Image Birth name

also known as

Kingdom of origin Title and notes Years evidenced Death date and cause
Before this period only the title King of Wales or King of the Britons was used
Gruffudd ap Cynan Gwynedd Prince...of all the Welsh[1] 1136[1] Died 1137 at 81-82 years old.
Owain ap Gruffudd

Owain Gwynedd

Gwynedd Prince of Wales[2]

Prince of the Welsh (first to use this style to indicate independence, sovereignty and supremacy over other native rulers)[3][4][5]

~1165[4][5] Died 1170 at 69-70 years old.
Rhys ap Gruffydd

Yr Arglwydd Rhys (The Lord Rhys)

Deheubarth Prince of Wales[6] 1165[7]

1184[7] 1197[1][7]

Died 1197, at 65 years old.
Llywelyn ap Iorwerth

Llywelyn Fawr (Llywelyn the Great)

Gwynedd Prince of Wales[8]

Referred to by Welsh and English chroniclers as "Prince of Wales". Held a "principality" of Wales but used title "Prince of Aberffraw and lord of Snowdon", with Aberffraw suggesting supremacy over all Wales and homage from all other Kings[9]

1240[1] Died 1240 at 66-67 years old.
Dafydd ap Llywelyn Gwynedd Prince of Wales[2][10] 1245[10] Died suddenly in 1246, at 33 years old.
Llywelyn ap Gruffudd

Llywelyn ein Llyw Olaf (Llywelyn the Last)

Gwynedd Prince of Wales[2][11] 1255[1] 1258, 1262, 1267[12] Killed by English soldiers under guise of peace talks on 11 December 1282 at 59 years old.[13]
Dafydd ap Gruffydd Gwynedd Prince of Wales[2] 1282[2][14], 1283[15] Hung drawn and quartered on 3 October 1283 after capture by English soldiers.
English rule begins following killing of Llywelyn & Dafydd ap Gruffydd
Madog ap Llywelyn Gwynedd Prince of Wales[2] 1294[2][16] Kept as a prisoner in London.
Owain ap Tomas

Owain Lawgoch (Owain Redhand)

Gwynedd Prince of Wales[17] 1363[17] Assassinated July 1378[17]
Owain ap Gruffydd

Owain Glyndŵr

Powys, Deheubarth, Gwynedd Prince of Wales[2] 1400[2] Died 1415, at 55-56 years age and buried in secret.



Image Name Kingdom of origin Secondary source Title period evidenced Cause of death Historical source
Before this period only the title King of Wales or King of the Britons was used
Gruffudd ap Cynan Gwynedd Prince...of all the Welsh[citation needed] 1137 Died 1137, at 81-82 years old. Brut y Tywysogion:

"king and sovereign and prince and defender and pacifier of all the Welsh" in 1136[1] King of all the Welsh, King of all Wales in 1137[citation needed]

Owain Gwynedd Gwynedd Prince of Wales[2] 1146–1170 Died 1170 at 69-70 years old. Brut y Tywysogion; modern charts:

Prince over the British country (1146); King of Wales, King of the Welsh, Prince of the Welsh[18]

Prince of Wales
Rhys ap Gruffydd Deheubarth Prince of Wales[6] 1184–1197 Died 1197, at 65 years old. Brut y Tywysogion; modern charts

"head and shield and strength of the South and of all Wales" (1197)[1]

Prince of the Welsh (1184)[citation needed]

Llywelyn ap Iorwerth Gwynedd Prince of Wales[8] 1228–1240 Died 1240 at 66-67 years old. Brut y Tywysogion; modern charts:

Prince of Wales (1240)[1]

Prince of the Welsh (1228)[citation needed]

Dafydd ap Llywelyn Gwynedd Prince of Wales in 1244[2][10] 1220–1246 Died suddenly in 1246, at 33 years old. Agreement with England[citation needed]
Llywelyn ap Gruffudd Gwynedd Prince of Wales[2] 1258–1282 Killed 11 December 1282 at 59 years old.

Killed by English soldiers under the guise of peace talks. His head was paraded and placed on a spike at the Tower of London.[13]

Brut y Tywysogion; Agreement with Scotland, agreement with England, charters etc.

(1255, 1264,1267)[1] (1258, 1258–82)[citation needed]

Dafydd ap Gruffydd Gwynedd Prince of Wales in 1282[2] 1282–1283 Killed 3 October 1283.

Hugh, drawn and quartered after capture by English soldiers. His head placed next to Llywelyn's.

Letters[14][citation needed]
English rule begins following killing of Llywelyn & Dafydd ap Gruffydd
Madog ap Llywelyn Gwynedd Prince of Wales in 1294[2] 1294–1295 Kept as a prisoner in London. Penmachno Document[citation needed]
Owain Lawgoch Gwynedd Prince of Wales[17] Proclaimed Assassinated. [citation needed]
Owain Glyndŵr Powys, Deheubarth,Gwynedd Prince of Wales[2] 1400 – 1415 1415, at 55-56 years age. Buried in secret. Pennal Letter[citation needed]













Water in Wales

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The Welsh Government is responsible the strategic policy for water in Wales. This includes water companies entirely or mostly in Wales which are Dŵr Cymru and Hafren Dyfrdwy, Ofwat, Natural Resources Wales, the Drinking Water Inspectorate and local authorities.[19]

Natural Resources Wales is the body responsible for regulating and managing water resources in Wales.[20]

Establishment of Natural Resources Wales

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On 01 April 2013, Natural Resources Wales took over the responsibilities of the Countryside Council for Wales, Environment Agency Wales and the Forestry Commission Wales.[21][22] Since 2013, Natural Resources Wales states that it has established a standalone capability and has developed its own systems that are appropriate for Wales.[23]

State of Water (2022)

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  • All designated bathing waters in Wales except one met the Bathing Waters Directive standards in 2016
  • 63% of freshwater water bodies did not reach the good or better overall status in 2015 (defined by the Water Framework Directive)
  • Pollutants from metal mines have an impact on 700 kilometres of rivers in Wales with nine of the ten worst polluted catchments in the UK[23]

Water industry ownership

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The Welsh government has decided not to pursue deregulation of the water industry, except for large industrial users that consume over 50 million litres of water annually.[24]



[25]

Year £ million £ per head Index of £ per head (UK=100)
1992 22,659 7,874 83
1993 23,697 8,218 83
1994 25,049 8,675 83
1995 26,388 9,135 84
1996 27,518 9,517 82
1997 28,672 9,904 80
1998 29,787 10,273 79
1999 30,736 10,596 77
2000 31,898 10,973 77
2001 33,525 11,520 77
2002 35,252 12,074 77
2003 37,262 12,712 76
2004 39,340 13,352 76
2005 40,711 13,784 76
2006 42,697 14,396 75
2007 44,263 14,853 74
2008 45,610 15,237 74
2018 65,089 20,815 70





Penal Laws content save

Penal laws applied to the Welsh

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In early 1401, multiple anti-Welsh statutes and ordinances were passed with more being added in 1402. These later become known as the Penal Laws.[26]

The penal laws applied to the Welsh in 1402 were:[27]

  • Englishman shall not be convict[ed] by Welshman in Wales (this included Welsh through marriage);
  • Against wasters minstrels etc. in Wales ("Item, to eschew many diseases and mischiefs, which have happened before this time in the land of Wales…: it is ordained and stablished that no waster, rhymer, minstrel nor vagabond be in any wise sustained in the land of Wales…")
  • Against congregations in Wales (public meetings were banned)
  • Welshmen shall not be armed ("no Welshman be armed nor bear defensible armour")
  • No victual or armour shall be carried into Wales (it was banned for an Englishman to carry armour to Wales or a Welshman to possess such items of battle)
  • Welshmen shall not have castles etc (only the castles from the time of Edward I were allowed to be used)
  • No Welshman shall bear office ("Justice, Chamberlain, Chancellor, Treasurer, Sheriff, Steward, Constable of Castle, Receiver, Escheator, Coroner, nor Chief Forester nor any other Officer, nor Keeper of the Records, nor Lieutenant in any of the said Offices in no part of Wales, nor of the Council of any English lord…")[27]

In 1431, 1433 and 1471 the English Parliament insisted upon re-asserting the Penal Laws.[28]

Effects

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Discrimination and psychological effect

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Welsh historian, RR Davies said English and Welsh people "were now formally and legally separated from one another, to the disadvantage of the Welsh, in a way which had not been so before, at least legislatively and on a country-wide basis."[29]: 281  Davies adds that the laws were possibly more effective as psychological propaganda, rather than in practical application.[26] Welsh historian Martin Johnes also says that the laws were rarely implemented, but symbolised how there was no ethnic equality between the English and the Welsh.[30]

The laws weighed heavily on the Welsh[31] and restricted them from living a complete life.[32] This caused significant ill-feeling among the Welsh people and restricted nobles in Wales from improving their standing, unable to get a job in their local municipality.[33] Historian Glanmor Williams says that the laws were a reminder to the Welsh of their inferiority and insecurity despite multiple exemptions. The laws stayed on the statute book and were resented by the Welsh people.[34] Adam of Usk says that the laws were "harsh" English decrees against Anglo-Welsh marriage.[35]

Welshmen find ways around laws

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Some Welshmen had the English parliament declare themselves English so that they were able to achieve higher office. Despite this, in everyday life, people were able to overcome racial hierarchy in trade and marriage. In the century following the laws, the Welsh Marches were lawless to a degree which allowed Welsh gentry to hold junior positions of responsibility across Wales, despite the penal laws. Although their lands grew, their second class identity however, remained. Some English nobles intermarried with Welsh women and internalised a Welsh identity, suggesting Wales had a complex colonial identity. There was a growing sense of a denial of social opportunity for the Welsh and governance remained unorganised.[30]

According to Welsh barrister Thomas Glyn Watkin, despite the periodic reimposing of the laws, some Welshmen served the English crown with grants opening a path to wealth and social standing in Wales and at court and English king, Henry VII gave relief to those loyal to him via denizenship (gaining some rights including to hold land), but did not end the Penal laws.[36]

