Damflask Reservoir is an English water feature situated at grid reference five miles (eight kilometres) west of the centre of Sheffield

Sheffield

Sheffield is a city and metropolitan borough of South Yorkshire, England. Its name derives from the River Sheaf, which runs through the city. Historically a part of the West Riding of Yorkshire, and with some of its southern suburbs annexed from Derbyshire, the city has grown from its largely...

 in the Loxley

Loxley, South Yorkshire

Loxley is a village and a suburb of the city of Sheffield. It is a long linear community which stretches by the side of the River Loxley and along the B6077 for almost four kilometres. Loxley extends from its borders with the suburbs of Malin Bridge and Wisewood westward to the hamlet of Stacey...

 valley close to the village of Low Bradfield

Low Bradfield

Low Bradfield is a village within the in South Yorkshire, England. It is situated within the boundary of the city of Sheffield in the upper part of the Loxley Valley, 6¼ miles west-northwest of the city centre and just inside the northeast boundary of the Peak District National Park...

 and within the city's boundaries. The reservoir has a capacity of 4,250.9 million litres (1,123.1 million gallons) and has a surface area of 47 hectares (116 acres) with a maximum depth of 27 metres (88 ft).