The Claerwen Valley was dammed in 1952 as part of a scheme to provide water for Birmingham. The dam is almost twice the size as the others in the Elan Valley, and the reservoir itself snakes 5 miles up the valley.
- Taken: on 10 February 2008
- Nearest place: Elan Village
- Places to stay around Rhayader
- OnlineWales Internet Ltd © 2008