The collapse of a viaduct in the Republic of Ireland led to a repair bill of more than 100,000 for railway bridges in Northern Ireland, it has emerged.
A total of 157 bridges were examined in the wake of the damage near Dublin, leading to scour protection and concrete work being carried out.
When the Malahide viaduct collapsed last August it led to the three-month closure of a large section of the Belfast to Dublin line.
Regional Development Minister Conor Murphy revealed the figures to SDLP MLA Tommy Burns in the Assembly.
A report on the collapse of the Malahide viaduct has found there was a failure as Republic of Ireland staff did not know the type of structure they were dealing with.
An independent report found that over the years rail staff became unaware that the piers were resting on rocks and not pile-driven into the seabed.
The study was commissioned by southern rail operator Iarnrod Eireann after the viaduct’s collapse.
A major accident was narrowly avoided on 21 August last year following the collapse of a section of the viaduct.
The rail line was closed for almost three months, reopening last November after repairs estimated at more than £3.5M were carried out.