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Scammonden Reservoir

From Wikipedia, the free encyclopedia

Scammonden Reservoir
Image of a lake in wintertime with a motorway across the dam head
Scammonden Reservoir and the M62
LocationWest Yorkshire
Coordinates53°38′30″N 1°55′26″W / 53.64167°N 1.92389°W / 53.64167; -1.92389
Typereservoir
Basin countriesUnited Kingdom
Surface area42 hectares (0.16 sq mi)
Surface elevation252 metres (827 ft)
Scammonden Dam under construction in 1970
Scammonden Dam under construction in 1970

Scammonden Reservoir is a water reservoir in West Yorkshire, England. The area of the water surface when the reservoir is full is 42 hectares (0.16 sq mi). The level of the bellmouth overflow above sea level is 252 metres (827 ft). The reservoir holds 78,000,000 litres (17,000,000 imp gal; 21,000,000 US gal). Its length is 1.4 kilometres (0.9 mi).

History

Scammonden Dam is part of the M62 motorway between junctions 22 and 23, the only such structure in Britain.[1] Its construction by the Ministry of Transport and Huddersfield Corporation Waterworks required the passing of the Huddersfield Corporation Act 1965. The motorway dam spans the Deanhead Valley in the Pennines between Huddersfield and Rochdale and the main contractor for the project was Sir Alfred McAlpine & Sons.[2] Deanhead village was submerged and many buildings demolished to make way for the reservoir but the church remains and its vicarage is used by the sailing club.[3] Both the church and adjacent school were at risk of slipping down the hillside into the dam and were not used after 1971 when the motorway opened. The church was renovated in 2002[4] and the old schoolhouse has been converted into a private dwelling.[5]

Surveying began in November 1961 and the route of the carriageway was determined in mid 1963. Excavation in the Deanhead Valley commenced the following year and for the dam in 1966. This required the removal of 713,000 cubic metres (25,200,000 cu ft) of peat bog to reach the solid rock base nearly 13 metres (43 ft) below ground level. Material excavated elsewhere on the line of the motorway, clay from cuttings between Lofthouse and Gildersome, and 3.4 million cubic metres from the Deanhead excavations was used to build the dam's embankment which is 625 metres (2,051 ft) in length and 63.1 metres (207 ft) above the original valley floor. The 3.6 million cubic metre embankment is 435 metres (1,427 ft) wide at its base and 55 metres (180 ft) at road level.[3]

Scammonden Water is 51.8 metres (170 ft) at its deepest point and water is drawn-off through a 2.5 kilometres (1.6 mi) tunnel driven southwards to supply Huddersfield. The overflow bellmouth, next to the valve shaft superstructure, discharges water to the valley below via a tunnel in the valley on the reservoir's eastern side. The reservoir started to fill in July 1969 and the area was landscaped and parking and other facilities were provided.[3]

The motorway, which was dependent on the completion of the dam, was opened to traffic on 20 December 1970 and officially opened by HM Queen Elizabeth II who unveiled a plaque near the valve tower of Scammonden Water on 14 October 1971.[3]

Leisure activities

The reservoir is home to Scammonden Water Sailing Club or SWSC. The sailing club has the exclusive rights to the water, which means that the activities on the water are either dingy cruising or racing.[6] Other activities occasionally take place usually under the auspices of the scouts.

Huddersfield Scout Sailing is a Royal Yachting Association Training Centre run by volunteers for scouts and guides. There is also a scouting activity centre located at the water's edge which also holds the boat workshop for scout sailing.

Scammonden Steps

Close to the reservoir, at the other side of the motorway and dam wall, Scammonden steps comprises five flights of steps up the hillside from the valley below. Totaling 458 steps, the cumulative step count when ascending each of the five flights is 95, 200, 287, 363 then 458.

References

  1. ^ "Scammonden Dam". Engineering Timelines. Archived from the original on 7 March 2012. Retrieved 22 July 2016.
  2. ^ Gray, p. 79
  3. ^ a b c d Scammonden Dam, Engineering Timelines, archived from the original on 7 March 2012, retrieved 26 November 2011
  4. ^ "St Bartholomews Deanhead". A church near you. Church of England. Archived from the original on 19 August 2016. Retrieved 22 July 2016.
  5. ^ "Memories of old village school". Halifax Courier. 24 September 2013. Archived from the original on 22 August 2016. Retrieved 22 July 2016.
  6. ^ "Scammonden Water Sailing Club: Constitution, Rules and Bylaws" (PDF). Scammonden Water Sailing Club. 2004. Archived (PDF) from the original on 22 December 2015. Retrieved 21 December 2015.

Sources

  • Gray, Tony (1987). The Road to Success: Alfred McAlpine 1935–1985. Rainbird Publishing.

External links

This page was last edited on 29 July 2020, at 11:07
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