I am not specifically aware of the document the Deputy refers to, however I understand there are often a wide range of costs associated with re-opening any disused railway line.
As the Deputy is aware, I do believe our rail network requires a broad strategic review to better understand its role and assess its future potential. A review is underway to consider whether opportunities exist to better utilise currently underused lines, or closed lines such as the Rosslare to Waterford line.
The Strategic Rail Review is being led by my Department, in co-operation with the Department for Infrastructure (Northern Ireland). It will inform the development of inter-urban and inter-regional rail on the Island of Ireland over the coming decades.
This will be one of the most significant reviews of the rail network on the island in many years. A public consultation is underway, open until 21st January. I would encourage all interested parties to participate. For the Deputy's information, I expect a final report from the Review to be available by Q4 2022.