Dublin Castle Ireland (1800–1922). After the signing of the Anglo-Irish Treaty in December 1921, the complex was ceremonially handed over to the newly formed Provisional Government led by Michael Collins. It now hosts the inauguration of each President of Ireland, and various State receptions. The castle was built by the dark pool ("Dubh Linn") which gave Dublin its name. This pool lies on the lower course of the River Poddle before its confluence with the River Liffey; when the castle was built, the Liffey was much wider, and the castle was effectively defended by both rivers. The Poddle today runs under the
River Shannon to Dublin pipeline River Shannon to Dublin pipeline Dublin City Council published a plan in 2011 to supply up to 350 million litres of water a day from Lough Derg to Dublin city and region. In January 2014, Irish Water took over management of the project which is currently in the Planning Stage. In 2016 it was proposed that over two million people will benefit from the pipeline suppling not only Dublin but also an area including Arklow, Athlone, Athy, Carlow, Drogheda, Mullingar, Navan, Portaloise and Tullamore. In 2018 Irish Water announced plans to seek planning permission for the project. In November 2016