| Llyn Dulyn | |
|---|---|
 | |
  Llyn Dulyn | |
| Location | Snowdonia, North Wales |
| Coordinates | 53°10′49″N 3°56′45″W / 53.18028°N 3.94583°W |
| Type | natural lake, reservoir |
| Primary outflows | Afon Dulyn |
| Basin countries | United Kingdom |
| Surface area | 33 acres (13 ha) |
| Max. depth | 189 ft (58 m) |
Llyn Dulyn (Welsh for 'black lake') is a lake on the edge of the Carneddau range of mountains in Snowdonia, North Wales. The lake is 33 acres (130,000 m2) in extent and 189 feet (58 metres) deep. Less than a kilometre to its south lies the smaller Llyn Melynllyn. Cliffs rise steeply from the lake edge up to the summits of Garnedd Uchaf and Foel Grach, giving it a dark brooding appearance - hence its name.
The lake was dammed in 1881, to increase its capacity, and was significantly altered in 1931 by Llandudno Waterworks.As a reservoir Dulyn (along with Melynllyn) provided water for the town of Llandudno. The reservoir was repurposed in 1997 for use as hydroelectric generation.
The outflow from the lake, the Afon Dulyn, also feeds water into neighbouring Llyn Eigiau. Afon Dulyn flows north-east, passing Tal-y-bont before joining the River Conwy.
The cwm has been the site of a number of aeroplane crashes[1] including that of an American Dakota aircraft which crashed into the cliffs above the lake in 1944 killing all four crew.[2]
- ^ The Lakes of Eryri by Geraint Roberts, Gwasg Carreg Gwalch, 1985
- ^ "Douglas C-47B 43-48473 of the 27th Air Transport Group flew into the cliffs above Llyn Dulyn in the Carneddau while flying form Le Bourget to Burtonwood on the 11th November 1944". www.peakdistrictaircrashes.co.uk. 27 July 2016. Retrieved 7 October 2017.