The Railway Safety Commission will today review the final details of the reconstructed viaduct at Malahide, Co Dublin.
Iarnród Éireann has confirmed it is to reopen the viaduct and resume normal commuter services on Monday. The works have already been examined by independent structural engineers and the commission.
Northern commuter and Belfast Enterprise services have been disrupted for almost three months since a section of the viaduct collapsed on August 21st.
In a statement earlier this week, Iarnród Éireann said major physical works had been completed and that test trains would operate on the line until Sunday.
Iarnród Éireann has spent more than €4 million rebuilding a weir which had collapsed and reinstituting a pillar on which the viaduct stands. Reinforcement to other pillars was also carried out and the works have also included replacement of the bridge and track.
The collapse was caused by erosion of the weir at sea-bed level which undermined the support of one pier, Iarnród Éireann said. The investigation into the cause of the incident was continuing and would be concluded early next year.