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Ty Mawr East Slate Quarry Winding Engine House is a post-medieval and modern industrial structure located in Wales, built to serve the mechanical demands of slate extraction. The engine house operated a winding mechanism essential to quarrying operations, hauling slate and spoil from the depths of the excavation. Such structures represent a significant phase in Welsh industrial heritage, reflecting the adoption of steam and mechanical power in what had previously been labour-intensive quarrying work.
The site sits upon Upper Cambrian bedrock, specifically Tremadoc strata consisting of interbedded sandstone and conglomerate deposited during the Tremadocian epoch. These geological foundations shaped both the quarrying enterprise and the practical engineering of the site, as quarrymen exploited the exposed slate horizons whilst the underlying bedrock provided stable ground for the heavy machinery.
The engine house is now protected by Cadw, the Welsh heritage monuments authority, under reference CN300. This designation recognises the structure's importance as evidence of Wales's industrial past and the technological developments that transformed slate extraction during the nineteenth and twentieth centuries. The remains at Ty Mawr East stand as a testament to the mechanisation of the quarry industry and continue to illustrate the relationship between geology, industry, and engineering heritage in the Welsh landscape.
Ty Mawr East Slate Quarry Winding Engine House is a scheduled monument protected by Cadw under reference CN300. View the official record →
Ty Mawr East Slate Quarry Winding Engine House is a post-medieval and modern industrial structure located in Wales, built to serve the mechanical demands of slate extraction. It is designated a Scheduled Ancient Monument by Cadw under reference CN300.
Ty Mawr East Slate Quarry Winding Engine House dates from the post medieval/modern period, and is classified as a engine house. It is one of over 32,000 scheduled monuments protected across the UK.
Ty Mawr East Slate Quarry Winding Engine House 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 CN300.
Several scheduled monuments lie within 10 km, including Llystyn Gwyn Inscribed Stone (7.2 km), Huts and Enclosures, Cwm Llefrith (7.7 km), Huts and Enclosures above Ceunant y Ddol (8.1 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Ty Mawr East Slate Quarry Winding Engine House'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.
Ty Mawr East Slate Quarry Winding Engine House stands on Upper Cambrian, Including Tremadoc, bedrock that formed in the Tremadocian. The rock here is sandstone and conglomerate, interbedded.