- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°55'36"N 4°1'1"W
- Eastings/Northings: 264500, 338500
- OS Grid: SH645385
- Mapcode Local: GBR 5V.MNN5
- Mapcode Global: WH55N.8PBM
Location and coordinates are for the approximate centre of Llyn Tecwyn Uchaf within this administrative area.
Geographic features and populated places may cross administrative borders.