Wicklow Water Supply Scheme


ByrneLooby were appointed consultants for the design and provision of the Wicklow Water Supply Scheme infrastructure, which will become the primary source of water supply to Wicklow town and its environs. The scheme will serve a population which will almost triple from its current level to 37,800 in the forthcoming years. It will serve this population by bringing additional supply from the Vartry WTW via a new water main to the new Wicklow infrastructure.

The project required ByrneLooby to design a crossing of the Vartry River. The challenge here was to minimise the environmental impact due to the Vartry being an EU protected Salmonid river and therefore it was necessary that any river crossings would consider the protection of fisheries. This constraint, coupled with complex ground conditions and restricted access to land due to landowner issues, resulted in the project requiring the development of appropriate tunnelling methods. This ensured it would have the least possible effect on the local area and the river, therefore protecting the environment. The presence of the 18th century Nun’s Cross Bridge, a protected structure, also heightened the challenge as it was crucial that no damage was inflicted during the works. This element of work arose after the project had been awarded, therefore it was necessary to have ongoing contractor interaction to identify the most appropriate method and the most cost-effective solution for the client

The project also involved connecting to the existing Dublin City mains from Vartry WTW to South Dublin, a critical piece of infrastructure. The exercise required careful management in conjunction with Dublin City Council, due to the risk of impacting water supply to South Dublin.

Another client concern was the need to manage interaction with local land owners. ByrneLooby ensured that elements agreed between the client and local landowners were incorporated fully into the works and that, when onsite, work done was to a level acceptable to the landowners.



“Throughout this project I was exposed to a number of unusual elements, including the tunnelling techniques and complex water pressure management. The experience of working on the project and overcoming these challenges, as well as working on such a large scale contract, will prove extremely useful to me in future projects.”

Ed, Project Engineer

Project Photos