GPRS and True Point Partner on a Case Study in Chicago

The client is converting a 1980s office building to a luxury hotel one block from the Magnificent Mile, and needed to locate tension cables and rebar to accurately place mechanicals. To facilitate the design, the client needed precise documentation of the substructure and surrounding structural elements.

When drilling holes in a post-tensioned slab, inaccuracies could produce costly and sometimes catastrophic results. Ground Penetrating Radar Systems Inc. (GPRS) uses ground penetrating radar to locate, identify and mark post-tensioned cables and rebar in multiple areas of concrete on several floors, but the process of manually documenting these physical markings in CAD can be tedious, and measuring and modeling such a complex system of cables by hand can produce inaccuracies.

With TruePoint Laser Scanning, GPRS’s markings can be captured, in addition to all the elements of the surrounding structure, and aligned to the design model quickly and accurately. The combination of the laser scan and ground penetrating radar provides an overlay of multiple datasets, giving the client a high-definition 3D comprehensive view of the entire structure, both visible and invisible.


The client was provided with indexed point clouds for each floor in .rcp and .rcs file formats (ready to be used in Autodesk products). In addition, the client received AutoCAD 2015 2D floor plan drawings (in .dwg and .pdf file formats). The CAD drawings were aligned to the design drawings and included linework of the GPR markings and the point cloud x-referenced in.


In addition to the main purpose of capturing GPRS’s markings, the laser scan provided as-built documentation to verify existing conditions of the structure and all of the remaining Mechanical, Electrical and Plumbing, and Architectural features. The client was able to use the point cloud data to compare against the construction documents, minimizing their drawing or modeling hours, and preventing errors and omissions.

Utility Locate in San Francisco, CA


Ground Penetrating Radar Systems, Inc. was contacted by a large engineering firm to locate and map out underground utilities prior to conducting soil borings. Ground Penetrating Radar Systems, Inc. used a 400 MHz GPR antenna to perform the survey. The findings were marked directly on the surface with spray paint which gave the contractor the confidence and knowledge to continue with their soil borings.

GPRS uses the latest ground penetrating radar technology to provide critical information on utilities, materials, and other potential obstructions within existing structures or underground. Fast, accurate and safe, GPRS provides both two- and three-dimensional images of the scanned areas without damaging radiation. All of our equipment is registered and meets all standard FCC regulations.

Utilizing GPR reduces risk and cost; promotes a safe work environment; and provides non-destructive testing by locating materials such as concrete, plastic, metal, steel, rock, soil, ice, and pavement. Our client base includes hospitals, universities, surveyors, engineers, homeowners, contractors, environmentalists, and excavators.


GPRS Army Vet Assists on the New Veterans Hospital in Ft. Bliss, TX

Ft. Bliss is growing daily, and the new Veterans Hospital is going up on the east side of El Paso, TX. Army Combat Veteran and new Project Manager of GPRS of El Paso, Joseph Granados, takes great pride in being able to contribute to this project using the latest in GPR technology.

GPRS was recently called out to map out rebar so holes can be drilled at the base of the columns for anchors. They contacted GPRS to gain the information needed to safely drill so they didn’t compromise any existing bars during the construction process.


Once GPRS has located the reinforcing steel in your concrete structure, we will map a grid onto the surface of your structure to guide you as you drill. Utilizing this service will prevent damage to the integrity of the structure as our non-destructive technology eliminates the need for repair or patching work. Additionally, taking advantage of our expertise will minimize your risk of on-the-job injuries, accidents, and delays.

For your next project in the El Paso, TX region contact Project Manager Joseph R. Granados at 915-765-7442 or at You can also visit our website at

GPRS Locates Underground Storage Tank in Georgetown, SC


A local electrical contractor working on modifications on a local hospital property in Georgetown, SC recently contacted GPRS to help locate utilities and assist with the detection and removal of an underground storage tank using GPR. Grid scans with the 400 MHz ground penetrating radar antenna were performed to ensure and locate the main electrical line feed from the light poles to the main panel box. GPRS also utilized a radio detection device which helped in locating live electrical power and communication lines. GPR is an accurate and effective way to help locate underground utilities and the detection of Underground Storage Tanks as well as any other material that may be underground.

