Cray Reservoir is a storage reservoir located in the Brecon Beacons National Park for the water supply to the city of Swansea in South Wales and was built between 1898 and 1908 by Swansea Corporation.
The reservoir is one of several established in what is now the Brecon Beacons National Park, an area of Old Red Sandstone peaks with relatively high rainfall. The 28-metre high dam is within a wide glaciated valley and is estimated to impound some 1,007,000,000 gallons of water. The structure is believed to have been made from over 10 million bricks.
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Address: Powys, United Kingdom
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