The evidence they left behind is modest, even by the standards of its type, but it is evidence nonetheless of a practice repeated thousands of times across the Irish landscape over several millennia. A fulacht fia, to give it its Irish name, is essentially an ancient cooking or heating site: a trough, usually wood-lined or cut into the ground, filled with water and brought to temperature by dropping stones heated in a nearby fire into it. The stones fracture with repeated use and accumulate in a characteristic horseshoe-shaped mound of burnt, shattered rock. These sites are among the most commonly recorded prehistoric monument types in Ireland, yet each excavation tends to yield its own particular details.

At Barnageeragh, excavation carried out under licence number 06E0477, ahead of a development programme, uncovered a thin deposit of burnt mound material that had been deposited onto a single large pit, irregular in plan. The lower fills of that pit were waterlogged, a condition that sometimes aids preservation of organic material. Among the finds recovered were fragments of flint and animal bone, both consistent with the general picture of Bronze Age activity at such sites. A number of associated pits were also identified. The findings were recorded by Corcoran in 2009, and the site notes were compiled by Christine Baker and uploaded in February 2015. The deposit being described as thin suggests that activity here may have been limited in duration or intensity compared with larger, more frequently used fulacht fia sites elsewhere.

There is nothing to see at Barnageeragh today in the conventional sense. The site was excavated in advance of development, meaning the archaeology was investigated, recorded, and removed before construction proceeded, which is standard practice under Irish planning and heritage regulations. For anyone interested in fulachtaí fia more broadly, the National Museum of Ireland holds material from excavations across the country, and a number of reconstructed examples exist at heritage centres, giving a clearer sense of the original form. Reading the published excavation report by Corcoran remains the most direct way to engage with what was actually found here.