Plans to develop a controversial sewage treatment plant in Dublin have been delayed after Irish Water failed to include key information in its planning application.
An Bord Pleanala has ordered a further five-week public consultation period after being informed by the utility that technical information surrounding the impact the plant would have on the environment was not submitted as required.
The Environmental Impact Assessment (EIA) report forms part of an application to develop a large sewage treatment plant in Clonshaugh, north Dublin.
However, supporting evidence on the ground and marine investigations, as well as drawings of road and rail lines in the area chosen, were never submitted.
This prompted local Fianna Fail TD Darragh O'Brien to raise concerns about the application.
"If you can't even get a planning application right then it calls into question the approach that is being taken on this," Mr O'Brien said.
Irish Water wants to build a major wastewater treatment plant to serve 500,000 people in the Greater Dublin Area.
It also proposes building a biosolids facility, where sludge remaining from the treatment process would be stored.
An overflow pipe leading into the Irish Sea would also carry treated wastewater.
Information missing from the application included drawings and data relating to the meeting points of existing underground gas and power lines with the proposed new water treatment infrastructure.
Irish Water said data and conclusions within the EIA report, which will go back out for public consultation on Thursday, would not be affected as a result.
It also said it would not affect the delivery of the plant within proposed timeframes.
"The additional five-week consultation will not add significantly to the overall project delivery programme and sufficient allocation has been made," a spokesperson for Irish Water said.
"The new regional wastewater treatment facility is being proposed in order to protect public health, safeguard the environment and facilitate the social and economic growth of the Greater Dublin Area."
The plans for the plant on a 32-hectare site have faced objections from locals, who cite tourism and environmental concerns as their reasons for objecting.
A total of 142 "valid objections" had been submitted to An Bord Pleanala when the original consultation period closed on August 17.