Rebellion

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Phil Carradice says that the laws of English domination encouraged more men to join in the Welsh Revolt, led by Owain Glyndŵr.[37] This view is also suggested by author Jon Gower, who says that the Penal Laws of 1401-1402 banned the Welsh people from gaining land or property across the border, or from making fortifications to their own houses, or bearing arms or congregating in mass numbers or encouraging bards. He says that these laws only encouraged the Welsh to revolt.[38] The laws encouraged more Welsh citizens to support Glyndŵr's revolt with Welsh labourers, students and nobles leaving England to support the cause.[39] According to historian Geraint Jenkins, the racist penal code of 1401-2 applied subordinate, second-class citizen status to the Welsh and there were no new rebellions against the English crown. A deep sense of anger remained, but hope of a united independent Wales led by a native Welsh prince had faded away. Jenkins says that English administrators reminded the Welsh of the price to pay for rebellion against the Crown.[40]

Modern interpretations

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Author, Gareth Elwyn Jones says that the Penal laws sought an apartheid system with historian Martin Johnes also using the term for the system which the Penal Laws brought about.[41][30]

Politician, Adam Price has also described the punitive laws as introducing a system of racial discrimination equal to apartheid, and suggests that the memory of the race laws have been affected by a collective amnesia.[42]

Lifting of laws

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Welsh people negotiated for and purchased charters from 1504-1507 to lift some dues, Bondmen were enfranchised and tenure of land was allowed via fee simple or fee tail. There remained doubt about their legal validity.[43]

Many were relieved by the Laws in Wales Acts 1535 and 1542 which was perceived to end the discriminatory system.[30] However, it was not until 1621, when Welsh MP James Perrot of Pembrokeshire moved a Bill which sought to more systematically remove obsolete acts from the statute books. These included 14 penal laws against the Welsh people by Henry IV of England.[44] Although this had been promised to the Welsh in 1536, laws were not expunged from the statue books until 1624.[44][45]









This is an overview of Water bodies and their regulation in Wales.

Responsibility

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Water quality, water resources and river management are the responsibility of Natural Resources Wales. Issues relating to the water industry in general are devolved to the Senedd. This is however subject to the reservations in Schedule 7A to the Government of Wales Act 2006 (GoWA 2006).[46] Natural Resources Wales is responsible for managing water resources in Wales and is the regulatory body for this purpose.[47] On 01 April 2013, Natural Resources Wales took over the responsibilities of the Countryside Council for Wales, Environment Agency Wales and the Forestry Commission Wales.[48][49] Since 2013, Natural Resources Wales states that it has established a standalone capability and has developed its own systems that are appropriate for Wales.[50]

State of Water

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  • All designated bathing waters in Wales except one met the Bathing Waters Directive standards in 2016
  • 63% of freshwater water bodies in Wales did not meet the overall status of good or better in 2015 (defined by the Water Framework Directive)
  • Pollutants from metal mines have impacted 700 kilometres of rivers in Wales with nine out of the ten worst polluted catchments in the UK affected[50]

Water industry ownership

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The Welsh government has decided not to pursue deregulation of the water industry, except for large industrial users that consume over 50 million litres of water annually.[51]

Water bodies

edit

Current Welsh performance

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Olympics

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In terms of medals won per population head, an alternative table includes countries that have won a minimum of one gold medal, Welsh athletes come second in the world (behind New Zealand only) based on medals per capita.[52] Welsh athletes won more medals per head than any other country or region in the UK, at the 2016 Rio Summer Olympics.[53]

Team Wales at the Commonwealth Games

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Sport has been described as Wales' most significant platform, internationally. Wales competes separately, alongside other Home Nations, at the Commonwealth Games, with such representation said to give visibility to Wales internationally.[54] Professor Stead stated in reference to the 1958 Commonwealth Games, "It was only as a result of the success of the Wales team in these Games, that the government was finally forced to officially recognise the Red Dragon as the flag of Wales."[55] Stead stated that the games "give Wales a sense of confidence in our own identity, starting a process which led to the establishment of the National Assembly, and which is still ongoing today".[54][55] The Commonwealth Games are one of the competitions where Wales can compete on an international level.[56]

At the 2014 Commonwealth Games in Glasgow, Scotland, the Welsh delegation achieved its most successful medal count in any Commonwealth Games up to that point. Winning 36 medals, including five gold, eleven silver and 20 bronze.[57] In 2022, Wales finished eighth with 28 medals.[58]

Opposition to Great Britain sport teams

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There has been opposition to a 'Team GB' delegation in specific Olympic sports, such as football[59] and rugby sevens[60] and there is very little active support in Wales for a UK football team.[61]

The FAW and some fans criticised a Great Britain Olympic football team for the 2012 Olympics over fears it would impact Wales' status and identity as an individual nation in international football.[60] Gareth Bale attracted criticism from the FAW and some fans when wearing a GB shirt, whereas Aaron Ramsey declared he would not be part of any such Olympic GB football team. [62] Rugby sevens winger Lloyd Lewis stated a GB Rugby Sevens team would impact Welsh players' opportunities with more competition.[63] The GB team competed previously in 2021 due to funding cuts, with the decision for a GB team at the 2023 World Sevens Series agreed by the Welsh Rugby Union.[64]

Other sources

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Scottish sports commentator for ESPN, Derek Rae has advocated for the countries of the UK to have their own national Olympic football teams, saying "In our sport, ENG, SCO, NI & Wales are separate entities."[65]

"Y Chwyldro" ("The revolution") has also supported an independent Wales with its own Olympic Team.[66]

Paula Radcliffe has supported Scotland, Wales, England and Northern Ireland having their own national teams for international competitions.[67]

The political party Gwlad[68] and Welsh Football Fans for Independence have supported the proposals for a Welsh Olympic team.[69]


A Senedd petition for a Wales national Olympic team by 2012 was created by Dr Geraint Tudur, previously of Bangor and at the time, the general secretary of the Union. Tudur stated, "We call upon the National Assembly for Wales to ensure that a team from Wales competes in the 2012 Olympic Games and every subsequent game thereafter.” The petition received 50 signatures by 21 August 2008. [70]

Welsh independence supporters that need better citations

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Princess of Wales

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Princess of Wales (Welsh: Tywysoges Cymru) was a title held by the spouse of the native Prince of Wales before its current use as the title of the spouse of the heir apparent to the British throne, and Prince of Wales.

The last native Princess of Wales was Eleanor de Montfort, following the killing of Llywelyn ap Gruffydd by English soldiers.[82] The first English Prince of Wales was then appointed heir apparent of the English crown was appointed after Llywelyn ap Gruffydd was killed.[83] The title has also been retroactively used for the spouse of native Prince of Wales Owain Glyndwr, who later led the Welsh Revolt against English rule in Wales.[84][85] The current title-holder is Catherine, wife of William, Prince of Wales, heir apparent of the British monarchy.[82]

Dams in Wales[86]

