industry insights

What to Expect When You Order an Underground Utility Locating Survey

Here’s what AEC professionals should expect when they hire a local utility locating company near them to conduct a subsurface utility assessment, based on GPRS’ processes.

General contractors and facilities managers face significant risks when undertaking excavation projects of any size. Subsurface utilities, if not properly identified, can lead to costly delays, utility infrastructure damages, and risk the health and wellbeing of workers and the surrounding community.

A GPRS Project Manager deploys a large GPR device on a construction site before excavation begins. the excavator and crew are in the background. — A GPRS Project Manager utilizes a large GPR unit to scan for subsurface utilities prior to excavation.

GPRS specializes in subsurface utility surveys that provide highly accurate data to mitigate these risks. Here’s what AEC professionals should expect when they hire a local utility locating company near them to conduct a subsurface utility assessment, based on GPRS’ processes.

The Difference Between a General Underground Utility Assessment and S.U.E.

GPRS provides private utility locating and mapping services that support Subsurface Utility Engineering (S.U.E.) Level B investigations, but we do not conduct S.U.E.

Licensed S.U.E. surveys involve engineering assessments and regulatory compliance, which GPRS can complement and make significantly easier for the engineers themselves because we specialize in utility detection, location, and mapping using ground penetrating radar (GPR), electromagnetic locators, and CCTV video pipe inspection crawlers and push cameras, among other technologies, to identify underground utilities with 99.8% accuracy.

When it comes to utilities and excavation, GPRS focuses on nationwide rapid response scheduling and non-invasive utility locating, to ensure that contractors and facility managers receive precise, real-time data without costly excavation delays or expensive utility strikes. All GPRS Project Managers are certified in Subsurface Investigation Methodology (SIM), because its processes ensure repeatable and reliable results, no matter where in the country our team may be working.

GPRS utility mapping gives a construction or facilities team comprehensive utility data, that reduces risk and improves efficiency – helping to execute successful projects. Additionally, GPRS delivers its findings via SiteMap® (patent pending), a GIS-based platform that enhances collaboration and decision-making with RTK geolocated, layered, and interactive utility maps, NASSCO-certified video pipe inspection reports, reality capture deliverables that can integrate the subsurface and structural world of your project, and more.

Subsurface Investigation Methodology (SIM)

As mentioned above, GPRS adheres to Subsurface Investigation Methodology, a standardized approach to subsurface locating designed to ensure accurate and repeatable subsurface assessments. SIM requires the use of multiple complementary technologies, such as ground penetrating radar (GPR) and electromagnetic (EM) locating, to confirm the presence and location of underground utilities. The methodology also mandates rigorous training for technicians, including a minimum of 320 hours of mentored field training and 80 hours of classroom instruction. SIM ensures that GPRS Project Managers are equipped with the expertise needed to deliver precise results from coast to coast.

SIM also emphasizes a step-by-step approach to collecting subsurface data, ensuring that results are repeatable and accurate. This methodology is critical in preventing utility strikes, which can lead to severe financial and safety consequences. By following SIM, GPRS ensures that every project is conducted with the highest level of precision and reliability.

What Equipment Is Used in Subsurface Utility Surveys?

GPRS employs a range of advanced technologies in a complementary manner to detect, verify, and map underground utilities with 99.8% accuracy. These include:

1. Ground Penetrating Radar (GPR)

GPR works by transmitting high-frequency radio waves into the ground. When these waves encounter different subsurface materials, they reflect back to the receiver, creating a visual representation of underground structures. GPRS uses high-resolution GPR systems capable of detecting metallic and non-metallic utilities, voids, and other anomalies. For roadway, right of ways, and large-scale urban projects, GPRS can also deploy high-speed 3D GRP arrays.

2. Electromagnetic Locators

EM locators detect underground utilities by transmitting a signal through conductive materials such as pipes and cables. The signal is then traced using a receiver, allowing technicians to determine the precise location and depth of utilities.

3. CCTV Video Pipe Inspection Crawlers and Rovers

For assessing underground pipelines, GPRS utilizes robotic crawler CCTV cameras and lateral launch cameras. These devices provide high-resolution video footage of sewer and drainage systems, identifying defects, blockages, and structural issues without the need for excavation.

4. Acoustic Leak Detection

In addition to visual inspections, GPRS employs acoustic leak detection technology to identify leaks in pressurized pipelines. This method uses sound waves to detect irregularities in pipe integrity, allowing for early intervention and repair.

Utility Marking, Reporting, and Mapping

Once all registered/public and unregistered/private utilities are located, GPRS follows a structured process to mark, report, and map the findings:

• Marking Out Utilities

Utilities are designated using industry-standard color-coded markings, ensuring clear identification of all the different types of underground infrastructure. These markings help contractors avoid accidental strikes during excavation. You can learn more about the color coding for utility locates and mapping here.

• Reporting and Documentation

GPRS provides detailed reports that include depth measurements, where available, utility types, and potential hazards. In the case of sanitary and storm sewer lines, we can also generate comprehensive VPI reports, generated using NASSCO-certified WinCan software, which categorize defects and assigns severity levels to those defects.

• Mapping and Data Delivery via SiteMap

SiteMap® (patent pending) is GPRS’ GIS-based software platform that consolidates all GPRS-captured subsurface data into an interactive, layered map. SiteMap allows contractors and facility managers to access 99.8% accurate utility mapping in formats such as PDF, KMZ, and SHP files, and interact with their RTK-located data inside the SiteMap software. The platform is designed to provide a single source of truth, to ensure seamless communication and collaboration across project teams.

GPRS provides complimentary SiteMap Personal access to all its customers.

SiteMap can also allow construction project managers to track changes and modifications to the subsurface infrastructure as work progresses. This level of control is particularly valuable for large-scale projects where multiple teams need access to accurate and up-to-date utility data.

The Benefits of Hiring GPRS

Contractors and facilities managers who hire GPRS for subsurface utility surveys can expect several key benefits:

• Enhanced Safety

By accurately identifying underground utilities, GPRS helps prevent accidental utility line strikes that could lead to injuries or fatalities.

• Cost Savings

Avoiding utility strikes reduces costly repairs, project delays, and potential legal liabilities, safeguarding your company’s reputation.

• Regulatory Compliance

GPRS ensures that subsurface investigations adhere to the highest industry standards (SIM) and regulatory requirements.

• Improved Project Efficiency

With precise utility mapping and reporting, contractors can plan and execute projects more efficiently, reducing downtime and unexpected complications.

• Advanced Technology Integration

GPRS leverages cutting-edge technology to provide the most accurate and reliable subsurface data available.

Hiring GPRS for a subsurface utility survey ensures a high level of accuracy, safety, and efficiency. By adhering to Subsurface Investigation Methodology, utilizing cutting-edge equipment, and delivering comprehensive mapping via SiteMap, GPRS empowers contractors and facility managers to make informed decisions. With a 99.8% accuracy rate, GPRS significantly reduces the risk of utility strikes, project delays, and unforeseen costs, making it a trusted partner in subsurface investigations.

It's just one part of how we Intelligently Visualize The Built World® for customers nationwide. What can we help you visualize?

GPRS Prepares An Active Airport To Safely Conduct 128 Soil Borings

GPRS located all underground utilities at the Philadelphia International Airport to provide soil boring clearances without impacting operations.

Soil borings may have the word “boring” in the name, but GPRS Project Manager Andrew Heine’s job at the Philadelphia International Airport was anything but that.

After working with a local general contractor, James J. Anderson Construction, Heine was called back to work on one of their larger projects that needed a quick turnaround.

The client planned to perform 128 soil borings around three of the airport’s taxiways, which are pathways that allow planes to move between runways, terminals, hangars, and parking areas. The purpose of the borings was to run environmental tests on the soil to determine if any areas were compromised by hazardous chemicals. These tests were the first steps in a restoration project for the airport.

“They'll bring those soil borings back to the lab and test them for contamination, but they really want to redo some of these taxiways because they're getting old,” Heine explained. “So, it's like the groundwork for this future project.”

Heine was tasked with scanning the areas the GC chose to drill to locate and map any underground utilities or infrastructure in their planned pathways. The airport also had to remain in operation, which posed an extra challenge for Heine and his team, but they were up for it.

“We had escorts making sure we weren't in the way of any planes and they're real strict about that for good reason,” Heine explained. “So that was part of the challenge since we could work some of the time. A lot of times we had to get out of the way, but we were able to make it happen.”

Despite the added challenges of working near active runways, Heine couldn’t help but be in awe of where his work with GPRS brought him that day.

“So, it's on the taxiways and there are challenges with that as far as where we can be and where you can't be, but it's kind of cool to look at all the planes go by.”

An airport taxiway with paint markings — GPRS Project Managers followed the Subsurface Investigation Methodology by using ground penetrating radar (GPR) and electromagnetic (EM) locaters to scan each area

The client marked out each planned coring location with orange spray paint or flags. Heine could then begin scanning the areas while marking his findings with paint and flags too.

“While we were there, the customer marked out their borings in orange. Then we scanned it and made sure they wouldn’t hit anything within a 10-foot radius,” Heine explained. “So, we scan around it to make sure that there's no conflict and nothing gets hit. Then, when we're done, we put this white box around it, saying that we scanned it, and you guys are good to go.”

Because of GPRS’ 99.8% accurate scans, the client can drill with confidence and avoid utility strikes

During Heine’s investigation, he found some underground infrastructure that was directly in the path of some of the client’s planned drilling locations.

Referring to the photo above, Heine said, “That's a [power] line, and that's pretty much right on [the core location]. So, I think if we weren't there, they would have hit that line for sure. If they just did it anyway [without GPRS], they would have hit a few things.”

Without the help of GPRS’ 99.8% accurate scans, they would have most likely hit that power line and possibly hit other underground utilities and infrastructure as well. Doing so would not only delay the project and potentially affect flight schedules; it could have put the lives of the workers at risk.

Heine has been a Project Manager with GPRS for over five years and this is the largest soil boring job he’s had to date.

“That’s a lot, that’s the most I’ve ever done,” Heine said.

The client gave Heine short notice and needed a quick turnaround, but with the help of GPRS Project Manager Trainee Carlos Hernandez, they were able to provide the GC with what they needed in a timely and efficient manner.

“This [job] took six and a half days, and we finished it early,” Heine explained. “Actually, I had a trainee with me who made it go a lot more quickly. We were ahead of schedule, and it was a pretty smooth operation.”

All of Heine’s findings were then secured and delivered via SiteMap® (patent pending) to provide the client with a record of their existing private and public utilities on site that they could securely access 24/7.

How Proper Utility Locating Enhances Soil Boring Safety and Accuracy

Soil borings are a common method used for Phase II Environmental Site Assessments (ESAs). These assessments are done by drilling into soil to properly understand the subsurface conditions of a property just like the airport did above.

Drilling of any kind carries inherent risks which is why the incorporation of utility locating in the planning process is vital.

GPRS offers nationwide, precision utility locating services to help ensure the success of environmental projects.

Hiring professionals like GPRS to locate underground utilities can prevent utility strikes, protect personnel and equipment, improve the accuracy of the samples taken, and reduce project delays.

Some of the best practices that maximize the benefits of utility locating during these assessments are:

Schedule utility locating services before fieldwork begins
Follow the ground disturbance policy, also called the dig policy of the general contractor
Use SIM-certified professionals like GPRS, who use multiple technologies to verify findings
Maintain clear records of all markings, maps, and findings from the utility locating phase
Communicate any hazards to the drill crews
Re-evaluate if boring locations shift or the scope of work changes

Based around the requirements of Subsurface Investigation Methodology (SIM), GPRS offers complimentary ground disturbance policy reviews for general contractors as part of our ultimate pursuit: 100% subsurface damage prevention.

With GPRS’ 99.8% accurate concrete and underground utility scans, you can drill with confidence and keep your projects on time, on budget, and safe.

What can we help you visualize?

FREQUENTLY ASKED QUESTIONS

What is the difference between a Phase I and Phase II Environmental Site Assessment?

A Phase I Environmental Site Assessment (ESA) is a preliminary, non-intrusive investigation to identify potential environmental risks or recognized environmental conditions (RECs) through records reviews, site inspections, and interviews. If RECs are identified, a Phase II ESA is conducted as a more detailed, intrusive investigation involving soil, groundwater, or air sampling to confirm and characterize contamination. While Phase I focuses on identifying potential risks, Phase II provides concrete data to guide remediation or determine the extent of contamination.

What is Subsurface Investigation Methodology?

Subsurface Investigation Methodology (SIM) is a standard operating procedure and set of professional specifications that work as a guide for utility locating experts when scanning for buried utility lines. All GPRS Project Managers are required to achieve SIM 101 certification, which requires 80 hours of hands-on training in a classroom setting and 320 hours of mentorship in the field. For reference, the American Society for Nondestructive Testing’s (ASNT) minimum training recommendation includes eight hours for training and 60 hours practicing GPR to achieve NDT Level 1 certification in ground penetrating radar (GPR) scanning.

