The collapsed adit is beleived to be under the spoli tip created during construction of the Blaenau tunnel. The open adit has deep silt and is flooded.
CRoW land
Publications (2)
Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Richards, Alun John, (1999); The Slate Regions of North and Mid Wales and their Railways; Gwasg Carreg Gwalch; 0863815772
