penetrating Radar Systems, Inc. – GPRS – of Southern California was contacted by a survey company in order to scan for utilities prior to collecting our findings and placing them in CAD drawings. The purpose of our scan was to map out twelve 100’x100’ sites throughout the greater Bakersfield area; at each site there is a proposed trench path which will be within our scanning boundaries. These trench paths will contain new communication lines that will feed proposed cameras that are to be installed on existing light poles. We found that the soil conditions allowed for max GPR depths of 4’-5’ in most areas and among our findings were electrical, sewer, gas, water and communication lines. All findings were marked on the surface with spray paint and depths were provided when applicable.

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.

GPRS - of Southern California

Photo of area scanned. To schedule service or obtain a quote, please contact Alfredo Espinal 805-729-5877 or