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 as part of the Cork City Water Supply Scheme. Farrans Construction is delivering these three projects on behalf of Irish Water.

Western Trunk Watermain 
Eastern Strategic Trunk Watermain
Shanakiel Watermains Upgrades 

We are upgrading Cork City trunk watermains to increase security of supply and reduce leakage of large strategic mains in Cork City.

Western Trunk Watermain
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.

In Progress

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 dateEnd datePlanned WorksTraffic Management
Eastern end of Lee Fields 10 January 2022 22 December 2022 Installation of new watermains Site access traffic signage in place

Commissioning & Reinstatement works have commenced along the route of Western Trunk Watermain. The area is outlined in blue on figure 1 below.

Figure 1: Commissioning and reinstatement route

Work Area at the eastern end of the Lee Fields

Stakeholder Engagement

Farrans Construction has a full time Stakeholder Liaison Officer on the contract who is available to address and queries or concerns in relation to the works.

Contact details: Lucy Peters (047) 39999 or

For updates on the works please visit website project pages listed above.

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.

We apologise for any inconvenience caused during the construction works on this essential project. We will endeavour to keep all stakeholders, businesses and residents informed as this essential water supply scheme progresses.

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.