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Dolau-Hirion Bridge is a post-medieval to modern bridge located in Wales and protected by Cadw as a scheduled monument under reference CM005. The structure spans terrain underlain by Ashgill rocks, a foundation of mudstone, siltstone and sandstone formed during the Ashgill epoch of the late Ordovician period. This sedimentary bedrock, typical of mid-Wales geology, would have presented specific challenges and opportunities for the bridge's construction and long-term stability.
The bridge represents a phase of infrastructure development in Wales when improved communications became increasingly important. Built upon the varied but relatively coherent strata of Ashgill geology, the structure demonstrates the practical engineering responses to crossing a watercourse in challenging terrain. The monument's scheduling reflects its significance within the historic landscape of Wales.
Dolau-Hirion Bridge survives as evidence of post-medieval transport networks and construction techniques adapted to local geological conditions. Its protection by Cadw ensures the preservation of this element of Welsh heritage infrastructure and the archaeological understanding of how communities engineered crossings through the Welsh landscape.
Dolau-Hirion Bridge is a scheduled monument protected by Cadw under reference CM005. View the official record →
Dolau-Hirion Bridge is a post-medieval to modern bridge located in Wales and protected by Cadw as a scheduled monument under reference CM005.
Dolau-Hirion Bridge 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.
Dolau-Hirion Bridge 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 CM005.
Several scheduled monuments lie within 10 km, including Castell Waunberllan (6.2 km), Pen Caenewydd ring cairn (7.7 km), Tomen y Rhos round cairn (7.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Dolau-Hirion Bridge'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.
Dolau-Hirion Bridge stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.