The structures in question are toghers, a term for wooden causeways or pathways built across boggy ground, typically constructed from split or round timbers laid transversely across the soft terrain. They allowed people and animals to move through landscapes that would otherwise have been impassable, and they survive in bogs precisely because the waterlogged, oxygen-poor conditions that make such ground so treacherous are also extraordinarily good at preserving organic material across centuries or even millennia.

Several toghers were identified within an area roughly 165 metres north to south and 202 metres east to west. The Irish Archaeological Wetland Unit, based at University College Dublin, communicated the find and noted that at the time of recording, the toghers were actively being destroyed by peat milling, the industrial-scale harvesting of bog for fuel and horticultural use. It is a situation familiar from many Irish midland and lowland bogs, where the pace of extraction has repeatedly outrun the pace of archaeological recording. The flat bog at Ballybeg offered no surface indication that anything lay beneath; the post row element of the site suggests at least some of the structural timbers were set vertically, which can indicate the edge or reinforcement of a trackway, or possibly a separate phase of construction altogether.