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.

Delivered through Uisce Éireann's national Growth and Development Programme, the project represents a €24 million investment, and will provide the required wastewater network capacity to enable the development of an additional 11,500 housing units in Maynooth and Kilcock.

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

• Construction of 8.9km of new sewer pipeline from Maynooth Wastewater Pump Station at Dunboyne Road, to Confey in Leixlip.

• Upgrades to the existing Maynooth Wastewater Pump Station.

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.

1. L1015 Closure – Extension to 15 May 2026

Kildare County Council has approved an extension of the temporary road closure on the L1015, from the L1014 junction at Kellystown to the R149 junction at Captain’s Hill, until Friday, 15 May 2026. 

To facilitate the next phase of works on the R149 (as detailed below), this route will temporarily reopen between Monday 30 March and Sunday 12 April 2026 before closing again until the extended end date. 

To minimise disruption to road users, traffic will be maintained from the L5051 until works approach this area. Notification of works commencing at this section of road, between the L5051 junction and Captain’s Hill, will be provided in advance.

L1015 Kellystown Closure - Diversion Routes

For general traffic on the L1015:

Westbound traffic:

• The closure begins at the L1015 / R149 junction. Traffic will divert left onto the R149 (Captain’s Hill) and continue to Leixlip Main Street. From there, follow Main Street to the L1014, then turn right and continue until you rejoin the L1015 beyond the closure.
• The section of the L1015 from the junction with the L5051 to the junction with the R149 will remain open to traffic until works approach this area.

Eastbound traffic:

• The closure begins at the L1015 / L1014 junction at Kellystown. Traffic will divert onto the L1014, then turn left onto the R148. Continue on the R148 to the R149 (Captain’s Hill), turn left, and follow this route to rejoin the L1015 beyond the closure.

For HGVs:

• HGVs travelling east: 
  HGVs will be diverted via the R157, following the signed route through Castlefarm, Summerhill and Bennetstown roundabouts. Traffic will then continue via the M3 junctions, R147 and R156 before joining the R149 (Clonee Road), which will bring drivers to the end of the road closure.
• HGVs travelling west: 
  Westbound HGVs will follow the R149 before diverting onto the R156 and onwards to the R147 and R157. The diversion continues via Bennetstown, Summerhill 

All diversion routes will be clearly signposted, as agreed with the Council and An Garda Síochána. Emergency access and restricted local access will be maintained at all times.

Standard working hours are 7:30am to 6pm, Monday to Friday. 

Works may involve planned interruptions to water supply. Customers will be notified in advance of any planned water outages.

2. R149 Closure – 30 March to 10 April 2026

Coffey Construction have applied to Kildare County Council for a road closure at the R149 to facilitate the next stage of pipelaying works, as follows:

R149, from the junction with L1015 at Captains Hill, to the L5052 junction, Confey from Monday 30 March to Friday 10 April 2026.

This road closure has been scheduled to coincide with school Easter holidays, to minimise disruption. Works will be carried out 24/7. As noted above, the L1015 (from the L1014 junction at Kellystown to the R149 junction at Captain’s Hill) will re-open during this time.

Any objections/observations can be submitted via Kildare County Council’s online consultation portal before 5:00 p.m. on the Tuesday 10 March 2026. 

Diversion Routes

Westbound on the R149 (from Dublin) 

Traffic will be diverted via Dunboyne and Kellystown.

• Stay on the R149 through Barberstown Lane and Ongar.
• At the R156, turn left and continue to the L2228.
• Follow the L2228 into Dunboyne and join the R157.
• Continue on the R157 for 5km, then turn left onto the L1014 at Kellystown.
• Follow the L1014/L1015 for approx. 5km to rejoin the R149 at the end of the diversion.

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

Traffic will be diverted via Kellystown and Dunboyne.

• Turn onto the L1015 towards Kellystown and continue onto the L1014.
• At the R157, turn right towards Dunboyne and continue for 5km.
• At Dunboyne, take the L2228 and continue to the R147.
• Turn onto the R147, then rejoin the R149 at the next junction.
• Follow the R149 back through Ongar and Barberstown Lane to the end of the diversion. 

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.