Afon Porth-llwyd

Dolgarrog is a village and community in Conwy County Borough, in Wales, situated between Llanrwst and Conwy, very close to the Conwy River. The village is well known for its industrial history since the 18th century and the Eigiau dam disaster, which occurred in 1925. The population was 414 at the 2001 Census, increasing to 446 at the 2011 Census. The community extends up to, and includes part of, Llyn Cowlyd in the Carneddau. The village is served by Dolgarrog railway station, a halt on the other side of the river Conwy, The bridge allowing access to the station was slated for closure in 2021 due to it being structurally unsafe, but reopened after repairs in 2023.Surf Snowdonia, the world's first commercial artificial surfing lake, is located in Dolgarrog on the site of the old aluminium factory. Across the valley is the crag of Cadair Ifan Goch.

Dolgarrog Power Station in Dolgarrog, Wales was originally built in 1907 as part of an aluminium smelting plant. It uses water turbines to drive electricity alternators. Public supplies began in 1922 when power lines were constructed to transmit electricity from the power station to Colwyn Bay, Conwy and Llandudno. The station was vested in the British Electricity Authority and its successors following nationalisation in 1948. It is currently (2021) operated by RWE NPower UK.

The Eigiau Tramway might refer to the Eigiau Quarry Tramway or to the Eigiau Reservoir Tramway.

Adventure Parc Snowdonia, formerly Surf Snowdonia is an adventure park and tourist attraction, incorporating an artificial wave pool, at Dolgarrog in the picturesque Conwy valley, north Wales, owned by Conwy Adventure Leisure Ltd. It is the world's first commercial artificial surfing lake. The site cost a total of £12 million and opened in August 2015.

Coed Dolgarrog National Nature Reserve is a nature reserve which covers the steep western side of the Conwy Valley, outside the village of Dolgarrog, around 10 kilometres south of Conwy and 6.5 kilometres north of Llanrwst in Conwy County Borough, Wales.

The Cedryn Quarry Tramway (later largely used as the route of the Eigiau Tramway) was an industrial narrow gauge railway that connected the slate quarries at Cedryn and Cwm Eigiau to the quays at Dolgarrog in the Conwy valley.

Tal-y-Bont is a small village in Conwy County Borough, Wales and lies in the Conwy Valley, west of the River Conwy, on the B5106 road, 6 mi (9.7 km) from the town of Conwy to the north, and six miles from Llanrwst to the south, and in the community of Caerhun. It lies adjacent to the village of Dolgarrog to the south, and below the small settlement of Llanbedr-y-Cennin to the west. The population is around 400. The 'Bont' (the mutated form of pont, Welsh for "bridge") in the name probably refers to the bridge over the Afon Dulyn, a tributary of the nearby River Conwy, which runs through the village. The village is served by buses and the nearby Dolgarrog railway station. Castell, the oldest section of Tal-y-Bont, has a bar/restaurant and a 5-acre garden centre. The village also has a shop and post office and a café, formerly Y Bedol Pub.

Llanbedr-y-Cennin is a small village in Conwy county borough, Wales, in the community of Caerhun. It lies in the foothills on the western side of the Conwy valley, in Wales. The river Conwy runs through the valley, running into the sea to the north, at the town of Conwy, which is about five miles north of the village. The village lies on the eastern edge of the Snowdonia National Park. Near the village lies the Iron Age fort of Pen y Gaer. The village itself has no bus service, but buses can be accessed at nearby Tal-y-Bont. In recent years the village has become popular with ornithologists as one of the best places in Wales to observe rare hawfinches. They feed adjacent to the churchyard, attracting many bird watchers in early spring.

The Nod Glas Formation (also known as the Nod Glas Black Shale, the Cadnant Shale, the Penarwel Mudstones or just Nod Glas) is an Ordovician lithostratigraphic group (a sequence of rock strata) in Mid Wales. The rock of the formation is made up of pyritous, graptolitic mudstone that is generally black in colour. It weathers to a soft, very well cleaved and coal-like material. The formation runs from Conwy in the north, down to Cardigan Bay in the area around Aberdyfi and Tywyn, though it is not a continuous over this area.The formation is the topmost of the Caradoc Series in North Wales, and the name refers to all the black shale beds in the area. In South Wales, the equivalent beds of shale are called the Dicranograptus Shales.

Coedty Reservoir is a reservoir in Snowdonia, North Wales. It is fed by the waters of Afon Porth-llwyd which flows from Llyn Eigiau. The reservoir lies at a height of 900 feet (274 m), and measures some 12 acres (49,000 m2) in size. It contains brown trout. The original dam was built in 1924 to provide hydro-electric power to the aluminium smelting works in Dolgarrog. In 1925, the Eigiau dam broke, and the flood of water from that also burst Coedty dam. The resultant flood caused the loss of 16 lives in Dolgarrog. The dam was rebuilt in 1926, and altered again in 1956. Water from the reservoir, which has a catchment area of around 27 square kilometres, is carried via a 3 km large metal pipe down to the hydro-electric power-station in Dolgarrog.Coedty dam is a balance tip dam; water flows from it automatically when it reaches high levels. This excess water flows into a spectacular gorge used by outdoor pursuit groups. Gorge walking here, however, can be dangerous because of the sudden releases of water from the reservoir which can occur. The eastern side of the lake is skirted by the trackbed of the former Eigiau Tramway, created to aid the construction and maintenance of Llyn Eigiau dam. Nearby the Cowlyd Tramway branched off, built to aid the construction of the dam at Llyn Cowlyd.

Afon Dulyn (English : River Dulyn) is the outflow from Llyn Dulyn, a lake in the Carneddau mountains in north-west Wales. It is a tributary of the river Conwy. Just below Afon Dulyn the river is joined by Afon Melynllyn, a small river flowing from neighbouring Llyn Melynllyn. The river does not carry a great deal of water because water is transferred from Llyn Dulyn to the reservoirs of Llyn Eigiau and Llyn Cowlyd.

Afon Ddu (Welsh for black river) is the name of several rivers in Snowdonia in north-west Wales: The largest of these flows from Llyn Cowlyd on the south-eastern edge of the Carneddau range to join the river Conwy, passing Pont Dolgarrog on the B5106 road, just south of the village of Dolgarrog. The gorge cut by the river at this point is popular for gorge walking, the river passing at this point through a Site of Special Scientific Interest for broadleaved woodland and a number of rare species of plant. Another is a stream draining the south-eastern slopes of Drum and Foel-fras, mountains in the Carneddau mountain range. It is a tributary of Afon Dulyn, itself is a tributary of the river Conwy. A third is a stream flowing north-west from Bwlch y Ddeufaen. It is a tributary of the Afon Llanfairfechan, joining it immediately above the village of Llanfairfechan. A fourth is a tributary of the River Dysynni in the northern Dysynni Valley, famed for Craig y Deryn.