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Gwernllwynchwyth Engine House is a post-medieval and modern industrial structure located in Wales, protected as a scheduled monument by Cadw under reference GM430. The engine house was constructed to serve the coal and iron extraction industries that dominated the South Wales valleys during the nineteenth and twentieth centuries. Built above geological strata of the South Wales Upper Coal Measures Formation, the site sits on bedrock composed of alternating layers of mudstone, siltstone and sandstone interspersed with coal seams, ironstone and ferricrete—deposits formed during the Westphalian period of the Carboniferous era.
The engine house represents the technological infrastructure essential to industrial mining operations in the region. Such structures housed the powerful steam engines that powered the pumping systems, winding gear and ventilation equipment required to work the deep coal seams beneath the South Wales landscape. The engine house's survival as a standing monument provides evidence of the industrial heritage and engineering practices that characterised Welsh coal and iron production during its peak period of extraction and exploitation.
Gwernllwynchwyth Engine House is a scheduled monument protected by Cadw under reference GM430. View the official record →
Gwernllwynchwyth Engine House is a post-medieval and modern industrial structure located in Wales, protected as a scheduled monument by Cadw under reference GM430.
Gwernllwynchwyth 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.
Gwernllwynchwyth 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 GM430.
Several scheduled monuments lie within 10 km, including Crymlyn Bog Second World War Barrage Balloon Site (3.5 km), Tir-Gwyllt Second World War Barrage Balloon Site (4 km), Earthwork on Kilvey Hill (4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Gwernllwynchwyth 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.
Gwernllwynchwyth Engine House stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.