Plans Unveiled to Decommission 122-Year-Old Perthcelyn Reservoir

Authorities in Wales are moving forward with plans to decommission the disused **Perthcelyn Reservoir** located in the **Cynon Valley**. An application has been submitted to the **Rhondda Cynon Taf Council** for the infilling of the reservoir, which has not been operational for an extended period.

The proposal, put forth by **Perthcelyn Limited**, includes installing drainage infrastructure within the reservoir basin. This initiative aims to address ongoing water retention issues, ensure effective land management, and enhance safety for the surrounding area. The total site covers approximately **6.916 hectares** (17.09 acres), with the reservoir encompassing **1.53 hectares** and its embankment spanning around **2.3 hectares** (6.5 acres).

Background and Current Status

Constructed in **1903**, the Perthcelyn Reservoir originally held a capacity of **143,500 cubic metres**. Despite its historical significance, it has remained unused and unmanaged, prompting the current decommissioning efforts. The reservoir continues to fall under the **Reservoirs Act 1975**, which mandates certain safety and integrity measures for such structures.

The design statement highlights that the reservoir features steep brick-lined internal banks, with a valve tower situated at its northeastern corner. The area is surrounded by scrubland and mature trees, while previous infrastructure related to the reservoir has been removed.

Environmental Considerations and Community Impact

The project aims to provide a balanced and environmentally responsible solution to longstanding drainage and safety challenges at the site. The statement from Perthcelyn Limited asserts, “The proposal represents a proportionate and environmentally responsible approach to resolving longstanding drainage and safety issues at the site.”

By introducing formal drainage systems, the initiative seeks to reduce water retention, improve site stability, and promote long-term environmental conditions. Furthermore, the proposal avoids the introduction of new structures, thereby preserving the visual and ecological character of the surrounding rural landscape.

The scheme also aims to enhance public safety through better water management and supports natural regeneration by facilitating passive habitat restoration. As the project progresses, it could serve as a model for similar initiatives in other regions facing comparable issues related to disused reservoirs.