Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Frankley Reservoir is a semi-circular reservoir for drinking water in Birmingham, England. 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 900 million litres (200 million gallons) of water received from the Elan Valley Reservoirs, 73 mi (117 km) away, in Wales, which arrives via the Elan aqueduct, by the power of gravity alone, dropping 171 feet (52 m) - an average gradient of 1 in 2,300.