The site is a fulacht fia, a type of prehistoric cooking or processing site found in enormous numbers across Ireland, typically identified by the characteristic horseshoe-shaped or oval mound of fire-cracked stone left behind after repeated use. The mound here is modest but measurable: roughly ten metres north to south, twelve metres east to west, and about half a metre high. On its western side there is a slight indentation that may mark where an opening once was, a remnant of the trough or working area where heated stones would have been dropped into water to bring it rapidly to the boil.

Fulachtaí fia (the plural form) are among the most common field monuments in Ireland, with thousands recorded nationwide, and most date to the Bronze Age, broadly between 2000 and 500 BC. The standard interpretation is that they served as cooking sites: stones were heated in a nearby fire, then transferred into a water-filled pit or trough, often timber-lined, to cook meat or other foodstuffs. Experimental archaeology has shown the method works efficiently. Some researchers have proposed additional uses, including textile processing or bathing, though cooking remains the most widely accepted explanation. The closeness of this example to a pond fits the pattern well; a reliable water source was essential to the whole operation, and Irish fulachtaí are consistently found near streams, springs, or standing water. A circular enclosure recorded separately lies about fifteen metres to the south-east, suggesting the area around Powerstown may have seen more sustained prehistoric activity than the quiet pasture now implies.