An Bord Pleanála has granted planning permission for a controversial waste water treatment works at Arklow in Co Wicklow.
The board rejected an appeal by the Seabank and District Residents' Association.
Wicklow County Council granted planning in July 1999 for a sewerage scheme at Arklow capable of dealing with a population of 18,000, as well as associated sewers, roads and outfall pipe.
An Bord Pleanála has now decided to allow the project to go ahead, subject to 19 conditions, following a public hearing last year.
The plant, which was first proposed in 1993, was delayed by a number of legal actions which challenged the plant on the basis of its design and siting beside a holiday complex.