A series of old workings follow the vein, with shafts located both north and south of the road. One large shaft, documented as the Eryrys whim, remains north of Eryrys Crossroads at SJ 2040 5820. Another isolated shaft lies to the southwest, across the road, behind the village hall at SJ 2015 5805. These older workings are scattered among natural limestone outcrops.

At the western end of the vein, near Lot’s Farm, mining remains include two capped shafts from the 1978 Capping Programme by N.K.C. One shaft, at SJ 1993 5827, is accompanied by a large whim circle that forms a raised platform southwest of the farmhouse. Another, known as the ladder shaft (SJ 1984 5827), is located in a wooded area northwest of an adjacent coe (miners’ shelter).

The 1874 OS map marks the coe but not the ladder shaft.

The Blaen-y-nant Vein runs parallel to and south of the Belgrave Vein, cutting through Carboniferous Limestone. Mining activity along this vein dates back to the early 19th century, following an east-west course from Eryrys Crossroads to Lot’s Farm. By 1874, the Ordnance Survey map had no reference to a mine, so activity may have ended by then