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Clwyd Metal Mines Survey
Cefn-yr-Ogof
Cefn-yr-Ogof lies in the community of Llanddulas and Rhyd-y-foel in the county of Conwy. It is located at Ordnance Survey national grid reference SH91507760. The mine is recorded in the CPAT Historic Environment Record as number 18037 and this number should be quoted in all correspondence.Lead (18th-19th century)
Geology
Carboniferous Limestone.
Workings
Two east-west lead veins cross the Cefn-yr-Ogof Hill and have been continuously worked fron quite an early period. Workings can be traced across the hillside from the Dulas valley to Gwrych Castle, beginning with the shafts at SH91607740, running eastwards
up the slopes and continuing through the Castle Woods to the fields of pasture, where the largest shaft mounds are located at SH92207730, SH99257730 and SH92607740.
A natural cave at SH91507795, to the west of Tan-yr-Ogof Farm, was later opened up by mining activity.
Transport
No evidence.
Power
No evidence.
Processing
No evidence.
Other features
No evidence.
This HTML page is reproduced from the Powys and Clwyd Metal Mine Surveys which were undertaken between May 1992 and December 1993 by Mark Walters and Pat Frost of the Clwyd Powys Archaeological Trust with financial support from Powys County Council, Clwyd County Council and Cadw: Welsh Historic Monuments. Further information about this site is available in CPAT's Regional Historic Environment Record.
Page produced by Rachel Stebbings and Chris Martin.