Haweswater Reservoir

General data
- Name: Haweswater Reservoir
- Water system: River Eden (Cumbria)
- Water type: Artificial lake
- Progression: Haweswater Beck -> River Lowther -> River Eamont -> River Eden (Cumbria) -> Solway Firth -> Irish Sea -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: Europe
- Countries: England (UK)
Description
Haweswater is a reservoir in the valley of Mardale, Cumbria in the Lake District, England. Work to raise the height of the original natural lake was started in 1929. It was controversially dammed after the UK Parliament passed a local act of Parliament, the Manchester Corporation Act 1919 (9 & 10 Geo. 5. c. cxix), giving Manchester Corporation permission to build the reservoir to supply drinking water to the city. The decision caused a public outcry because the farming villages of Measand and Mardale Green would be flooded and the valley altered forever. The reservoir is now owned by United Utilities. It supplies about 25% of the North West's water supply.