Frankley Reservoir is a semi-circular reservoir for drinking water in Birmingham, England, operated by Severn Trent Water. Its construction was authorised by the Birmingham Corporation Water Act of 1892. It was built by Birmingham Corporation Water Department to designs by Abram Kellett of Ealing in 1904. It contains of water received from the Elan Valley Reservoirs, away, in Wales, which arrives via the Elan aqueduct, by the power of gravity alone, dropping – an average gradient of 1 in 2,300. Before 1987 it was leaking per second. In that year ground-penetrating radar was used successfully to isolate the leaks. See also List of reservoirs and dams in the United Kingdom Frankley Water Treatment Works References External links History Drinking water reservoirs in England Reservoirs in Birmingham, West Midlands