SIM requires the use of multiple, complementary technologies, like GPR scanning and electromagnetic (EM) locating, when locating buried utilities or scanning a concrete slab.

GPRS Clears Soil Boring Locations in Pennsylvania

GPRS deployed multiple forms of subsurface investigation technology to clear 19 soil boring locations across 130 acres in Pennsylvania.

Project Managers Eliott Nero and Kyle Longino utilized electromagnetic (EM) locating and ground penetrating radar (GPR) scanning to ensure there were no utilities within 10 ft of each of the planned soil boring locations in Mercer, Pennsylvania.

The soil borings were part of the client’s construction planning process.

“They were doing samples of the soil and some samples of gas in the soil,” Nero said.

A GPRS-branded vehicle parked in a rural field. — GPRS deployed multiple forms of subsurface investigation technology to mitigation utility strikes during a soil boring project.

Also known as soil tests or geotechnical investigations, soil borings are conducted to gather information about the subsurface soil and geological conditions and assist with the design of foundations, assessment of environmental conditions, planning for infrastructure projects, and more.

There are several methods available for conducting soil borings. Among them, direct push and hollow stem auger drilling are the most widely used techniques for collecting soil samples and are generally effective in a variety of conditions.

Direct push drilling involves using hydraulic pressure to insert a pipe into the ground, extracting a cylindrical soil sample in the process. Hollow stem auger drilling, on the other hand, uses rotating hollow auger pipes with cutting teeth to bore into the soil and retrieve samples. While these two methods are the most commonly employed, alternative techniques are available when specific site conditions require them.

Following the soil boring and subsequent analysis, it may be necessary to install monitoring wells to continue testing, particularly for groundwater assessment. These wells are typically installed using similar drilling methods.

Geotechnical drilling is a critical step in confirming that the subsurface conditions are suitable for supporting a future structure. This process is conducted before construction begins and involves collecting rock and soil samples from below the anticipated foundation depth at various points across the site.

Whenever excavation or drilling equipment breaks the ground surface, there is a potential risk of hitting underground utilities. This is why it is essential to hire a professional utility locating company like GPRS to identify and mark all underground utilities before drilling begins, ensuring safety and preventing service disruptions.

GPRS uses EM locating and GPR scanning to locate and map buried utilities.

GPR scanners emit radio waves into the ground, then detect the interaction between those waves and any buried materials like utility lines or underground storage tanks (USTs). These interactions are displayed in a readout as a series of hyperbolas, which vary in size and shape depending on what kind of material was located.

GPRS Project Managers go through extensive training to be able to interpret the data collected with GPR to tell you what was located and provide an approximate depth for each located object.

EM locators are the perfect complement to GPR scanning when conducting utility locates.

Rather than locating buried objects, EM locators detect the electromagnetic signals radiating from metallic pipes and cables. These signals can be created by the locator’s transmitter applying current to the pipe, or from current flow in a live electrical cable. They can also result from a conductive pipe acting as an antenna and re-radiating signals from stray electrical fields (detected by the EM locator functioning in Power Mode) and communications transmissions (Radio Mode).

Signals are created by the current flowing from the transmitter which travels along the conductor (line/cable/pipe) and back to the transmitter. The current typically uses a ground to complete the current. A ground stake is used to complete the circuit through the ground.

By combining the strengths of GPR and EM locating, along with our industry-leading training program, GPRS provides 99.8% accurate utility locating data to help prevent costly and potentially dangerous subsurface damage during your excavation projects.

Nero and Longino were asked to very there were no utilities within a 10 ft radius of each of the 19 soil boring locations. The biggest challenge to completing this job was that the field was covered in dense undergrowth.

“…It changes a bit as far as what equipment we can use,” Nero explained. “Like today, we were not able to take the GPR cart around because of the tall weeds and moisture on the weeds. This affects GPR data.”

“…We mostly relied on our EM locators to do passive radio and power modes sweeps,” Longino added.

Screenshot of soil boring locations in SiteMap. — SiteMap allows for securestorage and sharing of accurate, field-verified infrastructure data with allproject stakeholders.

The data Nero and Longino collected was uploaded into SiteMap^® (patent pending), GPRS’ infrastructure mapping software application. Accessible 24/7 from any computer, tablet or smartphone, SiteMap serves as a single source of truth for the accurate, field-verified data you need to plan, design, manage, dig, and ultimately, build better.

From soil borings to sewer pipe inspections, to 3D BIM Model creation and beyond, GPRS Intelligently Visualizes The Built World^® to keep your projects on time, on budget, and safe.

What can we help you visualize?

Frequently Asked Questions

Can GPRS Project Managers distinguish between the different utilities they locate?

In most situations, we can identify the utility in question without any problems, although it is not always possible to determine what type of utility is present. When this happens, we attempt to trace the utility to a valve, meter, control box, or other signifying markers to determine the type of utility buried.

What type of informational output does GPRS provide when conducting a utility locate?

Our Project Managers flag and paint our findings directly on the surface. This method of communication is the most accurate form of marking when excavation is expected to commence within a few days of service.

GPRS also uses Real-Time Kinematic Positioning (RTK) to collect data points of findings. We use this data to generate a plan, KMZ file, satellite overlay, or CAD file to permanently preserve results for future use. GPRS does not provide land surveying services. If you need land surveying services, please contact a professional land surveyor. Please contact us to discuss the pricing and marking options your project may require.

Massive Monoliths Key to $1.5B Kentucky Lock Addition Project

A lock on the Tennessee River that was originally built in 1944 will double in length as part of an ongoing expansion project expected to be completed by July 2027.

The Kentucky Lock is undergoing a $1.5-billion overhaul that will see it expanded to 110’ x 1,200’ with an addition adjacent to the existing lock. According to a recent Engineering News-Record article, the existing lock will remain operational once the project is completed.

The U.S. Army Corps of Engineers, which is managing the project, said that once completed, the increased capacity of the expanded lock will alleviate current delays for vessels that average 10 hours – the highest of all U.S. locks.

Key to this western Kentucky construction project are 64 structural monoliths which form the lock’s core. The first of these monoliths topped out in October 2024.

According to ENR’s reporting, the 100-acre construction side for the Kentucky Lock Addition project features a concrete batch plant, thousands of feet of a material conveyor system and specially built fabrication shops to manufacture elements needed for the monoliths.

Aerial view of the Kentucky Lock. — The Kentucky Lock is undergoing a $1.5-billion overhaul that will seeit expanded to 110’ x 1,200’ with an addition adjacent to the existing lock.

Thalle Construction Co., a Tully Group company based in Hillsborough, North Carolina, is constructing and installing the remaining structural components necessary to complete the new lock, which the Corps says will provide an economic benefit of roughly $114.3 million a year.

Thalle Project Executive Brian Sharp told the publication that constructing each monolith demands approximately 11,000 cubic yards of concrete to form the lock’s walls. Once completed, the structure will house an array of large valves, culverts, and ports designed to regulate the flow of water from Kentucky Lake into and out of the lock chamber, allowing vessels to move both upstream and downstream.

“Each monolith is essentially a massive concrete block,” Sharp said. “The monoliths are founded on a prepared bedrock surface and extend to the top of the lock.”

These blocks average 50 ft. in length, 110 ft. in height and vary in width between 75 ft. at the bottom and 25 ft. at the top.

“The monoliths are constructed in five-foot vertical increments and require up to 23 placements to complete,” Sharp says. “These five foot heights are referred to as lifts and represent individual concrete placements.”

Kenneth Bowen, project executive at Thalle, notes that, “altogether, the 51 monoliths needed to complete the downstream portion of the lock within our scope involve more than 1,200 separate concrete placements.”

Beyond the concrete, each monolith is reinforced with steel and incorporates numerous embedded fabricated metal components, including wall armor, line hooks, floating mooring bits, and internal features such as culvert liners, valves, and mechanical systems essential for operating the massive miter gates.

Thalle’s involvement with the lock began in 2010, following a contract award for site excavation, construction of nine upstream monoliths, and installation of the upstream miter gates. That initial phase concluded in 2016, and the company was awarded the current phase of work in 2021.

Bowen told ENR that ensuring each monolith is on stable ground has been a challenge throughout the Kentucky Lock project.

“Construction of each monolith starts at the foundation, where rock is blasted to a consistent elevation that is inspected and deemed competent to support the massive structure,” he said.

Many of the foundations demand thorough preparation, which involves rock cleaning, dental excavation, and filling surface irregularities with dental concrete before placing a concrete mud mat to finalize the foundation work.

In situations where subsurface geotechnical analysis indicates the need for further reinforcement, Thalle drills as deep as 60 feet into the bedrock and installs steel shafts encased in concrete to enhance structural support, Bowen explained.

How to Keep Your Infrastructure Projects On Time, On Budget, and Safe

The Kentucky Lock project is a critical part of America’s ongoing efforts to improve its inland waterway infrastructure, which received a C- rating in the American Society of Civil Engineers’ (ASCE) 2025 Report Card for America’s Infrastructure.

In that report, the ASCE referred to inland waterways as the “hidden backbone of the nation’s freight network, noting how $158 billion worth of goods move through it annually.

“Inland waterways allow commodities to move cost-effectively, reducing the strain on congested roadways and rail systems, and with fewer greenhouse gas emissions,” the ASCE wrote. “Federal funding has increased in recent years, but a $7.5 billion backlog for construction projects remains, causing ongoing lock closures.”

While the C- rating inland waterways received in the ASCE’s latest report card is an improvement over the category’s D+ rating in the organization’s previous evaluation, there is still plenty of room for improvement:

80% of the nation’s lock and dam infrastructure on the inland waterways system exceeds its 50-year design life
The advanced age and lack of capacity of most of the U.S.’s lock and dam infrastructure has resulted in an average delay of nearly three hours for vessels that rely on the inland waterways system
And increasingly unpredictable water levels and draught within this system exacerbate these issues for larger craft such as barges, which can’t be loaded to full capacity just in case they encounter shallow waters along their journey

Whether on water or land, GPRS supports the safe and efficient completion of infrastructure projects big and small with our comprehensive suite of subsurface damage prevention, existing conditions documentation, and construction & facilities project management services.

Utilizing state-of-the-art technology like ground penetrating radar (GPR), electromagnetic (EM) locating, 3D laser scanners, and remote-controlled sewer pipe inspection crawlers, we provide you with comprehensive above and belowground infrastructure data to help you plan, design, and build better.

From skyscrapers to sewer lines, GPRS Intelligently Visualizes The Built World^® to keep your infrastructure projects on time, on budget, and safe.

What can we help you visualize?

Frequently Asked Questions

Does GPRS Perform S.U.E. Work?

No, we don’t. However, our SIM-certified services support SUE quality level two assessments, eliminating the need to waste thousands of dollars on exploratory potholing.

Can GPR be used to verify known measurements?

We can use GPR to cross-check the measured depth and location of a located utility with existing as-built plans to verify the accuracy of plans.

How GPRS Utility Locating Protected a 174-acre University Campus from Subsurface Damage

When a historic college campus in Northcentral Pennsylvania required extensive repairs to its buried infrastructure, school officials turned to GPRS to help them keep the project on time, on budget, and safe.

Over a month, a team of GPRS Project Managers and support staff fully located and mapped the buried utilities of the 174-acre Mansfield University Campus of Commonwealth University of Pennsylvania, creating accurate as-builts that assisted in the safe and efficient repair of the school’s buried steam pipes and other underground infrastructure.

GPRS team members who worked on the project included: Business Development Manager Isaiah Runkle, Area Manager Sam Hart, and Project Managers Tommy Tann, Michael Folkenroth, Cole LaMacchia, Luis Castro, Stamatis Eleftheriou and Ngoc Nguyen.

(Left to right, top to bottom) Area Manager Sam Hart, Business Development Manager Isaiah Runkle, and Project Managers Ngoc Nguyen, Cole LaMacchia, Luis Castro, Michael Folkenroth, Stamatis Eleftheriou, and TommyTann.

“We were going seven days a week, non-stop,” Nguyen said. “…It started out with them asking us to do as much as we could, and then they eventually just wanted everything mapped…”

About Mansfield University

Mansfield University has gone by many names since it was founded as the Mansfield Classical Seminary in 1857. It became Mansfield University in 1983, when it joined Pennsylvania’s State System of Higher Education.

On July 1, 2022, Mansfield integrated with Bloomsburg and Lock Haven universities to form Commonwealth University of Pennsylvania: a single, comprehensive university with multiple campuses, which according to its website strives “to expand high-quality, affordable academic opportunities to support the needs of all learners.”

Mansfield University’s campus is carved out of the mountainous landscape of Northcentral Pennsylvania. The uneven terrain makes locating and mapping buried utilities particularly challenging. Fortunately, GPRS’ nationwide footprint allowed us to deploy a large group of our SIM-certified field team members to tackle the project.

