Project Overview

Cork Lower Harbour is world renowned. It has a rich maritime history and a proud industrial tradition. It supports employment, fosters tourism and provides many opportunities for water-based activities. Cobh, Passage West, Glenbrook, Monkstown, Carrigaline, Shanbally and Ringaskiddy are just some of the areas that border the Harbour.

The Cork Lower Harbour Main Drainage Project is required to significantly enhance the water quality in Cork Harbour. Currently, wastewater from Cobh, Carrigaline, Passage West/Monkstown and Ringaskiddy is discharged untreated into the Harbour.

The Cork Lower Harbour Main Drainage Project provides enhanced wastewater treatment through the development of a new wastewater treatment plant at Shanbally County Cork. The Project is important in terms of protecting the environment, facilitating economic development and providing for a growing population. Operations commenced at the new treatment plant at the end of December 2016, providing full treatment of all wastewater from houses and businesses in Carrigaline, Crosshaven and Shanbally.  When the project is complete, the plant will also serve the areas of Cobh, Passage West/Monkstown (including Glenbrook) and Ringaskiddy (including Shanbally & Coolmore).

In addition to this, the need for a wastewater treatment plant for Cork Lower Harbour is a requirement under both European and National legislation in order to improve health, integrity of the environment and improve water quality in compliance with the European Union’s Urban Wastewater Treatment Directive. The Cork Lower Harbour Main Drainage Project will ensure that these water quality standards set down by regulatory bodies will be achieved, which will help Ireland to avoid substantial financial penalties.

The Project also has a positive impact on the local economy and community, as improved water quality increases the amenity value of the Lower Harbour, and acts as a platform for social and economic development.

The Project includes built-in resilience in order for the wastewater infrastructure to be able to accommodate the increase in local population.

What works are involved in this Project?

The Cork Lower Harbour Main Drainage Project consists of:

  • A new Wastewater Treatment Plant
  • 14 new pumping stations
  • Approximately 30km of new sewers
  • A drilled crossing under the estuary

News and Updates

Current Roadworks : Week starting Monday 24 April 2017

LocationRoad closures

Ringaskiddy (including N28)

No road closures required

N28 between Shanbally and Ringaskiddy

No road closures required

 Fr. O’Flynn Park, Passage West

No road closures required

Monkstown carpark

No road closures required

Irish Water would like to thank residents in advance for their patience and cooperation and to apologise for any inconvenience caused.

Open evenings

The project team continue to meet with the community to keep residents and businesses informed. Open evenings were held on 23 February and 2, 13 and 14 March to update the Cork Lower Harbour communities on upcoming construction works.

We will continue to hold additional events throughout Cork Lower Harbour and members of the project team are available to update local residents and businesses.

Wastewater Treatment Plant

Construction on the Wastewater Treatment Plant commenced in August 2015 and is continuing to programme. Operations commenced at the new treatment plant at the end of December 2016, providing full treatment of all wastewater from houses and businesses in Carrigaline, Crosshaven and Shanbally. 

Passage West / Monkstown Network Contract and Carrigaline / Ringaskiddy Network Contracts

Irish Water has contracted Ward & Burke Construction Ltd. for the repairs and upgrades to  the sewerage network in the towns of Carrigaline, Glenbrook, Monkstown, Passage West  and Ringaskiddy. Emma Murphy, Community Liaison Engineer with Ward & Burke, can be contacted by email on corklh@wardandburke.com. Construction commenced in early March 2017 and is ongoing.

Cobh Network Contract and Estuary Crossing Contract

Site Investigation to support the detailed design of the Cobh network is continuing.

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