- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°1'28"N 3°29'5"W
- Eastings/Northings: 300500, 348500
- OS Grid: SJ005485
- Mapcode Local: GBR 6J.FKZ5
- Mapcode Global: WH66N.F7RP
Location and coordinates are for the approximate centre of Afon Alwen within this administrative area.
Geographic features and populated places may cross administrative borders.