Working from a coal drift, from the Llwynhelig Colliery (NPRN: 80622), which was operational in the 1920s. The drift was linked to the colliery by a tramway and is shown on the 3rd edition Ordnance Survey County Series mapping of 1920 (Glamorgan, sheet XI 5).

Photographed during aerial reconnaissance by RCAHMW on 12th September 2008.
L. Osborne, 4th January 2013.