“We’re talking about close to eight miles a day, all on an incline,” Nguyen said.

When conducting a utility locate, GPRS Project Managers primarily deploy two different pieces of technology: ground penetrating radar (GPR) and electromagnetic (EM) locating.

GPRS Project Managers go through extensive training to be able to interpret the data collected with GPR to tell you what was located and provide an approximate depth for each located object.

EM locators are the perfect complement to GPR scanning when conducting utility locates.

In addition to mapping Mansfield University’s buried infrastructure, GPRS also conducted CCTV Video Pipe Inspections of the campus’ storm and sanitary sewer lines to provide a more comprehensive understanding of these critical utilities.

VPI is a sewer inspection service that uses industry-leading remote video cameras to assess conditions and prevent problems in sanitary and storm sewer, and lateral pipelines. Our NASSCO-certified Project Managers locate clogs, identify cross bores, find structural defects & damages, and conduct lateral sewer inspections to help you plan repairs, maintain your system integrity, and mitigate risk.

“VPI was used to locate the storm and sanitary lines on site to provide a map of how the overall storm and sanitary systems runs through the site, what connects to them, and where they eventually leave the site and tie into the public sewer system,” said GPRS Project Manager Stamatis Eleftheriou.

When school officials saw how quickly GPRS was locating and mapping the campus’ buried infrastructure, they requested we extend our scope to include clearing the location of planned soil borings at the university’s football field.

Because soil boring can cause a drill rig to encounter a buried utility – or lead to the creation of cross bores if trenchless technology is used – it’s vital that all buried utilities in the project area are mapped before ground is broken to protect both the underground infrastructure and the workers who are breaking ground.

Screenshot of SiteMap utility mapping data at Mansfield University. — When a historic collegecampus in Northcentral Pennsylvania required extensive repairs to its buriedinfrastructure, school officials turned to GPRS to help them keep the projecton time, on budget, and safe.

As GPRS located and mapped Mansfield University’s buried infrastructure, the data we collected was uploaded into SiteMap^® (patent pending), our infrastructure mapping software application. Accessible 24/7 from any computer, tablet or smartphone, SiteMap serves as a single source of truth for the accurate, field-verified data you need to plan, design, manage, dig, and ultimately, build better.

GPRS’ proven methodology and technology, and the tireless work ethic of our field team members helped Mansfield University Intelligently Visualize The Built World^® while keeping their repairs on time, on budget, and safe.

What can we help you visualize?

Frequently Asked Questions

What type of informational output does GPRS provide when conducting a utility locate?

Can GPR be used to verify known measurements?

We can use GPR to cross-check the measured depth and location of a located utility with existing as-built plans to verify the accuracy of plans.

What are the Benefits of Underground Utility Mapping?

Having an updated and accurate map of your subsurface infrastructure reduces accidents, budget overruns, change orders, and project downtime caused by dangerous and costly subsurface damage.

How Noncompliant Fall Protection Can Be Worse Than No Fall Protection At All

A recent Engineering News-Record article argues that improvised, noncompliant fall protection is in some ways worse than no fall protection at all.

A recent Engineering News-Record article argues that improvised, noncompliant fall protection is in some ways worse than no fall protection at all.

In his piece published in February 2025, ENR's Deputy Editor Richard Korman examined the tragic case of siding installer Siarhei Marhunou, who in December 2021 fell to his death from the balcony of a Philadelphia residence undergoing renovation.

According to Korman’s article, an expert witness for Marhunou’s widow reported in her negligence lawsuit against the companies on the project that the protective guardrail on the balcony was too low to meet the federal standard for edge barriers where a ladder was in use and lacked a midrail.

Marhunou reportedly smashed through 2x4s that were part of the guardrail as he went over the balcony edge, falling 50 ft. and sustaining sever head and chest injuries that killed him. He was not wearing a harness or tie-off.

“Fatal falls continue to account for the greatest number of construction deaths, stubbornly staying in the 250-300 range each year from 2018-22, according to U.S. Labor Dept. data,” Korman wrote. “The department says it investigated fewer construction deaths from falls in the last two years, 234 and 189, respectively. A small but persistent subset of those accidents involve barriers that fail to meet federal standards: thin plywood boards dropped over slab openings, ramp edges “protected” by tape or rope and improvised, sometimes rickety wooden guardrails nailed together with whatever extra materials were on hand.

“These improvised, noncompliant barriers are in some ways worse than a completely unprotected edge or opening,” Korman continued. “While they may focus attention on a hazard, they also tend to induce confidence where none should be placed, especially on construction of roof decks and slabs where safety harnesses and tie-offs aren’t being used.”

A worker hooking a tether to their harness while looking out over a cityscape. — A recent *Engineering News-Record* article argues that improvised, noncompliant fall protection is in some ways worse than no fall protection at all.

The Illusion of Safety

One of the most dangerous aspects of improvised fall protection is the false sense of security it provides. Workers may believe they are protected when the system in place is incapable of arresting a fall or may even contribute to injury. Using ropes not rated for fall arrest, tying off to unstable structures, or fashioning harnesses from non-certified materials can all lead to catastrophic failure during a fall event.

This illusion of safety can lead workers to take risks they might otherwise avoid if they knew they were unprotected.

Noncompliance Equals Unpredictability

Fall protection systems are governed by strict standards set by organizations like OSHA (Occupational Safety and Health Administration) and ANSI (American National Standards Institute). These standards are based on rigorous testing and engineering principles. Improvised systems, by their very nature, do not meet these standards. They are often cobbled together from available materials without regard for load ratings, anchor strength, or proper usage.

This kind of noncompliance introduces a high degree of unpredictability. A harness might look secure, but fail under dynamic load. An anchor point might hold static weight, but shear off during a fall. Without proper testing and certification, there is no way to know how an improvised system will perform until it’s too late.

Legal and Financial Consequences

From a legal standpoint, using noncompliant fall protection can be just as damning as having none at all. In the event of an accident, employers can face severe penalties, including fines, lawsuits, and even criminal charges if negligence is proven. Insurance claims may be denied if it’s found that safety protocols were not followed, leaving companies financially exposed.

Additionally, regulatory bodies like OSHA treat improvised systems as violations. A site inspection that uncovers such practices can result in stop-work orders, citations, and reputational damage that can affect future business opportunities.

Compromised Rescue Operations

Another overlooked danger of improvised fall protection is its impact on rescue operations. Certified fall protection systems are designed with rescue in mind – harnesses have attachment points for retrieval, and anchor systems are placed to allow for safe access. Improvised systems often lack these considerations, making it difficult or impossible to rescue a fallen worker quickly and safely.

Delayed rescue can lead to suspension trauma, a potentially fatal condition that occurs when a person is left hanging in a harness for too long. Inadequate systems can turn a survivable fall into a fatal incident.

A Culture of Complacency

Allowing or tolerating improvised fall protection fosters a culture of complacency. It sends a message that cutting corners is acceptable, which can permeate other aspects of site safety. Once workers see that safety rules are flexible, they may begin to ignore other critical protocols, increasing the overall risk on the job site.

In contrast, enforcing strict compliance with fall protection standards reinforces a culture of safety. It shows that management values worker well-being and is committed to maintaining a safe work environment.

How GPRS Helps Keep Your Job Sites Safe

At GPRS, safety is always on our radar. We sponsor several safety initiatives designed to provide you with the tools and resources to keep your job sites safe:

Concrete Sawing & Drilling Safety Week: GPRS spends every January visiting job sites across the country to educate workers on the risks associated with cutting & coring concrete, including slips, trips and fall hazards, electrical shock, injuries like cuts and lacerations, structural damage, silica and dust exposure, and pinch points or kickbacks.

Construction Safety Week: During this annual event, our team members will visit job sites across the country to share best practices for a variety of workplace-related safety topics, including fall protection, confined spaces, heat stroke, and mental health. The focus of these safety meetings is on how each individual can make their space a safe space to work.

Together, we can reduce accidents, injuries, and fatalities on your job site.

Water & Sewer Damage Awareness Week: The cost to maintain the United States' aging wastewater infrastructure is not just a financial issue; it is a public health, environmental, and social justice concern. This is why GPRS sponsors Water & Sewer Damage Awareness Week (WSDAW), an education and safety initiative for water and wastewater professionals in municipalities, organizations, and large facilities. Through these free safety presentations, we hope to help these individuals and entities regain control of their critical water and wastewater infrastructure.

Top Sustainable Construction Materials: What They Are & How to Use Them

As the construction industry faces increasing pressure to reduce its environmental footprint, the demand for sustainable building materials has never been greater.

With the sector responsible for nearly 37% of global greenhouse gas emissions — much of which stems from material production — builders, architects, and engineers are rethinking traditional practices and embracing innovative, eco-friendly alternatives.

Illustration of a green building. — As the construction industry faces increasing pressure to reduce its environmental footprint, the demand for sustainable building materials has never been greater.

Sustainable construction materials not only reduce emissions and resource consumption but also enhance building performance, longevity, and resilience. Here are some of the most promising materials leading the charge toward a greener built environment:

1. Bendable Concrete (Engineered Cementitious Composite)

Traditional concrete is one of the most widely used construction materials – and one of the most environmentally damaging. Bendable concrete, or Engineered Cementitious Composite (ECC), offers a compelling alternative. Infused with polymer-derived fibers, ECC is 500 times more resistant to cracking than conventional concrete. This flexibility reduces the need for frequent repairs, lowering both maintenance costs and carbon emissions over a building’s lifecycle.

Moreover, ECC can be manufactured with less cement and even infused with carbon dioxide, further reducing its environmental impact. Its durability has been proven in real-world applications, such as a Michigan bridge deck that has remained maintenance-free for over a decade.

2. Mass Timber

Mass timber is revolutionizing the way we think about wood in construction. Unlike traditional lumber, mass timber products—such as cross-laminated timber (CLT) and glue-laminated timber (GLT)—are engineered by bonding layers of softwood to create large, strong structural components.

This material is not just renewable, it also acts as a carbon sink, storing CO₂ absorbed during the tree’s life. It’s a viable substitute for steel and concrete in many structural applications, offering a lower carbon footprint and faster construction times. Mass timber is increasingly being used in mid-rise and high-rise buildings, showcasing its strength, versatility, and sustainability.

3. Reclaimed and Recycled Materials

Reusing materials is one of the most effective ways to reduce construction waste and conserve resources. Reclaimed lumber, recycled steel, and repurposed concrete are gaining popularity for their environmental and aesthetic benefits.

Reclaimed wood adds character and warmth to interiors while reducing the demand for virgin timber
Recycled steel maintains its strength and durability while significantly lowering embodied energy
Recycled concrete can be crushed and reused as aggregate, minimizing landfill waste and reducing the need for new raw materials

These materials support circular economy principles and help divert tons of waste from landfills.

4. Hempcrete

Hempcrete is a bio-composite material made from the inner woody core of the hemp plant mixed with a lime-based binder. Lightweight, insulating, and carbon-negative, hempcrete is ideal for non-load-bearing walls and insulation.

Hemp grows rapidly with minimal water and pesticides, making it a highly renewable resource. Hempcrete also absorbs CO₂ during curing, contributing to a building’s overall carbon sequestration. Its breathability and thermal performance make it a healthy and energy-efficient choice for sustainable construction.

5. Mycelium

Mycelium, the root structure of fungi, is emerging as a futuristic building material. When grown in molds and dried, mycelium forms a lightweight, fire-resistant, and biodegradable material suitable for insulation, packaging, and even structural components.

Its production requires minimal energy and can be done using agricultural waste, making it one of the most sustainable materials available. As research and development continue, mycelium could play a key role in regenerative architecture.

6. Ferrock

Ferrock is an innovative material made from recycled steel dust and silica, often sourced from industrial waste. It hardens through exposure to CO₂, effectively trapping carbon in the process. Stronger than concrete and highly resistant to corrosion, Ferrock is ideal for marine and coastal applications.

Its ability to repurpose waste and sequester carbon makes it a compelling alternative to traditional cement-based products.

7. Straw Bales and Sheep’s Wool

Natural insulation materials like straw bales and sheep’s wool offer excellent thermal performance with minimal environmental impact. Straw bales are renewable, biodegradable, and provide high insulation values when used in wall systems. Sheep’s wool, a byproduct of the wool industry, is naturally fire-resistant, moisture-regulating, and recyclable.

These materials support healthier indoor environments and reduce reliance on synthetic insulation products.

8. Recycled Plastic and Glass

Plastic waste is a global crisis, but in construction, it can be part of the solution. Recycled plastic is being used to create durable bricks, tiles, and insulation panels. Similarly, recycled glass can be transformed into terrazzo flooring, countertops, and decorative finishes.

These applications not only reduce landfill waste but also give new life to materials that would otherwise pollute the environment.

9. Transparent Wood and Smart Glass

Innovative materials like transparent wood and smart glass are pushing the boundaries of sustainable design. Transparent wood, created by removing lignin from timber and infusing it with polymers, offers strength, light transmission, and insulation. Smart glass adjusts its tint based on sunlight, reducing the need for artificial lighting and cooling.

