Llyn Cefni

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Coordinates: 53°16′16″N 4°20′8″W / 53.27111°N 4.33556°W / 53.27111; -4.33556
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Llyn Cefni
The eastern side
Llyn Cefni is located in Anglesey
Llyn Cefni
Llyn Cefni
LocationAnglesey, Wales
Coordinates53°16′16″N 4°20′8″W / 53.27111°N 4.33556°W / 53.27111; -4.33556
TypeReservoir
Primary outflowsAfon Cefni
Basin countriesUnited Kingdom
Max. length2.3 km (1.4 mi)
Surface area86 ha (210 acres)
Water volume400 million imperial gallons (1.8 hm3; 1,500 acre⋅ft)

Llyn Cefni is a small

Welsh Water and Hamdden Ltd, while the fishery is managed by the Cefni Angling Association.[1] The reservoir is located just 1 kilometre (0.6 mi) northwest of the island's county town of Llangefni
.

History

During World War II, a water scheme was devised for the town of Llangefni in central Anglesey. It involved water from a local source being pumped to two settling tanks in the Dingle part of the town. From here the water was pumped across the river to a reservoir and water tower, on the site of the present Pennant Estate. These arrangements became redundant with the building of the Cefni Reservoir, which was completed in 1951, but the settling tanks and pumping station survive in Llangefni to this day. The new scheme was designed to supply most of the water needs for the people of Anglesey for the foreseeable future.[2]

Geography

The

Tregaian with other streams flowing from the northwest, and the reservoir has a catchment area of about 9,400 acres (3,800 ha).[3]

The reservoir is fed by two main streams, the Afon Frogwy entering from the west and the Afon Erddreiniog from the north east end.

embankment which crosses the water.[4] The reservoir is easily accessible from Llangefni, as well defined paths run from the town through the local nature reserve, The Dingle, one of the few ancient woodland sites on the island.[5] It can also be accessed by the Lôn Las Cefni cycleway which follows the Afon Cefni from The Dingle and divides at the dam.[1]

In the summer of 2011, toxic blue-green algae were found in the reservoir and visitors were advised to avoid contact with the water.[6]

A photo of the dam and Llyn in 2012

References

  1. ^ a b c d "Landscape: Llyn Cefni". Visit Anglesey. Retrieved 15 June 2016.
  2. ISBN 978-1-4456-5153-8
    .
  3. ^ Institution of Municipal Engineers, London (1951). Proceedings.
  4. ^ Christensen, Mike (Autumn 1991). "Single Line Working on the Anglesey Central Railway". British Railway Journal (38). Wild Swan: 367–379.
  5. ^ "Lottery cash aids island reserve". BBC News. 15 April 2004. Retrieved 15 June 2016.
  6. ^ "Blue green algae found at Llyn Cefni Reservoir and Llyn Coron". Island of Anglesey County Council. 2 August 2011. Retrieved 15 June 2016.
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