A water tower in west Dublin, which was completed last year at a cost of almost €3m, has never been used because it is leaking.
The tower won a civil engineering award in 2008 and is designed to service some of the high profile businesses in the area such as IBM. But all attempts to fix it so far have failed.
Fingal County Council say efforts to repair the tower are ongoing and they expect the problem to be resolved by the end of this year.
The contractors, Coffee Construction, say they are working with the council to deal with the leak.
It is not the only infrastructure in the Fingal area lying idle.
A treatment plant at the landfill in Balleally that cost €500,000 to build and opened in 2005 was decommissioned last year because it could not reach one of the water standards set out in its licence.
Fingal County Council say the treatment facility at Ballealy Landfill should be back up and running by the end of 2011.
The Council says when it can use the new treatment facility in Portrane it will help meet these licence conditions.