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Number Reservoir Name Reservoir Status Location Local authority Manager name Reservoir category Year built Maximum dam height (m) Raised capacity (m3) Top water level (maod) Surface area (m2) Top of dam (maod)
1 Cae Llwyd Under Construction (S6 Supervision) Near Wrexham Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Impounding 1878 15 177000 278.46 40300 279.42
2 Llwyn Onn 1 Under Construction (S6 Supervision) Abenbury, Wrexham Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Non Impounding 2017 6.5 12074 76.1 2236 76.4
3 Pengarnddu Under Construction (S6 Supervision) Pengarnddu, Merthyr Tydfil Merthyr Tydfil County Borough Council Dwr Cymru Cyfyngedig Non Impounding 2021 5.74 11451 408.62 1498 409.62
4 Pontarddulais Flood Storage Area Under Construction (S6 Supervision) Pontardulais City and County of Swansea Natural Resources Wales (FRM) Impounding 2014 9.3 170250 111.2 59100
5 Pen-y-Gwely Under Construction (S6 Supervision) Near Oswestry Powys County Council Hafren Dyfrdwy Cyfyngedig Impounding 1894 18 114000 332.18 18700 333.74
6 Llwyn Onn 2 Under Construction (S6 Supervision) Wrexham Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Non Impounding 2018 7.5 12245 76.1 2268 76.4
7 Llyn Mawr Under Construction (S6 Supervision) Llanarthne, Carmarthen Carmarthenshire County Council National Botanic Garden of Wales Impounding Main dam: Earthfill, Saddle dam: Earthfill Main dam: 6, Saddle dam: 62500 53.8 37000 Main dam: 55.1, Saddle dam:
8 Rhyl Golf Course FSA Under Construction (S6 Supervision) Rhyl Denbighshire County Council Denbighshire County Council Non Impounding 2015 Rhyl Golf Course - Sea Wall: 1.4, Rhyl Golf Course -  Western Wall: 1.4, Rhyl Golf Course -  Southern Embankment: 1.4 145000 6 150000 Rhyl Golf Course - Sea Wall: 6.3, Rhyl Golf Course -  Western Wall: 6, Rhyl Golf Course -  Southern Embankment:
9 Dolwen Under Construction (S6 Supervision) Llanefydd, nr Abergele Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1905 14.9 221000 167.84 63000 170.84
10 Pendinas Under Construction (S6 Supervision) Near Minera Denbighshire County Council Hafren Dyfrdwy Cyfyngedig Impounding 1898 Dam 4: 10, Dam 1: 4, Dam 2: 4, Dam 3: 4 282000 391.63 78000 Dam 4: 391.992, Dam 1: 392.249, Dam 2: 392.172, Dam 3: 392.06
11 Ty'n y Caeau Under Construction (S6 Supervision) Menai Bridge, Anglesey Isle of Anglesey County Council Isle of Anglesey County Council Impounding 1923 4.5 12500 4300
12 Afon Dafen Crossing In Operation Near Llanelli Carmarthenshire County Council Carmarthenshire County Council Impounding 1993 5.5 65000 39000
13 Celyn In Operation Near Bala Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1966 44.8 80930850 296.18 3300000 299.77
14 Ref 5 In Operation Amlwch Anglesey County Council Parys Mountain Mines Ltd Impounding Not Known 1.75 11534 6591
15 Llyn Ffrith Carreg-y-Bwch In Operation Pont y Pant Gwynedd Council Individual(s) Impounding 1850 SW (Main) Dam: 8.756, SE (Saddle) Dam: 8.756 17112 225.425 11707 SW (Main) Dam: 227.3, SE (Saddle) Dam: 226.6
16 Cefnllan In Operation Aberystwyth Ceredigion County Council Dwr Cymru Cyfyngedig Non Impounding 1964 5 10414 86 3880 88
17 Sluvad No.3 In Operation Pontypool Torfaen County Borough Council Dwr Cymru Cyfyngedig Non Impounding Not Known 5.2 22700 142 3725 144
18 Llyn Du-bach In Operation Blaenau Ffestiniog Gwynedd Council Individual(s) | Welsh Slate Ltd Impounding Not Known 3.442 32347 448 17729
19 Tan-y-Graig In Operation Llanelltyd, Dolgellau Gwynedd Council Natural Resources Wales (WGWE) | Individual(s) Impounding North East Dam: Earthfill, South West Dam: Earthfill North East Dam: 4, South West Dam: 13000 130.5 9200 North East Dam: 131, South West Dam:
20 Cwm Dulyn In Operation Near Penygroes Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1901 2.3 704016 238.88 135000 240.65
21 Brynmill Park Lake In Operation Near Swansea City and County of Swansea City and County of Swansea Impounding 1840 4.5 36800 12000
22 Bryn Bach Park Lake In Operation Near Merthyr Tydfil Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding 1982 15 175000 367.29 124700 5.35
23 Cwmtillery Lake In Operation Cwmtillery Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding Not Known 2.5 10449 289.72 9612 291.5
24 Marchlyn Bach In Operation Near Deinolen Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1969 10 352000 481.99 51510 484.7
25 Llys-y-Fran In Operation Near Haverfordwest Pembrokeshire County Council Dwr Cymru Cyfyngedig Impounding 1971 35 1040000 96.14 800000 34.15
26 Teifi In Operation Near Pontrhydfendigaid Ceredigion County Council Dwr Cymru Cyfyngedig Impounding 1960 6 850000 253000
27 Pen-y-Gwaith In Operation Gwydyr Forest, Llanrwst Conwy County Borough Council Natural Resources Wales (WGWE) Impounding 1875 2 11336 6870
28 Llwynfilly In Operation Glasbury Powys County Council Individual(s) Impounding 1970 4.21 13848 145.355 7867 145.95
29 Cwm Clydach In Operation Neath Abbey Neath Port Talbot County Borough Council OWNERLESS DAM | Neath Port Talbot County Borough Council | Glynclydach Dam Ltd | The Trustees of Victor Johnson SSAS Impounding 1840 11 45000 37.02 20000
30 Shon Sheffrey In Operation Near Tredegar Blaenau Gwent County Borough Council Dwr Cymru Cyfyngedig Impounding 1896 14 350000 365.48 72846
31 Llangeinor (282) In Operation Llangenior, Bridgend Bridgend County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1926 6 10360 197 2420 199
32 Syke Farm Reservoir In Operation Red Roses Carmarthenshire County Council Individual(s) Impounding 7.251 31541 8700 111.614
33 Afon Rhyd Hir (FRM) In Operation Pwllheli Gwynedd Council Natural Resources Wales (FRM) Impounding 1813 5 164000 128287
34 Machine Pond In Operation Brynmawr Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding Not Known 2.391 22187 22187
35 Lluest Wen In Operation Near Maerdy Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Impounding 1972 21 1080000 407 110000
36 Usk In Operation Llandovery Powys County Council Dwr Cymru Cyfyngedig Impounding 1955 31 12253000 306.35 1160000 308.46
37 Hafod-y-Llyn In Operation Near Rhyd, Porthmadoc Gwynedd Council Individual(s) Impounding 1870 South Dam: 2.924, East Saddle: 1 50000 126.752 21000 South Dam: 127.418, East Saddle: 126.952
38 Firewater Reserve In Operation Robeston West, near Milford Haven Pembrokeshire County Council Puma Energy (UK) Limited Impounding 1995 4.34 16000 42.77 11230 43.47
39 New Pond In Operation Margam Neath Port Talbot County Borough Council Neath Port Talbot County Borough Council Impounding 2.3 16381 54.66 19363 55.03
40 Barlwyd Isaf In Operation Near Blaenau Ffestiniog Gwynedd Council J W Greaves & Son Limited Impounding 1888 12.1 123000 458 40000 459.8
41 Tan-y-Grisiau In Operation Near Blaenau Ffestiniog Gwynedd Council First Hydro Company Impounding 1961 15 2124000 400639
42 Roath Park Lake In Operation Cardiff Cardiff Council Cardiff Council Impounding 1895 6.48 108000 20.12 120000 22.03
43 Skim Ponds In Operation Near Milford Haven Pembrokeshire County Council Puma Energy (UK) Limited Non Impounding 1974 7.5 88500 65.35 55000 65.85
44 Llyn Canol In Operation Llanarthne Carmarthenshire County Council National Botanic Garden of Wales Impounding 1996 4.9 13329 57.05 10810 58.25
45 Peterstone Fishing Lake In Operation Wentlooge, nr Cardiff Newport City Council Individual(s) Non Impounding 1991 2 70000 40000
46 Marchweil In Operation Near Wrexham Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Non Impounding 1982 7.5 110000 84 22300 85
47 Cefn Mably No. 2 In Operation Pontprennau Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1965
48 Cwm Oernant Lower In Operation Carmarthen Carmarthenshire County Council Carmarthenshire County Council Impounding 1890 4.7 11040 39.5 5520 40.5
49 Llyn Glan-y-Gors In Operation Gwydyr Forest, Trefriw, Conwy Conwy County Borough Council Individual(s) Impounding 1875 Southern Dam: 1.9, Western Dam: 1.83 51969 274.574 28909 Southern Dam: 274.9, Western Dam: 275.03
50 Vyrnwy In Operation Near Welshpool Powys County Council Hafren Dyfrdwy Cyfyngedig Impounding 1892 25.62 59666000 251.86 4536000 256.13
51 Rhymney Bridge No.1 In Operation Near Rhymney Caerphilly County Borough Council Dwr Cymru Cyfyngedig Impounding 1860 12 57845 14000
52 Ystradfellte In Operation Near Aberdare Powys County Council Dwr Cymru Cyfyngedig Impounding 1914 33 3200000 239000
53 Morwynion In Operation Near Ffestiniog Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1879 6.1 621970 392.3 113000 393.99
54 Llyn Ffynnon-y-Gwas In Operation Near Caernarfon Gwynedd Council Individual(s) Impounding 2.69 79701 548.1 55445 550
55 Bicton 2 'Middle' In Operation St Ishmaels Pembrokeshire County Council Bicton Farms Ltd Impounding 4.86 27252 47.405 11399 47.4
56 Greenhill In Operation Hundleton, Pembroke Dock Pembrokeshire County Council Dwr Cymru Cyfyngedig Non Impounding
57 Llyn Bodgynydd In Operation Near Llanwrst Conwy County Borough Council Llanrwst Anglers Club Impounding 1996 4.5 69000 79000
58 Townhill In Operation Townhill, Swansea City and County of Swansea Dwr Cymru Cyfyngedig Non Impounding 1912 5.9 11100 178.98 3075 122
59 Llandrindod Lake In Operation Llandrindod Wells Powys County Council Powys County Council Impounding 1890 3 63500 224.5 63500 225
60 Nant-y-Ffrith In Operation Near Four Crosses Denbighshire County Council Hafren Dyfrdwy Cyfyngedig Impounding 1871 8.5 103000 317.001 52000 318.03
