Irish Water has identified the Parteen Basin on the River Shannon as it preferred option for a new supply of drinking water for Dublin and the Midlands.
It's proposing the construction of a 165 kilometre pipeline from a reservoir on the Tipperary side, to the south of Lough Derg.
The utility says this option will have the least environmental impact of the four it examined and is close to the Ardnacrusha hydro-electric power station.
Gerry Grant from Irish Water says the detailed design process will start after a period of public consultation:
