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Annell Aqueduct (lower section) is a Roman aqueduct located in Wales and protected by Cadw under reference CM210. The structure survives as a substantial engineering work designed to convey water across the landscape, typical of Roman infrastructure projects throughout the empire. Built in stone, the aqueduct demonstrates the Romans' sophisticated understanding of hydraulic engineering and their capacity to undertake large-scale construction in remote territories.
The monument sits upon Ashgill Rocks, an undifferentiated deposit of mudstone, siltstone and sandstone formed during the Ashgill period. This geology would have presented specific challenges to Roman builders, who needed to establish secure foundations for their masonry work whilst managing water flow across varied ground conditions. The lower section visible today represents the surviving portion of what was originally a more extensive system.
As a protected monument under Cadw's stewardship, Annell Aqueduct remains significant evidence of Roman Wales and the economic networks that such infrastructure supported. Water supply systems of this scale were essential to Roman settlement and industrial activity, serving forts, towns and agricultural operations. The aqueduct's survival offers insight into both Roman engineering practices and the landscape of Roman Wales during the occupation period.
Annell Aqueduct (lower section) is a scheduled monument protected by Cadw under reference CM210. View the official record →
Annell Aqueduct (lower section) is a Roman aqueduct located in Wales and protected by Cadw under reference CM210.
Annell Aqueduct (lower section) dates from the roman period, and is classified as a aqueduct. It is one of over 32,000 scheduled monuments protected across the UK.
Annell Aqueduct (lower section) 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 CM210.
Several scheduled monuments lie within 10 km, including Dolaucothi Gold Mines (1.1 km), Nantiwrch round barrow (3.7 km), Nant Cilgwyn standing stone (3.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Annell Aqueduct (lower section)'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.
Annell Aqueduct (lower section) stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.