61 Pant-y-Llyn In Operation Builth Wells Powys County Council Individual(s) Impounding NW Dam: Gravity, North Dam: Gravity NW Dam: 2.489, North Dam: 2.11 33717 410.1 26464 NW Dam: 411.1, North Dam: 411.1
62 Carno Upper In Operation Near Ebbw Vale Powys County Council Dwr Cymru Cyfyngedig Impounding 1875 14 309091 444.588 63600 446.01
63 St Lythans In Operation Twyn yr Odyn, Vale of Glamorgan Vale of Glamorgan Council Dwr Cymru Cyfyngedig Non Impounding 1945 4.5 13500 126 3415 128
64 Hensol In Operation Near Cardiff Vale of Glamorgan Council J H Leeke & Sons Limited Impounding 1900 6 86000 43.84 92000 45.5
65 Llyn y Foel In Operation Conwy Conwy County Borough Council Allied Hydro Power Impounding 1880 4 190000 535 38000 538
66 Llyn Clywedog In Operation Near Llanidloes Powys County Council Hafren Dyfrdwy Cyfyngedig Impounding 1967 Clywedog: 72, Bwlch-y-Gle: 9 50000000 282.55 2490000 Clywedog: 282.55, Bwlch-y-Gle: 284.99
67 Alaw In Operation Near Llanddeusant Anglesey County Council Dwr Cymru Cyfyngedig Impounding 1966 Primary dam: 7, Secondary dam: 3, Tertiary Dam: 6.79 7638000 39.73 3666000 Primary dam: 41.61, Secondary dam: , Tertiary Dam:
68 Upper Quarry Pit In Operation Conwy Conwy County Borough Council Allied Hydro Power Impounding 1880 20 34000 470 1700 480
69 Hendrescythan In Operation Creigau Rhondda Cynon Taff County Borough Council Individual(s) Impounding 5.727 25400 78.81 14110 79.122
70 Plas Uchaf In Operation Near Llannefydd Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1870 15 225500 144.81 36000 147.06
71 Crickmarren In Operation Hundleton Pembrokeshire County Council Individual(s) Impounding 1843 4 18000 15000
72 Mill Pond In Operation Pembroke Pembrokeshire County Council Pembrokeshire County Council Impounding 1820 5 55000 2.91 49900 5.2
73 Gnoll Park Fish Pond In Operation Neath Neath Port Talbot County Borough Council Neath Port Talbot County Borough Council Impounding 1702 5.8 28446 61.1 23181 63.1
74 Carno Lower In Operation Near Ebbw Vale Blaenau Gwent County Borough Council Dwr Cymru Cyfyngedig Impounding 1911 27 800000 392.7 88000 394.5
75 Llyn Heilyn In Operation Llanfihangel Nant Melan Powys County Council Individual(s) Impounding Not Known 1.67 12414 24780
76 Bron Eifion Fishing Lake In Operation Criccieth Gwynedd Council Individual(s) Impounding Not Known 2.766 19691 16000 66.12
77 Llandegfedd (0116) In Operation Pontypool Monmouthshire County Council Dwr Cymru Cyfyngedig Impounding 1963 36.9 24466000 85.344 1760445 87.2
78 Cwmavon In Operation Near Cwmavon Torfaen County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1894 10 43750 8200
79 Grwyne Fawr In Operation Near Abergavenny Powys County Council Dwr Cymru Cyfyngedig Impounding 1928 48 1480450 545 105000 547.22
80 Cyfty In Operation Betws y Coed Gwynedd Council Natural Resources Wales (WGWE) Impounding 1850 6 13600 10550
81 Gelli Gain In Operation Near Bron Aber Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1.6 24500 395.6
82 Llwyn-On In Operation Near Merthyr Tydfil Merthyr Tydfil County Borough Council Dwr Cymru Cyfyngedig Impounding 1926 24 5504550 260.3 583000 262.13
83 Cwmystradllyn In Operation Near Porthmadog Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1961 10.7 2950000 205.27 400000 207.4
84 Pant Glas In Operation Penycae, Rhosllanerchcrugog Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Impounding 1940 9.65 18160 280.72 6588 281.95
85 Cwm Oernant Upper In Operation Carmarthen Carmarthenshire County Council Carmarthenshire County Council Impounding 1890 8.3 10480 46.8 5240 47.9
86 West Reservoir Pembroke Refinery In Operation Near Pembroke Pembrokeshire County Council Valero Energy Limited Impounding 1964 8.24 58000 14970
87 Van Pool In Operation Y Fan, Llanidloes Powys County Council Individual(s) Impounding 1865 2 24333 34426
88 Cefn Golau Pond In Operation Tredegar Blaenau Gwent County Borough Council WBCP (Bedwellty) Ltd. Impounding 1939 1.4 15889 377.8 14225
89 Ynys-y-Fro Lower In Operation Near Newport Newport City Council Dwr Cymru Cyfyngedig Impounding 1848 15 294000 37.48 60705 39.64
90 Castle Pond In Operation Pembroke Pembrokeshire County Council Pembrokeshire County Council Impounding 1972 6 48000 40000
91 Llyn Cae Conroy Isaf In Operation Pennant, Llanbrynmair Powys County Council Individual(s) Impounding 1830 7.6 22160 201.5 7812 204.6
92 Coed Dolwyd In Operation Llandudno Junction Conwy County Borough Council Dwr Cymru Cyfyngedig Non Impounding 2013 5.2 21960 129.2 5670 129.2
93 Crai In Operation Near Brecon Powys County Council Dwr Cymru Cyfyngedig Impounding 1907 30.5 4580000 11000
94 Garreg Ddu In Operation Near Rhayader Powys County Council Dwr Cymru Cyfyngedig Impounding 1904 17 3018000 200000 238.35
95 Llyn Ffridd y Bwlch In Operation Blaenau Ffestiniog Gwynedd Council Cymdeithas Enweiriol y Cambrian Impounding Not Known 5 16500 11660 317.18
96 Llyn Plas-y-Mynydd In Operation Near Machynlleth Ceredigion County Council Individual(s) Impounding 1850 5 90000 75000
97 Nant-y-Fendrod In Operation Near Swansea City and County of Swansea City and County of Swansea Impounding 1985 5.49 142000 77000
98 Brithdir Mawr In Operation Near Mold Flintshire County Council Dwr Cymru Cyfyngedig Impounding 1897 10 36370 254.74 7082 256
99 Glascoed In Operation Bodelwyddan, Rhyl Denbighshire County Council Dwr Cymru Cyfyngedig Non Impounding 1971 6.4 18400 120 3000 122
100 Llyn Nant-y-Cagal In Operation Near Machynlleth Ceredigion County Council Individual(s) Impounding 8 60000 394 38000
101 Pen-y-Garreg In Operation Near Rhayader Powys County Council Dwr Cymru Cyfyngedig Impounding 1904 35.5 6046000 288 500000 289.7
102 Pant Farm Lake In Operation Llanddewi Brefi Ceredigion County Council DG Jones (Properties) Ltd Impounding 1968 2 23000 45400
103 Gyrn Castle Fish Pond In Operation Llanasa, Nr Prestatyn Denbighshire County Council Individual(s) Impounding 5.529 26814 108.897 10353
104 Dyffryn Conwy FSR (FRM) In Operation Trefriw Conwy County Borough Council Natural Resources Wales (FRM) Impounding 2009 5.68 1130000 5.65 970000 7.8
105 Almere Flood Storage Area In Operation Rossett, Wrexham Flintshire County Council Natural Resources Wales (FRM) Impounding 2006 4 25000 25000 9
106 Pond Feeder In Operation Fochrhiw Caerphilly County Borough Council Caerphilly County Borough Council Impounding Not Known 5.781 22730 386.345 16100
107 Bro Tywi In Operation Croesyceiliog Carmarthenshire County Council Individual(s) Impounding 1989 3.5 21000 36.4 14000 37.4
108 Cwmwernderi In Operation Near Port Talbot Neath Port Talbot County Borough Council Dwr Cymru Cyfyngedig Impounding 1901 23 159000 148.87 28329 152.87
109 Eglwys Nunydd In Operation Near Margam Neath Port Talbot County Borough Council Tata Steel Europe Limited Non Impounding 1962 5.2 3840000 1052220
110 Burton Tower Pond In Operation Wrexham Wrexham County Borough Council Individual(s) Impounding 1870 3.2 24996 50.51 15795
111 Llyn Syfydrin In Operation Near Ponterwyd Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1800 6 115000 325 106000
112 Cantref In Operation Near Merthyr Tydfil Powys County Council Dwr Cymru Cyfyngedig Impounding 1892 26 1490910 327.05 174000 329.18
113 Cefni In Operation Near Llangefni Anglesey County Council Dwr Cymru Cyfyngedig Impounding 1950 7.9 1548000 29.87 690000 31.49
114 Cilcain No.4 In Operation Near Cilcain Flintshire County Council Dwr Cymru Cyfyngedig Impounding 1908 11.9 98000 281.93 24000 283.3
115 Dolwyddelan In Operation Dolwyddelan Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1914 3.04 22730
116 Catsash No.1 In Operation Langstone, Newport Newport City Council Dwr Cymru Cyfyngedig Non Impounding 1970 5.67 13600 121.2 2500 122.43
117 Pontsticill In Operation Near Merthyr Tydfil Merthyr Tydfil County Borough Council Dwr Cymru Cyfyngedig Impounding 1927 34 15640000 1412000
118 Cwm Hedd In Operation Newport Newport City Council LT Williams & Sons Impounding Not Known 4.384 33292.97 57.074 25314
119 Glan Conwy Nature Reserve In Operation Llandudno Junction Conwy County Borough Council RSPB Non Impounding 1991 3 220000 6.06 135000 8
120 Coed Darcy South Site In Operation Llandarcy Neath Port Talbot County Borough Council St Modwen Properties PLC Impounding 1960 5 21120 18.56 18000 21.71
121 Llyn Newydd In Operation Near Blaenau Ffestiniog Gwynedd Council J W Greaves & Son Limited Impounding 1860 7 105053 480 51000 481.05
122 Ffynnone In Operation Newchapel Pembrokeshire County Council Calon yn Tyfu Cyfyngedig Impounding 1920 5 11250 9000
123 Bicton 1 'Upper' In Operation St Ishmaels Pembrokeshire County Council Bicton Farms Ltd Impounding 3.585 17082 49.031 12914 49.8
124 Pant Pool In Operation Welshpool Powys County Council Individual(s) Impounding 5.401 41501 165.4 22801
125 Ynysygwas In Operation Cwmafan Neath Port Talbot County Borough Council Forest Lodge Lane Developments Ltd Impounding 1877 15 26771 92.559 7047
126 Penbrigog In Operation Llys Berllan, Buckley Wrexham County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1977 5.6 22720 157 4510 159
127 Lisvane (0192) In Operation Cardiff Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1864 10.3 363636 44.63 78000 45.83
128 Radyr Llanilid In Operation Danescourt, Cardiff Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1958 6.3 18000 66 3000 68
