Dog Walks Wales Llyn Brianne Reservoir 06 - Dog Friendly Wales | Dog Friendly Hotel

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South Wales Dog Friendly Walks - Llyn Brianne Reservoir

Llyn Brianne: Hydroelectric Power


The spillway of the dam is a notable tourist attraction when the reservoir is spilling.

The dam is the UK's tallest, standing at a height of 300 ft (91 m), and is the world's largest clay core dam.

In 1996 the reservoir spillway was increased by 1 metre in height and a hydro electric generating station was added at the base of the dam. When all three turbines are working, it generates 4.3 megawatts of electricity.


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