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

Primary Reference Number (PRN) : 102802
Trust : Clwyd Powys
Community : Gwernymynydd
Unitary authority : Flintshire
NGR : SJ22206240
Site Type (preferred type first) : POST MEDIEVAL LEAD MINE / POST MEDIEVAL SILVER MINE

Description :
Lead/Silver (1858-1861)

Geology
The Fron Issa Vein runs off the Cathole Vein in an area of Cefn-y-fedw sandstone.

Workings
Remaining evidence of shaft workings consist of at least one very large shaft at SJ22206235, lying in the woodland across the road from the structures. Three shafts shown on the 1st edition OS map for Fronissa were apparently blasted out when the road was made.

Transport
No evidence.

Power
Coal ash slag in the vicinity of the chimney corroborates the evidence of the engine. The substantial stonework remains adjoining the chimney are supported by buttresses.

The stonework chimney remains to full height, with two opposed flues.

An 1861 Mining Journal lists a 56" pumping engine working on site with two 30ft x 6ft boilers together with two horse whims.

Processing
A set of three ore bins lie to the south of the engine house, they remain fairly intact; one with its portal remaining. A washing/picking platform lies to the north of the bins.

Other features
A revetment wall runs below the roadway enclosing the site. A short inclined trackway leads to the engine/dressing floor area.

A derelict house at SJ22046230 could be a possible mine office, being on the edge of the sett.

Also known as the Owain Glyndwr Mine

Sources :
Clwyd Powys Archaeological Trust , 1993 , Site visit record - PRN102802

Events :

Related records
CPAT Historic Environment Record (HER) 102802

Compiled date : 31-12-1982


Images :



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.

June 9, 2025, 6:36 am - 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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