These high-tech materials enhance energy efficiency and occupant comfort while reducing operational emissions.

A GPRS Project Manager operating a 3D laser scanner with a tablet while inside an office space. — GPRS provides comprehensive subsurface damage prevention, existing conditions documentation, and construction & facilities project management services to ensure you avoid costly and potentially dangerous utility strikes when excavating or cutting or coring concrete.

How GPRS Helps You Reach Toward a Greener Future

The construction industry stands at a pivotal moment. By embracing sustainable materials, we can dramatically reduce the environmental impact of our buildings while creating healthier, more resilient communities. From bio-based composites to recycled industrial waste, the materials of the future are already here—and they’re reshaping how we build.

Regardless of what you’re building with, you need to know what you’re building on to ensure the success of your construction project.

GPRS provides comprehensive subsurface damage prevention, existing conditions documentation, and construction & facilities project management services to ensure you avoid costly and potentially dangerous utility strikes when excavating or cutting or coring concrete.

Utilizing non-destructive investigative technologies such as ground penetrating radar (GPR) and electromagnetic (EM) locators, our SIM-certified Project Managers show you what you can’t see so you can avoid damaging anything hidden below.

We can capture and document our utility and concrete mark outs using 3D laser scanners, and our in-house Mapping & Modeling Team can take this data and create accurate 2D and 3D maps and models based on your specific needs.

All this critical data is at your fingertips 24/7 thanks to SiteMap^® (patent pending), our infrastructure mapping software application that provides accurate existing conditions documentation to protect your assets and people.

GPRS Intelligently Visualizes The Built World^® to keep your projects on time, on budget, and safe.

What can we help you visualize?

Frequently Asked Questions

What Does GPRS Provide When Performing a Utility Locate?

Our Project Managers start by flagging and painting our findings directly one the ground on your job site. We find this method of communication to be the most accurate form when excavation is expected to begin within a few days of service.

Additionally, we use Real-Time Kinematic (RTK) positioning to collect data points of findings, which allow us to generate a plan, KMZ file, satellite overlay, or CAD file to permanently preserve results for future use.

All this data is at your fingertips 24/7 thanks to SiteMap. All GPRS clients receive complimentary SiteMap Personal access to their utility locate data.

Can GPRS locate PVC piping and other non-conductive utilities?

Yes! Using ground penetrating radar (GPR) in conjunction with electromagnetic (EM) locating, we’re able to fully map the buried utilities on your site.

New Owners Pledge to “Revive” Frank Lloyd Wright’s Price Tower as a Mixed-Use Property

Staying with a Frank Lloyd Wright building is as much about preservation and curation as renovation and maintenance

Note: This is the latest piece in our series on the fate of Frank Lloyd Wright’s only skyscraper, Price Tower. You can view the other articles in the series here and here.

“We don’t flip buildings, we bring them back to life.” – Macy Snyder-Amatucci, Brickhuggers, LLC

After several years of disputes and controversy regarding the building’s future and ownership, on May 5, 2025, Frank Lloyd Wright’s only skyscraper, Price Tower, was sold to McFarlin Building’s Brickhuggers, LLC, for what can only be called the bargain basement price of $1.4 million.

Price Tower, seen in the lower right of this photo, looms large in the town of Bartlesville, Oklahoma.

The copper-clad sentinel overlooking Bartlesville, Oklahoma’s downtown will see new life as the Price Tower Hotel & Residences after its planned two-year adaptive reuse/renovation project is complete.

A Passion for Preservation & Building Community

The father-daughter duo behind the project, John Snyder and Macy Snyder-Amatucci are passionate preservationists and Wright fans who are willing to put in the elbow grease to bring Price Tower back to its former glory. They have partnered with local rancher, Dale Forrest, who brought the project to their attention.

John Snyder, and Macy Snyder Amatucci, the father-daughter team dedicated to rescuing Price Tower, sit in its lobby in front of one of the many pieces of art Frank Lloyd Wright designed into his architectural vision. — John Snyder, and Macy Snyder-Amatucci, the father-daughter team dedicated to rescuing Price Tower, sit in its lobby in front of one of the many pieces of art Frank Lloyd Wright designed into his architectural vision. Photo Credit: Andy Dossett/*Bartlesville Examiner-Enterprise*.

“I think about that building when I go to sleep at night. It’s so cool. It’s truly one-of-a-kind,” Snyder told Architectural Digest in a recent feature about the duo’s efforts.

“Frank Lloyd Wright was definitely someone who didn’t conform. I always had a passion for his work – I am somebody who respects uniqueness and respects people that have the guts to be different in a world that you know isn’t always accepting of that,” Snyder-Amatucci told the Bartlesville Examiner-Enterprise.

What is the Plan for Price Tower?

The Price Tower renovation is budgeted for $10 million over a two-year period. The plan explicitly states the landmark building will not be fundamentally altered, but will be adapted as a mixed-use space featuring a boutique hotel and apartments, which actually is more in line with Wright’s original vision for the building. He designed it in 1928 as a New York apartment building, repurposing the design in 1952 as a mixed commercial and residential skyscraper for Harold C. Price, Sr., and erecting it in Bartlesville.

Wright’s own perspective drawing of Price Tower, ©2011 The Frank Lloyd Wright Foundation

Wright famously referred to Price Tower as “the tree that escaped the crowded forest,” and the cantilevered trunk and branch design is just one part of its bespoke natural design, where copper plays an enormous role, both inside and out.

The team has its work cut out for it. When they took possession, the power had been cut to the building and two feet of water was standing in the basement, which precluded the new owners from restoring power to pump it out. So, John Snyder donned his boots, rolled up his sleeves, and got to work, helping to clear the foundation of water while the electrical system was assessed to determine the extent of repairs necessary to turn the lights back on.

Turning the lights on is just one of thousands of tiny baby steps that must be taken to bring the building up to code so it can then undergo its transformation – into the livable dwelling structure it was initially designed to become. Any adaptive reuse project, especially adaptive reuse of historical buildings, requires careful reality capture, planning, concrete cutting and coring clearances for MEP updates and the moving of walls and windows, before imagination can become reality so that tenants and hotel guests can move in.

This is far from the first time Brickhuggers has rescued and revived a landmark building. They have successfully renovated more than two dozen aging landmarks. Their most famous historical building rescue to date was their flagship – Tulsa Oklahoma’s Mayo Hotel – which was orphaned for more than 30 years through six additional owners before Brickhuggers brought it back from the dead in 2009 with a $42 million renovation that “jumpstarted the revitalization of Downtown Tulsa.”

Their idea with Price Tower and Bartlesville is similar. Snyder-Amatucci, Snyder, and Forrest envision the iconic skyscraper as an architectural tourism destination for Wright fans, while creating a space the town can use as well. Brickhuggers’ plans also include the potential to reopen the rooftop bar that will restore the building’s top floor, restore the outdoor patio, and install a restaurant.

“We operate everything we build,” Snyder-Amatucci shared with the local Bartlesville paper. “We’re not doing these projects to flip them and sell them for a quick buck – we stay.”

What Part Does the Frank Lloyd Wright Building Conservancy Play in the Plan?

Staying with a Frank Lloyd Wright building is as much about preservation and curation as renovation and maintenance because the architect designed holistically; creating interiors that matched his vision, which often included walls, floors, furnishings, and other items, elevating the spaces to works of art. Many enthusiastic owners of Wright buildings have sunk millions into restoring his vision while integrating modern necessities. Quite a few work directly with the Frank Lloyd Wright Building Conservancy to remain faithful to his designs and materials.

Learn about fashion designer Marc Jacobs’ recently completed renovations to one of Wright’s Usonian homes, the Max Hoffman House in Rye, New York, here.

In the case of Price Tower, and other iconic Wright structures, the Conservancy has a say in what can and can’t be done – by law via a transferrable title easement covering all the museum-quality interior design spaces and pieces – a sticking point that the building’s previous owners, Green Copper Holdings, sought to circumvent.

Green Copper was accused in court of selling off a number of architectural elements and pieces that Wright designed for Price Tower, including a one-of-a-kind rolling directory board and the Shin’enKan gate, in violation of the Conservancy’s easement. In January of 2025, the judge overseeing the lawsuit brought by McFarlin Building, LLC to force Green Copper to comply with the building’s sale, ruled that any conservancy-protected items Green Copper had sold must either be returned or the proceeds from their sale remitted to the court.

The Shin’enKan Gate is one of several pieces from the Museum at Price Tower that the Conservancy and Brickhuggers are working to retrieve. Photo credit: Andy Dossett/*Bartlesville Examiner-Enterprise*

Brickhuggers and McFarlin Building are working directly with the Conservancy to locate all the items that were sold, particularly the gate, to fully restore the first-floor museum inside Price Tower. The Conservancy heralded the new owners in an official statement on their website, saying, “The Conservancy stands ready to offer support as they stabilize, restore, and revitalize the building.”

GPRS specializes in Intelligently Visualizing The Built World® for customers nationwide with reality capture, existing conditions documentation, damage prevention, and facility and project management solutions to help you plan, manage, and build better.

What can we help you visualize?

GPRS Video Pipe Inspection Services Document the Conditions of Underground Tunnels

GPRS Video Pipe Inspection services provided the client with the information they required, avoiding the need to send a person down the tunnels to investigate.

GPRS Project Manager Alec Bacon was tasked with investigating old drain lines for a client in Texas. The drain lines were essentially underground tunnels because of their size. The client needed to determine if their tunnels would accommodate another drain line being tied into the system.

Despite the tunnels being large enough for a person to investigate, the client wanted to take extra safety precautions and avoid putting their team at risk in a confined space.

“They didn't want to deal with the confined space and all that because it's a tunnel, basically,” Bacon explained. “It was, I want to say, more than 36 inches in height.”

As Bacon surveyed the area, he realized this was going to be one of the more unique VPI jobs he has ever done because of the location of the tunnels.

“So, it was under the plant basically,” Bacon explained. “We were in like a sub-basement to get to it on the other side and then there was the basement, then the building on top of it. It was just a really unique set up for what they had for access and where the pipe was.”

With nearly seven years of experience as a GPRS Project Manager, Bacon could acknowledge the uniqueness of this job and was up for the challenge.

“It wasn't one of those jobs where you drive up to the manhole, lower the camera, and there you go,” Bacon said. “It was one where we got to be real creative.”

A mainline crawler — All GPRS Project Managers are experts in utilizing CCTV cameras to investigate sanitary and storm sewers.

To assess conditions safely, Bacon used CCTV camera-equipped, remote-controlled crawlers to investigate the tunnels. The crawlers captured detailed photo and video evidence of the tunnels’ conditions.

“We ran it from both directions from the outside and then from that sub-basement, which got really interesting,” Bacon explained. “We took all the VPI equipment, went out of the back of the van, got it into that basement, and then ran an extension cord with us so we could run the crawler in that pipe.”

Once the inspection was completed, a detailed, NASSCO-compliant Video Pipe Inspection Report, detailing all tunnel conditions and defects including still photos and video via WinCan Web, was delivered to the customer digitally via SiteMap®. The client was happy with the information gathered and, because of SiteMap®, the client can access the findings 24/7 and have them readily available for reference during every stage of their renovation process.

Lastly, Bacon wanted to acknowledge and thank GPRS Business Development Manager Brian Barlow for his help.

“Brian Barlow and myself kind of worked together,” Bacon explained. “It was just a good example of sales and field coming together and being able to provide the best for the client.”

GPRS Video Pipe Inspection Services

GPRS is a trusted sewer inspection company that provides comprehensive, interactive reporting that details every inch of underground pipes to help clients plan repairs, maintain system integrity, and mitigate risk.

With tools like mainline crawlers, electromagnetic (EM) locators, and push cameras, GPRS Project Managers can inspect the hundreds of thousands of miles of water and sewer lines across the United States.

GPRS Project Manager using a push camera. — GPRS’ Video Pipe Inspection Services can provide solutions for the entire life cycle of your projects.

Some VPI services that GPRS offers include:

Cross bore mitigation
Mainline inspections
Manhole inspections
Sewer lateral inspections
Water & sewer system mapping
Dye tracing
NASSCO reporting
Inclination reporting
Utility locating

All GPRS VPI Project Managers are NASSCO-certified in PACP, LACP, and MACP, along with our required Subsurface Investigation Methodology (SIM) certification. NASSCO, or the National Association of Sewer Service Companies, sets industry standards for assessing, maintaining, and rehabilitating underground water and sewer infrastructure. GPRS Project Managers provide NASSCO Video Pipe Inspection Reports that provide the clients with interactive and comprehensive details and visuals of the inspection. All of this paired with GPRS’ 99.8% accurate utility scans will then be compiled and delivered digitally via SiteMap® for use or reference 24/7 and can be accessed on mobile devices with the SiteMap® mobile app.

