Cwm Dyli

Cwm Dyli hydro-electric power station
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.