Corn-drying kilns of this type were once a practical necessity of Irish agricultural life, used to dry cereal crops that would otherwise spoil in the damp climate before milling or storage. They are found widely across Ireland, but they survive mainly as earthworks or crop marks; to encounter one excavated, measured, and dated with precision is less common.

The Ballynamona kiln was aligned northeast to southwest and consisted of three connected elements: a circular bowl, roughly 1.2 metres in diameter, at the southwest end where grain would be spread to dry; a narrow flue running 2.4 metres in length; and a rectangular hearth at the northeast end, measuring 1.6 by 0.8 metres, where the fire was set. The heat generated at the hearth would travel along the flue and rise beneath the bowl, warming the grain above. Deposits of oxidised clay and charcoal-rich soil found at the base of the hearth and flue left little ambiguity about how the structure had been used. More precisely still, radiocarbon analysis of cereal grains recovered from inside the kiln returned a date range of AD 1058 to 1252, placing it firmly in the period between the late Irish early medieval world and the early decades of Anglo-Norman settlement in Munster. The excavation was reported by Cotter in 2006.

The site itself no longer exists in any visible form; it was uncovered and recorded during pre-construction archaeology and lies beneath the bypass route. What remains is the documentation of something that, in its working life, would have been entirely unremarkable to its users, a seasonal, utilitarian structure at the edge of a farming community. That ordinariness is precisely what makes it worth noting.