Page last updated at 13:35 GMT, Monday, 8 March 2010

Former Cornwall china clay quarry to become reservoir

Work has started on a £1.2m project in Cornwall to convert a former china clay quarry, which has since become a lake, into a water reservoir.

Stannon Lake, near Camelford on Bodmin Moor, is 60m (200ft) deep and holds 8bn litres (1.8bn gallons) of water.

It was bought by South West Water (SWW) from Imerys in 2008.

Two shore-based pumps are being built and will transfer up to 6m litres (1.3m gallons) of water a day into the raw water network, SWW said.

'Safeguard supplies'

The area had been an active clay pit until 2002.

The transferred water will then be treated at either De Lank Water Treatment Works near St Breward or Lowermoor Water Treatment Works near Camelford, SWW said.

Project manager Nol Vincent said: "Our aim is to safeguard water supplies for our customers, whatever climate change throws at us.

"The development of Stannon Lake gives us significant extra reserves, without the cost and disruption involved in building a new reservoir - a process which can take 20 years."

Stannon will become the second largest reservoir in Cornwall, behind the county's Colliford reservoir, which holds 28.5bn litres (6.2bn gallons).

It is expected to be fully operational at the end of the summer.

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