This is a list of lakes in Wales, including those created as reservoirs. The names of most lakes in Wales start with the word "Llyn", which is Welsh for "lake". Except where otherwise referenced, all lakes listed here are named on the relevant Ordnance Survey map at 1:25000 scale. [1]
In terms of surface area, the ten largest lakes in Wales are
All of the above, with the exception of Bala Lake, are reservoirs held back by dams. Bala Lake was the largest natural lake in Wales though its level has been artificially controlled by sluices since about 1804. [2] The largest natural lake in South Wales is Llangorse Lake (Llyn Syfaddan), which is also the second largest natural lake.
This list of Welsh lakes ordered by principal areas (counties and county boroughs) includes lakes with a surface area of greater than 5 acres (2.0 ha ), but excludes those lakes and ponds created as part of an active industrial site (i.e., works ponds) and also excludes service reservoirs used to store drinking water as part of the water supply system. Grid references identify the approximate centre of the lake or the dam in the case of artificial reservoirs. For some lakes the principal area boundary passes through a lake; in these cases the lake is represented in the list for each appropriate authority. Known occurrences include Llyn Brenig, Pontsticill Reservoir, Llwyn-on Reservoir, Cantref Reservoir and Dol-y-gaer Reservoir. All occurrences are marked with an asterisk (*). [3]
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Llyn Alaw | River Alaw | SH375853 | 762 | 308 | water supply to north Anglesey |
Llyn Bodgylched | No main catchment | SH585770 | |||
Llyn Cefni | Afon Cefni | SH443771 | 167 | 68 | water supply to central Anglesey |
Llyn Coron | No main catchment | SH380700 | 69 | 28 | |
Llyn Dinam | No main catchment | SH312778 | 24 | 9.7 | |
Llyn y Gors | No main catchment | SH575748 | amenity (fishing) | ||
Llyn Gwaith-glo | No main catchment | SH450713 | |||
Llyn Llygeirian | No main catchment | SH347898 | |||
Llyn Llywenan | No main catchment | SH347815 | Largest natural body of water on Anglesey | ||
Llyn Llwydiarth | Afon Braint | SH549786 | |||
Llyn Maelog | No main catchment | SH325730 | 65 | 26 | former water supply to Rhosneigr |
Llyn Pen y Parc | No main catchment | SH585751 | water supply (disused) | ||
Llyn Penrhyn | No main catchment | SH313770 | 55 | 22 | RSPB bird reserve |
Llyn Rhosddu | No main catchment | SH425648 | |||
Llyn Traffwll | No main catchment | SH325770 | 91 | 37 | |
Llyn Treflesg | No main catchment | SH307770 | RSPB bird reserve | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Blaen-y-Cwm Reservoir (Blaen Clydach Reservoir) | Ebbw River/River Clydach | SO174131 | 50 | 20 | Reservoir, originally constructed in 1813 to supply the Nantyglo Ironworks. [4] |
Carno Reservoir | Ebbw River | SO164131 | reservoir | ||
Cwmtillery Reservoir | Ebbw River | SO220071 | reservoir | ||
Lower Boat Pond | Ebbw River | SO174118 | 6.25 | 2.53 | amenity, formerly industrial supply along with smaller Upper Boat Pond |
Rhyd-y-blew Pond | Ebbw River | SO160112 | |||
Parc Brynbach lake | Sirhowy River | SO127101 | amenity | ||
Shon-Sheffrey's Reservoir | Sirhowy River | SO129116 | reservoir | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Kenfig Pool | River Kenfig | SS797815 | 70 | 28 | natural lake |
Craig yr Aber Reservoir | Nant Craig yr Aber | SS853857 | man-made dam | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Lower Blaen Rhymney Reservoir | Rhymney River | SO103103 | reservoir | ||
