Growth and Development Programme - Maynooth Transfer Pipeline Project

Uisce Éireann is delivering a project to upgrade the wastewater network to enable growth and development in Maynooth and Kilcock.

The Maynooth Transfer Pipeline Project involves the construction of a pipeline between the existing Maynooth Wastewater Pump Station and Leixlip Wastewater Treatment Plant. Upgrade works are also required to the Maynooth Wastewater Pump Station.

This project is being delivered to support existing and future developments within the community.  Construction of the new pipeline along with the required upgrade works to the Maynooth Wastewater Pump Station will improve the capacity of the existing wastewater network in the area, improving performance and reducing demands on the current network.

The project, representing a €24 million investment, will create additional capacity in the wastewater network to enable the delivery of an additional 11,500 housing units.

The works are being carried out on behalf of Uisce Éireann by Coffey Construction and are expected to be completed in 2027.

• Construction of 8.9 kilometers of new sewer pipeline from Maynooth Wastewater Pump Station at Dunboyne Road, to Confey in Leixlip.
• Upgrades to the existing Maynooth Wastewater Pump Station.
• In addition to upgrading the wastewater network, Uisce Éireann is also installing a new water main on Confey Road. These works are being undertaken simultaneously with the Maynooth Wastewater Transfer Pipeline project. 4.3km of water main is being installed as part of the first phase of work. Road closures will be the same as Maynooth Transfer Pipeline, where there is overlap.

The benefits of these wastewater network works include:

• Supporting social and economic development – This project will facilitate social and economic growth, including planned residential development.
• Improving the wastewater network – This project will upgrade the wastewater network, increasing the capacity to deliver reliable, sustainable high-quality wastewater services for the community.

Maynooth WW Transfer Pipeline:

• To date, 8.20 km of the 8.9 km is complete, with 0.70 km in road remaining. 

Confey Road Watermain Upgrade - Phase 1

• 3.6 km of the 4.3 km watermain has been installed, with 0.70 km remaining in the road. 

Road Closure 3 (L1015 Kellystown Closure)

3.3km (ongoing - to 30 June 2026). 3.15 km complete (as of 23/06/2026) 

Road Closure 5 

Kildare County Council has granted the temporary closure on the R149 (from the L5052 Junction at Cullaghreeva to the R419 at Royal Canal Amenity Group) from Wednesday 1 July to Tuesday 28 July 2026. 

Important clarification on the closure notice: 

• This is a full temporary road closure for the duration of the works.
• Works will run 24 hours a day, 7 days a week to complete the works as quickly as possible.
• The road will be reopened as soon as the works are finished.
• Alternative diversion routes will be clearly signposted
• Emergency access and restricted local access will be maintained 

Diversions will be in place as follows: 

Northbound on the R149 (from Captains Hill / Kildare side) 

Traffic will be diverted via the R157, R149, R835 and R148. 

• Proceed north-west on the L1015 to the junction with the R157.  
• Turn right onto the R157 and continue towards Dunboyne.  
• At the junction with the R149, turn right and continue southbound.  
• Follow the R149 to the junction with the R835.
• Follow the R835 until the junction with the R148
• Turn right onto the R148 and continue westbound.  
• Rejoin the L1015 diversion route. 
   

Permanent Reinstatement: To be agreed with KCC and complete by late Q1 2027 (i.e. 6 months after last road closure temp. surface). These works will be completed under one lane closure reducing traffic impact.

Uisce Éireann understands that this type of work can be inconvenient and works crews will make every effort to minimise any disruption these necessary works cause. We would like to thank the community for their ongoing patience and cooperation as we work to deliver this essential project.

Coffey Construction’s Community Liaison Officer can be contacted at 086 060 2775 with any queries or concerns relating the project works.

Uisce Éireann can also be contacted at 1800 278 278. Please reference Maynooth Transfer Pipeline when calling and details of your query will be assigned to a dedicated point of contact on the project.