River Dee, Wales

River Dee
River Dee at Llangollen
Map of the route of the River Dee in Wales and England
Native nameAfon Dyfrdwy (Welsh)
Location
CountryEngland and Wales
CitiesChester
Physical characteristics
Source 
  locationslopes of Dduallt above Llanuwchllyn, Snowdonia, Wales
  coordinates52°49′56″N 3°45′56″W / 52.8322°N 3.7656°W / 52.8322; -3.7656
  elevation450 m (1,480 ft)
MouthDee Estuary
  coordinates
53°21′14″N 3°13′33″W / 53.3539°N 3.2258°W / 53.3539; -3.2258
  elevation
0 m (0 ft)
Length113 km (70 mi)
Basin size1,816.8 km2 (701.5 sq mi)
Discharge 
  locationChester Weir
  average29.71 m3/s (1,049 cu ft/s)
Discharge 
  locationManley Hall
  average31.03 m3/s (1,096 cu ft/s)
Discharge 
  locationBala Lake
  average13.06 m3/s (461 cu ft/s)
Basin features
Tributaries 
  leftTryweryn, Alwen, Clywedog, Alyn
  rightCeiriog, Wych Brook

The River Dee (Welsh: Afon Dyfrdwy, Latin: Deva Fluvius) flows through North Wales and Cheshire, England. The majority of the river is located in Wales, with the stretch between Aldford and Saltney within England and two other sections forming the border between the two countries. The length of the section from Bala to Chester is 113 km (70 miles).

The river rises on Dduallt in Snowdonia and flows east through Bala Lake, Corwen, and Llangollen. It turns north near Overton-on-Dee and forms part of the England–Wales border before fully entering England near Aldford, north-east of Wrexham. It flows through Chester then re-enters Wales near Saltney; the final section is canalised and discharges to the Irish Sea via an estuary 23 km (14 miles) long.