Hen Gloddfa or Hen Chwarel SH765101 Open adits at level 4 and 5. Llwyngwern SH757045 Open quarry with some underground work. Drainage tunnel accessible. SH787119 Mainly underground working. A number of adits.
Site is in coniferous forest.
Remains of incline and winding house. Lower adit has been visited. A 800' long adit leads to the base of 3 to 4 large, square bore shafts about 40' high. These are presumed to enter the chambered workings. Purpose of the shafts presumed to be for dumping waste for removal, unless there was some mechanism for lowereing slate produce in a controlled manner.