Oireachtas Joint and Select Committees

Wednesday, 28 May 2025

Committee on Infrastructure and National Development Plan Delivery

Uisce Éireann: Future Work Programme

2:00 am

Mr. Seán Laffey:

I mentioned the water supply project from the Shannon. It is a climate resilience project. If we can take water from the Shannon, ultimately, it will be 300 Ml, which is about 4% of the average flow in the Shannon. To put that in context, during a flood event, one might get 1,400 cu. m per second going down over the dam so we are looking to take three. We will be borrowing that three from the ESB. The ESB can push 100 cu. m per second through the turbines in Ardnacrusha so when we are abstracting, it will be pushing 97. That is going to be the deal. We will take those 300 Ml across the country and supply various communities along the way. A total of 200 Ml will be for the greater Dublin area while 100 Ml will be for places like Mullingar, Tullamore, etc. This will give us a truly climate-resilient water treatment system - a spine running across the country. Regarding the other significant advantage, at the moment, Dublin is like a black hole for water. We push water into Dublin from Srowland in Athy, the wellfields in Monasterevin, Staleen and Cavan Hill. Once that supply lands from the Shannon, we can turn those plants around so Staleen and Cavan Hill will guarantee a climate-proof supply for Drogheda and Dundalk. Vartry will push it down to places like Dunlavin, etc. Srowland might be used to supply Carlow or back up towards Portlaoise.

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