Cwm Dyli Marks 120 Years of Hydropower Operations in the UK

Cwm Dyli, a 10MW hydropower station owned by RWE, celebrates its 120th anniversary in August 2026. The station utilizes water from Llyn Llydaw and operates with a gross head of 342m. A recent refurbishment of pipeline supports, completed over 2022 and 2023, addressed engineering challenges in difficult terrain, demonstrating the resilience of the infrastructure.

The plant's operational life is further enhanced by modern digital systems, allowing for remote monitoring and control. Cwm Dyli's capacity to store water and provide dispatchable power supports demand peaks, making it essential in RWE's flexible generation portfolio. This operational flexibility is increasingly critical as the UK grid integrates more intermittent renewable sources.