GPRS also offers and strongly recommends annual sewer system inspections. Subsurface infrastructure is a world that you can’t see with the naked eye and requires the proper tools and training to properly assess. Sewer system inspections are important so you can update your existing conditions documentation, find new breaks, cross bores, and defects, plan repairs, and protect your system, facility, and community.

Another inspection program GPRS offers is Pre and Post-Cross Bore inspections. This program assesses pipe locations and conditions prior to the deployment of trenchless technology, and immediately following the installation of any new utilities via trenchless technology to mitigate the risk cross bores pose. Without a proper understanding of cross bores in your facility or campus, potential damages could cost thousands and possibly cost someone their life.

From sewer lines to skyscrapers, GPRS Intelligently Visualizes the Built World® to keep your projects on time, on budget, and safe. What can we help you visualize?

Frequently Asked Questions

What size pipes can GPRS inspect?

Our NASSCO-certified Project Managers can inspect pipes upwards of 2” in diameter.

What deliverables does GPRS offer when conducting CCTV drain surveys and other sewer pipe inspection services?

GPRS is proud to offer WinCan reporting to our Video Pipe Inspection clients. Maintaining sewers starts with understanding sewer condition, and WinCan allows GPRS Project Managers to collect detailed, NASSCO-compliant inspection data. GPRS Project Managers not only inspect the interior condition of sewer pipes, laterals, and manholes – they can also provide a map of their location. The GPRS Mapping & Modeling Department can provide detailed GPS overlays and CAD files. Our detailed WinCan/NASSCO reports contain screenshots of the interior condition of the pipe segments that we inspect, as well as a video file for further evaluation, documentation, and/or reference.

Laying the Foundation for Growth with GPRS

Growth starts beneath the surface. GPRS fuels your projects with the data needed to build safely and confidently from the ground up.

Before a project can reach new heights, it must be grounded in certainty. GPRS provides accurate data from below the surface to the top of the skyline, giving you a solid foundation for success.

Growth Begins Below the Surface

In construction, engineering, and infrastructure development, success starts with discovering what lays below. Before a single shovel hits the ground, understanding the subsurface environment is critical. With cutting-edge technology and a mission to eliminate subsurface damage, GPRS helps organizations lay the literal and figurative groundwork for safe, efficient, and scalable growth.

Whether you're building a skyscraper, expanding a hospital, or retrofitting a university campus, GPRS provides the clarity you need to move forward with confidence.

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GPRS Project Manager wearing a white hard hat and a red safety vest with 'GPRS' written on it stands at a construction site. Other workers are seen in the background working near equipment. — GPRS Project Managers deliver utility locating, concrete scanning, and subsurface mapping services to support safe and efficient construction projects nationwide.

The Hidden Risks Beneath Every Project

Every construction site hides a complex web of utilities, pipes, and structural elements. Striking a gas line, severing a fiber optic cable, or damaging post-tension cables can lead to:

· Costly delays

· Injuries or fatalities

· Regulatory fines

· Reputational damage

These risks are not just theoretical; they happen every day across the country. A big part of why GPRS exists is to prevent them.

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A Partner in Precision

GPRS is more than a service provider; we’re your strategic partner in project planning and risk mitigation. Our suite of services is designed to give you a complete picture of your site – aboveground and below-ground– so you can design and build with certainty.

Utility Locating

Using advanced ground penetrating radar and electromagnetic locating, GPRS identifies underground utilities with a 99.8% accuracy rate. This service helps teams dig safely, avoid costly utility strikes, and maintain project timelines.

Concrete Scanning

Before any coring or cutting begins, GPRS performs concrete scanning to detect embedded objects such as rebar, conduits, and post-tension cables. This ensures structural integrity and protects both workers and infrastructure.

With our Green Box Guarantee, you gain an added layer of assurance. When we mark an area with a green box, it means our experts have verified it as clear and safe to cut. This system gives your team the confidence to proceed, knowing that safety and accuracy are backed by industry-leading standards.

Video Pipe Inspection

GPRS uses robotic camera systems for video pipe inspection, allowing teams to assess the condition of sewer and stormwater systems. This service identifies blockages, cracks, and cross bores that could otherwise lead to costly repairs or project delays.
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3D Laser Scanning

With high-resolution 3D laser scanning, GPRS captures every detail of a site to create accurate digital twins. This data supports precise planning, clash detection, and seamless integration with Building Information Modeling(BIM) systems.
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Leak Detection

GPRS employs acoustic and thermal imaging technologies for leak detection, pinpointing hidden leaks in water systems. This proactive approach helps clients prevent water loss, reduce utility costs, and avoid infrastructure damage.

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Turning Data into Decisions

One of GPRS’ most powerful tools is SiteMap® (patent pending), a cloud-based GIS platform that stores and visualizes all subsurface and structural data collected on a site. Designed to bridge the gap between field data and actionable insights, SiteMap empowers you to plan, build, and manage better throughout every stage of your project lifecycle.

With SiteMap, clients can:

· Access real-time data from any device – whether in the office or on-site, users can instantly view and interact with utility maps, concrete scans, and 3D laser models.

· Share annotated maps with stakeholders – collaborate seamlessly with engineers, contractors, and facility managers using intuitive tools for markup, notes, and version control.

· Layer multiple data types – combine utility locating, concrete scanning, and 3D laser scanning data into a single, unified view for comprehensive spatial awareness.

· Plan future projects with historical context – maintain a digital record of all subsurface investigations and structural scans, enabling informed planning, risk mitigation, and compliance over time.

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Screenshot of utility data in SiteMap® — GPRS provided accurate utility locating and mapping services to help a contractor stay on time, on budget, and safe while installing water lines throughout a 150-acre community college. All collected data was securely stored and visualized in SiteMap®, giving the project team continuous access to critical subsurface information.

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More than just a data repository, SiteMap becomes a living asset, supporting long-term growth and maintenance:

· Preventative maintenance by identifying aging or at-risk systems before failure occurs.

· Regulatory compliance through accurate documentation and traceability.

· Capital planning by visualizing infrastructure needs and prioritizing investments.

· Emergency response with quick access to critical utility and structural information.

By turning complex field data into clear, actionable intelligence, SiteMap helps organizations reduce risk, avoid costly delays, and build with confidence.

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The SIM Advantage: Subsurface Investigation Methodology

Every project manager is trained in the Subsurface Investigation Methodology (SIM) – a process that standardizes how data is collected, interpreted, and reported.

SIM ensures:

· Consistency across all GPRS teams

· High-quality, repeatable results

· Confidence in decision-making
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This methodology is a key reason why GPRS has earned the trust of Fortune 500 companies, government agencies, and top-tier contractors nationwide.

Laying the Groundwork for Scalable Growth

Growth isn’t just about building bigger – it’s about building smarter. GPRS supports scalable growth by:

· Reducing rework and change orders
Accurate data upfront means fewer surprises later.

· Improving safety and compliance

Avoiding utility strikes and structural damage protects workers and meets regulatory standards.

· Accelerating timelines

With fewer delays and clearer planning, projects stay on schedule.

· Enhancing collaboration

SiteMap makes it easy for teams to work from the same data, no matter where they are.

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Real-World Impact: GPRS in Action

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Case Study: Compressor Station Protection

At a critical natural gas compressor station, excavation was planned for a new pipeline installation. GPRS was called in to perform utility locating and concrete scanning. Their team identified several unmarked utilities, including a high-pressure gas line that was dangerously close to the dig site. By mapping these utilities in advance, GPRS helped prevent a potentially catastrophic incident, saving the client from costly repairs, environmental damage, and operational downtime.

Screenshot of utility locating data. — GPRS located a plastic water line and electrical ground line within a 10,000 s.f. project area at a compressor station, where two large pieces of equipment were to be installed.

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Case Study: Nashville Restaurant Sewer Backup

A restaurant in Nashville was experiencing persistent sewer backups that traditional methods failed to resolve. GPRS deployed advanced video pipe inspection and utility locating technologies to investigate. They discovered a collapsed section of pipe and a misaligned connection that had gone unnoticed. With this insight, the restaurant was able to make targeted repairs, eliminating the issue and avoiding further health code violations and business interruptions.

Green dye introduced into the office cleanout seen in the storm drain with the CCVT crawler camera.

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Grow with Confidence

Growth is exciting – but it’s also risky. The best way to manage that risk is to start with a clear understanding of what lies beneath. GPRS gives you that clarity. From utility locating to reality capture, from leak detection to digital mapping, GPRS lays the groundwork for safe, efficient, and scalable growth.

Before you break ground, make the call. Because when you build on a foundation of accurate data, there’s no limit to how high you can go.

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FREQUENTLY ASKED QUESTIONS

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Why is subsurface data important before starting a construction project?

Subsurface utility locating detects underground utilities like gas, water, and electrical lines using GPR and electromagnetic locating. It prevents utility strikes, improves job site safety, and keeps projects on time and on budget.

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What makes GPRS different from other utility locating services?

GPRS combines advanced technology, a 99.8% accuracy rate, and a standardized Subsurface Investigation Methodology(SIM) to deliver consistent, high-quality results nationwide.

How does SiteMap® support long-term project success?

SiteMap® stores and visualizes all collected data in one place, enabling smarter planning, easier collaboration, and better decision-making throughout the project lifecycle.

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How to Safeguard Against Thermal Runaway in Lithium-Ion Renewable Energy Storage Facilities

The American Clean Power Association reports that utility-scale Lithium-ion battery storage capacity had grown to seven times its 2020 capacity by the end of 2023.

Lithium-ion batteries have become the backbone of renewable energy storage, offering high energy density and efficiency. However, they also pose risks that must be addressed in planning, particularly the risk of thermal runaway: a self-sustaining reaction that can lead to fires or explosions. Understanding the causes, prevention strategies, and emergency response protocols is critical for engineers and renewable energy providers in their quest to provide greener alternatives.

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Understanding Thermal Runaway

Thermal runaway occurs when a lithium-ion battery generates more heat than it can dissipate, leading to a rapid temperature increase. This process typically follows these stages:

Initial Overheating – Caused by overcharging, external heat exposure, or internal defects
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Electrolyte Breakdown – The flammable electrolyte, the organic material that provides the charge, decomposes, releasing gases
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Pressure Build-up – Gas accumulation increases internal pressure, deforming the battery casing
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Combustion or Explosion – If the casing ruptures, ignition can occur, leading to fire or explosion

Because large-scale LIB storage facilities utilize the modularity of the technology to build packs and modules with high storage capacity, thermal runaway has the potential of damaging entire power plants, if it occurs.

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Causes of Thermal Runaway

Several factors can contribute to thermal runaway:

• Overcharging – Charging beyond the recommended voltage increases internal heat

• Short Circuits – Internal or external short circuits create uncontrolled current flow

• Mechanical Damage – Punctures or deformation compromise battery integrity

• High Ambient Temperatures – Excessive heat accelerates electrolyte decomposition

Due to the extreme volatility and toxicity of thermal runaway in lithium-ion technology, it is imperative that all fire suppression safety measures be in working order. Although still under investigation, it was reported that Monterey County, California’s Moss Landing Power Plant fire spread, in part, due to a malfunctioning fire suppression system that failed to activate. However, the fire never reached beyond the boundaries of the facility.

Monterey-area residents filed suit in February of 2025, accusing Vistra Energy, LG Energy Solutions, and Pacific Gas & Electric of failure to maintain adequate fire safety at the facility, according to reporting in the Los Angeles Times.

That said, LIB storage facilities are reported to be safe, overall, and the American Clean Power Association reports that utility-scale storage capacity had grown to seven times its 2020 capacity by the end of 2023. So it is crucial that power plant engineers and renewable energy providers take all necessary steps to keep the risk of thermal runaway at bay.

Preventative Measures

Below is a partial list of the measures LIB storage system facilities managers and energy providers utilize to safeguard against thermal runaway.

1. Battery Management Systems (BMS)

A robust BMS monitors voltage, temperature, and current to prevent unsafe conditions

2. Thermal Management Solutions

Implementing cooling systems, phase-change materials, and heat sinks can dissipate excess heat

3. Proper Installation and Maintenance

Ensure adequate spacing between battery cells to prevent heat transfer
Regularly inspect batteries for swelling, discoloration, or leaks

4. Fire Suppression Systems

Deploying fire-resistant enclosures and automatic suppression systems can mitigate damage

Emergency Response to Thermal Runaway Events

The #1 rule according to the International Association of Fire Chiefs is NOT to attempt to enter any Energy Storage System Facility (ESS) during a fire, due to the extreme heat thermal runaway causes and the toxic fumes that can be released. That said, there are specific safety protocols that ESS facilities managers and utility providers can utilize to lessen a fire's impact.

