River Cegin
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The Afon Cegin (''River Cegin'' in English) is a small river draining parts of
North Wales North Wales ( ) is a Regions of Wales, region of Wales, encompassing its northernmost areas. It borders mid Wales to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, with Snowdon ...
and discharging to the
Menai Strait The Menai Strait () is a strait which separates the island of Anglesey from Gwynedd, on the mainland of Wales. It is situated between Caernarfon Bay in the south-west and Conwy Bay in the north-east, which are both inlets of the Irish Sea. The s ...
at
Porth Penrhyn Port Penrhyn () is a harbour located just east of Bangor in north Wales at the confluence of the River Cegin with the Menai Strait. It was formerly of great importance as the main port for the export of slate from the Penrhyn Quarry, the larg ...
. Its name means ''Kitchen River'' in English.


Course

The headwaters include two sites near
Pentir Pentir is a community and electoral ward in the county of Gwynedd, Wales, and is 124 miles (199.9 km) from Cardiff and 205 miles (329.4 km) from London. In 2011 the population of Pentir was 2450 with 58.7% of them able to speak Welsh. ...
. From here the Cegin flows to the east, before turning towards the north and passing through the village of
Glasinfryn Glasinfryn is a small village in Gwynedd, Wales. It is situated between the village of Tregarth and the city of Bangor, Gwynedd, and in the community of Pentir. The village is residential in nature but with many outlying farms. It is noted for h ...
. Just north of here it is crossed by the A55 Expressway. Immediately after this, the Lôn Las Ogwen joins the line of the river, and the two run close together until the mouth of the river. The river is forded by a minor road near
Llandygai Llandygai (, ; ; also Llandegai) is a small village and Community (Wales), community on the A5 road (Great Britain), A5 road between Bangor, Gwynedd, Bangor and Talybont, Bangor, Talybont in Gwynedd, Wales. It affords a view of the nearby Car ...
, and is crossed by the Cegin Viaduct, which carries the main Chester to Holyhead trainline. The river then passes between Maesgeirchen housing estate to the west, and Llandygai Industrial Estate to the east. The river is also crossed by the A5 closer to Bangor. The most northerly stretch is crossed by a further two bridges, which carried the former L. & N.W.R. branchline. The river passes through the arches of the Penrhyn viaduct, before entering the Cegin pool, an area of tidal saltmarsh. The final crossings are: Pont Penrhyn, carrying a road way accessing the west gatehouse of Penrhyn Castle, and a lower bridge now carrying road traffic to Porth Penrhyn. North of these bridges stone walls leading the river to its entry into Bae Hirael.


History

The Cegin valley was heavily industrialised in the eighteenth and nineteenth centuries with two railway lines - the
Penrhyn Quarry Railway The Penrhyn Quarry Railway was a narrow-gauge railway in Caernarfonshire (now Gwynedd), Wales. It served the Penrhyn quarry near Bethesda, Gwynedd, Bethesda, taking their slate produce to Port Penrhyn, near Bangor, Gwynedd, Bangor. The railway w ...
and the Bethesda branch line - carrying slate from quarries in the hills down to Porth Penrhyn to be shipped across the world. The Lôn Las Ogwen cycle-way and footpath runs beside the river along the trackbed of the quarry railway. Just above Port Penrhyn a series of closely connected old bridges cross the Cegin. This complex is a listed building.AFON CEGIN BRIDGE, PENRHYN RAILWAY, PORT PENRHYN
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References

Slate industry in Wales {{Gwynedd-geo-stub