A togher is a trackway built across boggy or waterlogged ground, typically constructed from timber, branches, and other organic material. The Corlea example belongs to a class of togher notable for its engineered, layered construction rather than a simple scattering of branches, and what survives gives a rare glimpse into how people moved through landscapes that would otherwise have been impassable.

When first recorded, the exposed section measured 27.5 metres in length and 1.2 metres in width, with the structure running close to a drain shoulder and extending beneath a milled surface that rose toward the centre of the field. The construction is notably deliberate. Four longitudinal planks, ranging from 12 to 30 centimetres in width, formed the substructure; two were set closely together in the middle of the trackway, while the remaining two defined its outer edges. The gaps between the planks were filled with brushwood, and some of that brushwood had pressed down into the bog surface at roughly 45 degrees, suggesting the weight and traffic of use. Above this framework lay a superstructure of densely packed small and large brushwood laid lengthwise. Subsequent excavation complicated the picture somewhat, uncovering what may be a second, distinct togher on the same alignment, with larger brushwood pieces orientated north-east to south-west forming boundaries and an internal spine. A separate togher has been identified approximately 50 metres away, and the two structures may be related, perhaps different phases of crossing the same difficult ground, or parallel routes serving slightly different purposes.