The High Court has thrown out three legal challenges to plans for a new €320m runway at Dublin Airport.
Mr Justice Max Barrett dismissed the actions over the proposed development of a 3,110-metre runway on 261 hectares in townlands north and north-west of the airport terminal building.
The runway has been deemed vital by parties including the Dublin Airport Authority (DAA) to proposals to turn the airport into an international hub.
While the judge accepted there is a constitutional right to an environment, as was argued by Friends of the Irish Environment in its challenge, he held that it did not arise in circumstances where the group was not entitled to participate in the decision extending permission for the runway.
That case was also brought against Fingal County Council and the State, with the DAA and Ryanair as notice parties. They had all rejected the claims.
The judge also dismissed the claim by St Margaret's Concerned Residents Group against the DAA.
The residents claimed certain pre-construction works carried out last December by the DAA amounted to unauthorised development.
The judge further dismissed the action brought by 22 residents - most with addresses at Kilreesk Lane, St Margaret's, Co Dublin, who alleged the development was illegal.
The cases have been adjourned for a week to let the parties consider the decisions.