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Llyn Brianne Dam
west of Llanwrtyd Wells, Powys, Wales, UK
Llyn Brianne Dam
associated engineer
Binnie & Partners
date  1972
era  Modern  |  category  Dam/Reservoir  |  reference  SN790484
ICE reference number  HEW 552
photo  courtesy PHEW, ICE
Llyn Brianne is the tallest dam in Britain at 91m. It regulates the River Tywi and is constructed of rock filling with a boulder clay core. The spillway can be seen in the picture.
The crest of the dam is 9.1m wide and 275m long. Llyn Brianne stores the water supply for Swansea, Neath and Port Talbot in Wales.
A road runs the six mile length of the reservoir and visitors can drive down to the bottom of the spillway to view the water jet at the discharge point at the foot of the dam.
Contractor: George Wimpey & Co. Ltd.
reference sources   CEH W&W
Location

Llyn Brianne Dam

Photos taken in this area
source : Panoramio
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