A quarry on the flat top of Craig Cwm Oergwm. It is shown on the 1st edition 1:10560 Ordnance Survey map of 1890-91 as an area of spoil but not named as a quarry. Shelters NPRN 246253 and 246255 were built within the area of the quarry. J.J. Hall, Trysor, 13 October 2008.