SERVICES

PAS 128 Underground Utilities Detection

We locate the presence or absence of underground services on sites using ground probing radar (GPR) and electromagnetic equipment.

Anybody wishing to dig, should by law (HSE regulations), know what services are located below, before breaking ground. Powers underground utilities detection surveys will provide you with comprehensive services locations to the required PAS 128 British Standard.  They show the position, type and depth of live, abandoned or redundant service networks based on PAS 128 Quality Levels agreed in advance.

Quality Assured PAS 128 Surveys

PAS 128 is a best practice specification in the gathering of underground services data, transformed into detailed drawings or models that show the location of services underground. Underground service locations can be identified to any of the PAS 128 Quality Levels based on survey type, location accuracy, inclusion of post-processing and level of supporting data. We can work with you to determine which Quality Level can be achieved in advance of the site survey.

PAS 128 Quality Levels D, C, B, A:

Survey Level Survey Type Relative Location Accuracy Relative Cost
D Desktop Utility Records Search Lowest Lowest
C Site Reconnaissance Medium Low Medium
B Detection Medium High Medium
A Verification Highest Highest

Key Benefits

  • Complies with PAS 128:2022 quality levels D, C, B and A
  • Powers can locate underground electricity, gas, water, sewer, cable and telecommunications services
  • Allows the communication of the constraints of the underground services environment
  • Ensures health and safety of contractors and the public, by reducing time spent on site and the risk of harm from service strikes
  • Knowledgeable about anomalies such as reinstatement scars, indicating where previous street works have been carried out
  • Utility damage minimised through clear service location identification and a clear understanding of service adoptions and diversions
Powers team conducting an underground utility survey

Deliverables

  • Robust, reliable 2D or 3D sub-surface surveys
  • Collation and on-site analysis of statutory records/guide drawings
  • Electromagnetic devices locate and map metallic or live buried services
  • Use of GPR establishes position and depth of non-metallic, fibre optic and plastic buried services
  • Production of a topographical base plan illustrating the position of the underground services, if requested
  • Accurate, scaled, colour coordinated presentation of the site as it exists
  • Production of a survey report outlining confidence levels

Powers provided us with comprehensive and accurate topographical surveys, on what was an extremely complex area. The information contained in these surveys, including the elevations details, all help us understand the area – and how it can be successfully transformed for future generations – as part of the regeneration project.

Sam Ainsley Associate Director, Jon Matthews Architects

Get in touch

Need a quote or some more information? Call 01928 734 473 or send us a message via the form.

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