129 Rosebush In Operation Near Haverfordwest Pembrokeshire County Council Dwr Cymru Cyfyngedig Impounding 1931 17.5 650000 221.21 130000 222.91
130 Purge Pond B Connah's Quay In Operation Connah's Quay Flintshire County Council Uniper UK Ltd Non Impounding 1995 13013 1730
131 Pen-y-Mynydd In Operation Pen y Mynydd, Anglesey Anglesey County Council Dwr Cymru Cyfyngedig Non Impounding 1970 6.3 10512 98.65 1800 100.65
132 Llyn Maen Bras (008) In Operation Near Bala Gwynedd Council Rhiwlas Hydroelectric Limited Impounding 1870 4.3 51000 348.84 40000 349.1
133 Newport Wetlands Field Block 3 In Operation Newport Newport City Council Natural Resources Wales (Land) Impounding 1990 0.739 26924 127300
134 Llyn-y-Parc In Operation Gwydyr Forest North, Llanrwst Conwy County Borough Council Natural Resources Wales (WGWE) Impounding 1890 2.8 49445 202.16 71700
135 Llanishen (00026) In Operation Cardiff Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1886 11 1441000 46.015 240400 47.18
136 Bryngwyn Pool In Operation Llanfyllin Powys County Council Individual(s) Impounding 1900 3.36 35323 124.326 24463 124.65
137 Aston No.2 In Operation Old Aston Hill, Deeside Flintshire County Council Dwr Cymru Cyfyngedig Non Impounding 1990 3.92 22720 83.6 4232 85.42
138 Upper Trebeddrod In Operation Llanelli Carmarthenshire County Council Carmarthenshire County Council Impounding 1854 12.5 29000 58.38 9400
139 Tredegar House Lake In Operation Near Newport Newport City Council The National Trust Impounding 1790 South and West Embankment: 2.5, Eastern Embankment: 2 30500 11.13 40100 South and West Embankment: 12.034, Eastern Embankment: 11.815
140 Purge Pond A Connah's Quay In Operation Connah's Quay Flintshire County Council Uniper UK Ltd Non Impounding 1995 13013 1730
141 Nant-y-Draenog In Operation Cwmfelinfach, Ynysddu Caerphilly County Borough Council Eurolago e Foresta Limited Impounding 1897 14 54552 10640
142 Llyn Newydd Rhos Quarry In Operation Conwy Conwy County Borough Council Allied Hydro Power Impounding 4 50000 347 23900 348
143 Ffynnon Llugwy In Operation Near Capel Curig Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1919 8 1754000 545.87 162000 551.8
144 Llyn-y-Garnedd In Operation Maentwrog Gwynedd Council Instant Timber Limited Impounding Llyn y Garnedd - Eastern Dam: Not Known, Llyn y Garnedd - Southern Dam: Rockfill Llyn y Garnedd - Eastern Dam: 2, Llyn y Garnedd - Southern Dam: 1.6 22000 220.52 22000 Llyn y Garnedd - Eastern Dam: 221.406, Llyn y Garnedd - Southern Dam: 221.479
145 Rhosgoch In Operation Penrhyncoch, Aberystwyth Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1850 2 22000 347.563 26000 345
146 Llieidi Lower In Operation Near Llanelli Carmarthenshire County Council Dwr Cymru Cyfyngedig Impounding 1878 18 700000 135000
147 Llyn Bwlch In Operation Cerrigydrudion Conwy County Borough Council Individual(s) Impounding 1920 3 15000 349 16000 350
148 Big Pool Llanerchydol In Operation Welshpool Powys County Council Individual(s) Impounding 2.1 17999 137.254 13567
149 Middle Pond In Operation Merthyr Tydfil Merthyr Tydfil County Borough Council Merthyr Tydfil County Borough Council Impounding 1856 3 17000 357.31 15220 357.82
150 Llyn Goddionduon In Operation Capel Curig Conwy County Borough Council Natural Resources Wales (WGWE) Impounding 1900 1.5 60000 242.71 56699 243.75
151 Fresh Water & Well Water In Operation Near Shotton Flintshire County Council Tata Steel UK Limited Non Impounding 1950 4.6 61600 8.84 18635 9.45
152 Lliw Upper In Operation Near Swansea City and County of Swansea Dwr Cymru Cyfyngedig Impounding 1896 23 1318000 154000
153 Taff Bargoed Lake In Operation Trelewis Merthyr Tydfil County Borough Council Merthyr Tydfil County Borough Council Impounding 2000 2.33 24771 145.42 19279 146.08
154 Llyn Ieuan Dwyrain In Operation Ponterwyd Ceredigion County Council Natural Resources Wales (WGWE) Impounding 1850 3.11 15393.18 514.73 18621 515.16
155 Coldbrook FAS In Operation Barry Vale of Glamorgan Council Vale of Glamorgan Council Impounding 2017 3 19812 33.85 10472 34
156 Llyn Pendam In Operation Near Ponterwyd Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1850 8.5 70000 32500
157 Dinas In Operation Near Ponterwyd Ceredigion County Council Statkraft Energy Limited Impounding 1965 30 1091061 254.51 243000 256.95
158 Gwgia In Operation Near Newtown` Powys County Council The Gregynog Trust Impounding 1903 8 108600 274.87 64000 276.7
159 Clywedog In Operation Near Cyffylliog Denbighshire County Council Vale of Clwyd Angling Club Impounding 1937 8.84 34600 411.18 12950 412.86
160 Settling Tank Connah's Quay In Operation Connah's Quay Flintshire County Council Uniper UK Ltd Non Impounding 1995 31055 12 4683.5
161 Frongoch In Operation Near Devil's Bridge Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1850 7.8 145000 285 72300
162 Tyn-y-Mynydd In Operation Betws y Coed Conwy County Borough Council Natural Resources Wales (WGWE) | Individual(s) Impounding 1850 1.5 46467 240.45 42187 240.98
163 Cribbarth No.1 In Operation Risca, Newport Newport City Council Dwr Cymru Cyfyngedig Non Impounding 1960 7.66 13910 213.36 2484 213.36
164 Dinorwig Surge Pond In Operation Near Caernarfon Gwynedd Council First Hydro Company Non Impounding 1981 14 36500 646 4000 649
165 Llyn Rhos Ddu In Operation Anglesey Isle of Anglesey County Council Natural Resources Wales (Land) Impounding 1994 0.35 10022 7.54 32800
166 Windmill Hill In Operation Bonymaen, Swansea City and County of Swansea Dwr Cymru Cyfyngedig Non Impounding 1966 5.5 16888 123.28 3300 125.28
167 Ladyhill In Operation Near Newport Newport City Council Dwr Cymru Cyfyngedig Non Impounding 1954 4.6 25000 5099
168 Llyn Llywelyn In Operation Beddgelert Forest Gwynedd Council Natural Resources Wales (WGWE) Impounding 1850 0.9 14200 243.01 24800
169 Llyn Chwarel In Operation Conwy Conwy County Borough Council Allied Hydro Power Impounding 1920 4 30000 372 14200 373
170 Cwm Celyn In Operation Blaina Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding Not Known 4.5 12480 330.12 9892 331
171 Llyn Rhosrhydd In Operation Devil's Bridge Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1850 6.1 105000 60700
172 Bugeilyn In Operation Near Machynlleth Powys County Council Statkraft Energy Limited Impounding 1965 7 335000 455.37 14800 456.59
173 Llyn Arenig Fach In Operation Near Bala Gwynedd Council Individual(s) Impounding 1870 2 292000 454 132000
174 Upper Winsle (00427 Lower Reservoir) In Operation St Ishmaels Pembrokeshire County Council Individual(s) Impounding 4.08 22461 27.141 11200 28.138
175 Barlwyd Uchaf In Operation Blaenau Ffestiniog Gwynedd Council J W Greaves & Son Limited Impounding 1883 5.1 16000 186 15000 190
176 Llyn Frogwy In Operation Bodffordd Anglesey County Council Individual(s) Impounding 1350 6.3 26000 40.75 15800 42.22
177 Llyn Cyfynwy In Operation Near Rhydtalog Denbighshire County Council Hafren Dyfrdwy Cyfyngedig Impounding 1892 North Dam: 2.6, South Dam: 2.5 140000 370.64 72800 North Dam: 371.55, South Dam:
178 Cairn Mound (0098) In Operation Near Brynmawr Blaenau Gwent County Borough Council Dwr Cymru Cyfyngedig Impounding 1960 11 94720 443.77 31600 445.54
179 Coed-y-Parc In Operation Bethesda Gwynedd Council Coetir Mynydd Impounding 1847 8.6 12187 167.783 5203 167.783
180 Bicton 3 'Lower' In Operation St Ishmaels Pembrokeshire County Council Bicton Farms Ltd Impounding 5.531 25560 34.457 10602 35.2
181 River Gele FSA (FRM) In Operation Kinmel Bay Conwy County Borough Council Natural Resources Wales (FRM) Impounding 1960 1.1 200491 250614
182 Mountain Reservoir In Operation Penmaenmawr Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 3 19602 136.93
183 Penpedairheol Flood Storage Reservoir In Operation Near Ystrad Mynach Caerphilly County Borough Council Caerphilly County Borough Council Impounding 1999 8 72000 207.5 31000 206.4
184 Llyn y Tarw In Operation Tregynon Powys County Council Individual(s) Impounding Not Known 3.784 58500 65774
185 Llyn Peris In Operation Near Caernarfon Gwynedd Council First Hydro Company Impounding 1981 4 3000000 106.25 590000 107.3
186 Ynys-y-Fro Upper In Operation Near Newport Newport City Council Dwr Cymru Cyfyngedig Impounding 1881 8 86250 44.19 32376 46.8
187 Pantyrhuad In Operation Llanddowror, St Clears Carmarthenshire County Council Individual(s) Impounding 7.25 19500 10000
188 Bosherston Lake In Operation Near Bosherston Pembrokeshire County Council The National Trust Impounding 1860 1 433000 334000
189 Beaufort Lower Boat Pond In Operation Beaufort Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding 4.5 24850 386.971 31500
190 West Orielton In Operation Near Pembroke Pembrokeshire County Council David Mason Farms Impounding 1820 4 136000 38.64 42000 40.15
191 Llyn-y-Dywarchen In Operation Near Rhyd-Ddu Gwynedd Council Snowdonia National Park Authority Impounding 1850 Main dam: 4, Subsudiary Dam: 1.5, Llwyn-y-Forwyn: 100000 236.22 100000 Main dam: 237.42, Subsudiary Dam: 236.52, Llwyn-y-Forwyn: 237.22
192 Caban Coch In Operation Near Rhayader Powys County Council Dwr Cymru Cyfyngedig Impounding 1904 44 35531000 2023000
193 Garn Lakes Upper In Operation Blaenavon Torfaen County Borough Council Torfaen County Borough Council Impounding Not Known 12.595 20000
194 Llyn Ieuan 2 (Ganol) In Operation Eisteddfa Gurig Ceredigion County Council Natural Resources Wales (WGWE) Impounding 1850 1.8 41121 525.19 32657 526.5
