Carsington Water is a reservoir operated by Severn Trent Water located between Wirksworth and Kniveton in Derbyshire.
The reservoir takes water from the River Derwent at Ambergate during winter months, pumping up to the reservoir by 6.5 mile long tunnels and aqueduct. Water is released back into the river during summer months for water abstraction and treatment further downstream. It is England's ninth largest reservoir with a capacity of 35,412 litres.
Planning for the reservoir started in the 1960s with actual construction starting in 1979. In 1984 there was a partial collapse of the dam prior to its filling. The dam was subsequently completely removed before construction of a new dam commenced in 1989. The finished reservoir was opened by Queen Elizabeth II in 1992.
The reservoir is a major centre for leisure activities including walking, cycling, fly fishing, birdwatching, sailing, canoeing, and windsurfing. The land surrounding the reservoir, in particular the facilities around the visitor centre, has played host to events including a music festival, the Festival of the Peak.