Ladybower Reservoir

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Ladybower Reservoir
Aerial view of Ladybower reservoir, with Bamford Edge in the distance - 51844490452 13c8b224ef.jpg
An aerial view of Ladybower Reservoir with Bamford Edge in the distance
Derbyshire UK relief location map.jpg
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Ladybower Reservoir
England relief location map.jpg
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Ladybower Reservoir
Location Upper Derwent Valley, Derbyshire
Coordinates 53°23′N1°43′W / 53.383°N 1.717°W / 53.383; -1.717
Lake type reservoir
Primary inflows River Ashop, River Derwent
Primary outflows River Derwent
Catchment area 6,364 acres (2,575 ha)
Basin  countriesUnited Kingdom
Max. length2.5 mi (4.0 km)
Max. width1,950 ft (590 m)
Surface area 210 ha (520 acres) [1]
Average depth95 ft (29 m)
Max. depth135 ft (41 m)
Water volume 27,800,000 m3 (6.1×109 imp gal) [1]
Shore length113 mi (21 km)
Surface elevation668 ft (204 m)
References [2]
1 Shore length is not a well-defined measure.

Ladybower Reservoir is a large Y-shaped, artificial reservoir, the lowest of three in the Upper Derwent Valley in Derbyshire, England. The River Ashop flows into the reservoir from the west; the River Derwent flows south, initially through Howden Reservoir, then Derwent Reservoir, and finally through Ladybower Reservoir. The reservoir is owned by the water company Severn Trent. [3]

Contents

The area is now a tourist attraction, with the Fairholmes visitors' centre located at the northern tip of Ladybower. The east arm of the reservoir, fed by the Ladybower Brook, is overlooked by Hordron Edge stone circle. [4]

Design and construction

The Ashopton Viaduct (left) carries the Snake Pass A57 road and the Ladybower Viaduct carries the A6013 to Bamford over the reservoir. Ladybower Reservoir viaducts - April 2021.jpg
The Ashopton Viaduct (left) carries the Snake Pass A57 road and the Ladybower Viaduct carries the A6013 to Bamford over the reservoir.

Ladybower was built between 1935 and 1943 by the Derwent Valley Water Board to supplement the other two reservoirs in supplying the water needs of the East Midlands. It took a further two years to fill, which was done by 1945. The dam differs from the Howden Reservoir and Derwent Reservoir in that it is a clay-cored earth embankment and not a solid masonry dam. Below the dam is a cut-off trench 180 ft (55 m) deep and 6 ft (1.8 m) wide filled with concrete, stretching 500 ft (150 m) into the hills each side, to stop water leaking around the dam. The dam wall was built by Richard Baillie and Sons, a Scottish company. The two viaducts, Ashopton and Ladybower, needed to carry the trunk roads over the reservoir, were built by the London firm of Holloways, using a steel frame clad in concrete. The project was delayed when the Second World War broke out in 1939, making labour and raw materials scarce, but construction was continued due to the strategic importance of maintaining supplies. King George VI, accompanied by his wife, Queen Elizabeth, formally opened the reservoir on 25 September 1945.

During the 1990s, the wall was raised and strengthened to reduce the risk of over-topping in a major flood. The original dam wall contains 100,000 tons of concrete, over one million tons of earth, and 100,000 tons of clay for the core. The upstream face is stone-faced. Materials were brought to the site on the Derwent Valley Water Board's own branch line and their sidings off the mainline in the Hope Valley.

The reservoir Ladybower Reservoir.jpg
The reservoir

The dam's design is unusual [lower-alpha 1] in having two totally enclosed bellmouth spillway overflows (locally named the "plugholes") at the side of the wall. These are stone and of 78 ft (24 m) diameter with a drop of 66 ft (20 m). The plugholes regulate water levels in the reservoir by draining away excess water when they overflow. The water is then carried to the River Derwent through tunnels. [3] The overflows originally had walkways around them, [5] but they were dismantled many years ago. The plugholes typically overflow in winter months if there has been wet or snowy weather in the nearby hills. According to Severn Trent, the reservoir’s operating company, the overflowing plug holes attract many visitors each year. [6]

Water usage

The water is used for river control and to compensate for the water retained by all three dams, along with supply into the drinking water system and hydroelectricity generation. [7] Drinking water must be pumped to treatment works rather than using gravity flow as in the other two reservoirs, increasing costs. [8] The drinking water is treated at Bamford water treatment works by Severn Trent Water. Treated water flows south down the 28 mi (45 km) long Derwent Valley Aqueduct to a covered service reservoir at Ambergate to supply clean water to the cities of Nottingham, Derby and Leicester in the East Midlands of England. The aqueduct passes through the park of Chatsworth House. The path of the aqueduct is marked by a series of valve houses built of stone and domed steel access chambers. A tunnel carries some of the water from the Derwent Valley eastwards through the hill and into the lower of the two Rivelin Dams to supply Sheffield.

