Upper Roddlesworth Reservoir

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Upper Roddlesworth Reservoir
Location map United Kingdom Borough of Chorley.svg
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Upper Roddlesworth Reservoir
Shown on the border of Chorley Borough
Location map United Kingdom Blackburn with Darwen.svg
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Upper Roddlesworth Reservoir
Shown on the border of Blackburn with Darwen
Lancashire UK relief location map.jpg
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Upper Roddlesworth Reservoir
Shown in Lancashire
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Upper Roddlesworth Reservoir
Shown in England
Location Lancashire
Coordinates 53°41′35″N2°31′5″W / 53.69306°N 2.51806°W / 53.69306; -2.51806 Coordinates: 53°41′35″N2°31′5″W / 53.69306°N 2.51806°W / 53.69306; -2.51806
Type Reservoir
Primary inflows River Roddlesworth
Primary outflows River Roddlesworth
Basin  countriesUnited Kingdom

Upper Roddlesworth Reservoir is a reservoir on the River Roddlesworth near Abbey Village in Lancashire, England.

Contents

The reservoir is close to Lower Roddlesworth Reservoir and Rake Brook Reservoir and sits within dense woodland.

History

The construction of reservoirs on Rivington Pike was the first major attempt by Liverpool Corporation Waterworks to obtain water from outside of the city of Liverpool. An Act of Parliament obtained in 1847 authorised the construction of reservoirs at Anglezarke, Upper Rivington and Lower Rivington on the western edge of the 10,000 acres (40 km2) of moorland which comprises Rivington Pike. The reservoirs were used to hold water for the supply of drinking water, and were linked to two further reservoirs on the northern edge of the moors at Rake Brook and Lower Roddlesworth by an open channel, 3.75 miles (6 km) long, called The Goit. These were used to supply compensation water, to maintain the flows in the existing river system. The engineer for the project was Thomas Hawksley, and the scheme, which included a bank of filters at Rivington and a 17.3-mile (27.8 km) pipeline to carry the water to Liverpool, was completed in 1857. [1]

Upper Roddlesworth Reservoir was constructed under a separate Act of Parliament, obtained in 1860. It is unclear who designed the reservoir or supervised its construction, although it was not Hawksley. The impounding earth dam was 1,190 feet (360 m) long, and at its highest point was 69 feet (21 m) above the original ground level. The work was completed in 1865, and increased the storage capacity of the Rivington chain by about six per cent. There have been a number of issues with the dam since its construction. In 1904, a swallow hole 8 feet (2.4 m) deep and 5 feet (1.5 m) across appeared in the dam, on the upstream side of the central clay core. The hole was filled with puddle clay, but another hole appeared at that point 21 months later. A vertical shaft was excavated, and a small spring was discovered at a depth of 33 feet (10 m). A search of the archives revealed that the engineer building the dam had encountered problems with springs, but had reported that they had been solved. The solution adopted in 1906 was to install a 12-inch (300 mm) cast iron pipe vertically upwards from the bottom of the shaft, with a 4-inch (100 mm) outlet feeding into the reservoir. The bottom 7 feet (2.1 m) of the shaft were then filled with stones and gravel, while the rest of it was packed with puddle clay, and no subsequent subsidence occurred at that site. [2]

However, a similar problem occurred elsewhere on the dam in January 1908, when a hole approximately 4 feet (1.2 m) across appeared near to the puddle clay core. Excavation of the hole revealed running water at a depth of 26.5 feet (8.1 m), and this was dealt with in a similar fashion to the previous hole. Further problems occurred in January 1954, when the toe of the dam, which was formed of sand, was washed away as a result of heavy rainfall. Water running off from the higher ground at either side of the dam ran along a berm near the foot of the dam, causing the sand to flow away, and a landslip to occur. This was resolved by improving the drainage system on the downstream side of the dam, and by creating channels to divert run-off water away from the dam at its outer edges. [3]

As a result of the passing of the Water Act 1973, responsibility for Liverpool's water supply and sewerage passed to a regional water authority, and thus Upper Roddlesworth Reservoir became one of the assets of the newly-formed North West Water Authority. [4] The Conservative Party then saw privatisation as a way to deal with the huge funding gap facing the water industry, and responsibility for the reservoir passed to the water and sewerage company North West Water plc following the passing of the Water Act 1989. [5] North West Water merged with Norweb in 1995 to become United Utilities, the present owners of the asset. [6] The water now supplies customers in the Wigan area rather than in Liverpool. [7] The reservoir holds around 163 million imperial gallons (740 Ml) when full. [8]

Bibliography

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References

  1. Binnie 1981, pp. 138–140, 283.
  2. Binnie 1981, pp. 140–141.
  3. Binnie 1981, p. 141.
  4. Porter 1978, pp. 21, 28.
  5. Ofwat 2006, pp. 31, 33.
  6. "Our recent history". United Utilities. Archived from the original on 13 April 2012. Retrieved 22 September 2018.
  7. "Hezza opens £38m water plant". Bolton News. 11 December 1995. Archived from the original on 15 September 2018.
  8. Binnie 1981, p. 283.