Langsett Reservoir
Bradfield, United Kingdom
Langsett Reservoir is in the Metropolitan Borough of Barnsley, South Yorkshire, England, near the villages of Langsett and Upper Midhope, on the edge of the Peak District National Park. The reservoir was constructed between 1898 and 1904, and is now managed by Yorkshire Water. Fed by the Little Don or Porter River, it is around a mile long, and supplies water for Barnsley and Sheffield via the Langsett Treatment Works.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).