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Remains of Gamlyn Railway Viaduct is a post-medieval railway bridge situated in Wales, protected by Cadw as a scheduled monument. The viaduct was constructed to carry a railway line across the local landscape during the nineteenth or early twentieth century, a period of intensive railway development across Britain. The structure stands on bedrock comprising the South Wales Lower Coal Measures Formation, a Westphalian-aged sequence of mudstone, siltstone and sandstone interbedded with coal seams and ironstone, typical of the coalfield geology that shaped industrial development in South Wales.
The railway line would have served the local coal and iron industries that flourished in response to the underlying mineral wealth. The viaduct's survival, though now in ruins, reflects both the scale of Victorian and Edwardian engineering investment in the region and the subsequent decline of heavy industry in Wales. The remains are protected by Cadw under reference GM533, recognising the monument's historical importance as evidence of Wales's industrial heritage and the transport networks that supported nineteenth-century economic growth.
Remains of Gamlyn Railway Viaduct is a scheduled monument protected by Cadw under reference GM533. View the official record →
Remains of Gamlyn Railway Viaduct is a post-medieval railway bridge situated in Wales, protected by Cadw as a scheduled monument. It is designated a Scheduled Ancient Monument by Cadw under reference GM533.
Remains of Gamlyn Railway Viaduct dates from the post medieval/modern period, and is classified as a bridge. It is one of over 32,000 scheduled monuments protected across the UK.
Remains of Gamlyn Railway Viaduct 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 GM533.
Several scheduled monuments lie within 10 km, including Remains of Iron Furnace at Cwmaman (5.9 km), Twyn y Bridallt Roman Camp (6.9 km), Incline Haulage Systems, Cefn Ynysfeio, Treherbert (7.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Remains of Gamlyn Railway Viaduct'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.
Remains of Gamlyn Railway Viaduct stands on Pennine Lower Coal Measures Formation And South Wales Lower Coal Measures Formation (Undifferentiated), bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.