Upper Blaen Rhymney Reservoir | Rhymney River | SO098104 | reservoir | ||
Bute Town Reservoir | Rhymney River | SO101091 | |||
Caerphilly Castle moat | Rhymney River | ST155872 | |||
Nant-y-draenog Reservoir | Sirhowy River | ST188935 | 5 | 2.0 | reservoir |
Parc Cwm Darran Lake | Rhymney River | SO117032 | amenity | ||
Rhaslas Pond | Rhymney River | SO095072 | |||
Ffrwd Farm lake (west) | Rhymney River | ST154920 | angling | ||
Ffrwd Farm lake (east) | Rhymney River | ST155920 | angling | ||
Pen-y-fan Pond | Sirhowy River | SO196004 | 14 | 5.7 | built as canal feed reservoir. |
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Cardiff Bay | River Taff/River Ely | ST190726 | 500 | 200 | amenity |
Hendre Lake | No main catchment | ST245805 | 12 | 4.9 | recreation and amenity |
Llanishen Reservoir | Rhymney River | ST185815 | 59 | 24 | water supply to Cardiff |
Lisvane Reservoir | Rhymney River | ST189822 | water supply to Cardiff | ||
Roath lake | Rhymney River | ST184795 | 30 | 12 | recreation and amenity |
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Llyn Brianne | River Tywi | SN790485 | 530 | 210 | regulation reservoir |
Garn Ffrwd pond? | Gwendraeth Fach | SN508142 | 5 | 2.0 | |
Llanelli North Dock lake | Coastal waterbody | SS498996 | amenity (former dock) | ||
Llyn Llech Owen Reservoir | Gwendraeth Fawr | SN568151 | amenity/reservoir | ||
Cwm Lliedi Reservoir | Afon Lliedi | SN519036 | ex water supply | ||
Llyn y Fan Fach | River Tywi | SN803219 | 25 | 10 | natural |
Llyn Taliaris | Afon Dulais | SN634283 | |||
Lower Talley Lake | Afon Cothi | SN633331 | 62 | 25 | natural lake |
Lagoons at National Wetlands Centre | Coastal waterbodies | SS529986 | conservation/wildlife | ||
Old Castle Pond/Pond Twym | Coastal lake | SN500003 | Amenity | ||
Sandy Water | Coastal lake | SN495003 | amenity | ||
Upper Lliedi Reservoir | Afon Lliedi | SN511045 | reservoir | ||
Upper Talley Lake | Afon Cothi | SN631337 | natural lake | ||
Usk Reservoir | River Usk | SN832288 | water supply | ||
Delta Lake | Coastal lake | SS507987 | amenity | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Brickfields Pond | River Clwyd | SJ012803 | 8.9 | 3.6 | Local nature reserve |
Llyn Brân | SH961592 | 31.4 | 12.7 | natural | |
Llyn Brenig | River Dee | SH973555 | 920 | 370 | flow regulation |
Llyn Cyfynwy | SJ217546 | 17.5 | 7.1 | ||
Llyn Gweryd | SJ172550 | 13.1 | 5.3 | ||
Llyn Mynyllod | SJ012402 | 6.2 | 2.5 | ||
Nant-y-Ffrith Reservoir | River Cegidog | SJ242530 | 12.1 | 4.9 | |
Pendinas Reservoir | River Cegidog | SJ235518 | 16.3 | 6.6 | |
Rhyl Marine Lake | River Clwyd | SH999804 | 28.7 | 11.6 | |
unnamed lake on Rûg estate | River Dee | SJ058440 | 8.4 | 3.4 | |
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Llyn Helyg | River Clwyd | SJ113772 | 37 | 15 | |
Padeswood Pool | SJ278619 | 12.6 | 5.1 | angling | |
Shotwick Lake | River Dee | SJ315725 | amenity | ||
unnamed reservoir, Cilcain | SJ155641 | 5.4 | 2.2 | ||
unnamed reservoir, Oakenholt | SJ262710 | 5.7 | 2.3 | ||
Ysceifiog Lake | SJ147716 | 13.8 | 5.6 | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Cyfarthfa Castle Lake | River Taff | SO039073 | amenity | ||
Dol-y-gaer (or Pentwyn) Reservoir * | River Taff | SO060118 | water supply | ||
Llwyn-on Reservoir * | River Taff | SO012113 | water supply | ||
Penywern Middle Pond | River Taff | SO073083 | angling | ||
Penywern Top Pond | River Taff | SO071086 | angling | ||
Pontsticill Reservoir * | River Taff | SO060118 | water supply | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Llandegfedd Reservoir | River Usk | ST325985 | 434 | 176 | water supply |