For your next project in SC, contact Project Manager Jeremy Martin by phone at 843-312-6662 or by email at You can also visit our website at

GPRS Utilized to Scan Concrete Cooling Tower Prior to Anchoring Steel Plate in East China, MI

Prior to saw cutting, core drilling or anchoring into a concrete structure, it’s important to have as much information as possible to what lies below the surface. We take out the guesswork by utilizing the proper GPR technology.

A general contractor had a project outside a cooling tower in East China, Michigan where they needed to drill and anchor bolts approximately 6 inches into an existing concrete cooling tower in order to install a steel plate. Ground Penetrating Radar Systems of Michigan was contacted to scan the concrete to map the existing reinforcing steel. GPRS utilized the latest in GPR technology to locate the reinforcing steel so when the contractor inserted the anchor bolts there wasn’t any reinforcing steel obstructing the drilling. GPRS then communicated the markings to the onsite Superintendent so everyone had a clear understanding of the findings.

Ground Penetrating Radar is an important tool to help ensure the safety of all workers involved in a project. To learn more about the capabilities of GPRS in the Michigan area, contact Project Manager, Brian Chmielewski at 517-512-0018 or


GPRS is Contacted by an Energy Company Before a Trenching Project

In March of 2015, Ground Penetrating Radar Systems, Inc. (GPRS) was contacted by an energy company in Ruskin, FL to locate utilities, a main water line, and any other anomalies before trenching to install new water lines. The company needed to be sure of where these anomalies were running to avoid hitting any of them.

Isaiah Runkle of GPRS was the Project Manager who performed the scan at this location. Using our 400MHz antenna radar equipment, we were able to map out the utilities and other anomalies which were running through the areas of concern as well as provide depths to the tops of the utilities found. The contractor was pleased with our results and felt relieved that they were able to work in the areas knowing where the utilities and other obstructions were located.

Before you start your next project, know what’s below by contacting Isaiah Runkle at 813-344-9656 or by email,

Trenching Project

GPRS Located Utilizes for an Underground Water Main Break in Richmond, VA

Ground Penetrating Radar Systems of Virginia was utilized to detect underground utilities in Richmond, VA. A plumbing company requested assistance in locating remaining private utilities on site at a large department store prior to repairing a water main break. They called Ground Penetrating Radar Systems, Inc. to locate it. GPRS Project Manager Josiah Donaldson verified the location, depth, and direction of several live conduits and a water line. GPRS was also able to see the void at the site of the water leak.

GPRS of Virginia performs GPR concrete and ground scanning to locate underground storage tanks, utilities, and other subsurface anomalies. Whether you are locating utilities or satisfying the bank’s questions about any subsurface surprises, GPRS has your answers. For help on your projects in Richmond, Williamsburg, or Virginia Beach, VA contact Josiah Donaldson at or call 804-393-8744 or 757-319-1903.


GPRS Contacted to Locate Void Underneath Concrete Slab

image001Ground Penetrating Radar Systems was contacted by a company that raises concrete slabs which have sunk into the grade beneath. This company needed to know where the voids below the concrete that are causing it to sink were located in order to target the most affected areas. GPRS was on site in Wyoming and successfully locate multiple locations that had fairly large voided areas.

Ground Penetrating Radar Systems used a 1600 MHz antenna for this application to locate the voids. All findings were marked on the concrete with tape at customers request for easy interpretation. GPR was ideal for this application due to the active work site in the surrounding areas. GPR emits no radiation and is safe for others to work in the area near the scan location.

For a similar scan on your job site in Utah, Idaho, and Montana please contact Adam Kubicki at 801-599-2115 or at Sonar has also been used to locate reinforcement and utilities in Provo, Ogden, Salt Lake City, Boise, Helena, and many more locations throughout the Rocky Mountain region.