CPAT Regional Historic Environment Record
The following information is from the on-line database 'Archwilio'.
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Cefn Mawr/Deborah

Primary Reference Number (PRN) : 18057
Trust : Clwyd Powys
Community : Gwernymynydd
Unitary authority : Flintshire
NGR : SJ20406350
Site Type (preferred type first) : POST MEDIEVAL LEAD MINE

Description :
Lead (1878-1901)

Geology
Carboniferous Limestone.

Workings
Documentary evidence in the form of early leases deposited at CRO, Hawarden and referred to in Williams (1987) affirm the small-scale workings in this area on land owned by the Grosvenors on Mold Mountain.

The Cefn Mawr Mine worked the Deborah Vein, a continuation of True Blue, which ran eastwards from the River Alun to meet the Cathole Cross-Course Vein. Working evidence remains as several very deep stone lined shafts, two substantially capped with metal cages in the area north-west of Cefn Mawr Hall.

The Deborah Shaft is located at SJ20606325 and to the west of this three large shafts, filled in and overgrown lie are located on the other side of the Cathole-Gwernaffield Road at SJ20606330.

Workings to the north have been lost to the Cefn Mawr Quarry.

Transport
No evidence.

Power
Probably whim shafts.

Processing
Smith (1921) refers to ores being carted to Pantybuarth (103203) for dressing.

Other features
A limekiln lies on the edge of an old stone wall boundary and gatepost at SJ20606340. An area of spoil and dump runs along this field boundary also.

Sources :
Clwyd Powys Archaeological Trust , 1993 , Site visit record - PRN18057

Events :

Related records

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 20, 2025, 12:32 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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