| Cwm Dyli hydro-electric power station | |
|---|---|
 | |
  Location of Cwm Dyli hydro-electric power station in Wales | |
| Location | Cwm Dyli, Wales |
| Coordinates | 53°03′57″N 4°00′41″W / 53.0659°N 4.0115°W |
| Opening date | 1905 |
| Reservoir | |
| Creates | Llyn Llydaw |
| Power Station | |
| Installed capacity | 9.8 MW |
Cwm Dyli is the location of a hydro-electric power station on the southern flank of the Snowdon range in North Wales. At the time it was built, it was the largest hydro-electric power station in the United Kingdom. It is Britain's oldest power station, and is believed to be one of the oldest Grid-connected hydro-electric stations in the world.