1. Detection and Early Intervention

Use thermal imaging and gas sensors to detect early signs of thermal runaway
Isolate affected battery modules to prevent propagation

2. Fire Suppression Techniques

Water Mist Systems – Effective for cooling and suppressing lithium-ion battery fires
Dry Chemical Agents – Specialized extinguishing agents can neutralize battery fires

3. Evacuation and Containment

Establish clear evacuation protocols for personnel safety
Contain fires using fire-resistant barriers to prevent spread

GPRS and SiteMap: Supporting Renewable Energy Safety

GPRS can play a crucial role in helping renewable energy companies ensure the safety and efficiency of their projects. Through advanced ground penetrating radar (GPR) and electromagnetic (EM) locating technology, GPRS helps identify underground infrastructure, reducing risks associated with battery storage facility installations.

SiteMap® (patent pending), powered by GPRS, provides accurate, aggregated site data, enabling engineers to access real-time infrastructure information. This single source of truth enhances safety planning and risk mitigation for lithium-ion battery storage facilities.

Thermal runaway in lithium-ion battery storage facilities presents challenges for renewable energy providers. By implementing advanced monitoring systems, thermal management solutions, and fire suppression techniques, engineers can safeguard against catastrophic failures. The American Clean Power Association reports that only 20 fire-related incidents have occurred at ESS facilities in the last decade, while the industry has seen 25,000% growth.

Leveraging GPRS and SiteMap may ensure comprehensive site visualization, enhancing safety and operational efficiency.

GPRS Intelligently Visualizes The Built World® for customers nationwide. What can we help you visualize?

Construction Backlog Hits 20-month High

Construction backlog rose to its highest level since September 2023, according to a recent survey issued by the Associated Builders and Contractors.

The ABC’s Construction Backlog Indicator rose to a 20-month high of 8.7 months in April, according to the member survey conducted April 22 to May 6. The reading is up 0.3 months since April 2024 and continues a trend that’s seen backlog increase significantly over the past year for contractors with greater than $100 million in annual revenues.

Overhead view of construction workers on a jobsite. — Construction backlog rose to its highest level since September 2023, according to a recent survey issued by the Associated Builders and Contractors.

Backlog has also risen modestly for smaller contractors, although it is down on an annual basis for those with $30 million to $100 million in annual revenues.

ABC’s Construction Confidence Index reading for profit margins improved in April, while the readings for sales and staffing levels fell, though the outlook for sales is higher than a year ago. The readings for all three components remain above the threshold of 50, indicating expectations for growth over the next six months.

ABC Chief Economist Anirban Basu acknowledged that despite the record-level of backlog a significant number of members saw projects delayed or canceled in April due to tariffs.

“Nearly 22% of contractors had a project delayed or canceled in April due to tariffs, up from 18% in March, while 87% have been notified of tariff-related materials prices increases,” Basu said. “Contractors remain busy despite these headwinds; backlog rose in April and is now at the highest level since September 2023. While ABC members remain upbeat about the near-term outlook, the share of respondents that expect their sales to decline over the next six months rose to 19% in April, up 6 percentage points since the start of the year.”

Data center construction continues to dominate the construction industry. The Dodge Momentum Index, a 12-month leading indicator for construction spending specifically focused on nonresidential buildings, grew 0.9% in April predominantly thanks to data center ramp-ups. The DMI would have dropped 3% and commercial planning 2.3% were it not for those projects.

“Despite an uptick in April, the bulk of the DMI’s growth was driven by a surge in data center planning, while momentum in other nonresidential sectors lagged behind,” Sarah Martin, associate director of forecasting at Boston-based Dodge Construction Network, told Construction Dive. “Owners and developers are navigating heightened economic and policy uncertainty, which likely bogged down much of this month’s planning activity.”

Let GPRS Help You Stay On Time, On Budget, and Safe

When you’re dealing with a backlog of projects, the last thing you need is the delays caused by striking a buried utility.

But hitting a buried line while digging, or severing a conduit, post tension cable or rebar while cutting or coring concrete doesn’t just put your schedule and bottom line at risk. Subsurface damage can endanger the lives of your workers and anyone in the surrounding area.

GPRS mitigates the risk of subsurface damage through our utility locating and concrete imaging services. Utilizing state-of-the-art ground penetrating radar (GPR) scanners and electromagnetic (EM) locating, we provide you with accurate, actionable data about what’s hidden below your jobsite, so you can dig, cut, or core with confidence.

To make sure this field-verified data is securely at your fingertips 24/7, GPRS introduced SiteMap^® (patent pending). Accessible via computer, tablet or smartphone, SiteMap puts all the data our SIM-certified Project Managers collect on your site or campus into one single source of truth. So, whether you and your team are on-site or halfway across the world, you’ll be able to plan, design, manage, dig, and ultimately build better.

From skyscrapers to sewer lines, GPRS Intelligently Visualizes the Built World^® to keep you on time, on budget, and safe.

What can we help you visualize?

Please contact us to discuss the pricing and marking options your project may require.

Frequently Asked Questions

What do I get when I hire GPRS to locate utilities?

GPRS does not provide land surveying services. If you need land surveying services, please contact a professional land surveyor.

Enhancing Data Quality in the Construction Industry with Artificial Intelligence

Traditionally reliant on manual processes and human expertise, the construction industry is undergoing a significant transformation as more and more firms turn to artificial intelligence (AI) solutions.

As the industry generates vast amounts of data, the challenge lies in ensuring the quality, consistency, and usability of this data. AI offers innovative solutions to these challenges, promising to enhance data quality and drive efficiency across construction projects.

A man holds an iPad and looks out at a parking lot, where illustrations of utility lines are overlaid on the ground. — Traditionally reliant on manual processes and human expertise, the construction industry is undergoing a significant transformation as more and more firms turn to artificial intelligence (AI) solutions.

The Importance of Data Quality in Construction

Data quality is critical in the construction industry for several reasons:

Decision-Making: High-quality data enables accurate and timely decision-making, reducing the risk of errors and project delays.
Cost Management: Reliable data helps in precise cost estimation and budget management, preventing cost overruns.
Safety: Accurate data ensures compliance with safety regulations and standards, minimizing the risk of accidents.
Project Efficiency: Consistent and well-organized data streamlines project management processes, enhancing overall efficiency.

Despite its importance, the construction industry often struggles with data quality issues. Data is frequently siloed, inconsistent, and unstructured, making it difficult to derive actionable insights.

AI Applications in Improving Data Quality

AI technologies can significantly enhance data quality in the construction industry through various applications:

1. Data Collection and Integration

AI-powered tools can automate the collection and integration of data from multiple sources, including sensors, drones, and construction management software. These tools ensure that data is captured consistently and accurately, reducing the likelihood of human error. For example, AI-driven drones can capture real-time images and videos of construction sites, providing up-to-date data on project progress.

2. Data Cleaning and Validation

One of the primary challenges in the construction industry is dealing with incomplete or inaccurate data. AI algorithms can automatically clean and validate data, identifying and correcting errors, and filling in missing information. This process ensures that the data used for decision-making is reliable and accurate.

3. Predictive Analytics

AI can analyze historical data to identify patterns and trends, enabling predictive analytics. This capability allows construction companies to anticipate potential issues and take proactive measures to address them. AI can predict equipment failures based on historical maintenance data, allowing for timely repairs and reducing downtime.

4. Natural Language Processing (NLP)

Natural Language Processing (NLP), a subset of AI, can be used to analyze unstructured data, such as project reports, emails, and meeting notes. NLP algorithms can extract relevant information from these documents, converting unstructured data into structured formats that are easier to analyze and use. This capability is particularly useful for managing large volumes of documentation and ensuring that critical information is not overlooked.

5. Data Standardization

AI can help standardize data formats across different systems and platforms, ensuring consistency and compatibility. This standardization is crucial for integrating data from various sources and enabling seamless data exchange between stakeholders. By standardizing data, AI facilitates better collaboration and communication within construction teams.

6. Real-Time Monitoring and Reporting

AI-powered tools can provide real-time monitoring and reporting of construction activities. These tools can track progress, identify deviations from the plan, and generate real-time reports. This real-time visibility ensures that project managers have access to the most current data, enabling them to make informed decisions quickly.

Benefits of AI-Enhanced Data Quality

The integration of AI in improving data quality offers numerous benefits to the construction industry:

1. Increased Efficiency

By automating data collection, cleaning, and validation processes, AI reduces the time and effort required to manage data. This increased efficiency allows construction teams to focus on more value-added tasks, such as project planning and execution.

2. Enhanced Accuracy

AI algorithms are capable of processing large volumes of data with high accuracy, minimizing the risk of errors. This enhanced accuracy leads to more reliable data, which is essential for effective decision-making and project management.

3. Cost Savings

Improved data quality can lead to significant cost savings by reducing rework, preventing delays, and optimizing resource allocation. Accurate data enables better budget management and cost control, ultimately improving the financial performance of construction projects.

4. Improved Safety

AI-driven data quality improvements contribute to enhanced safety on construction sites. Accurate and up-to-date data ensures compliance with safety regulations and standards, reducing the risk of accidents and injuries.

5. Better Collaboration

Standardized and high-quality data facilitates better collaboration and communication among project stakeholders. AI enables seamless data exchange and integration, ensuring that all team members have access to the same information and can work together more effectively.

Challenges and Considerations

While AI offers significant potential for improving data quality in the construction industry, there are several challenges and considerations to keep in mind:

Data Privacy and Security

The use of AI in data management raises concerns about data privacy and security. Construction companies must implement robust security measures to protect sensitive data and ensure compliance with data protection regulations.

Integration with Existing Systems

Integrating AI tools with existing construction management systems can be complex and require significant investment. Companies must carefully plan and execute the integration process to ensure compatibility and minimize disruptions.

Skill Development

The successful implementation of AI requires a workforce with the necessary skills to operate and manage AI tools. Construction companies must invest in training and development programs to upskill their employees and ensure they can effectively leverage AI technologies.

Change Management

Adopting AI technologies involves significant changes to existing workflows and processes. Construction companies must manage this change effectively, ensuring that employees are engaged and supportive of the transition.

How GPRS Combines AI With Field-Verified Data to Help You Intelligently Visualize The Built World^®

GPRS utilizes artificial intelligence in conjunction with field-verified data to create accurate digital maps and models for use in AEC industries. While we believe in embracing innovative technologies, we complement those tools with our highly trained field staff and in-house Mapping and Modeling Department.

All the data we use to build the accurate 2D and 3D maps and models you need comes from our nationwide team of SIM-certified Project Managers, who utilize state-of-the-art infrastructure visualization tools such as ground penetrating radar (GPR), electromagnetic (EM) locating, 3D laser scanners and remote-controlled Video Pipe Inspection crawlers to provide you with a comprehensive understanding of your above and belowground infrastructure.

All this data is at your fingertips with SiteMap^® (patent pending), GPRS’ interactive infrastructure mapping software solution that provides you with accurate existing conditions documentation. Securely accessible 24/7 from any computer, tablet, or smartphone, SiteMap serves as a single source of truth for the accurate data you need to plan, design, manage, dig, and ultimately build better.

From skyscrapers to sewer lines, GPRS Intelligently Visualizes the Built World^®to keep your projects on time, on budget, and safe.

What can we help you visualize?

Frequently Asked Questions

How is A.I. and machine learning incorporated into 3D laser scanning?

After your site or campus has been documented with 3D laser scanners, CAD technicians will take the resulting point clouds and turn them into useful deliverables. Many software packages offer automated classification, or point grouping, or de-noising to quickly turn point cloud data to useful deliverables. In the industry of laser scanning, this process is called “artificial intelligence” or “machine learning”. Artificial intelligence (AI) refers to software that makes decisions or classifications that would have traditionally been made by humans, and machine learning refers to that software’s ability to get better at those tasks through repetition and training via human input and feedback.

What deliverables does GPRS provide?

We can provide 3D modeling in many formats such as:

Point Cloud Data (Raw Data)
2D CAD Drawings
3D Non-Intelligent Models
3D BIM Models
JetStream Viewer

Customizable Deliverables Upon Request

Aerial Photogrammetry
Comparative Analysis
Deformation Analysis
Digital Drawings of GPR Markings
Floor Flatness Analysis/Contour Mapping
New Construction Accuracy Analysis/Comparative Analysis
Point Cloud Modeling Training Webinars
Reconciliation of Clients 2D Design Drawings
Reconciliation of Clients 3D Design Model
Structural Steel Shape Probability Analysis
Template Modeling
Volume Calculations
Wall Plumb Analysis

Managing Mental Health Struggles in the Construction Industry

More than ever, workers in the construction industry are experiencing mental health struggles.

Working in construction poses many physical risks. However, the leading cause of death for construction workers is not from falls, harmful substance exposure, or other job site accidents, but from suicide.

The construction industry ranks among the highest in suicide rates compared to other professions and industries, according to the Centers of Disease Control and Prevention. In 2022, over 6,000 construction workers died by suicide.

The suicide rate of male construction workers is especially troubling. Over 5,000 male construction workers die from suicide annually, which is five times more than those who die from fatal work injuries. The CDC reported that 56 of every 100,000 male construction workers died by suicide in 2021, which is more than double the national average for adult males at around 23 per 100,000.

