Underground workings. One adit at top of incline open, leading to chambering and shaft to lower level. ***
Publications (5)
- (1991); CATMHS - Newsletter 031-November; 31 pages
- (1994); CATMHS - Newsletter 037-January; 29 pages
- (1998); CATMHS - Newsletter 053-April; 27 pages
- (1999); CATMHS - Newsletter 056-February; 28 pages
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Afon Deri - 565m- Abercorris (trial) - 728m
- Abercwmeiddaw - 892m
- Gaewern - 946m
- Pandy - 976m
- Braich Goch - 1,083m
- Corris Mine Explorers - 1,119m
- King Arthur's Labyrinth - 1,144m
- Tyn y Ceunant - 1,237m
- Matthews Mill - 1,410m
- Cwm y Hengae - 1,564m
- Ty'n y Berth - 1,599m
- Bryn Llwyd Uchaf - 1,724m
- Bryn Llwyd - 1,802m
- Tap Ddu - 1,918m
- Aberllefenni - 1,967m
