Grafham Water

Grafham Water is an 806.3-hectare biological Site of Special Scientific Interest north of Perry, Huntingdonshire. It was designated an SSSI in 1986. It is a reservoir with a circumference of about 16 km, is 21 m deep at maximum, and is the eighth largest reservoir in England by volume and the third largest by area at 6.27 km2. An area of 114 ha at the western end is a nature reserve managed by the Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire.The lake was created by building an earth and concrete dam, constructed by W. & C. French in 1965, and water is extracted and processed at an adjacent Anglian Water treatment plant before being piped away as drinking water. It was shown from the air, before it opened, in 'Look at Life' ' 1965 episode, 'Will Taps Run Dry ?', narrated by Tim Turner.