How Did We Get Here?

The declining mental health and rising suicide rate of construction workers is an issue that can’t be remedied with protective goggles, hats, and gloves. Protecting the safety of construction workers now goes well beyond their physical well-being.

Even though one in five construction workers struggle with anxiety, depression, and other mental health issues, less than 5% claim to see a mental health professional. The national average of those receiving mental health care among U.S. adults is at 22%, over four times the amount that construction workers report.

The effects of depression can have an impact on a person's physical performance and cognitive function. In a profession where precautions must be met to keep everyone safe, construction workers can’t risk being impaired on the job site.

As part of a round table on mental health in construction, Cindy DePrater, Senior Vice President of Turner Construction, said, “Research shows that 60% to 70% of all safety ‘incidents’ have some type of health or wellness issue as an underlying factor. When we show up on the job, we are bringing all parts of our personal lives – our relationships, home life, health issues, financial struggles or even a reliance on substances. And all these factors may impact our ability to do our work safely.”

To understand the deteriorating mental health of construction workers, it is important to understand the challenges they face every day as a guide to help find solutions.

Some challenges construction workers face are the long workdays and the physical demands of this profession. To combat long, tiring hours on site, balancing work with necessary rest is essential for workers’ physical and mental health. So, it is important to have sustainable work schedules.

Construction workers also have to endure the immense pressure of working in such an important industry. Without the construction industry and its workers, we wouldn’t have the roadways, buildings, and other vital infrastructure that keeps us connected and shapes our communities. Recognizing the weight that can be on these workers’ shoulders and utilizing stress management techniques can help construction workers cope with the pressure and anxiety associated with the profession.

Josh Vitale, Chairman of the Board for Construction Suicide Prevention Week and one of the founders of the GUTS project, has become heavily involved in the initiatives to reverse the course of suicide in the construction industry.

“It would be rare to find someone in the industry who hasn’t known a person that has taken their life within the last year or two,” Vitale said. “As an industry, we just keep putting more and more pressure on the worker to outperform what they’ve done before, and at some point, it’s just untenable.”

A group of GPRS Team Members putting their hands together in a circle — Two of GPRS’ Core Values are Mutual Respect and Safety, which are both necessary to build a healthy environment for workers’ physical and mental health

How Can We, at GPRS, Help?

As a sponsor of Construction Safety Week, GPRS is proud to support their safety initiatives which serve as an important reminder for industry leaders to highlight the critical connection between safety and mental well-being. During Construction Safety Week each year, GPRS offers complimentary safety presentations to teams of construction workers across the country. In those presentations, mental health awareness and suicide prevention are highlighted along with the importance of keeping everyone safe on a job site.

The most recent theme of Construction Safety Week was “All In Together – PLAN, OWN, COMMIT.” Not only are these great guidelines for personal and team safety plans, they are also great guidelines for mental health and suicide prevention.

Going “All In Together” for mental health awareness and suicide prevention helps construction workers realize they are not alone and don’t need to deal with their mental health struggles by themselves.

By planning out therapy appointments and time in a busy schedule for rest and activities that relieve stress, construction workers can make sure their mental health matches their physical health at the end of every day.

By owning the pressure and stress of working in the construction industry, workers can find the root of what causes them the most anxiety and can properly cope with the associated feelings.

And by committing to positive mental health practices the same way they commit to the job site protocols that protect them physically, construction workers can reverse the course of the growing issue of rising suicide rates in the construction industry.

If you or someone you know is struggling with their mental health, please take advantage of these resources, phone lines, and links:

National Suicide Prevention Lifeline: 1-800-273-8255
Crisis Text Hotline: Test HOME to 741741 to connect with a Crisis Counselor
Veteran Crisis Line: 1-800-273-8255 and Press 1 or https://www.veteranscrisisline.net/
Construction Safety Week: https://www.gp-radar.com/safety/csw
Construction Safety Week Mental Health Resources: https://www.constructionsafetyweek.com/safety-culture/mental-health-resources/
Construction Suicide Prevention Week: https://constructionsuicideprevention.com/
“Man Therapy” (self-screen for depression, anxiety, substance use, and anger) https://mantherapy.org/

GPRS is helping revolutionize the collection of subsurface utility data along active roadway corridors. Click here to learn more.

Missouri, Kansas Break Ground on I-70 Improvement Projects

Two states recently broke ground on multimillion-dollar projects to improve I-70.

Crews in Missouri are currently working on an I-70 extension project from Warrenton to Wentzville, while a joint venture in Kansas is overseeing the I-70 Polk-Quincy Viaduct project along a 2.5-mile stretch of the highway from Macvicar Avenue to 6th Avenue and local roadways in Topeka.

The work contract for Missouri’s project is worth $600 million: the largest single contract in the Missouri Department of Transportation’s history. This is the second project within MoDOT’s Improve I-70 Program and will see a third lane constructed in each direction from Warrenton to I-64 in Wentzville and the replacement of the existing I-70 lanes with new full-depth concrete pavement. A third lane of travel to eastbound and westbound I-64 between I-70 and Route K will also be added.

The project is expected to be completed in late 2028.

“Today marks another historic milestone in MoDOT’s efforts to Improve I-70,” Missouri Highways and Transportation Commission Vice-Chairman W. Dustin Boatwright said in a MoDOT press release. “This is a once in a generation opportunity to bring this transformative improvement to communities along I-70, the citizens of Missouri and those just traveling through.”

Rendering of the I-70 Polk-Quincy Viaduct project in Topeka, Kansas. — (Photo courtesy of Kansas DOT via *Construction Dive*) This rendering shows the I-70 Polk-Quincy Viaduct project in Topeka, Kansas. This is one of two major, ongoing projects to improve I-70.

The I-70 Polk-Quincy Viaduct project is being overseen by Bettis Koss Construction, a JV of Topeka-based Bettis Asphalt & Construction and Koss Construction Co. This $239 million project is being funded from the Kansas DOT’s Eisenhower Legacy Transportation Program, a 10-year, nearly $10 billion investment with the goal of improving Kansas’ transportation infrastructure.

The aging viaduct is being replaced to enhance safety, reduce congestion, and improve connectivity to surrounding communities, according to the project page. Construction is underway and expected to continue through late 2027.

“While the Polk-Quincy viaduct has served the community for over 60 years, we are investing in a modern and more efficient I-70 that will better serve residents, businesses, and visitors well into the future,” said Kansas Governor Laura Kelly. “This project reflects the priorities of the IKE transportation program, focusing on long-term solutions that benefit Kansans and support future economic growth in Topeka and beyond.”

“Breaking ground on the Polk-Quincy Viaduct project marks an important milestone for the State of Kansas, the City of Topeka, and the tens of thousands of motorists who travel I-70 daily,” added KDOT Secretary Calvin Reed. “Working together, KDOT and our partners are delivering a new corridor that will serve Kansans and travelers for generations to come.”

The State of America’s Transit Infrastructure

Investments such as those being made in Kansas and Missouri are playing a huge part in improving America’s road infrastructure.

The American Society of Civil Engineers (ASCE) recognized this in awarding America’s road infrastructure a D+ grade in its 2025 Report Card for America’s Infrastructure. While that’s by no means a stellar grade, it is an improvement from the D that the category received in the ASCE’s previous report card.

“Recent investments, including more than $591 billion since late 2021 from the Infrastructure Investment and Jobs Act (IIJA), are a positive step,” the ASCE wrote. “The nation’s roadways still face a $684 billion funding gap over the next 10 years. Sustained and robust infrastructure investment is needed to maintain and improve the roadway network for the future.”

Some 39% of major roads in the U.S. are in poor or mediocre condition, an improvement from the 43% recorded in 2020, according to the ASCE. Driving on deteriorated and congested roads still costs the average driver over $1,400 per year in vehicle operating costs and lost time, and the number of people dying on America’s roads remains high with 40,990 in 2023.

The ASCE also noted how extreme weather events are hampering attempts to maintain existing roads and plan future projects – and how the act of driving on these roads is exacerbating this issue.

“Transportation accounted for the most significant portion (28%) of total U.S. greenhouse gas emissions in 2022,” the organization wrote. “Most of these emissions (80%) came from cars and medium- and heavy-duty trucks. Rising temperatures, fires, flooding, erosion, and severe weather strain the nation’s roadways. In addition to planning and building resiliently for the future, state departments of transportation (DOTs) need to ensure their existing infrastructure can support daily operations and facilitate the movement of people evacuating areas affected by extreme weather events.”

A GPRS Project Manager pushes a ground penetrating radar cart across a construction site. — GPRS offers a comprehensive suite of subsurface damage prevention, existing conditions documentation, and construction & facilities project management services designed to help keep road improvement projects on time, on budget, and safe.

GPRS Helps Keep Road Improvement Projects on Time, on Budget, & Safe

GPRS offers a comprehensive suite of subsurface damage prevention, existing conditions documentation, and construction & facilities project management services designed to help keep road improvement projects on time, on budget, and safe.

We utilize state-of-the-art technology such as ground penetrating radar (GPR) scanners, electromagnetic (EM) locators, 3D laser scanners, and remote-controlled video pipe inspection crawlers to ensure the integrity of your buried infrastructure and help you avoid subsurface damage when breaking ground. Our in-house Mapping & Modeling Team can visualize the field-verified, accurate data collected by our SIM and NASSCO-certified Project Managers to suit your planning, and operations & maintenance (O&M) needs.

All this information is at you and your team’s fingertips 24/7, accessible via any computer, tablet or smartphone thanks to SiteMap^® (patent pending), our project & facility management application that provides accurate existing conditions documentation to protect your assets and people.

What can we help you visualize?

Please contact us to discuss the pricing and marking options your project may require.

Frequently Asked Questions

What type of informational output is provided when GPRS conducts a utility locate?

GPRS also uses a global positioning system (GPS) to collect data points of findings. We use this data to generate a plan, KMZ file, satellite overlay, or CAD file to permanently preserve results for future use. GPRS does not provide land surveying services. If you need land surveying services, please contact a professional land surveyor.

What types of concrete scanning does GPRS offer?

GPRS provides two specific but different scanning services: elevated concrete slab scanning and concrete slab-on-grade locating. Elevated concrete slab scanning involves detecting embedded electrical conduits, rebar, post-tension cables, and more before core drilling a hole through the slab. Performing a concrete slab-on-grade locating service typically involves scanning a trench line for conduits before conducting saw cutting and trenching to install a sanitary pipe, water line, or something similar.

Click here to learn more.

How To Cut or Core Around Banded PT Cables Safely

Striking a single PT cable can compromise structural integrity, create safety hazards, and cost up to $30,000 to replace. Banded PT slabs multiply the risks inherent with cutting concrete.

Post tension (PT) cables are used throughout the construction industry to reinforce concrete structures, providing the strength and flexibility that allows you to build bigger, build higher, and build more safely. Groupings of three to five PT cables are referred to as “banded.” Banded cables can significantly increase slab strength and are used in everything from elevator shafts to parking garages, and transfer slabs that have to bear loads over large spans.

A GPRS Project Manager Scans for PT cables and concrete other reinforcements on a parking garage pillar. He’s wearing a red GPRS safety vest, a white helmet, and gloves. He is holding a GPR device and watching his digital tablet for its readout. — Banded PT Cables are often found in or near pillars, columns, and other slab areas that need additional structural reinforcement.

Unfortunately, striking a single PT cable while cutting or coring can compromise structural integrity, create safety hazards, unwanted downtime for replacement and/or repair, and cost as much as $30,000 to replace. The hazards are only multiplied in a banded PT slab, where you risk cutting multiple cables.

The best way to mitigate the risk of a PT strike is to first detect all cables and bundles, conduit, and other reinforcements, and marking out all those reinforcements on the slab to ensure safe operations when you cut, core, or drill. For jobs where you need complete interior slab visualization, reality capture tools can be used to create 2D and 3D as-builts, if you have the appropriate training and technology.

Step 1: Understand Banded PT Cable Layout

Banded PT cables are grouped together in concentrated zones, typically in slabs over columns. They follow specific patterns, usually perpendicular to the uniform cables in the slab. Identifying these locations is crucial before performing any work.

What’s the Difference Between a Uniform and Banded PT Cable Layout?

PT Cables, also known as tendons, can be used as support throughout a slab in a “uniform” layout, spaced approximately 2-3 ft. apart. They are banded in three to five cable groups when more structural reinforcement is required, around pillars, elevator shafts, in transfer slabs, and in beam-supported slabs.

The photo below shows the complexity of a two-way post tension slab layout prior to the concrete pour. It shows both uniform and banded PT cables as well as other reinforcements.

A photo of a two-way post tension cable layout in a concrete slab before the pour. Includes rebar and other reinforcement.

