Mining operations to the north have since been lost due to the expansion of Cefn Mawr Quarry.

Several deep stone-lined shafts remain in the area northwest of Cefn Mawr Hall, with two of the most substantial ones capped with metal cages. The Deborah Shaft is located at SJ 2060 6325, while three large, filled-in and overgrown shafts lie further west, across the Cathole-Gwernaffield Road at SJ 2060 6330.

A limekiln is present at SJ 2060 6340, positioned along the edge of an old stone wall boundary near a gatepost. A spoil heap and dump area run along this field boundary.

Documentary evidence, including early leases deposited at CRO, Hawarden and referenced in Williams (1987), confirms small-scale mining operations in this area, which was owned by the Grosvenors on Mold Mountain.

The Cefn Mawr Mine extracted ore from the Deborah Vein, a continuation of the True Blue Vein, which extended eastward from the River Alun before meeting the Cathole Cross-Course Vein. Mining in this area resulted in the creation of several deep, stone-lined shafts, some of which remain today.

Historical records suggest that ore from the mine was transported to Pantybuarth for processing (Smith, 1921).