Flooded villages

The church tower of Derwent slowly disappearing below the water as the reservoir was filled in 1946 Church tower at Ladybower Reservoir.png
The church tower of Derwent slowly disappearing below the water as the reservoir was filled in 1946

The building of the reservoir resulted in the submergence of the villages of Ashopton and Derwent, including Derwent Woodlands church and Derwent Hall. Ashopton stood roughly where the road to the Snake Pass met the Snake valley. The buildings in Ashopton were demolished before the reservoir was filled, but much of the structure of Derwent village was still visible during a dry summer some 14 years later. Derwent Bridge, a narrow stone packhorse bridge, over the Derwent was removed and rebuilt at the head of the Howden reservoir. The clock tower of the church had been left standing and the upper part of it was visible above the water level until 1947, when it was seen as a hazard and demolished with explosives on 15 December. [9]

In 1976, 1995, 2018, [10] and 2022 [11] dry conditions caused the water level to drop and the village of Derwent to once again be exposed.In 2018, this caused unprecedented crowds to visit the rarely visible site. On 3 November 2018, a man had to be rescued by a mountain rescue team after getting stuck in extremely thick mud around the ruins of the village. [10] On 17 November 2018 it was reported that the site had been vandalised by some of those visiting, with park rangers forced to stop visitors removing items from the site and with graffiti scrawled on some buildings. [12]

Potential expansion

In Autumn 2022 Severn Trent Water announced that it was considering expanding the Ladybower, Howden, and Derwent reservoirs, or building a new reservoir in the area. There was immediate opposition to these plans, due to the potential for environmental damage to the landscape, including the loss of ancient forests. [13]

In June 2023, the water company announced that the potential expansion would not be going ahead. They said that in response to consultation feedback the Upper Derwent Valley Reservoir Expansion scheme had been removed from their preferred plan. The scheme would be replaced by a 'combination of leakage, customer demand management and accelerated supply options'. [14]

View from the Ladybower Wall across the water Ladybower view.jpg
View from the Ladybower Wall across the water

See also

Notes

  1. Although there are not many dams of this design, examples include Pontsticill Reservoir in Wales and Monticello Dam in California. [3]

Related Research Articles

The Upper Derwent Valley is an area of the Peak District National Park in England. It largely lies in Derbyshire, but its north eastern area lies in Sheffield, South Yorkshire. Its most significant features are the Derwent Dams, Ladybower, Derwent and Howden, which form Ladybower Reservoir, Derwent Reservoir and Howden Reservoir respectively.

<span class="mw-page-title-main">River Derwent, Derbyshire</span> River in Derbyshire, England

The Derwent is a river in Derbyshire, England. It is 50 miles (80 km) long and is a tributary of the River Trent, which it joins south of Derby. Throughout its course, the river mostly flows through the Peak District and its foothills.

<span class="mw-page-title-main">Birchinlee</span> Human settlement in England

Birchinlee is the site of "Tin Town", a village built by the Derwent Valley Water Board for the workers who constructed the Derwent and Howden Dams between 1902 and 1916. Most of the workers had previously been engaged in the construction, in Wales, of the Elan Valley Reservoirs where the accommodation was very basic. At Birchinlee, a "model village" was built; its infrastructure included hospitals, school, canteen (pub), post office, shops, recreation hall, public bath house, police station, railway station, rubbish dump with incinerator, and much else. One of the shops was a well-stocked store owned by the Gregory brothers from Tideswell. Accommodation consisted of workmen's huts, foremen's huts and married workmen's huts. The latter were decorated to a high standard, as photographs from the period confirm. The population rose to 900 people.

<span class="mw-page-title-main">Derwent Reservoir (Derbyshire)</span> Reservoir in Derbyshire, England

Derwent Reservoir is the middle of three reservoirs in the Upper Derwent Valley in the north of Derbyshire, England. It lies approximately 10 mi (16 km) from Glossop and 10 mi (16 km) from Sheffield. The River Derwent flows first through Howden Reservoir, then Derwent Reservoir and finally through Ladybower Reservoir. Between them they provide practically all of Derbyshire's water, as well as to a large part of South Yorkshire and as far afield as Nottingham and Leicester.