195 Cefn Hirgoed No. 1 (327) In Operation Pencoed Bridgend County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1996 6.2 3800
196 Pen-y-Fan Pond In Operation Near Croespenmaen Caerphilly County Borough Council Caerphilly County Borough Council Impounding 1794 8 207600 300.92 90000 302.8
197 Bettws Lane In Operation Newport Newport City Council Newport City Council Non Impounding Not Known 1 30000 11.2 11.2
198 Coity Pond In Operation Blaenavon Torfaen County Borough Council Walters Resources Limited Impounding Not Known 6.093 24000 22280
199 Llwyn Du In Operation Monmouth Monmouthshire County Council Dwr Cymru Cyfyngedig Non Impounding 1913 150.876 6000 152.4
200 Llyn Bodgylched In Operation Beaumaris Anglesey County Council Individual(s) Impounding 1.375 74884 100.995 102242 101.3
201 Cynwyd In Operation Cynwyd, nr Corwen, Denbighshire Denbighshire County Council Dopower Limited Impounding 1923 8.8 24995 264.87 14000 270
202 Cilcain No.2 In Operation Cilcain, Near Mold Flintshire County Council Dwr Cymru Cyfyngedig Impounding 1896 8 15000
203 Sluvad No.2 In Operation Pontypool Torfaen County Borough Council Dwr Cymru Cyfyngedig Non Impounding Not Known 4.2 13600 142 3100 144
204 Llyn Uchaf & Pwll yr Ardd In Operation Llanarthne Carmarthenshire County Council National Botanic Garden of Wales Impounding 1996 5.8 12483 61.7 13150 62.8
205 Uskmouth Lagoons 4 - 9 In Operation Newport Newport City Council Natural Resources Wales (Land) Non Impounding 1999 5.1 350000 10.4 320900 10.8
206 St y Nyll Upper In Operation St Brides-super-Ely Vale of Glamorgan Council Individual(s) Impounding 5.731 13434 54.591 12621 55.4
207 Glanrhyd In Operation Pentir Gwynedd Council Glan Gwna Estates Ltd Non Impounding Not Known 2.14 23523 10491
208 Cwmtillery In Operation Near Abertillery Blaenau Gwent County Borough Council Dwr Cymru Cyfyngedig Impounding 1900 15 148000 342.23 40500 344.8
209 Llyn-y-Gwaith In Operation Near Lampeter Ceredigion County Council Woodland Investment Management Limited Impounding 1886 4 60000 424 52000
210 Peterstone Gout In Operation Wentlooge Newport City Council Natural Resources Wales (FRM) Impounding 1960 6 79073 4.7 19400
211 Afon Wydden Upper FSA (FRM) In Operation Llandudno Conwy County Borough Council Natural Resources Wales (FRM) Impounding 1995 5 29000 12 20700
212 Llyn Fawr In Operation Near Rhondda Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Impounding 1914 21 917000 367.9 101175
213 Llyn Ogwen In Operation Near Bethesda Gwynedd Council Penrhyn & Cochwillan Estates Impounding 0.4 189100 302.2 378000 302.2
214 Waun-y-Pound Middle Lake In Operation Ebbw Vale Blaenau Gwent County Borough Council Fragile Limited Impounding 1929 4.5 22146 369.607 11500 371.719
215 Canada Lake In Operation Creigiau Cardiff Council Canada Lodge Management Limited Impounding 1866 6.713 61222 55.369 19509 55.8
216 Penderyn In Operation Near Aberdare Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Impounding 1865 15 594000 213.36 93081
217 Caerphilly Castle Inner Moat In Operation Caerphilly Caerphilly County Borough Council Cadw Impounding 1961 4 75000 86.2 53000 88.3
218 Aled In Operation Pentrefoelas / Llansannan Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1934 5.3 1725000 372.78 445000 374.05
219 Garth Lake In Operation Near Builth Wells Powys County Council Individual(s) Impounding 1850 4 47500 165 28000 165.3
220 Duffryn No.1 In Operation Bassaleg, Nr Newport Newport City Council Dwr Cymru Cyfyngedig Non Impounding 1975 5.49 17000 76 2644 76.67
221 Wentwood In Operation Near Newport Newport City Council Dwr Cymru Cyfyngedig Impounding 1904 27 1845000 169974
222 East Catch Basin (Release Point C) In Operation Waterston, Hazelbeach, Milford Haven Pembrokeshire County Council Valero Pembrokeshire Oil Terminal Ltd Impounding 1968 18 14073 26.52 4000 27.18
223 Waun Pond (0002) In Operation Ebbw Vale Blaenau Gwent County Borough Council Individual(s) | Blaenau Gwent County Borough Council Impounding 1925 6 100000 37900
224 Crafnant Loop FSA (0036) In Operation Trefriw Conwy County Borough Council Natural Resources Wales (FRM) Impounding 2008 4 90000 45900
225 Wenallt In Operation Cardiff Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1928 7 68190 11100
226 Llyn Glandwgan In Operation Near Devil's Bridge Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1825 6 115000 72800
227 Cockett In Operation Sketty, Swansea City and County of Swansea Dwr Cymru Cyfyngedig Non Impounding 1955 5.7 13025 175 2562 177
228 Llyn-y-Mynydd In Operation Near Llangynog Powys County Council Individual(s) Impounding 70000 38000
229 Neuadd Upper In Operation Near Merthyr Tydfil Powys County Council Dwr Cymru Cyfyngedig Impounding 1902 26 268000 457.97 220000
230 Beaufort Upper Boat Pond In Operation Beaufort Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding 5 24900 391.731 16640
231 Stumpy In Operation Barry Vale of Glamorgan Council Dwr Cymru Cyfyngedig Non Impounding 1955 5 15552 79 3888 80
232 Moss House Wood In Operation Near Tonna Neath Port Talbot County Borough Council Neath Port Talbot County Borough Council Impounding 1889 22 90900 115.83 9678 116.79
233 Dol-y-Mynach In Operation Near Rhayader Powys County Council Dwr Cymru Cyfyngedig Impounding 1904 10.7 730000 36423
234 Alwen In Operation Near Denbigh Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1918 30 14564200 362.71 1490000 365
235 Marsh's Pool In Operation Near Llangurig Powys County Council Glanrhyd & Penllyn Trust Impounding 4 55454
236 Sluvad No.1 In Operation Pontypool Torfaen County Borough Council Dwr Cymru Cyfyngedig Non Impounding Not Known 4.2 13600 142 3100 144
237 Court Farm In Operation Near Caerleon Monmouthshire County Council Dwr Cymru Cyfyngedig Non Impounding 1986 16 264000 40000
238 Ref 6 In Operation Amlwch Anglesey County Council Parys Mountain Mines Ltd Impounding Not Known 2 15184 20245
239 Bryngwyn New In Operation Llandeilo Carmarthenshire County Council Dwr Cymru Cyfyngedig Non Impounding 1991 258 3600 260
240 Llyn yr Wyth Eidion In Operation Llangefni Anglesey County Council Natural Resources Wales (Land) Impounding 1994 1.2 36000 60000
241 Schwyll No.1 In Operation Ogmore Village Vale of Glamorgan Council Dwr Cymru Cyfyngedig Non Impounding 1963 19.2 13640 17.8
242 Bolton Hill Upper In Operation Haverfordwest Pembrokeshire County Council Dwr Cymru Cyfyngedig Non Impounding Not Known 6 16272 3600
243 Uskmouth Lagoon 10 In Operation Newport Newport City Council Natural Resources Wales (Land) Non Impounding 1990 6 50000 119028
244 Canaston Bridge In Operation Haverfordwest Pembrokeshire County Council Dwr Cymru Cyfyngedig Non Impounding 1980 5 12000 8.5 6850 9.5
245 Tyn-y-Waun In Operation Treherbert Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Non Impounding Not Known 24230 5871
246 Brymbo Pool Pond In Operation Brymbo, nr Wrexham Wrexham County Borough Council Brymbo Developments Limited, Parkhill Group of Companies Impounding 1958 22300 251.28 11400
247 Beacons In Operation Near Merthyr Tydfil Powys County Council Dwr Cymru Cyfyngedig Impounding 1897 18 1577300 206000
248 Warren Mill In Operation Vale of Glamorgan Council Individual(s) Impounding 1650 5 16162 16519
249 Llyn Pen-y-Gwryd In Operation Near Capel Curig Gwynedd Council Individual(s) Impounding 1928 2.5 20655 25037
250 Felindre In Operation Near Swansea City and County of Swansea Dwr Cymru Cyfyngedig Non Impounding 1972 8 143200 129.54 26000 129.54
251 Stwlan In Operation Near Blaenau Ffestiniog Gwynedd Council First Hydro Company Impounding 1962 34 1700000 502.92 118370 503.97
252 Cwm Rheidol In Operation Near Aberystwyth Ceredigion County Council Statkraft Energy Limited Impounding 1965 12 675000 47.24 231000 49.07
253 Llieidi Upper In Operation Near Llanelli Carmarthenshire County Council Dwr Cymru Cyfyngedig Impounding 1905 16 827000 125000
254 Llyn Gweryd In Operation Near Mold Denbighshire County Council Individual(s) Impounding 1870 5 50000 320.56 50000 321.53
255 Pont y Cerbyd FSA (FRM) In Operation Solva Pembrokeshire County Council Natural Resources Wales (FRM) Impounding 1990 1.67 30500 35000
256 Carew Mill Pond In Operation Near Tenby Pembrokeshire County Council Pembrokeshire Coast National Park Authority Impounding 1801 5 86000 93000
257 Llyn Brianne In Operation Near Llandovery Ceredigion County Council Dwr Cymru Cyfyngedig Impounding 1972 90 64400000 220000
258 Cyfarthfa Park Lake In Operation Near Merthyr Tydfil Merthyr Tydfil County Borough Council Merthyr Tydfil County Borough Council Impounding 1875 2 26000 24000
259 Rhymney Bridge No.2 In Operation Near Merthyr Tydfil Caerphilly County Borough Council Dwr Cymru Cyfyngedig Impounding 1901 18.49 193209 355.75 29000 358.49
260 Llygad Rheidol In Operation Near Aberystwyth Ceredigion County Council Dwr Cymru Cyfyngedig Impounding 1880 10 295000 509.04 597000
261 Dingestow Court Lake In Operation Monmouthshire Monmouthshire County Council Individual(s) Impounding 1979 3.79 27000 37.17 14375
262 Butetown In Operation Near Rhymney Caerphilly County Borough Council Caerphilly County Borough Council Impounding 1850 9 213662 324.67 60694 325.93
263 Graigllwyd Springs In Operation Penmaenmawr, Conwy Conwy County Borough Council Individual(s) Non Impounding 1927 8.2 18184 136.85 5383 137.5
264 Nant-y-Geifr In Operation Llanidloes Powys County Council Hafren Dyfrdwy Cyfyngedig Impounding 1899 9.75 15148 289.56 6492 291.08
