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Using ground-penetrating radar (GPR) and electromagnetic locators (EML), Rock Surveying can detect, trace and map buried utilities to confirm their exact location in the vicinity of proposed boreholes and excavations.

Recommended for the pre-construction phase, Borehole Clearance provides the opportunity to identify potential underground obstacles, prevent utility strikes and determine suitable locations for trial holes. 

In suitable ground conditions, the Rock Surveying team can also locate deeper structures that often cause an issue in construction, such as sewers and foundations, saving time, cost and resource as the project commences. 

Borehole Clearance/Spot Clearance Survey


BSI PAS128 surveying is a British Standard methodology for utility surveys in the UK. 

Giving a more detailed result than standard surveys (solely through GPR or EML), PAS128 provides a more robust methodology for utility surveying, which is then delivered to clients in a CAD drawing. 

A combination of different methods, PAS128 locates and identifies services through ground-penetrating radar (GPR), electromagnetic location (EML) and also trial pitting, with holes dug by hand or through vacuum excavation. 

PAS128 Utility Surveying


An essential step in new build projects, utility surveys must be carried out to locate, identify and map out any underground services. Once this has been completed, construction can be started without danger of utility strikes.

With a full area-based survey, new connection points can be identified for utility services within the building project, and an updated record can be created for the future, showing where utilities lie.

The Rock Surveying team are experienced in delivering fast, efficient and accurate utility surveys at construction phase, supporting the prevention of utility strikes and resulting workforce injuries and project delays. 

Utility Surveying at Construction Phase


Drainage mapping provides accurate information of drains and sewers under a proposed site, including how building features will connect with drainage works. 

As buildings are constantly being changed, up-to-date property plans can be hard to come by. A full drainage mapping utilities survey provided by Rock Surveying, will provide a comprehensive image of the utilities of a proposed building.

In the case of a spill onsite, emergency drain tracing can be carried out to aid in draining the construction site and minimising risk to the project.

Drainage Mapping


CCTV drainage surveys are also used to assess the drainage capabilities of a site or proposed location. CCTV drainage surveys can identify issues such as leaks, cracks, corrosion or blockages to a building’s drainage works and ascertain conditions of drains and why blockages may be happening.

The results from a CCTV survey can be provided in various formats including PDF, CAD drawings and video reports. These are usually delivered to you within 48 hours of the site inspection has been carried out



Desktop utility searches are carried out as part of due diligence when researching a project and are

used to gain as much information as possible on the existing utilities under a proposed site. 

This can be created from previous survey results and existing CAD drawings from developments.

Obtaining one report also saves contacting multiple independent providers.

Desktop Utility Searches


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