<span class="mw-page-title-main">Howden Reservoir</span> Reservoir in the Peak District, England

The Howden Reservoir is a Y-shaped reservoir, the uppermost of the three in the Upper Derwent Valley, England. The western half of the reservoir lies in Derbyshire and the eastern half is in Sheffield, South Yorkshire; the county border runs through the middle of the reservoir, following the original path of the River Derwent. The longest arm is around 1+14 mi (2.0 km) in length. The reservoir is bounded at the southern end by Howden Dam; below this, the Derwent flows immediately into Derwent Reservoir and subsequently the Ladybower Reservoir. Other tributaries include the River Westend, Howden Clough and Linch Clough.

<span class="mw-page-title-main">River Ashop</span> River in England

The River Ashop is a river in the Derbyshire Peak District, England. Its source is on the eastern slopes of Mill Hill, three miles south east of Glossop and just north of Kinder Scout.

<span class="mw-page-title-main">Severn Trent</span> English water company

Severn Trent plc is a water company based in Coventry, England. It supplies 4.6 million households and business across the Midlands and Wales.

<span class="mw-page-title-main">Carsington Water</span> Reservoir in Derbyshire

Carsington Water is a reservoir, operated by Severn Trent Water, between Wirksworth and Kniveton in Derbyshire, England. The reservoir takes water from the River Derwent at Ambergate during winter months, pumping up to the reservoir by 10.5-kilometre (6.5 mi) 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 36,331 megalitres.

<span class="mw-page-title-main">Bamford</span> Human settlement in England

Bamford is a village in the Peak District, Derbyshire, England, close to the River Derwent. To the north-east is Bamford Edge, and to the north-west the Ladybower, Derwent and Howden Reservoirs. At the 2011 census, it had a population of 1,241.

<span class="mw-page-title-main">Lake Vyrnwy</span> Man-made lake in Wales

Lake Vyrnwy is a reservoir in Powys, Wales, built in the 1880s for Liverpool Corporation Waterworks to supply Liverpool with fresh water. It flooded the head of the Vyrnwy valley and submerged the village of Llanwddyn.

<span class="mw-page-title-main">Cropston Reservoir</span> Reservoir in Leicestershire

Cropston Reservoir lies in Charnwood Forest in Leicestershire, England. The dam and associated water works are in Cropston, while the bulk of the reservoir is in the neighbouring Newtown Linford parish. It was opened in May 1871 in a corner of Bradgate Park, a large expanse of open land northwest of Leicester. It is part of the 987-acre (399.3 ha) Bradgate Park and Cropston Reservoir Site of Special Scientific Interest.

<span class="mw-page-title-main">Clywedog Reservoir</span> Reservoir in the United Kingdom

The Clywedog Reservoir is a reservoir near Llanidloes, Wales on the head-waters of the River Severn. The construction of the reservoir was enabled by an act of Parliament, the Clywedog Reservoir Joint Authority Act 1963, which asserted that "At certain times the flow of water in the river is inadequate ... unless that flow were regulated so as to ensure that at those times water in addition to the natural flow will flow down the river."

<span class="mw-page-title-main">Derwent, Derbyshire</span> Human settlement in England

Derwent was a village 'drowned' in 1944 when the Ladybower Reservoir in Derbyshire, England was created. The village of Ashopton, Derwent Woodlands church, and Derwent Hall were also 'drowned' in the construction of the reservoir.

<span class="mw-page-title-main">River Alport</span> River in England

The River Alport flows for 5.6 miles (9 km) in the Dark Peak of the Peak District in Derbyshire, England. Its source is on Bleaklow, 3 miles (4.8 km) east of Glossop, from which it flows south through the Grains in the Water bog, then over gritstone below the Alport Castles landslide to Alport Bridge on the A57 Snake Pass route from Sheffield to Manchester, where it joins the River Ashop. The Ashop flows into Ladybower Reservoir about 2.5 miles (4.0 km) down the valley, which discharges via the Rivers Derwent and Trent to the North Sea. The source of the Alport is close to the Pennine watershed.

<span class="mw-page-title-main">Yorkshire Bridge</span> Human settlement in England

Yorkshire Bridge is a small hamlet at grid reference SK200850 near the Ladybower Reservoir dam in the English county of Derbyshire. Administratively the area forms part of the civil parish of Bamford and the district of High Peak. The people who built the Ladybower Dam wall lived in the houses at Yorkshire Bridge.

