A fulacht fia, the term given to these ancient burnt mound sites found across Ireland, typically consists of a horseshoe-shaped mound of fire-shattered stone accumulated beside a trough into which water was heated by dropping in fire-heated rocks. They are among the most common prehistoric monuments on the Irish landscape, yet the detail preserved at this particular site gives an unusually clear picture of how such a place was actually built and used.

The site was excavated in 2006 ahead of road improvements along the M8/N8 Cullahill to Cashel scheme. Beneath a spread of burnt material measuring just over twelve metres north to south and nearly nine metres wide, excavators found two distinct timber-lined troughs cut into the ground. The first was rectangular, with vertical sides and a flat base, measuring 1.7 metres long and 1.4 metres wide, with post-holes at each corner and stake-holes beside three of them, suggesting a light timber structure once stood above or around it. A timber sample from this trough was radiocarbon dated to between 1010 and 830 cal BC, placing its use firmly in the late Bronze Age. The second trough, slightly larger and positioned to the west, had sloping sides and a bowl-shaped base, and was filled with peat, occasional stones, and timber. A small oval feature defined by stake-holes lay just to the west of both troughs; its purpose remains unclear. Roughly twenty metres to the east, a second fulacht fia was uncovered during the same excavation programme, suggesting this wetland margin was a place of repeated or concurrent activity rather than a single isolated episode.