NPRN287013
Map ReferenceSH55NW
Grid ReferenceSH5244056800
Unitary (Local) AuthorityGwynedd
Old CountyCaernarfonshire
CommunityBetws Garmon
Type Of SiteTRIAL MINE
PeriodPost Medieval
DescriptionA large sub-circular pit with a penannular upcast spoil heap that surrounds all sides except for that to the east. The upcast is c.7m wide and 2m high. The pit is 2.5m to 3m deep and 7m in diameter. It is shown on both the 1st Edition OS mapping and the RCAHMW Aerial Photographic Interpretation. P.J. Schofield, Oxford Archaeology North, 20th December 2005