Archaeologists Unearth Medieval Ringfort and Bronze Age Artifact During Dublin Drainage Project
Archaeologists have uncovered a medieval ringfort and an early Bronze Age flint scraper during preparatory work for the Greater Dublin Drainage (GDD) project in Abbotstown, County Dublin, according to Uisce Éireann. The findings, revealed ahead of a major infrastructure initiative, offer new insights into the region’s ancient history.
Ringfort Dates to Early Medieval Ireland
The ringfort, identified at Sheephill in Abbotstown, is a typical early medieval enclosure dating from AD 600 to 900, according to project archaeologist Derek Gallagher. These structures served as family homes, farmsteads, and livestock enclosures, providing a window into life over a millennium ago. Gallagher noted that geophysical surveys and test trenching uncovered the circular remains beneath the surface.
“Discoveries like this provide a fascinating glimpse into how people lived in this area over a thousand years ago,” Gallagher said, emphasizing that the excavation creates a permanent record of Abbotstown’s history.
Bronze Age Artifact Added to Findings
An early Bronze Age flint hollow scraper was also found during the investigations. While details about its use or significance were not specified, the artifact highlights the site’s long history of human activity. All recovered items will be archived at the National Museum of Ireland, with records stored in the National Monuments Service Archive.
Infrastructure Project Aims to Serve 500,000 Residents
The GDD project, designated critical national infrastructure under the Critical Infrastructure Act 2026, seeks to provide wastewater treatment for approximately 500,000 people and support up to 185,000 new homes across north Dublin and surrounding areas. The initiative includes a regional wastewater treatment facility, an orbital sewer network, and a marine outfall to the Irish Sea.
Dermot Bruton, Programme Manager with Uisce Éireann, stated that archaeological investigations ensure heritage is preserved before construction begins. “Protecting Ireland’s archaeological heritage is an important part of how we deliver major infrastructure projects responsibly,” he said.
Local Groups Engaged in Site Visits
Members of the Blanchardstown and Castleknock History Society and the Clonsilla & Porterstown Heritage Society visited the site to inspect the discoveries. Christine Moore of the Clonsilla & Porterstown group expressed surprise at the unfamiliar history, noting the care taken by archaeologists to preserve findings. “It’s fascinating to see the hard work they go through to find the tiniest of things and bring history back to life,” she said.
The project obtained an archaeological excavation licence from the National Monuments Service prior to preparatory works, ensuring investigations adhere to professional standards.
Next Steps for the Project
The GDD project is expected to continue progressing as planned, with archaeological work concluding before construction begins. officials emphasized that heritage preservation remains a priority.