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Hafodlas Slate Quarry Mills and Associated Features is a post-medieval and modern water-powered industrial complex situated in Wales. The site exploits the Caradocian bedrock of mudstone, siltstone and sandstone that underlies the locality, geology particularly suited to slate extraction. The water-power system represents the industrial development of the Welsh slate industry during the 18th and 19th centuries, when such quarries expanded significantly to meet growing demand for roofing slate across Britain and beyond.
The monument comprises the mills and their associated infrastructure, designed to process and finish slate extracted from the quarry. Water-powered mills of this type typically used watercourses diverted through channels and leats to drive machinery for cutting, splitting and dressing slate. The arrangement of buildings, channels and water management features across the site reflects the practical engineering required to harness sufficient power for industrial production in a rural upland setting.
The site is protected as a scheduled monument by Cadw under reference CN295, recognising its archaeological and historical significance as evidence of Wales's slate-working heritage. The survival of the mills and associated structures provides material testimony to the technological adaptation and labour systems that characterised the post-medieval Welsh quarrying economy.
Hafodlas Slate Quarry Mills and Associated Features is a scheduled monument protected by Cadw under reference CN295. View the official record →
Hafodlas Slate Quarry Mills and Associated Features is a post-medieval and modern water-powered industrial complex situated in Wales. It is designated a Scheduled Ancient Monument by Cadw under reference CN295.
Hafodlas Slate Quarry Mills and Associated Features dates from the post medieval/modern period, and is classified as a water power system. It is one of over 32,000 scheduled monuments protected across the UK.
Hafodlas Slate Quarry Mills and Associated Features 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 CN295.
Several scheduled monuments lie within 10 km, including Pont y Pair (1.3 km), Fedw Deg Medieval House (3 km), Roman Bridge Penmachno (4.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Hafodlas Slate Quarry Mills and Associated Features'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.
Hafodlas Slate Quarry Mills and Associated Features stands on Caradoc Rocks (Undifferentiated), bedrock that formed in the Caradocian. The rock here is mudstone, siltstone and sandstone.