Cork City Water Supply - Western Trunk Watermain

Irish Water is progressing with significant upgrades to the water network across Cork City.

Irish Water, in partnership with Cork City Council, is working to improve the security of water supply across Cork City through the delivery of three projects. This significant investment involves the construction of additional strategic watermains, replacement of existing watermains and upgrades to multiple pumping stations supplying drinking water from the Lee Road Water Treatment Plant. Farrans Construction is delivering these three projects on behalf of Irish Water.

Irish Water is working proactively with our delivery partners and as part of a multi-agency working group to ensure that our construction works are carried out in a controlled and safe manner, in keeping with Government and HSE guidelines to protect workers, their families and the broader community.

In Progress

Irish Water is upgrading Cork City trunk watermains to increase security of supply and reduce leakage of large strategic mains in Cork City.

This project involves the construction of a 5.5km link between the Cork City Water Supply Scheme and the Cork Harbour and City Water Supply Scheme, as supplied from Inniscarra Water Treatment Plant. This watermain will provide additional water supply capacity to Cork City by providing a strategic connection between the water supply schemes and will provide necessary headroom, to facilitate growth and also increase security of supply.

What is involved as part of this project?

As part of this project Irish Water will:

  • Connect to an existing 1500mm diameter city and harbour trunk (city ring) main at Curraheen.
  • Construct a new 5.5 km trunk main connecting to the Cork City WSS at Lee Road Water Treatment Plant.
  • This project will include a crossing of the River Lee and critical road arteries into Cork City.
  • Connect to the Lee Road Water Treatment Plant and new pumping regime and into existing network.

What are the benefits of this project?

The works carried out as part of this project will:

  • Provide security of supply to Cork City
  • Provide necessary additional water supply capacity
  • Facilitate growth and development of Cork City

Details of upcoming works:

LocationStart dateDurationPlanned WorksTraffic Management
Road to Model
Farm Road
19 July 2021 3 months Installation of trunk main, including river crossing N/A

Works in the field south of Carrigrohane Road will commence on Monday 20th of Sept. and will continue throughout the week. Works will continue in the fields south of Carrigrohane Rd until Model Farm Road is reached.

Western Trunk Main pipeline route from the Carrigrohane Road towards the Model Farm Road

Stakeholder Engagement

We will endeavour to keep all stakeholders, businesses and residents informed in advance of the commencement of this project and as this essential water supply scheme progresses. Further details on the timelines shall be provided in the coming weeks.

For any further queries, there is a dedicated Information line available 24/7 at (047) 39999 and project email at

Frequently Asked Questions

What are the working hours?
Monday to Friday, 8am to 6pm.

Will access to the Lee Fields carpark be affected during the works?
No, there will be no access restrictions to the carpark during the works.

What will be done with topsoil removed as part of preparatory works?
Topsoil will be temporarily stored within the works area and will be used to reinstate the area following installation of the pipeline.

How will the works area be secured?
All excavated areas will be securely fenced off.

Will trees need to be cut down?
No, tree removal will not be required as part of these works. Minor branch cutting works were completed in early June to ensure a safe working space for works. A survey was carried out by a qualified Ecologist who determined that this activity falls under the exemption described in Section 40 (2) (e) of the Wildlife Act (exemption from the prohibition on vegetation cutting in the course of road or other construction works).

What was done with the mulch from the cut branches?
Mulch was given to Field of Dreams / Down Syndrome Cork at the Clash Road as part of their raised beds and vegetable garden projects.

Will the pedestrian walkway along the Lee Fields be affected?
No, the works will not have any impact on the pedestrian walkway running along the Lee Fields.

How will the excavated areas be reinstated following completion of works?
The area will be topsoiled using the original topsoil and seeded back to grass. This will be completed by the end of September 2021. Full reinstatement with established grass regrowth is expected in Spring 2022.