UPDATE: Essential work has officially begun to protect the historic Cyfarthfa Castle in Merthyr Tydfil. On November 3, 2023, crews commenced the installation of a new underground drainage system aimed at halting the castle’s significant deterioration, which has raised serious safety concerns for the iconic structure.
The Welsh Government and Merthyr Tydfil County Borough Council are each contributing £2.25 million to this urgent project. The funding will address critical issues affecting the oldest parts of Cyfarthfa Castle and protect the historic Pont-y-Cafnau bridge, renowned as the oldest iron railway bridge in the world.
Recent reports have confirmed that Cyfarthfa Castle is in a dire state, with parts of the structure fast approaching dereliction. A council report from February 2025 indicated that the castle’s condition had significantly worsened, leading to collapsed ceilings and restricted access to certain rooms. The need for immediate action is clear, as ongoing water management issues continue to threaten the building’s integrity.
The newly designed drainage strategy will not only install a below-ground drainage network but also create permanent solutions to existing drainage problems across Cyfarthfa Park. Inadequate drainage has caused rainwater to flood into the basement of the castle, while the parkland has suffered from tree losses due to waterlogged ground.
The council has acknowledged that the current drainage system, which is outdated and poorly maintained, does not meet modern stormwater flow rates. The new system will facilitate controlled rainwater discharge and significantly reduce flooding risks.
During this crucial work, park visitors may experience temporary closures of footpaths and areas for public safety. The council assures the community that efforts will be made to minimize disruptions to residents and visitors alike.
As part of the long-term plan, new drainage channels will be excavated around the castle perimeter, connecting to below-ground attenuation tanks designed to handle surface water runoff effectively. The project aims for completion by spring 2026, ensuring that Cyfarthfa Castle can continue to serve as a cultural and historical gem for future generations.
This project represents a pivotal moment in preserving the rich heritage of Merthyr Tydfil. With the castle housing a museum and art galleries, the urgency of this restoration work underscores the importance of maintaining such a significant landmark.
Stay tuned for further updates as this vital project progresses.