265 Fairwood Lake In Operation Swansea City and County of Swansea Swansea City Association Football Club Limited Impounding 1850 3 25000 21000
266 Rhaslas Pond In Operation Near Merthyr Tydfil Caerphilly County Borough Council Merthyr (South Wales) Limited Impounding 1869 North Embankment: 4, South Embankment: 4 210000 404.75 102000 North Embankment: 406, South Embankment:
267 Waun-y-Pound Upper (0199) In Operation Near Ebbw Vale Blaenau Gwent County Borough Council Fragile Limited Impounding 1929 9.23 82591 378.62 25208 381.1
268 Tongwynlais No.1 In Operation Tongwynlais Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1965 6.1 18000 111.3 4500 111.8
269 Llyn Cae Conroy Upper In Operation Llanbrynmair Powys County Council Individual(s) Impounding 1852 15.44 46595 218.92 12850 221.44
270 Moss Valley Fishing Lake In Operation Brynteg, Wrexham Wrexham County Borough Council Wrexham County Borough Council Impounding 1973 1.45 14200 9900
271 Pysgodlyn Mawr In Operation Llanddunwud / Welsh St Donat's Vale of Glamorgan Council Natural Resources Wales (WGWE) Impounding 1870 1.7 17630 112.66 11919
272 Cwellyn In Operation Near Waunfawr Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1979 4.1 1687000 141.15 870000 143.1
273 Trawsfynydd In Operation Near Trawsfyndd Gwynedd Council Magnox Limited Impounding 1991 Maentwrog New Dam: 40.4, Trawsfynydd East & West Saddle: 6.4, Hendre Mur Saddle: 5.5, Gyfynys Saddle: 11 33190000 198.25 5380000 Maentwrog New Dam: 201.42, Trawsfynydd East & West Saddle: 199.34, Hendre Mur Saddle: 199.34, Gyfynys Saddle: 199.34
274 New Pool In Operation Ceri / Kerry Powys County Council Natural Resources Wales (WGWE) Impounding 1850 14 44500 8934
275 Llyn nr Llanhari Tre-Fran In Operation Llanhari Rhondda Cynon Taff County Borough Council Persimmon Homes West Wales Non Impounding 1980 5.672 16020 56.128 15350 58.672
276 Llyn Tegid (FRM) In Operation Bala Gwynedd Council Natural Resources Wales (FRM) Impounding 1956 4 21878121 162.87 400000
277 Oakenholt (0197) In Operation Near Flint Flintshire County Council Essity Operations Manchester Ltd. Impounding 1876 15 83500 31.39 19600 33
278 Flour Mill In Operation Near Holywell Flintshire County Council Flintshire County Council Impounding 1790 4 26000 34.92 14000 35
279 Keeper's (Pen-Ffordd-Goch) Pond In Operation B4246 Blaenavon Monmouthshire County Council Brecon Beacons National Park Authority Impounding 1800 4 21850 14400
280 Llyn Bowydd In Operation Near Blaenau Ffestiniog Gwynedd Council J W Greaves & Son Limited Impounding 1860 4 68000 124726 81000
281 Nantddeiliog In Operation Near Dylife Powys County Council Individual(s) Impounding 29600 18500
282 Gwastad Mawr Flood Storage Area In Operation Newport Newport City Council Newport City Council Impounding 1930 10.2 600000 460000
283 Corwen In Operation Corwen Denbighshire County Council Dwr Cymru Cyfyngedig Impounding 1800 3 16000 295.79 297.42
284 Llyn Gludy In Operation Near Brecon Powys County Council Individual(s) Impounding 1850 4.8 66000 168 31500 168.8
285 Aled Isaf In Operation Near Denbigh Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1939 15 1137810 365.76 304000 367.59
286 Bryn Mulan (Ty Mawr) In Operation Prion, Denbigh Denbighshire County Council Individual(s) Impounding 1900 6 19244 6615
287 Firewater Pond In Operation Milford Haven Pembrokeshire County Council Dragon LNG Ltd Non Impounding 1967 4 10416 47.8 3472 48.8
288 Hendre Ddu Upper In Operation Dyfi Forest, Aberangell Gwynedd Council Natural Resources Wales (WGWE) Impounding 1897 12 25500 6500
289 Garn Lakes LNR Lower In Operation Blaenavon Torfaen County Borough Council Torfaen County Borough Council Impounding 1995 7.022 30976.78 17335
290 Ref 4 In Operation Amlwch Anglesey County Council Parys Mountain Mines Ltd Impounding Not Known 1 15005 15005
291 Llyn Geirionydd In Operation Near Llanrwst Conwy County Borough Council Trefriw Woollen Mills Limited Impounding 1944 0.65 150000 210 250000
292 Glaslyn In Operation Pen-y-Pass, Beddgelert Gwynedd Council RWE Generation UK PLC Impounding 1850 0.86 86788 598.95 83194 599.71
293 Blaen-y-Cwm In Operation Near Ebbw Vale Blaenau Gwent County Borough Council Dwr Cymru Cyfyngedig Impounding 1922 Main Embankment: 22.6, Clydach Dam: 1236000 417.545 210000 Main Embankment: 420.25, Clydach Dam: 418.49
294 Mochdre In Operation Newtown Powys County Council Individual(s) Impounding 23.19 17761 199.38 10299 201.2
295 Ysceifiog Lake In Operation Near Mold Flintshire County Council Individual(s) Impounding 1904 5 93400 122.27 60000 123.8
296 St James Park In Operation Tredegar Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding Not Known 9.43 22116 375 14000 377.76
297 Marchlyn Mawr In Operation Near Bangor Gwynedd Council First Hydro Company Impounding 2007 70.3 6700000 634 269000
298 Morriston In Operation Morriston, Swansea City and County of Swansea Dwr Cymru Cyfyngedig Non Impounding 1910 2.5 20626 104.24 3700 107
299 Parc Cwm Darran In Operation Fochriw Caerphilly County Borough Council Caerphilly County Borough Council Impounding 3.484 20000 271.863 24488
300 Pant-yr-Eos In Operation Near Newport Newport City Council Dwr Cymru Cyfyngedig Impounding 1878 29 597000 125 64752 126.98
301 Llyn-yr-Oerfa In Operation Devil's Bridge Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1850 9 82000 33000
302 Cowlyd In Operation Near Dolgarrog Conwy County Borough Council RWE Generation UK PLC Impounding 1920 15 9430000 366.27 1090000 367.66
303 Maesmawr In Operation Near Welshpool Powys County Council Individual(s) Impounding 1815 9 95000 220 53000
304 Penycae Lower In Operation Near Penycae Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Impounding 1872 10.2 39000 200.62 13000 202.62
305 Rosemoor In Operation Walwyn's Castle, Haverfordwest Pembrokeshire County Council Redrose Limited Impounding 1977 3.287 10000 20000
306 Festival Lake In Operation Ebbw Vale Blaenau Gwent County Borough Council Blaenau Gwent County Borough Council Impounding 1997 22.142 11546
307 Tredegar Park Golf Course Flood Attenuation Reservoir In Operation Newport Newport City Council Newport City Council Non Impounding 2015 3.5 85000 16.75 45000 17.6
308 Brenig In Operation Near Denbigh Conwy County Borough Council Dwr Cymru Cyfyngedig Impounding 1975 53.2 61500000 377 3725000 380
309 Llyn Crafnant (0196) In Operation Near Trefriw Conwy County Borough Council The Crafnant Trust (The Charity of Richard James) Impounding 1874 3 500000 182.32 216000 183.23
310 Lliw Lower In Operation Near Swansea City and County of Swansea Dwr Cymru Cyfyngedig Impounding 1978 30 1220000 131000
311 Llantarnam In Operation Torfaen Torfaen County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1926 5.5 23450 61.57 4900 61.57
312 Llyn yr Oerfel In Operation Gwynedd Council The Crown Estate Commissioners Impounding 3.937 33507 306.368 32136 307.1
313 Brombil In Operation Margam Neath Port Talbot County Borough Council Individual(s) Impounding 1780 11.5 20000 109.18 5714 110.48
314 Crown Farm In Operation Raglan Monmouthshire County Council AJ Jones & Sons Impounding 24123.9 69.167 20725
315 Bog Pond In Operation Ponterwyd Ceredigion County Council Individual(s) Impounding 1840 12 100000 323.5 50000 324
316 Cowbridge & Llanblethian FSA (FRM) In Operation Cowbridge | Y Bont Faen Vale of Glamorgan Council Natural Resources Wales (FRM) Impounding 2006 4.4 411000 29 450000
317 Llyn Cwm Annell In Operation Near Llanwrtyd Wells Powys County Council Individual(s) Impounding 1870 15 65000 175 14500
318 Nant Moel In Operation Near Aberdare Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Impounding 1898 25.3 318000 263.347 46000 264.85
319 Llyn Dulyn In Operation Near Tal-y-Bont Conwy County Borough Council RWE Generation UK PLC Impounding 1881 2.74 1091000 534.81 135000 535.31
320 Waltwood In Operation Underwood, Newport Newport City Council Tata Steel UK Limited Non Impounding 1960 7.77 454000 63.4 90000 63.4
321 Cefn Mably No.1 In Operation Pontprennau Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1965 6.2 27900 69 1160000 71
322 Claerwen In Operation Near Rhayader Powys County Council Dwr Cymru Cyfyngedig Impounding 1952 67 48694000 368.96 2630000 9.1
323 Llyn Mair In Operation Near Maentwrog Gwynedd Council Snowdonia National Park Authority Impounding 1780 3 63000 78.02 60000 78.68
324 Llyn Conach In Operation Near Machynlleth Ceredigion County Council Individual(s) Impounding 5 90000 94000
325 Court Colman (265) In Operation Bridgend Bridgend County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1962 6 12408 114.3 2800 114
326 Llyn Llwydiarth In Operation Llanfihangel Powys County Council Individual(s) Impounding 1500 3 18538 1.25 25365 228.6
327 Bryn Bras In Operation Llanrug Gwynedd Council Park Leisure 2000 Ltd Impounding 1900 NW Dam: 2.861, NE Dam: 2.267 77711 179.971 46949 NW Dam: 180.83, NE Dam: 180.71
328 Frampton FSA (FRM) In Operation Llantwit Major Vale of Glamorgan Council Natural Resources Wales (FRM) Impounding 1998 2.25 11310 55.75 17700 2.7
329 Penllergare Valley Woods Upper Lake In Operation Penllegare, Swansea City and County of Swansea Ymddiriedolaeth Penllergare - The Penllergare Trust Impounding 1850 3 13500 9400
330 Hawarden Castle Fish Pond In Operation Hawarden, Flintshire Flintshire County Council Individual(s) Impounding 3.5 10800 34.5 12000 35
331 Arenig Fawr In Operation Near Llidiardau Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1864 4.3 1100000 401 340000 405.28
