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Ffestiniog Railway: relict sections south of Tanygrisiau is an industrial railway that survives as fragmentary earthworks and structural remains in the upland terrain of Merionyddshire, Wales. The railway was engineered to transport slate from the extensive quarries around Tanygrisiau, exploiting the steep Welsh landscape to move heavy materials downslope towards lower-lying distribution points. The relict sections preserve evidence of the civil engineering solutions required to traverse difficult terrain underlain by Ordovician to Silurian igneous bedrock, dominated by felsic intrusive rock that forms the challenging geological foundation of this region.
The railway's route, now largely abandoned, left its imprint on the hillside as cuttings, embankments and structural traces that reflect nineteenth-century industrial practice. These fragmentary remains are embedded within the moorland landscape where slate quarrying once dominated the local economy, and they demonstrate the integration of transportation infrastructure with extractive industry in upland Wales.
The site is protected as a scheduled monument under Cadw reference CN426, recognising its historical importance as a relic of Wales's slate-working heritage and its value as evidence of Victorian industrial engineering adapted to mountainous topography.
Ffestiniog Railway: relict sections south of Tanygrisiau is a scheduled monument protected by Cadw under reference CN426. View the official record →
Ffestiniog Railway: relict sections south of Tanygrisiau is an industrial railway that survives as fragmentary earthworks and structural remains in the upland terrain of Merionyddshire, Wales. It is designated a Scheduled Ancient Monument by Cadw under reference CN426.
Ffestiniog Railway: relict sections south of Tanygrisiau dates from the industrial period, and is classified as a railway. It is one of over 32,000 scheduled monuments protected across the UK.
Ffestiniog Railway: relict sections south of Tanygrisiau 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 CN426.
Several scheduled monuments lie within 10 km, including Settlements SW of Bryn Cader Faner (8.8 km), Llyn Eiddew Bach Ring Cairn I (8.9 km), Cefn Clawdd Ring Cairn (9.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Ffestiniog Railway: relict sections south of Tanygrisiau'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.
Ffestiniog Railway: relict sections south of Tanygrisiau stands on Unnamed Igneous Intrusion, Ordovician To Silurian, bedrock that formed in the Silurian. The rock here is felsic-rock.