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Pentreclwydau Colliery is a post-medieval and modern coal mine situated in Wales. The colliery was worked in the Pennine Middle Coal Measures and South Wales Middle Coal Measures formations, geological strata of Moscovian age that contain productive seams of coal interbedded with mudstone, siltstone and sandstone. The presence of ironstone and ferricrete within these formations provided additional mineral resources that could be exploited alongside coal extraction. The site represents the industrial development of Welsh coalfield resources during the post-medieval period and into modern times.
The colliery is now protected as a scheduled monument by Cadw under reference number GM537, reflecting its historical significance to Wales's industrial heritage. Such monuments preserve evidence of the mining technologies, working practices and landscape modifications that characterised coal extraction in the region. The geological setting determined the viability and character of mining operations here, with the sequence and quality of coal seams governing both the scale and duration of commercial activity at the site.
Pentreclwydau Colliery is a scheduled monument protected by Cadw under reference GM537. View the official record →
Pentreclwydau Colliery is a post-medieval and modern coal mine situated in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference GM537.
Pentreclwydau Colliery dates from the post medieval/modern period, and is classified as a colliery. It is one of over 32,000 scheduled monuments protected across the UK.
Pentreclwydau Colliery is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is GM537.
Several scheduled monuments lie within 10 km, including Carn Caglau cairn (4.8 km), Bryn Llydan Round Barrow (5 km), Camp 280m S of Melin Court Brook (5.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Pentreclwydau Colliery's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Pentreclwydau Colliery stands on Pennine Middle Coal Measures Formation And South Wales Middle Coal Measures Formation (Undifferentiated), bedrock that formed in the Moscovian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.