Step 2: Gather Necessary Equipment

There are various methods of locating banded PT cables with advanced scanning technology:

Ground Penetrating Radar (GPR): Detects PT cables within concrete via radio waves and displays them as a series of hyperbolas on a screen. A highly trained concrete imaging professional like a GPRS SIM-certified Project Manager can interpret those hyperbolas to locate virtually every cable and other reinforcement with 99.8% accuracy.
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Electromagnetic (EM) Locating: Identifies embedded metallic objects and is often used in concert with a GPR scanner to verify results and be certain that everything in the slab is found. Subsurface Investigation Methodology, otherwise known as SIM, requires the utilization of complementary technologies – like using both GPR and EM locating to get the most comprehensive slab imaging available. Every GPRS Project Manager is required to be SIM-certified, which is the most rigorous training and education standard available in our industry. SIM level 101 certification requires 80 hours of classroom instruction and 320 hours of mentored field work.
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Concrete X-Ray (if applicable): Can provide precise imaging. However, it is often unwieldy to operate, requires significantly more time to develop imagery, and brings another level of risk – radiation – to an already risky job site.
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Chalk or Paint Marking Tools: Depending on your needs, marking tools may include spray paint, paint markers, chalk, or other temporary marking tools like carpet tack, paper, and tape in areas where the markings must be removable and not permanently damage the concrete.

Other methods of interior slab visualization, like tomography, are often used to assess structural deterioration and faults in concrete. They are significantly more expensive than GPR and EM locating methodology because they provide a level of detail that is not required to find PT cables and reinforcements.

Step 3: Perform Initial Site Evaluation & Gather As-Builts

Before scanning, review structural drawings if available. Look for:

PT cable layout diagrams, record drawings, or as-builts
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Core locations planned near support columns
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Any existing markings indicating prior investigations

In most cases, any existing documentation will be outdated or incomplete, so verification of as-built records will be required to ensure clearances. Verification is completed by scanning with GPR and EM locating devices, interpreting their findings and mapping/marking out the reinforcements on the slab surface.

A digital tablet displays a GPR concrete imaging readout, which display as hyperbolas. The GPRS Project Managers hands and one arm, clad in a black short sleeved shirt and safety gloves can also be see in the foreground. — GPRS Project Managers are highly trained in Subsurface Investigation Methodology to evaluate GPR and EM data to accurately locate PT cables and other subsurface structures in concrete slabs.

Step 4: Scan for PT Cables Using GPR

Calibrate the GPR based on slab thickness and material composition. This requires understanding dielectric values for concrete, which depend on the type of slab, the maturity of the slab, and its moisture exposure.
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Sweep the concrete surface in a grid pattern to detect embedded cables
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Identify banded PT cable zones: they will show as concentrated lines/hyperbolas in scans
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Verify findings with secondary methods like EM locating for accurate confirmation
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Mark detected cables with chalk or paint and label each band clearly

Step 5: Determine Safe Coring and Cutting Zones

Measure distance between cables to find clear spaces for coring
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Mark a buffer zone: Typically a minimum of three inches away from cables
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Align cutting or coring locations with confirmed safe zones
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Cross-check scan results with structural engineers if needed

GPRS is the only concrete scanning & imaging company that offers a “Green Box Guarantee” on its work. If our Project Managers mark a green box with “CLEAR,” that means we guarantee that the area is free of obstructions. If we get it wrong, we’ll pay for the material cost of repair. You can learn more about the Green Box Guarantee, here.

Utilizing Ground Penetrating Radar (GPR) and Electromagnetic (EM) Locating with Banded PT Cables

Banded post-tension (PT) cables are strategically placed in reinforced concrete structures, typically concentrated in load-bearing zones. To locate and safely work around them, professionals rely on Ground Penetrating Radar (GPR) and electromagnetic (EM) locating.

Understanding PT cable placement and utilizing multiple detection methods ensures accuracy in locating and marking these critical reinforcement elements before cutting or coring.

How to use Ground Penetrating Radar (GPR) for Banded PT Cable Detection

GPR is the most effective tool for mapping PT cables within concrete. It sends high-frequency radio waves into the slab and detects variations in material density, revealing embedded structures.

How GPR Identifies Banded PT Cables:

Scanning in a Grid Pattern – Operators systematically move the GPR unit across the concrete surface to ensure full coverage
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Signal Reflections and Data Interpretation – PT cables appear as hyperbolic curves in the radar scan due to their cylindrical shape. Banded cables will show as multiple strong, parallel curves clustered together
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Adjusting Depth Settings – GPR settings are optimized based on slab thickness (typically between 4” and 12”) to accurately detect cables and distinguish them from other embedded materials
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Marking Cable Locations – Once verified, cable positions are marked on the slab using chalk or paint for reference before drilling or cutting

Electromagnetic (EM) Locating for Additional Verification

While GPR provides precise visual mapping, EM locating helps detect live electrical conductors or metallic objects within the slab. This tool is particularly useful when:

The structure contains significant rebar interference, potentially affecting GPR readings
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Metallic PT cable sheathing needs further confirmation
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Locating high-voltage conduits embedded within the slab alongside PT cables

Other Locations Where Banded PT Cables Might Be Found

Although banded PT cables are primarily concentrated near columns and load-bearing walls, they may also be present in:

Transfer Slabs – Large spanning slabs distributing loads between multiple support points
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Parking Garage Ramps – Areas with increased stress due to traffic load require additional reinforcement
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Cantilevered Balconies – PT cables are often grouped near support edges to resist bending forces
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Beam-Supported Slabs – Where PT reinforcement aligns with primary structural beams
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Elevator Shaft Surroundings – Structural areas requiring additional reinforcement around mechanical openings

You’ve Scanned the Slab, Verified the Records, and Located Your Clear “Safe Zones.” Now, It Is (Finally!) Time to Cut

Once you have cross-checked and verified your clearances, you are ready to pierce the slab surface. There are specific, safe, “best practices” that are recommended for cutting and coring concrete. One of the most important safety practices has nothing to do with cables or reinforcements, but in keeping your team safe from respirable crystalline silica (RCS) and the incurable disease of silicosis, which breathing RCS can cause. You can learn more about the dangers of pinch points, kickback and RCS exposure during Concrete Sawing & Drilling Safety Week (CSDSW), which GPRS sponsors every winter. Learn more about CSDSW, here.

GPRS does not cut or core concrete as a service, but we work to keep concrete workers and their jobsites safe, each and every day. The steps below are those commonly taken when cutting & coring concrete.

Step 6: Execute Cutting or Coring Safely

Use proper PPE as outlined by OSHA
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Use equipment with water delivery, aka “wet” systems to help tamp down on silica dust exposure
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Use a low-vibration coring rig to reduce stress on surrounding concrete
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Start with a pilot hole to verify no immediate cable interference
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Monitor core depth to ensure cables remain undisturbed
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Proceed with full core drilling or cutting in marked safe zones

Step 7: Post-Cut Inspection and Documentation

Inspect the core site for signs of cable proximity or tension shifts
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Verify slab integrity post-cut to confirm no structural compromise
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Update site records with marked cable locations for future reference

When you utilize a project or facility management software solution like SiteMap^® (patent pending), powered by GPRS, uploading, versioning, and aggregating your concrete records becomes simple.

A portion of a brightly colored 3D BIM model showing columns, elevator shafts, and stairwells, as well as banded and uniform two-way PT cable layouts within a concrete slab. — GPRS can utilize reality capture tools in conjunction with concrete imaging to provide detailed 2D maps and 3D BIM models of the interior of post-tensioned concrete slabs.

We can provide tailor-made data solutions for even the most densely banded PT slabs, including capturing our mark-outs via 3D laser scanning or photogrammetry, and using that 2-6mm accurate data to create a full 3D BIM model of everything that is inside your slabs. Learn more about how SiteMap can help keep your concrete jobs safer, here.

Final Considerations

It is advisable to consult structural engineers before cutting PT slabs if you are not confident of what’s inside your concrete
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Avoid assumptions: scan every location regardless of existing markings & documentation
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Use multiple detection methods for accuracy in identifying banded PT cables

Safely working around post-tension cables ensures structure longevity and worker safety. Proper detection, marking, and cutting techniques prevent costly errors and hazards. Hiring a professional concrete scanning company like GPRS can help. It’s our mission to Intelligently Visualize The Built World® for our customers. What can we help you visualize?

Frequently Asked Questions

What is Subsurface Investigation Methodology?

Subsurface Investigation Methodology (SIM) is the most rigorous subsurface certification in the industry. SIM allows GPRS to ensure a standardized approach for locating underground utilities and scanning concrete structures. It combines expert training, advanced technology like ground penetrating radar (GPR), and proven field methods to ensure accurate, non-destructive investigations. SIM enhances site safety, prevents damage, and improves accountability in construction projects. Learn more here.

How can reality capture be used to create BIM models of concrete slab interiors?

GPRS can use reality capture technologies like 3D laser scanning and photogrammetry to create precise BIM models of concrete slab interiors. The technology is used to accurately capture GPRS’ 99.8% accurate concrete mark-outs, which can be converted into digital 3D models for design, analysis, and construction planning. This process minimizes errors and improves efficiency. Explore further here.

How GPRS Helped Protect a Compressor Station from Subsurface Damage

When GPRS was tasked with locating and mapping buried utilities prior to the installation of heavy equipment inside a pipeline compressor station, we found more and less than what the client expected.

When GPRS was tasked with locating and mapping buried utilities prior to the installation of heavy equipment inside a pipeline compressor station in Ohio, we found more – and less – than what the client expected.

Project Manager Matt Higginbotham was originally tasked with locating a single water line running through a 10,000 s.f. area at the station where two heavy pieces of equipment were to be installed. Striking this plastic line while excavating to install the equipment or crushing it under the weight of the structures would have resulted in costly repairs and interruptions to the station’s operations. So, it was vital that the client knew the exact location of the line prior to beginning work.

An existing as-built drawing of the station, however, indicated the possibility of a second water line in the project area. At this point, the client realized they needed a comprehensive understanding of everything buried under the site.

“The customer asked that all potential utilities be located in the area – not just the water line,” Higginbotham said.

Higginbotham deployed both ground penetrating radar (GPR) and electromagnetic (EM) locating to locate and map the buried utilities.

GPR scanners emit radio waves into the ground or a surface such as concrete, then detect the interactions between those waves and any buried objects. These interactions are displayed as hyperbolas on a GPR readout, with each hyperbola varying in size, color and shape depending on what was located. GPRS Project Managers are specially trained to interpret this data to tell you what was located and its approximate depth underground.

EM locators detect the electromagnetic signals radiating from metallic pipes and cables, or from tracer wires attached to non-metallic utilities. The locator’s transmitter can apply a current to the pipe or tracer wire or, if the utility in question is a live electrical cable, detect its current flow. Signals can also result from a conductive pipe acting as an antenna and re-radiating signals from stray electrical fields.

At the compressor station, Higgenbotham was able to verify the location and depth of the plastic water line using his GPR scanner. He then verified his findings with his EM locator.

These same tools helped him locate an electrical ground line in the project area. Higginbotham marked out the location of both utilities on the ground using spray paint, and he used real-time kinematic (RTK) positioning to geo-locate his findings to create up-to-date drawings of the buried infrastructure.

A gravel field with green spray paint indicating the location of an electrical ground line. — The green markings seen here indicate the location of an electrical ground line.

“[Now] the client can safely excavate or shift the locations of the structures for their upcoming project,” Higginbotham said.

The Project Manager also confirmed that there was not a second water line within the 10,000 s.f. zone, despite what the client’s existing as-built records indicated.

“[This suggests] their as-built drawing may be incorrect,” Higginbotham said.

While accurate as-builts are vital for documenting the existing conditions of a building or site, the reality is that your existing as-built drawings are likely out of date or incomplete due to changes that occurred during the initial construction process or later renovations and repairs.

And not knowing what’s below before you dig is the quickest way to cause costly and potentially dangerous utility strikes.

That’s why it’s vital that you hire a professional utility locating company like GPRS to fully map and mark out the utilities in your project area prior to conducting any excavation activities.

Because our client at the compressor station had an accurate understanding of their buried infrastructure before digging, they were able to avoid any unwanted surprises.

From locating buried water lines and electrical cables to documenting entire skyscrapers, GPRS Intelligently Visualizes The Built World^® to keep your projects on time, on budget, and safe.

What can we help you visualize?

Frequently Asked Questions

What informational output do I receive when I hire GPRS to conduct a utility locate?

GPRS also uses real-time kinematic (RTK) positioning to collect data points of findings. We use this data to generate a plan, KMZ file, satellite overlay, or CAD file to permanently preserve results for future use. GPRS does not provide land surveying services. If you need land surveying services, please contact a professional land surveyor. Please contact us to discuss the pricing and marking options your project may require.

Can GPR locate PVC piping and other non-conductive utilities?

GPR scanning is exceptionally effective at locating all types of subsurface materials. There are times when PVC pipes do not provide an adequate signal to ground penetrating radar equipment and can’t be properly located by traditional methods. However, GPRS Project Managers are expertly trained at multiple methods of utility locating.