Llyn Brianne Dam
west of Llanwrtyd Wells, Powys
associated engineer
Binnie & Partners
date 1972
era Modern |
category Dam/Reservoir |
reference SN790484
ICE reference number HEW 552
photo PHEW
Highest dam in Britain at 300ft. 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 30ft wide and 900ft long. It stores the water supply for Swansea, Neath and Port Talbot.
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.
Location
Llyn Brianne Dam
Photos taken in this area
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