Buried in the townland of Ballybrowney was a corn-drying kiln, the kind of structure that would have been unremarkable to any early Irish farming community but is now rare enough in the ground to warrant careful excavation.

The kiln, catalogued as structure G during the pre-construction dig, belongs to a type known as dumb-bell, named for the outline formed when a circular pit and a rectangular pit are joined together. A corn-drying kiln worked by channelling heat from a fire through a flue into a drying chamber above, where damp grain, often harvested in Ireland's reliably wet climate, could be dried before milling or storage. This example measured just over three metres in total length. The circular pit, the wider of the two chambers at around one and a half metres across, held a basal layer of intensely burnt clay mixed with charcoal, direct physical evidence of the fires that once dried the grain. Above that, both pits were filled with a dark, charcoal-rich silty sand, the accumulated residue of repeated use and eventual abandonment. The kiln did not stand in isolation; it sat roughly ten metres from one enclosure and about eleven metres from another, suggesting it was part of a small working agricultural complex rather than a solitary feature. Enclosures of this kind typically defined farmsteads or fields, and the proximity of the kiln to two of them points to a settlement that processed its own grain on site.