The River Conwy is a river in north Wales. From its source to its discharge in Conwy Bay it is 55 kilometres (34 mi) long and drains an area of 678 square km. "Conwy" was formerly Anglicised as "Conway."
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 Afon Ogwen is a river in north-west Wales draining from some of the greatest peaks in Snowdonia before discharging to the sea on the eastern side of Bangor, Gwynedd.
The River Dwyryd is a river in Gwynedd, Wales which flows principally westwards; draining to the sea into Tremadog Bay, south of Porthmadog.
Llyn Cowlyd is the deepest lake in northern Wales. It lies in the Snowdonia National Park at the upper end of Cwm Cowlyd on the south-eastern edge of the Carneddau range of mountains, at a height of 1,164 feet (355 m) above sea level. The lake is long and narrow, measuring nearly 2 miles (3 km) long and about a third of a mile wide, and covers an area of 269 acres (1.1 km2). It has a mean depth of 109 feet (33 m) and at its deepest has given soundings of 229 feet (70 m), this being some 45 ft (14 m) greater than its natural depth, the water surface having been raised twice by the building of dams.
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.
Llyn Eigiau is a lake on the edge of the Carneddau range of mountains in Snowdonia, Conwy, Wales. The name Eigiau is thought to refer to the shoals of fish which once lived here. Early maps refer to it as Llynyga. It is thought that a small number of Arctic char exist in the lake after they were transferred here from Llyn Peris, and certainly it is one of the few lakes in Wales to have its own natural brown trout.
Afon Ddu is the name of several rivers in Snowdonia in north-west Wales:
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.
Afon 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.
Afon Eigiau is a small river in the Carneddau mountains in Snowdonia, in north-west Wales, which flows down Cwm Eigiau and into Llyn Eigiau.
The Eigiau Tramway might refer to the Eigiau Quarry Tramway or to the Eigiau Reservoir Tramway.
The Cowlyd Tramway was a 2 ft narrow gauge railway line used to convey men and materials to Llyn Cowlyd Reservoir, near Trefriw in North Wales during the enlargement of the dam, and thereafter for maintenance purposes.
The Cedryn Quarry 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.
The small river near Conwy County Borough is the River Aled, which flows into River Elwy.
There are a large number of reservoirs in Wales reflecting the need for the supply of water for both industry and for consumption, both within the country itself and in neighbouring England. A number also provide hydroelectricity and many old reservoirs also provided motive power for industries, especially for the processing of minerals such as metal ores and slate.
The Afon Gwyrfai is a short river in Gwynedd, Wales. For half of its length it flows through Snowdonia National Park. Exiting Llyn y Gader it flows north through the small village of Rhyd-ddu to enter the southeastern end of Llyn Cwellyn. Downstream of the lake it flows northwest past Betws Garmon, leaving the national park and continues to the southern edge of Waunfawr. It then turns slightly west to flow on to Bontnewydd beyond which it turns slightly south to enter Foryd Bay. The tidal channel within the bay flows north into the western end of the Menai Strait. Principal tributary streams include the Afon Treweunydd which contributes water from the reservoir of Llyn Ffynnon-y-gwas and from the lakes of Llyn Glas, Llyn Coch and Llyn Nadroedd in Cwm Clogwyn immediately west of the summit of Snowdon. The tidal channel of the Gwyrfai within Foryd Bay also accepts the flow of the left bank tributaries, the Afon Foryd, Afon Rhyd and Afon Carrog. The river is shadowed by the line of the Welsh Highland Railway for much of its length, and by which it is crossed four times.
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