Afon Cefni is one of the major rivers on the island of Anglesey, Wales. It is 16.9 kilometres (11 mi) long. Its source is near to the village of Capel Coch, before flowing through Bodffordd and into Llyn Cefni in the centre of the island. It continues to run south through the county town of Llangefni. Just north of the A55 the river turns and flows south-west.[1] It passes through the flatlands of the Malltraeth Marshes, where the river course was altered in 1824, creating a canal-like straight stretch. This part of the river and the surrounding marshes, part of which is a RSPB reserve, are frequented by a variety of wetland birds which in their turn are preyed on by falcons, hawks and harriers. A cycle trail follows the straightened course of the river as it flows through the marshes.[2]
Finally it flows under a bridge carrying the North Wales Coast Railway Line at Malltraeth Sands in the south-west of the island and into the Irish Sea. The viaduct is described as "noble" and has nineteen arches.[3] An embankment carries the A4080 across the estuary at the village of Malltraeth, half a mile below the railway bridge.[1] Another RSPB reserve is to be found in the estuary here, Newbourough Warren. Malltraeth Pool at the north end of the estuary is a place visited by many waterbirds during their spring and autumn migrations, and other wildfowl and waders are to be seen on the estuary all winter. Newborough Forest on the southern shore is used by large numbers of ravens as a winter roost, and a peninsula and a rocky islet in the estuary are a breeding ground for shags and cormorants.[4]
Migration of fish and eels is effectively blocked by the dam at the Cefni water treatment works, holding back the Cefni reservoir. Attempts to prompt the installation of a fish pass have proven unsuccessful to date.
There was a ship named after the river built in Glasgow in 1890 by a company based in Menai Bridge.
There is currently a tug named Afon Cefni, operated by Holyhead Towing. It can be tracked on Ship AIS websites.
^ abOS Landranger 114: Anglesey / Ynys Môn. Ordnance Survey. 2016. ISBN 978-0-319-26212-2.
^"After the rain: Cors Ddyga / Malltraeth Marsh". Newborough, Anglesey. 29 August 2014. Retrieved 14 June 2016.
^Carradice, Phil (2015). The Railways of Wales. Amberley Publishing Limited. p. 134. ISBN 978-1-4456-3855-3.
^Tipling, David (2006). Where to Watch Birds in Britain and Ireland. New Holland Publishers. p. 84. ISBN 978-1-84537-459-4.
AfonCefni is one of the major rivers on the island of Anglesey, Wales. It is 16.9 kilometres (11 mi) long. Its source is near to the village of Capel...
water needs for the people of Anglesey for the foreseeable future. The AfonCefni is one of the main rivers of Anglesey. It was dammed about 1 mi (1.6 km)...
the north of the island and Llyn Cefni in the centre of the island, which is fed by the headwaters of the AfonCefni. The climate is humid (though less...
into Llyn Coron) AfonCefni (River Cefni) Afon Newydd (L) Afon Ceint (L) Afon Erddreiniog (L) (flows into Cefni Reservoir) The Afon Braint bifurcates...
Llangefni (meaning "church on the River Cefni", Welsh pronunciation: [ɬaŋˈɡɛvni]) is the county town of Anglesey in Wales. At the 2011 census, Llangefni's...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
on two sides by rivers: to the south-east by the Afon Braint and to the north-west by the AfonCefni. It includes Llanddwyn Bay and Malltraeth Bay, divided...
The reclaimed land is called Malltraeth Marsh, through which runs the AfonCefni, which was canalised in 1824. The marsh is a Site of Special Scientific...
island's county town, Llangefni, and is located on the west bank of the Afon Ffraw (Ffraw River). The community includes Soar and Dothan. Located near...
6 km) long embankment, and the subsequent canalisation in 1824 of the AfonCefni. The name Malltraeth comes from mall ('bad'), and traeth ('sandy shore')...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
road passes. To the east and south of Bodorgan lies the estuary of the AfonCefni and the extensive Malltraeth Sands. Bodorgan Hall is the largest country...
which is now by-passed by a modern bridge constructed in the 1970s. The Afon Cadnant drains into the Menai Strait at this point and this small estuary...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
southwest of Llangefni, and is named after Saint Cristiolus. The River Cefni flows through the village. The village is within a mile of the A5 and A55...
wood' in the Welsh language. Llangoed is on the banks of a brook called the Afon Lleiniog, which flows from the hamlet of Glanrafon to the sea, beneath the...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...
Tregele Tŷ Croes Valley Hydrological features Afon Alaw Afon Braint Afon Cadnant AfonCefni Llyn Alaw Llyn Cefni Llyn Cerrig Bach Llyn Llywenan Menai Strait...