Ulley Reservoir
Encyclopedia
Ulley Reservoir is a reservoir
Reservoir
A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...

 located a few hundred metres to the west and downhill of the village of Ulley
Ulley
Ulley is a village and civil parish of the Metropolitan Borough of Rotherham in South Yorkshire, England. It is located about south of the town of Rotherham and east of Sheffield City Centre.-History:...

, 4 miles (6.4 km) south of Rotherham
Rotherham
Rotherham is a town in South Yorkshire, England. It lies on the River Don, at its confluence with the River Rother, between Sheffield and Doncaster. Rotherham, at from Sheffield City Centre, is surrounded by several smaller settlements, which together form the wider Metropolitan Borough of...

, South Yorkshire
South Yorkshire
South Yorkshire is a metropolitan county in the Yorkshire and the Humber region of England. It has a population of 1.29 million. It consists of four metropolitan boroughs: Barnsley, Doncaster, Rotherham, and City of Sheffield...

, England
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

. It is 2.5 miles (4 km) away from junction 33 of the M1 motorway
M1 motorway
The M1 is a north–south motorway in England primarily connecting London to Leeds, where it joins the A1 near Aberford. While the M1 is considered to be the first inter-urban motorway to be completed in the United Kingdom, the first road to be built to motorway standard in the country was the...

.

History

The reservoir
Reservoir
A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...

 was built in 1871 by damming the brooks of Ulley and Morthen, to provide the town of Rotherham with approximately 180 million gallons (820 million litres) of drinking water per year. There are two main ponds, the larger one is used for angling
Angling
Angling is a method of fishing by means of an "angle" . The hook is usually attached to a fishing line and the line is often attached to a fishing rod. Fishing rods are usually fitted with a fishing reel that functions as a mechanism for storing, retrieving and paying out the line. The hook itself...

 and dinghy sailing
Dinghy sailing
Dinghy sailing is the activity of sailing small boats by using five essential controls:* the sails* the foils ....

, and the smaller one is now a nature reserve.

The dam
Dam
A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

 is an earth embankment made of a clay core and earth filled shoulders. In 1969 the dam wall was built up by 6.6 feet (2 m) with plastic concrete and relevelled. The spillways and overflow are made of ashlar
Ashlar
Ashlar is prepared stone work of any type of stone. Masonry using such stones laid in parallel courses is known as ashlar masonry, whereas masonry using irregularly shaped stones is known as rubble masonry. Ashlar blocks are rectangular cuboid blocks that are masonry sculpted to have square edges...

 pitching set on concrete
Concrete
Concrete is a composite construction material, composed of cement and other cementitious materials such as fly ash and slag cement, aggregate , water and chemical admixtures.The word concrete comes from the Latin word...

. It is 41.3 feet (12.6 m) in height with a slope of 12.7 degrees, with two lateral overflow stepped spillways. The reservoir covers an area of 35 acres (14 ha) and is about 46 feet (14 m) deep.

In the 1980s it was decided that it was no longer needed for water supplies and was sold to Rotherham council for £1. The council turned the venue into the centrepiece of Ulley Country Park, with the water hosting sailing and fishing.

Ecology

The reservoir and the surrounding country park are a haven for a variety of wildlife. Over 150 species of flowering plants have been recorded in the park, creating an abundance of both insects and butterflies. The bird species include; Mallard
Mallard
The Mallard , or Wild Duck , is a dabbling duck which breeds throughout the temperate and subtropical Americas, Europe, Asia, and North Africa, and has been introduced to New Zealand and Australia....

, Tufted Duck
Tufted Duck
The Tufted Duck, Aythya fuligula, is a medium-sized diving duck with a population of close to one million birds.- Description :The adult male is all black except for white flanks and a blue-grey bill. It has an obvious head tuft that gives the species its name.The adult female is brown with paler...

, Little Grebe
Little Grebe
The Little Grebe , also known as Dabchick, member of the grebe family of water birds. At 23 to 29 cm in length it is the smallest European member of its family. It is commonly found in open bodies of water across most of its range.-Description:The Little Grebe is a small water bird with a pointed...

, Great Crested Grebe
Great Crested Grebe
The Great Crested Grebe is a member of the grebe family of water birds.- Description :The Great Crested Grebe is long with a wingspan. It is an excellent swimmer and diver, and pursues its fish prey underwater. The adults are unmistakable in summer with head and neck decorations...