332 Rhug Hall Lake In Operation Corwen Denbighshire County Council Individual(s) Impounding 1888 4.315 35470 145.716 12914 146.526
333 Cilcain No.1 In Operation Cilcain, Near Mold Flintshire County Council Dwr Cymru Cyfyngedig Impounding 1889 15700
334 Ty Canol In Operation Baglan Neath Port Talbot County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1974 6.28 24440 73.24 4719 73.28
335 Cynwch In Operation Near Dolgellau Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1968 1 255000 223.65 106000 224.33
336 Cilcain No.3 In Operation Near Cilcain Flintshire County Council Dwr Cymru Cyfyngedig Impounding 1902 8.7 36370 269.75 9100 270.89
337 Llyn Eigiau In Operation Near Dolgarrog Conwy County Borough Council RWE Generation UK PLC Impounding 1996 1 415000 372 342000 372.186
338 Bolton Hill In Operation Haverfordwest Pembrokeshire County Council Dwr Cymru Cyfyngedig Non Impounding 1980 6 25000 98 6650 100
339 Castell Nos In Operation Near Maerdy Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Impounding 1881 14 90909 20000
340 Cors-y-Llyn In Operation Builth Wells Powys County Council Natural Resources Wales (Land) Impounding 2002 1.65 90706 76870
341 Llyn Elsi In Operation Near Betws-y-Coed Conwy County Borough Council Allied Hydro Power Limited Impounding 1911 Elsi North Dam: 5.5, Elsi South East Dam: 3, Elsi South West Dam: 3 364000 226.53 106000 Elsi North Dam: 228.68, Elsi South East Dam: , Elsi South West Dam:
342 Cwm-y-Foel In Operation nr Blaenau Ffestiniog Gwynedd Council RWE Generation UK PLC Impounding 1999 7 48000 442.65 30000 443.4
343 Sandmartin Lake In Operation Swyddffynnon, Tregaron Ceredigion County Council Individual(s) Impounding 2012 3.406 26920 13460
344 Cefn Hirgoed No. 2 (101) In Operation Near Bridgend Bridgend County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1996 5 29700 5657
345 Bodlyn In Operation Near Tal-y-Bont Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1894 3.31 763223 383.59 169000 384.48
346 Schwyll No.2 In Operation Ogmore Vale of Glamorgan Council Dwr Cymru Cyfyngedig Non Impounding 19.2 13640 17.8 4090.35
347 Fachwen Pool In Operation Near Newtown Powys County Council Severnside & Newtown Angling Club Impounding 4 90000 185 45000 185.3
348 Stocks Lake In Operation Monmouth Monmouthshire County Council Individual(s) Impounding 2000 4.05 12000 7000
349 Jepson's Pond In Operation Near Dowlais Caerphilly County Borough Council Caerphilly County Borough Council Impounding 1873 6 77054 398.89 19291 400.49
350 Fuches Las In Operation Llanrwst Conwy County Borough Council Natural Resources Wales (WGWE) Impounding 1812 2.63 11453 152.4 10346 153.18
351 New Pond, Dowlais In Operation Near Merthyr Tydfil Merthyr Tydfil County Borough Council Merthyr Tydfil County Borough Council Impounding 1875 7 120030 86970 371.435
352 Bryn Cowlyd In Operation Llanrwst Conwy County Borough Council Dwr Cymru Cyfyngedig Non Impounding 1998 12500 159.95 2500 161.83
353 Ref 2 In Operation Amlwch Anglesey County Council Parys Mountain Mines Ltd Impounding Not Known 2 16052 8026
354 Ty Mawr In Operation Near Bronwylfa Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Impounding 1908 13.4 595000 244.08 94000 245.2
355 Llyn Pen Rhaeadr In Operation Near Aberystwyth Ceredigion County Council Statkraft Energy Limited Impounding 1965 2 100000 412.7 91000 412.7
356 Surf Snowdonia In Operation Dolgarrog Conwy County Borough Council Conwy Adventure Leisure Limited Non Impounding 2014 3.01 40000 6.38 30000 7.01
357 Llynau Diwaunydd In Operation Near Dolwyddelan Conwy County Borough Council RWE Generation UK PLC Impounding 1996 1.97 60800 368 152000 368.57
358 Penycae Upper In Operation Near Penycae Wrexham County Borough Council Hafren Dyfrdwy Cyfyngedig Impounding 1902 10.4 102000 215 25500 217
359 Talybont In Operation Near Brecon Powys County Council Dwr Cymru Cyfyngedig Impounding 1939 30 11668000 188.97 1272000 190.62
360 Nant-y-Maelor In Operation Abersychan Torfaen County Borough Council Dwr Cymru Cyfyngedig Impounding 1850 20457
361 Garn Pond In Operation Blaenavon Torfaen County Borough Council Torfaen County Borough Council Impounding 7.641 11541 378.85 6329
362 Llyn Barcud (Bwlch Nant yr Arian) In Operation Ponterwyd Ceredigion County Council Natural Resources Wales (WGWE) Impounding 1990 3 28000 297.93 26000
363 Tongwynlais No. 2 In Operation Tongwynlais Cardiff Council Dwr Cymru Cyfyngedig Non Impounding 1990 5 27450 109.3 4500 111.3
364 Egnant In Operation Near Pontrhydfendigaid Ceredigion County Council Dwr Cymru Cyfyngedig Impounding 1965 5.6 518000 421.11 185000
365 Clase In Operation Clase, Swansea City and County of Swansea Dwr Cymru Cyfyngedig Non Impounding 1953 5 19658 164.8 4836 166.8
366 Pandorra Upper In Operation Gwydyr Forest, Betws-y-Coed Conwy County Borough Council Natural Resources Wales (WGWE) Impounding 1870 2 12060 6030
367 Pond-y-Gwaith In Operation Near Pontrhydfendigaid Ceredigion County Council Dwr Cymru Cyfyngedig Impounding 1900 4 67000 48000
368 Clydach In Operation Near Ynysybwl Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Impounding 1900 10 55909 16188
369 Challenger Fishing Lake In Operation Nantgaredig, Carmarthen Carmarthenshire County Council Individual(s) Impounding 1993 1.95 17469 18486
370 Llywernog Pond In Operation Llywernog, Aberystwyth Ceredigion County Council Individual(s) Impounding Not Known 4 23736 250 37000 250
371 Craig-y-Pistyll In Operation Near Aberystwyth Ceredigion County Council Dwr Cymru Cyfyngedig Impounding 1877 13 366000 325.25 112000
372 Llyn Alarch In Operation Builth Wells Powys County Council Groe Park and Irfon Angling Club Impounding 1900 5.8 10000 138.5 7850 138.3
373 Llyn Du In Operation Pontdolgoch Powys County Council Individual(s) Impounding 3.5 130000 408 43000 386.591
374 Bolton Hill Lower In Operation Haverfordwest Pembrokeshire County Council Dwr Cymru Cyfyngedig Non Impounding Not Known 4 18939 5625
375 Sloblands Lagoons In Operation Newport Newport City Council GFG Estates P11 Ltd. Non Impounding 1930 4 108105 8.83 180029
376 Llyn Cob In Operation Aberllefenni, Corris Gwynedd Council David Meredith & Sons Ltd. Impounding 1800 3.969 5704 8000
377 Blaen Bran In Operation Near Upper Cwmbran Torfaen County Borough Council Eurolago e Foresta Limited Impounding 1890 15.7 51818 276.15 11614 277.42
378 Ref 7 In Operation Amlwch Anglesey County Council Parys Mountain Mines Ltd Impounding Not Known 1.25 15002 15434
379 Coedty In Operation Near Dolgarrog Conwy County Borough Council RWE Generation UK PLC Impounding 1924 13 300000 269.06 76000 270.25
380 Nant Hir In Operation Near Aberdare Rhondda Cynon Taff County Borough Council Dwr Cymru Cyfyngedig Impounding 1875 24.4 181818 259.08 22600 261.03
381 Birchgrove In Operation Near Neath City and County of Swansea Dwr Cymru Cyfyngedig Non Impounding 1973 5 46900 9490
382 Uskmouth Lagoon 11 In Operation Newport Newport City Council Natural Resources Wales (Land) Non Impounding 1990 6 25000 55263
383 Craig Goch In Operation Near Rhayader Powys County Council Dwr Cymru Cyfyngedig Impounding 1904 37 9220000 317 878000 321.6
384 Goldcliff Lagoons 1, 2 & 3 In Operation Newport Newport City Council Natural Resources Wales (Land) Impounding 1960 2.14 410046 273363 8.1
385 Blaenmelindwr In Operation Near Ponterwyd Ceredigion County Council Aberystwyth Angling Association Ltd Impounding 1850 6 90000 56100
386 Plas Devon FSA (FRM) In Operation Rossett, Wrexham Flintshire County Council Natural Resources Wales (FRM) Impounding 1960 4 25000 25000
387 Lower Quarry Pit In Operation Conwy Conwy County Borough Council Allied Hydro Power Impounding Not Known 46 407000 309 11000 318
388 Coed Darcy North Site In Operation Llandarcy Neath Port Talbot County Borough Council St Modwen Properties PLC Impounding 1923 10.3 403000 30.6 94000
389 Cefn Mably Lodge Lake In Operation Near Cardiff Caerphilly County Borough Council W. R . Jones & Sons Impounding 1993 4 36500 16500
390 Tecwyn Uchaf In Operation Near Llandecwyn Gwynedd Council Dwr Cymru Cyfyngedig Impounding 1896 1.7 1031000 156.21 125000 156.74
391 Llyn-y-Fan Fach In Operation Near Llanddeusant Carmarthenshire County Council Dwr Cymru Cyfyngedig Impounding 1919 10 990000 1010000
392 Crai No.2 In Operation Pen y Cae, Powys Powys County Council Dwr Cymru Cyfyngedig Non Impounding 1995 5.5 10400 263 2504 260
393 Bran In Operation Near Bylchau Denbighshire County Council Dwr Cymru Cyfyngedig Impounding 1898 3.6 257000 434.43 136000 435.19
394 Perthcelyn In Operation Near Mountain Ash Rhondda Cynon Taff County Borough Council ACMS Investments Ltd Non Impounding 1903 11 143500 19000
395 Nant-y-Moch In Operation Near Ponterwyd Ceredigion County Council Statkraft Energy Limited Impounding 1962 56 32564000 339.24 2630000 341.52
396 Caerphilly Castle Outer Moat In Operation Caerphilly Caerphilly County Borough Council Cadw Impounding 1961 5 10000 82.3 7000 84.8
397 Crude Impounding Basin In Operation Near Milford Haven Pembrokeshire County Council Puma Energy (UK) Limited Impounding 1974 8.9 97500 37.58 31000 37.58
398 Llyn Cwm Nantcol In Operation Llanbedr Gwynedd Council David Cooke (Nantcol) Ltd Impounding 1917 11.217 26490 72.265 10239 72.8
399 St. Pierre Lake In Operation Near Chepstow Monmouthshire County Council Marriott International Incorporated Impounding 1800 4 43400 34000












References

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