Pwll Pen-ffordd-goch / Keepers Pond | River Usk | SO255109 | amenity, formerly served Garn-ddyrys ironworks | ||
Wentwood Reservoir | River Usk | ST430929 | 41 | 17 | water supply |
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Cwmwernderi Reservoir | SS817902 | reservoir | |||
Eglwys Nunydd | River Afan | SS791855 | 260 | 110 | industrial water supply, fishing |
Furzemill Pond | River Afan | SS810857 | 5 | 2.0 | former millpond? |
Llyn Fach | River Neath | SN905037 | Natural lake | ||
Rheola Pond | River Neath | SN843043 | |||
larger un-named lake at Aberclwyd | River Neath | SN847043 | amenity | ||
smaller un-named lake at Aberclwyd | River Neath | SN852045 | amenity | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Bosherston Lakes | Coastal stream | SR974946 | artificial | ||
Llys-y-Frân Reservoir | Western Cleddau | SN036242 | 212 | 86 | water supply |
Rosebush Reservoir | Western Cleddau | SN061291 | 30 | 12 | water supply |
Note: Caban Coch and Garreg-ddu reservoirs are separately named but form one contiguous area of water at normal levels. The area quoted is for the two combined. At high water levels, Pentwyn Reservoir is continuous with Pontsticill Reservoir, its dam being submerged.
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Cantref Reservoir * | River Taff | SN996154 | water supply | ||
Dare Valley Country Park lower lake | River Cynon | SN977028 | amenity | ||
Lluest-wen Reservoir | River Rhondda Fach | SN947017 | |||
Llwyn-on Reservoir * | River Taff | SO012113 | 150 | 61 | water supply |
Llyn Fawr | River Cynon | SN917034 | 24 | 9.7 | Natural but expanded for water supply |
Nant-hir Reservoir | River Cynon | SN989069 | |||
Nant-moel Reservoir | River Cynon | SN982071 | |||
Penderyn Reservoir | River Neath | SN938072 | |||
?Perthgelyn Reservoir | River Cynon | ST053970 | reservoir | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Lake Fendrod | River Tawe | SS676967 | 13 | 5.3 | amenity |
Lower Lliw Reservoir | River Lliw | SN650036 | water supply | ||
Oxwich Marsh Lake | coastal stream | SS503873 | 15 | 6.1 | natural lake. Area is a minimum figre. |
Upper Lliw Reservoir | River Lliw | SN661062 | water supply | ||
Tawe Barrage | River Tawe | SS664926 | amenity | ||
Specimen Lake | River Loughor | SN598056 | 10 | 4.0 | amenity/angling |
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Blaen Bran Reservoir (lower) | Afon Lwyd | ST267971 | |||
Coity Pond | Afon Lwyd | SO233090 | former reservoir | ||
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Cosmeston Lake | River Cadoxton | ST176692 | amenity | ||
Hensol Lake | River Ely | ST045789 | amenity and reservoir | ||
Hensol Mill Pond | River Ely | ST050790 | 6 | 2.4 | former mill pond |
Lake name | Catchment | Grid ref. | Area | Satatus/Use | |
---|---|---|---|---|---|
Acres | Hectares | ||||
Cae Llwyd Reservoir | River Dee | SJ270479 | 10.6 | 4.3 | |
Chirk Castle Lake | River Dee | SJ269386 | 11.1 | 4.5 | |
Fenn's Bank Mere | SJ505386 | 8.4 | 3.4 | ||
Gresford Flash | River Dee | SJ346536 | 8.2 | 3.3 | amenity |
Hanmer Mere | SJ452392 | 44.4 | 18.0 | natural lake, SSSI | |
Monk's Pool | River Dee | SJ303448 | 5.2 | 2.1 | |
Pant-yr-ochain Lake | River Dee | SJ349529 | 14.1 | 5.7 | |
Penycae Top Reservoir | River Dee | SJ267452 | 6.2 | 2.5 | |
Ty Mawr Reservoir | River Dee | SJ276480 | 21.3 | 8.6 | |
Wynnstay Park Lake | River Dee | SJ307428 | 8.9 | 3.6 | |
Lakes and reservoirs within each of Wales' three national parks.
