CPAT Regional Historic Environment Record
The following information is from the on-line database 'Archwilio'.
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Siglenlas Mine

Primary Reference Number (PRN) : 8478
Trust : Clwyd Powys
Community : Llangurig
Unitary authority : Powys
NGR : SN86588390
Site Type (preferred type first) : MULTIPERIOD COPPER MINE / MULTIPERIOD LEAD MINE

Description :
Lead/Copper (Prehistoric ?/Roman ?/17th century-1868)

Geology
Silurian Frongoch formation mudstones. There are three lodes, the main vein striking SW-NE. The vein includes a quartz chalybite and calcite gangue with galena, sphalerite, and chalcopyrite.

Workings
There are a number of ancient opencuts on the lode displaying traces of copper mineralisation. Trials are also located on this lode. The main workings of the 18th and 19th century were carried on by means of a single shaft and 2 adits at SN86628397.

Transport
No evidence.

Power
In 1865 a waterwheel was used for pumping and crushing but was apparently unsuited to provide power to both. Traces of this wheelpit survive. The wheel was fed by a leat from a reservoir at SN85208470.

Processing
A rotary rake, 2 machine jiggers, and a crusher were present in the 1860s. The wall of a possible set of ore bins can be seen on the 1886 OS map to the east of the crusher.

Other features
No evidence.

Sources :
Bick, D E , 1977 , The Old Metal Mines of Mid Wales 4
Bick, D E , 1990 , The Old Metal Mines Of Mid-Wales
Clwyd Powys Archaeological Trust , 1983 , Site visit record - PRN8478
Clwyd Powys Archaeological Trust , 1995 , Site visit record - PRN8478
Foster-Smith, J R , 1978 , The Mines of Montgomeryshire and Radnorshire
Jones, J A & Moreton, N J M , 1977 , The Mines and Minerals of Mid-Wales
Jones, O T , 1922 , Lead and Zinc. The Mining District of North Cardiganshire and West Montgomeryshire
Ordnance Survey , 1886 , OS map
Thomas, D , 1998 , Hafren Forest Archaeological Assessment ( © Clwyd Powys Archaeological Trust)

Events :

Related records
CPAT Historic Environment Record (HER) 8478

Compiled date : 31-12-1995


Archaeological data, from the Historic Environment Record, supplied by The Clwyd-Powys Archaeological Trust in partnership with Local Authorities, Cadw and the partners of ENDEX © CPAT, 2025 (and in part © Crown, 2025). It is intended to be used for private research only and is not for use as part of commercial projects. If you wish to use this information for publication in printed or multimedia form or to compile resources for commercial use, prior permission must be obtained in writing. Use of this information is subject to the terms and conditions of access to HER data published on CPAT's website. Please contact the HER if you have any further questions regarding this information. Please quote the Primary Reference Numbers (PRNs) in any correspondence.

April 22, 2025, 5:56 pm - File produced for Archwilio from CPAT's Regional HER.
Clwyd-Powys Archaeological Trust, The Offices, Coed y Dinas, Welshpool, Powys, SY21 8RP
tel (01938) 553670, email her@cpat.org.uk, website www.cpat.org.uk

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