- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°58'48"N 3°26'19"W
- Eastings/Northings: 303500, 343500
- OS Grid: SJ035435
- Mapcode Local: GBR 6L.JC60
- Mapcode Global: WH780.4CS6
Location and coordinates are for the approximate centre of Afon Alwen within this administrative area.
Geographic features and populated places may cross administrative borders.