3D Manhole Inspection Technology: How MACP Inspections Are Evolving
April 28, 2026
When it comes to sewer infrastructure, out of sight should not be the same as out of mind. Hidden deterioration inside manholes can quietly lead to system failure, resulting in expensive repairs and unexpected disruptions. What you can’t see beneath the surface stands to cost you the most if issues remain undetected. That’s why Manhole Assessment Certification Program (MACP) inspectors from the National Association of Sewer Service Companies (NASSCO) play such a critical role in maintaining underground infrastructure like sanitary and storm sewer systems for municipalities and industrial facilities.
CCTV manhole inspections have long offered a valuable look inside aging infrastructure, giving trained technicians the ability to identify defects and assess overall condition in real-time. But today’s 3D manhole inspection technology provides more comprehensive insight into structural issues. Combining artificial intelligence with high-resolution imaging and enhanced data analysis allows for detailed decision-making. Discover how 3D manhole inspection technology helps municipal and industrial planners detect issues sooner, extend the life of sewer infrastructure and budget for cost-effective manhole rehabilitation.
Why Manhole Inspections Are Critical For Sewer Infrastructure
Manhole inspections are essential to maintaining the performance and reliability of sewer infrastructure. Routine inspections help identify structural issues, deterioration and potential failure points early, allowing municipalities and industrial facilities to address problems before they escalate and cause a shutdown or major damage.
Otherwise, common issues like inflow and infiltration become key concerns, straining wastewater collection systems, reducing capacity and contributing to backups or flooding if left alone. To ensure your infrastructure is protected, you need the best technology operated by experienced technicians to accurately assess conditions and guide next steps.
What Is A 3D Manhole Inspection?
A 3D manhole inspection builds on traditional CCTV inspection methods by capturing a high-resolution view of the manhole structure, detecting deficiencies as small as 1mm in size while assessing the entire interior surface. The level of detail allows for more accurate measurements and a clearer understanding of structural deterioration.
Inspection technology is often paired with artificial intelligence tools like SewerAI, which automatically pinpoints defects in real-time while a certified MACP technician maneuvers the camera. This allows technicians to focus on evaluating the overall condition of the manhole while still capturing comprehensive inspection data that can be used for future planning and budgeting. MACP inspectors are specially trained to utilize software to analyze data and make informed decisions about manhole rehabilitation.
Features like interactive video playback mean inspections can be completed twice as fast with full access to inspection data upon conclusion. Everything is backed up and stored for future evaluation. These enhanced efficiencies result in time and money saved while also ensuring reliable long-term infrastructure performance.
How 3D Manhole Inspection Technology Works
A 3D manhole inspection uses advanced camera technology paired with artificial intelligence to capture and analyze the full condition of a manhole in real time. A certified technician inserts a tiny 3D camera into a pre-existing access point, maneuvering it throughout the structure while high-resolution imaging and integrated software work together frame by frame to identify and document defects. Technology like SewerAI enhances this process through automated defect recognition, measuring and recording issues including cracks, offset joints, root intrusions and buildup as the inspection takes place.
Benefits Of 3D Manhole Inspections
Compared to traditional CCTV methods, the benefit of 3D manhole inspection technology is faster inspections while simultaneously achieving greater accuracy and more complete data. Certified inspectors use this data to help municipalities and industrial facilities move quickly from assessment to action with smarter, more cost-effective manhole rehabilitation recommendations. Technicians have the expertise to determine the most relevant findings for their report, supporting strategic long-term planning by identifying rehabilitation priorities based on what will enable the lowest long-term costs and highest overall performance.
Manhole Inspection Reports: What You Get From An MACP 3D Manhole Inspection
Manhole inspection reports should clearly outline identified manhole deficiencies and determine severity based on MACP certification standards. The best reports will include photos, location details and repair recommendations so the customer has a complete understanding of what should come next. Using innovative software like Pioneer by SewerAI, technicians evaluate the manhole structure in segments to easily visualize impacted areas and formulate solutions for the structure as a whole.
