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PAS 128 utility mapping yorkshire
Underground Scanning
PAS 128 Compliant Utility Surveys Across the UK
A PAS 128 utility survey is the industry-recognised standard for detecting, mapping, and verifying underground utilities. It provides accurate information on the location, depth, and type of buried services, helping to reduce risk, improve safety, and prevent costly strikes during excavation and construction.
At Tri-Tech Surveys, we deliver PAS 128 compliant utility mapping surveys across the UK, supporting construction, engineering, infrastructure, and development projects of all sizes.
What is a PAS 128 Utility Survey?
Do I need a Utility Map for a new build home?
It depends on the local regulations and requirements in your area. In some cases, a utility map may be required for new construction projects, while
What is Utility Mapping?
Utility mapping is the process of locating, identifying, and mapping underground utilities such as water and sewage pipes, electrical and communications cables, gas lines, and
Why PAS 128 Utility Mapping is Important
Unknown or inaccurately mapped underground utilities pose a major risk to construction and excavation works.
A PAS 128 survey helps to:
Reduce the risk of utility strikes
Improve health and safety on site
Prevent service disruption
Avoid costly delays and repairs
Support safe excavation and design planning
PAS 128 Survey Categories Explained
PAS 128 defines four survey categories, depending on the level of detail and verification required:
PAS 128 Type D
• Desk study using existing utility records
• No site investigation
• Lowest confidence level
PAS 128 Type C
• Site survey using surface geophysical techniques
• Detection of utilities without verification
PAS 128 Type B
• Combination of geophysical survey
• Utilities are positively identified
PAS 128 Type A
• Direct measurement of exposed utilities
• Highest confidence and accuracy level
Tri-Tech Surveys will advise on the most appropriate PAS 128 survey type based on your project scope, risk level, and site conditions.
What Our Utility Surveys Include
utility mapping
3d Modelling
By using our 3D modelling techniques, a contractor would be able to install new services by using trenchless technology, which can give huge cost savings over more traditional installation methods. Any services detected on site are identified using spray paint, which can aid in reading the plans on site. We can complement this service by also offering you a full CCTV Integrity Survey. Site developments or extensions often require in-depth knowledge before they can be considered, and we can provide plans that will far outlast the development in question.
Detection and mapping of underground services
Utility depth and positional data (where achievable)
Classification of utilities by PAS 128 type
Clear annotation of survey confidence levels
Integration with topographical surveys (if required)
CAD drawings and PDF plans
Survey Methods & Technology
We use a range of advanced detection techniques, including:
Electromagnetic location (EML)
Ground Penetrating Radar (GPR)
Cable avoidance tools (CAT & Genny)
Combining multiple methods ensures the most accurate and reliable results possible under PAS 128 guidance.
Why Choose Tri-Tech Surveys?
PAS 128 compliant surveys delivered by experienced professionals
Integration with topographical and engineering surveys
Clear, reliable, and well-presented outputs
Practical advice from initial enquiry to final delivery
Nationwide UK coverage
Fast turnaround times
Get a Quote for PAS 128 Utility Mapping
Land and Engineering Surveyors
topographical surveys
Tri-Tech work for a variety of different clients on different projects, and we pride ourselves on delivering accurate, efficient, cost effective surveys ensuring our clients receive the best possible product.
utility mapping
Using the latest equipment, we can provide the location of underground services in either 2D or 3D. We use state of the art Ground Penetrating Radar and Electromagnetic Location to assist your project when service avoidance may be a potential issue on site.
monitoring
Is there any movement? That is the question that is asked before and during any monitoring scheme. That is the reason we undertake monitoring, to check for movement.
laser scanning
For mass collection of accurate survey data then nothing beats scanning. Using 3D laser Scanners the surveyors can capture millions of points per second with the creation of a PointCloud.
volumetric analysis
We specialise in the analysis of a scheme’s volumetrics at any point in time. Be it Tender, Prestart, Monthly, Weekly, or Final.
Bathymetric surveys
By using the latest surveying technology, we have been able to survey watercourses safely and efficiently.
setting out & site engineering
Bread and butter work for us! Having a strong relationship with many civil engineering companies we have a very strong team of Site Engineers and Engineering Surveyors working for us.
control network installation
At Tri-Tech we have vast experience in this field. Be it a large highway scheme or a private property we can advise on what accuracies are required from your control network depending on what work you are carrying out and the tolerances you are carrying this work out to.
uav mapping & aerial surveys
Large areas of ground can be covered capturing the most unbelievable detail which would just be unable to be recorded with traditional methods. Our clients have really seen the benefit of what UAV surveys bring to the table.
measured building surveys
Tri-Tech work for a variety of different clients on different projects, and we pride ourselves on delivering accurate, efficient, cost effective surveys ensuring our clients receive the best possible product.
3d machine control
Machine control systems have been around for years now and Tri-tech have been utilising these systems from the very start. We realised the benefits of these systems early on when working with earthworks contractors.
survey equipment hire
Being a leader in the Surveying and Engineering sector we have a fleet of modern survey equipment at our disposal which is second to none. We carry the latest GNSS Base Stations, GNSS Rovers, Robotic Total Stations, Laser Scanners, Digital Levels, and Dual Grade Lasers.
BIM Model Creation
BIM (Building Information Modelling) model creation in surveying refers to the process of using specialised software to create a 3D digital model of a building or infrastructure project that includes information about the project’s design, construction, and maintenance.
Virtual Tour 3D
Virtual Tour 3D is an immersive experience which instantly transports your clients to your business, and guides them through your space, creating a seamless and captivating experience.