Lake name | Catchment | Grid ref. | Area | Status/Use | Principal area/s | |
---|---|---|---|---|---|---|
Acres | Hectares | |||||
Bosherston Lakes | Coastal stream | SR974946 | natural lakes | Pembrokeshire | ||
Rosebush Reservoir, Rosebush | Western Cleddau | SN061291 | 30 | 12 | water supply | Pembrokeshire |
Many Welsh lakes supply the nation itself with water, however, some lakes and reservoirs supply England. [6] [7]
The main reservoirs created for this purpose include:
Reservoir name | Location | Built by | Supplies water to |
---|---|---|---|
Lake Vyrnwy | Powys | Liverpool Corporation | Liverpool, Cheshire and Manchester |
Claerwen | Elan Valley reservoirs | Birmingham Corporation Water Department | Birmingham |
Craig-goch | Elan Valley reservoirs | Birmingham Corporation Water Department | Birmingham |
Pen-y-garreg | Elan Valley reservoirs | Birmingham Corporation Water Department | Birmingham |
Garreg-ddu | Elan Valley reservoirs | Birmingham Corporation Water Department | Birmingham, |
Caban-coch [8] | Elan Valley reservoirs | Birmingham Corporation Water Department | Birmingham |
Alwen Reservoir | Conwy | The Corporation of Birkenhead | Birkenhead [9] |
Llyn Celyn (via and Bala Lake) | Gwynedd | Liverpool Corporation Waterworks | Liverpool |
Llyn Clywedog | Powys | Reed and Mallick of Salisbury | Shropshire, West Midlands to Bristol |
Lake name | Catchment | Grid ref. | Area (acres) | Status/Use | Principal area |
---|---|---|---|---|---|
Bryn-bach Pond [10] | Sirhowy River | SO122100 | formerly industrial use (not same site as modern lake) | Blaenau Gwent | |
Cairn Mound Impounding Reservoir | River Clydach | SO202136 | former reservoir [11] | Blaenau Gwent | |
Clyn-mil Pond [12] | River Taff | SO062052 | formerly industrial use | Merthyr Tydfil | |
Glyn-dyrys Pond [13] | River Taff | SO049047 | formerly industrial use | Merthyr Tydfil | |
Hirwaun Ponds [14] | River Cynon | SN945060 | formerly industrial use | Rhondda Cynon Taf | |
Lower Neuadd Reservoir | River Taff | SO030180 | former reservoir (dam breached) | Merthyr Tydfil [15] | |
Llyn Nantlle-isaf [16] | Afon Llyfni | SH506528 | natural lake | Gwynedd | |
Pitwellt Pond | River Taff | SO078098 | former reservoir (dam breached) | Merthyr Tydfil | |
Rhyd-y-blew Pond (Rassa) | Ebbw River | SO160112 | formerly industrial use | Blaenau Gwent | |
Scotch Peter's Reservoir [17] | Sirhowy River | SO155088 | former reservoir | Blaenau Gwent | |
The River Dee is a river flowing through North Wales, and through Cheshire, England, in Great Britain. The length of the main section from Bala to Chester is 113 km and it is largely located in Wales. The stretch between Aldford and Chester is within England, and two other sections form the border between the two countries.