At HK Solutions Group, we go above and beyond by spelling out a full cost estimate for the recommended repairs with a discount available if you choose our team to remedy issues. We make the decision easy because only the most cost-effective, logical solutions are presented to help our customers proactively maintain and improve essential infrastructure.
Common Problems Identified During Manhole Inspections
Routine manhole inspections don’t always result in action items, but they do allow for regular reconsideration and monitoring of potential problem areas so there are never any surprises down the line. Some of the key issues most commonly identified include:
- Inflow and infiltration
- Structural issues
- Cracks and leaks at joints
- Small repairs
- Areas to watch
Inspectors who’ve taken the time to develop a better understanding of a manhole’s condition should be ready to work with their customers to immediately address major concerns. Whatever HK finds during an inspection, we always factor our customers in and only proceed with the best solution collectively identified by the team and customer.
Manhole Rehabilitation Solutions Based On Inspection Results
Depending on the severity and urgency of any issues detected, manhole rehabilitation professionals may move forward with solutions ranging from targeted repairs for problem areas to fully structural rehabilitation within existing sewer infrastructure. For maximum savings and longevity, potential fixes include:
Structural Manhole Rehabilitation
HK is a huge proponent and provider of trenchless manhole rehabilitation solutions, which allow fully structural liners to strengthen the manhole from within with no digging required and minimal disruption to ongoing operations. These applications are best for crumbling structures that need substantial work to be restored to fully function. HK’s 100% corrosion-resistant Monoform PLUS™ manhole rehabilitation solution can provide longevity equivalent to a full replacement but with a much quicker turnaround and lower associated costs.
Joint Grouting
If a leaky joint is looking to cause trouble, pressure-injected chemical grouts can permanently seal against inflow and infiltration. For budget-conscious customers, this is a quick fix for a potentially serious issue if left unaddressed.
Manhole Repairs
Sometimes there’s only a few problem points within a manhole that don’t call for more extensive rehabilitation. This is often the case for conducting bench and invert repairs. In these instances, it’s most effective to perform strategic repairs rather than fully restoring the manhole. HK relies on our unique long-lasting fiberglass lining to reinforce flow within the sewer system.
How Proactive Planning & Ongoing 3D Manhole Inspections Actually Save You Money
For those tricky “areas to watch,” often the best course of action is paying attention. That means undergoing routine MACP 3D manhole inspections to prevent further escalation and receive professional support as needed. Protecting infrastructure through routine inspections prevents severe sewer damage, inopportune shut-downs and costly bills. Plus, because 3D technology enhanced by artificial intelligence improves accuracy and speed, manhole inspections are even more cost-effective in the moment, getting the job done quickly. The less time a technician has to spend on an inspection, the more money customers save, and the quicker lasting solutions can be put in place!
As an added benefit of 3D manhole inspections, all inspection data can be saved and revisited at a later date so customers can wait for a better time to proceed with potential rehabilitation without having to pay for another inspection. Infrastructure improvements can be scheduled over time once the full scale of the potential problems are understood and prioritized as needed. If manhole rehabilitation isn’t a feasible option, small repairs can be made in the meantime to help increase the manhole’s lifespan. Once a budget is prepared to take on longer lasting rehabilitation solutions like manhole lining, the structural improvements restore manhole integrity equivalent to replacing the manhole outright, but without the costly time and disruption needed to dig up critical infrastructure.
Contact HK For An Innovative 3D Manhole Inspection
Since partnering with SewerAI in 2022, HK has completed pipeline inspections and stormwater assessments spanning millions of linear feet, making our partnership the first in the world to have achieved this milestone. Our highly trained team members are equipped to operate the most advanced technology in the industry, translating to time and money saved for manhole rehabilitation projects, every time. To get started with HK’s state-of-the-art 3D manhole inspection services, fill out our contact form today.
Get Started With HK