North City Arterial Main (NCAM)

Uisce Éireann is progressing works to install a strategic trunkmain servicing the northern area of Dublin City.

Uisce Éireann is installing 5.5km of strategic trunkmain in the Clontarf area of Dublin City and neighbouring Fingal area as part of the North City Arterial Main (NCAM) project.

Once complete, the NCAM will be a critical piece of infrastructure for cross city water transfers between reservoirs in Ballymore Eustace and Leixlip.

This project will involve the construction of two separate trunkmains at the following locations:

• James Larkin Road/Dublin Road between Causeway Road and Bayside Boulevard South Junction, including Greendale Road and Thornville Road
• Clontarf Promenade between Hollybrook Road and The Woodenbridge

These new trunkmains will be connected with existing mains between Fairview Park and Hollybrook Road and the Woodenbridge and Causeway Road to complete the NCAM scheme.

This project is critical to ensuring a secure and reliable drinking water supply to homes and businesses in North Dublin. It is a key project to help realise Government’s proposed target of 300,000 homes by 2030.

When complete, this project will support social and economic growth in North Dublin City.

• Enable the delivery of 12,000 new homes in the North Dublin area.
• Reduce interruption to supply to 160,000 properties.
• Improve pressure and resilience to 29,000 existing homes between Clontarf and Howth Head.
• Protect old/brittle mains in Clontarf/Donnycarney. 

Completion of the North City Arterial Main Scheme will link supplies at Leixlip and Ballymore Eustace Water Treatment Plants for customers in North Dublin, providing greater resilience and security of supply.

The current phase of works includes the construction of a trunkmain along James Larkin Road/Dublin Road, between the Causeway Road and Bayside Boulevard South junction, as well as on Greendale Road and Thornville Road. These works are being delivered by GMC Utilities Group on behalf of Uisce Éireann.

James Larkin Road works

Over 1.2km of new water main has been installed along the James Larkin Road and pipe laying works in this area are now complete with final connections currently being completed.

We wish to advise that the current southbound lane closure on James Larkin Road will now be extended until mid-July to facilitate the safe completion of the remaining reinstatement works in this area. The closure will remain in place 24 hours a day, 7 days a week, with existing traffic management arrangements unchanged.

This extension is primarily due to delays in completing concrete reinstatement works. These delays have arisen as a result of a combination of factors, including poor weather conditions, additional works required to address sections of soft ground, and necessary kerb replacement.

Emergency access will be facilitated throughout the lane closure period.  

We appreciate that this extension may cause frustration for road users and the local community, and we are working to minimise further disruption wherever possible. 
 

Greendale Road and Thornville Road works

Pipe installation works on Greendale Road and Thornville Road are due to commence from Monday 29 June 2026. The pipeline works in this area will take approximately 4 months to complete.

The works will be delivered in phases under a STOP AND GO traffic management system which will be in place 24 hours a day, 7 days a week. Works will start at Greendale Road/St Margarets Avenue junction and will continue towards Thornville Road. Working hours are 8.00am to 7.00pm, Monday to Friday. Some weekend works may be required.

Please see map below for location of works. Access for residents, property holders and emergency access will be facilitated throughout the works.

Letter drop will be carried out in the community over the coming days to notify residents and businesses of the upcoming works.

We will continue to keep you updated as works progress.
 

Uisce Éireann is actively engaging with key stakeholders and the local community and will continue to do so throughout the project. GMC Utilities Group has a dedicated Community Liaison Officer (CLO) who can be contacted on 085 8541594.

We would like to thank the local community, for their patience and ongoing support while we continue to deliver water services for Ireland for the benefit of current and future generations.

Works on the Clontarf Promenade between Hollybrook Road and The Woodenbridge are expected to commence in 2027.

Details of any planned supply interruptions associated with this project will be updated on the Water Supply Updates section of the Uisce Éireann website and stakeholders affected will get advance notice.