Burbo Bank

£4 million contract for an on-shore substation as part of the £100 million Burbo Bank wind farm extension. Sub-contracted by Balfour Beatty and DONG Energy, Brenig were responsible for infrastructure, including drainage, reinforced concreting and access roads.

About This Development

Building a Gas Insulated Substation (GIS) from the ground up requires significant organisation and coordination. Multiple contractors from all over the world were working at the site, so directing everybody’s efforts was crucial. Using the ROC model, movements were plotted on a map of the site so access could be prioritised and allocated where it was needed, ensuring the site was running at maximum safety and efficiency at all times. Getting the drainage and access right was critical for the future functioning of the GIS. The basement needed to be watertight and access roads had to hold up to heavy usage over the facility’s lifetime.


Balfour Beatty




Denbighshire, N. Wales


Civil Engineering

How We Helped:

Brenig’s role in the process was to provide civil engineering capability and carry out groundworks across the site, as well as bringing our high standards in health and safety. This included helping to design a bespoke groundwater solution for the basement of the GIS. Brenig also constructed the drainage system, access roads and ducting, and were responsible for all reinforced concreting across the site.

The Impact & Results:

We completed the project on time, within budget, and to the required quality, with the project winning multiple awards for the high standards of health and safety that were maintained throughout the build. Investment in the local economy was a key consideration of this project and we monitored our supply chain and where our workforce was drawn from, to ensure the area would benefit from such a significant project. 

Weeks work experience for apprentices
Percent of expenditure spent with North Wales Businesses

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