The fence does not merely cross the mound; it actually incorporates burnt material within its construction, meaning that the physical remains of ancient activity have been folded, quite literally, into a piece of modern agricultural infrastructure.

Fulachtaí fia are low, horseshoe-shaped mounds typically found near water sources, formed over centuries of repeated use. The prevailing interpretation is that they were cooking sites: stones were heated in a fire, dropped into a trough of water to bring it to a boil, and the cracked, fire-shattered fragments were then discarded into a heap. Over time, those heaps of burnt and broken stone accumulated into the mounds we see today. The Knockatooan example sits on the northern bank of a stream, which fits this pattern precisely. Local information recorded that the mound once stood around 1.6 metres high, but was partly removed around 1964. What survives is a flat-topped mound on the western side of the fence, measuring roughly 17.7 metres by 14.3 metres and now only about 0.4 metres in height. To the east of the fence, the burnt material spreads out as a grass-covered scatter rather than a defined mound, the remnant of whatever was disturbed or displaced during the mid-twentieth-century reduction.