<span class="mw-page-title-main">Ashopton</span> Former village in Derbyshire, England

Ashopton was a small village in Derbyshire, England, in the valley of the River Ashop. The village population was less than 100. Details are included in the civil parish of Aston, Derbyshire. In the early 1940s, the village was demolished to make way for the filling of Ladybower Reservoir.

Severn Trent Water Authority was one of ten regional water authorities established in 1974. Its area of operation was the catchments of the River Trent and River Severn. It assumed the powers and responsibilities of existing water supply authorities in those catchment areas, the Severn River Authority, the Trent River Authority and the sewage and sewage disposal responsibilities of the councils within its area.

The Derwent Valley Water Board was constituted by the Derwent Valley Water Act 1899 to supply the cities of Derby, Leicester, Nottingham and Sheffield, and the county of Derbyshire, with water impounded by a series of reservoirs along the upper reaches of the River Derwent in the Peak District of Derbyshire.

<span class="mw-page-title-main">City of Nottingham Water Department</span> Former water department responsible for water supply in Nottingham (1880–1974)

The City of Nottingham Water Department (1912–1974), formerly the Nottingham Corporation Water Department (1880–1912), was responsible for the supply of water to Nottingham from 1880 to 1974. The first water supply company in the town was the Nottingham Waterworks Company, established in 1696, which took water from the River Leen, and later from springs at Scotholme, when the river became polluted. Other companies were set up in the late 18th century and in 1824, while in 1826 the Trent Water Company was established. They employed Thomas Hawksley as their engineer, who became one of the great water engineers of the period, and Nottingham had the first constant pressurised water supply system in the country. The various companies amalgamated in 1845, and Hawksley remained as the consulting engineer until 1879.

Staunton Harold Reservoir is a large reservoir under the management of Severn Trent Water, located between Melbourne and Ticknall in Derbyshire, England. Most of the water is within Derbyshire but a small part of the southern shore is over the border in Leicestershire. The site is also the home of Staunton Harold Sailing Club.

References

  1. 1 2 Harwood, Stephen (September 2000). "Severn Trent Water, The Ladybower Reservoir Dam Refurbishment Scheme" (PDF). Archived from the original (PDF) on 4 October 2011. Retrieved 24 April 2013.
  2. Brian, Robinson (2012). Walls across the valley : the building of the Howden and Derwent Dams. p 254, table 2. ISBN   978-1-900446-15-0. OCLC   868374001.{{cite book}}: CS1 maint: location (link) CS1 maint: location missing publisher (link)
  3. 1 2 3 Bevis, Gavin (26 October 2019). "Why does Ladybower Reservoir in Derbyshire have plug holes?". BBC News. Retrieved 15 January 2022.
  4. "Pastscape - Detailed Result: MONUMENT NO. 312213". www.pastscape.org.uk. Retrieved 19 December 2017.
  5. "Ladybower Reservoir, c 1945". Picture the Past. Retrieved 28 October 2019.
  6. Woodfield, Amy (14 January 2022). "Ladybower Reservoir's overflowing 'plug holes' attract photographers". BBC News. Retrieved 15 January 2022.
  7. Dent, Martin. "Severn Trent Water's Hydro Expansion" (PDF). Retrieved 24 April 2013.{{cite journal}}: Cite journal requires |journal= (help)
  8. The Upper Catchment
  9. Harry, Gill (1947). The story of the lost villages of Derwent and Ashopton. H. Gill. OCLC   499712295.
  10. 1 2 "Low water levels reveal abandoned village". BBC News. 17 November 2018. Retrieved 25 November 2018.
  11. Hardwick, Thomas. "Remarkable photos show water levels continuing to dwindle at Derbyshire reservoir". Derbyshire Times. National World Publishing Ltd. Retrieved 30 September 2022.
  12. "Rarely seen abandoned village vandalised". BBC News. 25 November 2018. Retrieved 25 November 2018.
  13. Torr, George (13 October 2022). "Severn Trent ponders new reservoir in expansion plan". BBC News. British Broadcasting Corporation. Retrieved 13 October 2022.
  14. Walsh, David. "Campaigners celebrate Severn Trent Water statement on plans for huge Peak District reservoir". Derbyshire Times. National World Publishing Ltd. Retrieved 28 June 2023.

Further reading