The Llanberis Lake Railway is a 1 ft 11+1⁄2 in narrow gauge heritage railway that runs for 2.5 miles (4 km) along the northern shore of Llyn Padarn in north Wales in the Snowdonia National Park. The starting point is the village of Llanberis at the eastern end of the lake, with the western terminus at Pen Llyn in the Padarn Country Park. The return journey takes around 60 minutes.
The Dee regulation scheme is a system of flow balancing and quality management along the River Dee managed by a consortium of the three largest water companies licensed to take water from the river, United Utilities, Welsh Water and Severn Trent Water; together with the regulator, Natural Resources Wales.
The A499 road is the major road of the Llŷn peninsula in North Wales.
The Ancient Monuments Protection Act 1882 was an Act of the Parliament of the United Kingdom of Great Britain and Ireland. It was introduced by John Lubbock, 1st Baron Avebury, recognising the need for a governmental administration on the protection of ancient monuments, and was finally passed after a number of failed attempts on heritage protection acts. The gradual change towards a state-based authority responsible for the safeguarding of the Kingdom's national heritage manifested itself through the appointment of the first Inspector of Ancient Monuments in 1882, General Pitt Rivers.
Sarn Badrig, also spelled Sarn Padrig, is one of several more or less parallel shingle reefs extending under the sea in Cardigan Bay on the west coast of Wales. The causeway is made of glacial deposits left by receding ice sheets at the end of the last ice age.
Northumberland County was one of the original Nineteen Counties in New South Wales and is now one of the 141 cadastral divisions of New South Wales. It included the area to the north of Broken Bay, which compasses the Central Coast region and Lake Macquarie as well as Newcastle(Greater Newcastle) in the Hunter region. It was bounded by the part of the Hawkesbury River to the south, the Macdonald River to the south-west, and the Hunter River to the north.
Camden County was one of the original Nineteen Counties in New South Wales and is now one of the 141 cadastral divisions of New South Wales. It included the coastal area near Wollongong south to the Shoalhaven River, and also inland encompassing Berrima and Picton. Its western boundary was the Wollondilly River. The first settlement in the area was Camden Park, established by John Macarthur in 1806, just across the Nepean River from Cumberland County. It was the first land across the Nepean to be settled. Camden is a present-day suburb of Sydney in the same area, although parts of it are in Cumberland.
St Vincent County was one of the original Nineteen Counties in New South Wales and is now one of the 141 cadastral divisions of New South Wales. It included the south coast area encompassing Batemans Bay, Ulladulla, Jervis Bay and inland to Braidwood. The Shoalhaven River is the boundary to the north and west, and the Deua River the boundary to the south.
Argyle County was one of the original Nineteen Counties in New South Wales and is now one of the 141 cadastral divisions of New South Wales. It includes the area around Goulburn. It is bounded by Lake George in the south-west, the Shoalhaven River in the east, and the Wollondilly River in the north-east.
Bathurst County was one of the original Nineteen Counties in New South Wales and is now one of the 141 cadastral divisions of New South Wales. It includes the area to the south-west of Bathurst to Cowra and Orange. The Lachlan River is the boundary to the south-west, the Belubula River forms part of the northern boundary, with the Fish River on the northeastern boundary. Blayney is located roughly in the middle.
Auckland County is one of the 141 cadastral divisions of New South Wales. It is at the extreme south-east of the state, with the Victorian border to the south, and the area to the north of the Brogo River the boundary to the north. It includes Bega, Eden and Merimbula.
The Afon Tarell is a river in Powys, Wales, which rises to the west of the Brecon Beacons in Brecon Beacons National Park and flows north, then north-east, for 12 miles (20 km) into the River Usk.