The Pant-yr-hwch Vein was worked between the Glol Mine and the Brindigri Mine.

The early workings of the Glol Mine were located on a sett apparently half a mile to the west of Glol Farm (Smith 1921). Three shafts lie in the woodland running south from The White House at SJ 1170 7850, SJ 1170 7810, and SJ 1170 7790. Two additional shafts can be found on the farmland at SJ 1240 7860 and SJ 1270 7860.

To the east of the Maes Achwyfan crossroads, shafts remain in the vicinity of Buarth-y-wacco at SJ 1130 7880.

An adit level was driven south from Plas-Uchaf towards the Buarth-y-wacco Shaft.

Further south, the workings belong to the Garreg Mine.