Prior to the recommendation being put forward and as part of the previous stakeholder consultation period, the following were also taken into consideration:
I. Fingal/Kildare Groundwater
This water supply option looked at the potential for the development of strategic groundwater supply sources in the Fingal and Kildare areas.
J. Liffey/Barrow.
Approximately 50% of the Dublin Region's water supply comes from Poulaphuca Lake on the Upper Liffey via Ballymore Eustace Water Treatment Plant. A continuous abstraction quantity of 318Ml/d from Poulaphuca for treatment in Ballymore Eustace has been licensed as the maximum sustainable abstraction level for this plant.
The Liffey-Barrow "conjunctive use" option envisaged abstractions of water from the Barrow when sustainable quantities may be available and combining these abstractions with variable abstractions from Poulaphuca with a view to increasing the overall supply to Ballymore Eustace Water Treatment Plant over and above what is sustainably available from Poulaphuca on its own.