The final section of the Corrib gas pipeline in Co Mayo has been given the go-ahead.
An Bord Pleanala has given permission for a revised route after three applications by Shell E&P Ireland over the last ten years.
The controversial pipeline has caused outrage among local residents who have health and safety fears as well as environmental concerns.
The revised route, which includes an undersea tunnel, will link the pipeline at Glenglad to the gas terminal at Bellanaboy.
The project has been embroiled in controversy for around 15 years.
Locals have been opposed to the pipeline since the gas field was first discovered off the Co. Mayo coast in 1996.
There has been numerous protests down through the years - locals did not want the project to go ahead on health and safety grounds and they also had environmental concerns.