, Coot
Coot
Coots are medium-sized water birds that are members of the rail family Rallidae. They constitute the genus Fulica. Coots have predominantly black plumage, and, unlike many of the rails, they are usually easy to see, often swimming in open water...

, Moorhen
Moorhen
Moorhens, sometimes called marsh hens, are medium-sized water birds that are members of the rail family Rallidae. They constitute the genus Gallinula....

, Dragonfly
Dragonfly
A dragonfly is a winged insect belonging to the order Odonata, the suborder Epiprocta or, in the strict sense, the infraorder Anisoptera . It is characterized by large multifaceted eyes, two pairs of strong transparent wings, and an elongated body...

, Kingfisher
Kingfisher
Kingfishers are a group of small to medium sized brightly coloured birds in the order Coraciiformes. They have a cosmopolitan distribution, with most species being found in the Old World and Australia...

, Grey Heron
Grey Heron
The Grey Heron , is a wading bird of the heron family Ardeidae, native throughout temperate Europe and Asia and also parts of Africa. It is resident in the milder south and west, but many birds retreat in winter from the ice in colder regions...

, Swallow
Swallow
The swallows and martins are a group of passerine birds in the family Hirundinidae which are characterised by their adaptation to aerial feeding...

, Swift
Swift
The swifts are a family, Apodidae, of highly aerial birds. They are superficially similar to swallows, but are actually not closely related to passerine species at all; swifts are in the separate order Apodiformes, which they share with hummingbirds...

, House Martin
House Martin
The Common House Martin , sometimes called the Northern House Martin or, particularly in Europe, just House Martin, is a migratory passerine bird of the swallow family which breeds in Europe, north Africa and temperate Asia; and winters in sub-Saharan Africa and tropical Asia...

 and Kestrel
Kestrel
The name kestrel, is given to several different members of the falcon genus, Falco. Kestrels are most easily distinguished by their typical hunting behaviour which is to hover at a height of around over open country and swoop down on prey, usually small mammals, lizards or large insects...

.

June 2007 cracks in the dam

On 25 June 2007, cracks in the reservoir walls were found after heavy rains and flooding in the area, causing concerns that the reservoir might burst, prompting the evacuation of the three nearest villages Whiston
Whiston, South Yorkshire
Whiston is a village and civil parish in the Metropolitan Borough of Rotherham in South Yorkshire, England. It has a population of 5,115.Originally a small rural village between Sheffield and Rotherham, within the Saxon "Shire of Hallun" , Whiston is now a suburb of Rotherham, close to its border...

, Treeton
Treeton
Treeton is a village and civil parish of the Metropolitan Borough of Rotherham in South Yorkshire, England. It is located about south of the town of Rotherham and east of Sheffield City Centre.-History:...

 and Catcliffe
Catcliffe
Catcliffe is a village and civil parish on the north-west bank of the River Rother in South Yorkshire, England. It is located in the Metropolitan Borough of Rotherham, about south of the town of Rotherham and east of Sheffield City Centre.-History:...

. Several other areas as far away as Canklow
Canklow
Canklow is a suburb of Rotherham, England on the Sheffield/Rotherham border. It is about 0.9 miles south of the town of Rotherham and 5.2 miles north-east of the City of Sheffield....

 were put on emergency flood alert. The M1 motorway
M1 motorway
The M1 is a north–south motorway in England primarily connecting London to Leeds, where it joins the A1 near Aberford. While the M1 is considered to be the first inter-urban motorway to be completed in the United Kingdom, the first road to be built to motorway standard in the country was the...

 was also closed between junctions 32 and 36 amid fears over safety. This led to 700 local residents being evacuated from their homes. Fire crews used seventeen high volume pumps to remove four million litres of water per hour from the reservoir.

The possibility of the dam being susceptible to cracking had been discussed in 1970, at a conference about problems with dams of a similar age and construction; however, it is not known if the "concrete pads" observed at the reservoir are actually piezometer
Piezometer
A piezometer is either a device used to measure static liquid pressure in a system by measuring the height to which a column of the liquid rises against gravity, or a device which measures the pressure of groundwater at a specific point...

s installed to measure sub-surface water levels within the dam, as discussed at the 1970 conference.

It was feared that, if the reservoir's dam was breached, the sudden flow of water could bring down high voltage power lines, and flood the nearby M1 and a crucial regional electricity substation, which supplies the power to the whole of Sheffield.

External links

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