Underground Utility Mapping (PAS 128 Survey)

What is Underground Utility Mapping (PAS 128 survey)?

Underground utility mapping is a geophysical survey conducted by surveyors to detect underground utilities and map them on 3D digital models.

We use Ground Penetrating Radar (GPR), Electromagnetic Location (EML), and total station topography to accurately link utilities to national grid coordinates.

Using non-invasive techniques, sub-surface utilities like electric cables, gas and sewage pipes, fibre optics and drainage systems are detected and mapped.

The accurate data we collect provides construction teams reassurance that building plans can go ahead safely and efficiently, with minimal risk of complications or compliance breaches.

Survey types for your project

Under the UK standard, PAS 128:2022 (Specification for Underground Utility Detection, Verification and Location), utility surveys are categorised into four different survey types:

1. Type D surveys act as a prerequisite to all other survey types. They involve reviewing existing utility record maps and are best used for early-stage planning or initial risk assessments.
2. Type C surveys take the records from the previous survey and conduct a surface-level visual inspection of the site. They are best used for verifying the accuracy of what was discovered during Type D and confirming whether further inspections are needed.
3. Type B surveys consist of a full utility mapping survey and can only be carried out after Type D and C are complete. They are best used for deep foundation planning and Construction (Design and Management) compliance.
4. Type A surveys provide a visual identification of utilities through various methods to provide the highest level of confidence in utility surveying. They’re best used for high-risk excavation sites and resolving spatial conflicts between project designs and existing utility works.

Sectors we support best

Construction

PAS 128 surveys provide construction sites with data that prevents the striking of electric lines or gas pipes when carrying out deep excavation.

Energy

We use underground utility mapping to cover vast stretches of land and map existing grid connections, supporting the safe start-up of new green power sources.

Healthcare

We locate decades-old utility networks below hospitals and healthcare buildings so that renovation work can be carried out with confidence.

See how we provide the necessary data for the structural development of the Northumbria Specialist Emergency Care Hospital.

Infrastructure

We support infrastructure projects prepare for junction realignments and trackside infrastructure by locating buried utilities and old drainage systems.

Supporting your project

Unmapped utilities pose safety and financial risks to any project, regardless of the sector.

By partnering with Academy Geomatics, your project gains a reliable, expert team that’s dedicated to providing your site with the data it needs to keep work sites on track.

Get in touch with us today for more information or to discuss how we can assist your next project with our underground utility mapping.

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