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Thornton Steward Reservoir

From Wikipedia, the free encyclopedia

Thornton Steward Reservoir
A lake with tree on the far bank
Thornton Steward Reservoir
LocationNorth Yorkshire, England
Coordinates54°17′17″N 1°43′22″W / 54.28806°N 1.72278°W / 54.28806; -1.72278
Basin countriesUnited Kingdom
Surface area33 acres (13 ha)
Shore length10.9 miles (1.4 km)
Surface elevation495 feet (151 m)
1 Shore length is not a well-defined measure.

Thornton Steward Reservoir is a reservoir north of the village of Thornton Steward in North Yorkshire, England.[1] It is owned by Yorkshire Water, and supplies drinking water to Swaledale, Wensleydale, Northallerton, and Thirsk.[1][2]

Thornton Steward Water Treatment Works (WTW) opened in 1977, and was refurbished in the 1990s. It was upgraded in 2003,[1] and its mains connections improved in 2007, allowing Yorkshire Water to close older works in Langthwaite and at Cod Beck Reservoir above Osmotherley.[3][4] The removal of the Langthwaite WTW, which was fed with groundwater from an adit, means that Thornton Steward now meets the needs of the Swaledale settlements formerly provided by Langthwaite.[2]

The majority of the water from Thornton Steward is piped to a pumping station north of Ainderby Steeple and from there to Bullamore Reservoir (a system of four covered concrete cisterns on the hillside east of Northallerton). That in turn supplies Northallerton and Thirsk.[5]

The reservoir is fed from water pumped from the River Ure, which is extracted at Kilgram Bridge 1 mile (2 km) to the south.[6] It is also supplied with water from Leighton Reservoir.[3]

The reservoir is host to the Thornton Steward Sailing Club[7] and is used for fly fishing.[8]


  1. ^ a b c Farmery, Ian; Hayton, Mark (2008). "Thornton Steward WTW" (PDF). Water Treatment and Supply. Water Projects Ltd. p. 177. Retrieved 8 March 2017.
  2. ^ a b Martin Parvin (2007). "Thornton Steward WTW" (PDF). Water Treatment and Supply. Water Projects Ltd. p. 177. Retrieved 9 September 2019.
  3. ^ a b "Work starts on £1m water main project". Darlington and Stockton Times. 11 November 2007. Retrieved 8 March 2017.
  4. ^ "£6.5m scheme to improve water treatment in county". Darlington and Stockton Times. 16 August 2006. Retrieved 8 March 2017.
  5. ^ Paul Stockhill (2008). "Thirsk/Northallerton Supply Strategy - improving supply to 13,000 properties over 700 sq kms" (pdf). Water Treatment & Supply. Water Projects Ltd. p. 214.
  6. ^ "Delivering our commitments - Annual Performance Report 2018/2019" (PDF). Yorkshire Water. July 2019. p. 309. Thornton Steward reservoir becomes a new source, even though it does not have its own abstraction licence, because it meets the >15 days storage rule in RAG 4 Appendix 2. This reservoir is a pumped storage reservoir, being supplied from the River Ure at Kilgram Bridge.
  7. ^ Gleeson, Janet (7 May 2013). "Thornton Steward Sailing Club floats open day". Darlington and Stockton Times. Retrieved 8 March 2017.
  8. ^ "Thornton Steward Reservoir". Felling Fly Fishing Club. Retrieved 8 March 2017.

This page was last edited on 29 July 2020, at 11:41
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