UTILITY SURVEYS

PAS128 Utility Surveying

UTILITY SURVEYS

OVERVIEW

Non-invasive underground utility surveys and mapping services from Central Alliance provide a comprehensive understanding of what lies below the ground, by the use of various geophysical techniques. Our services will contribute towards the seamless planning and execution of your construction or site investigation project, to aid compliance with best practice (HSG47) and to protect your employees.

SURVEY

Equipment

We provide comprehensive utility surveys using the very latest technology and methodology. Electromagnetic locators (using both passive and active techniques) enable us to locate metallic services such as power cables, cast iron mains and various telecommunication cables.

Ground penetrating radar (GPR) systems enable us to validate electromagnetic location findings and to locate the non-metallic utilities that can go undetected by the use of electromagnetic locators alone. GPR techniques can also be used to detect underground features including: air voids, water, metal, concrete, and layers in the ground (geology).

This information is then mapped and a CAD file is produced which clearly show all the utilities present.

The benefits from obtaining accurate information prior to work commencing on site or during any project are:

  • safety – reduced risk to workers and public
  • minimising risk of damage to existing utilities
  • ability to better plan service diversion requirements
  • minimising project delays
  • a permanent record is provided for use in site management and future development.

EXPERIENCE

We have over 15 years of experience in locating and mapping buried services and our surveyors are at a minimum QCL Level 3 qualified (or working towards this qualification). All our surveys are compliant with PAS 128 standards in utility surveying and drawings include information on the location, depth and alignment of all buried services in order to try and establish the location of the following:

  • gas, water, electricity and telecommunication services.
  • non-metallic services
  • voids, tunnels, cellars and foundations
  • disturbed and/or saturated soil
  • other potential hazards or obstructions.

SURVEY

PAS128 Utility Surveying

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