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Powys Metal Mines Survey

Nant Gyrnant

Nant Gyrnant lies in the community of Llanwrtyd Wells in the county of Powys . It is located at Ordnance Survey national grid reference SN85804740 . The mine is recorded in the CPAT Historic Environment Record as number 18992 and this number should be quoted in all correspondence.

Copper/Lead (18th century/19th century)

Geology
A south-west striking lode with pyrite, chalcopyrite, galena and blende mineralisation.

Workings
An initial opencast working was extended at a later date with two winzes through the floor and an adit at the south-western extreme. This adit is now run in. Towards the summit of Banc Y Dinas there are surface trials and a shaft which are all run in. At SN86064736 another shaft can be seen. Another level into the northern side of the Nant Gyrnant can be seen at SN86034742.

Transport
There is some evidence of short tramway track beds out onto the spoil tips from adits and shafts.

Power
An intact manual winch and pump are still intact above one of the winzes in the bottom of the opencast adit.

Processing
Manual processing is evidenced by crushed rock concentrations and tailings.

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.