Dun Laoghaire-Rathdown Council is preparing to go to the High Court to seek to have the injunction halting construction on the M50 motorway at Carrickmines in south Dublin lifted.
Earlier today, the Minister for the Environment cleared the way for work to resume on the motorway, despite appeals from campaigners seeking to preserve the medieval castle site.
Martin Cullen said the Council had demonstrated a 'systematic approach' to what he described as 'the archaeological resolution' of the site.
The Minister noted that as many as 130 archaeologists have been employed by the Council at a cost of €6m and while he had received six objections to the Council's proposal, 17 had supported it.
The plan which was put forward by the Council is a compromise agreed with the Transport Minister in which parts of the ruined Carrickmines Castle will be preserved but others parts - such as the perimeter wall - will be removed.
Campaigners had argued that by moving the road slightly, the entire site could be preserved.
