It sits just 0.22 metres deep at its recorded extent, spread across roughly 21 metres from north to south, and it would have been shallower still had later farmers not levelled it down for agricultural use. Yet this modest feature is a fulacht fia, a type of prehistoric burnt mound found in considerable numbers across Ireland, typically associated with the heating of water by dropping fire-heated stones into a trough. The stones crack and shatter with repeated use, and the discarded fragments accumulate into the distinctive mound that survives. What makes the Kilfinny example quietly interesting is that the excavation evidence pushes against the most familiar explanation for these sites.

The site came to light in 2002 during monitoring work by archaeologist Emer Dennehy, carried out as part of topsoil-stripping along Section 3 of a Bord Gáis Éireann pipeline running from Goatisland in Co. Limerick northward to Gort in Co. Galway. Infrastructure projects of this kind have been responsible for uncovering a significant number of previously unrecorded archaeological sites across Ireland, and this was one of them. Dennehy identified three separate phases of activity. The first involved two troughs dug into the ground, one roughly 1.7 metres by 1.4 metres, the other somewhat smaller, along with three circular pit features interpreted as pot-boilers, the largest measuring 1.3 metres by 0.9 metres. The second phase produced a single longer, narrower trough, around 2.5 metres by 0.7 metres. A third and later phase consisted of two drainage cuts that crossed the south-eastern edge of the site, both of which had accumulated burnt limestone through slippage from the mound above. Crucially, the volume and distribution of the burnt limestone in the trough fills led Dennehy to conclude that neither the Phase I troughs nor the Phase II trough had been used for cooking food. The pot-boilers, which contained a mix of sandstone and limestone, appeared to have been used for sustained heat generation of some other kind, though the record does not specify what that purpose may have been.

Because the site was identified during pipeline monitoring rather than through a formal excavation programme targeting a visible monument, there is little to see at ground level today. The mound material is largely dispersed, and the landscape around Kilfinny gives no obvious indication that anything of note lies beneath. For anyone interested in the archaeology of this period, the excavation report is accessible through the excavations.ie database, where Dennehy's findings are recorded under licence number 02E0559. The site is most usefully understood as part of a wider pattern of Bronze Age activity in the Irish midlands and west, revealed largely through the kind of developer-led monitoring that became standard practice in Ireland from the 1990s onward.