The lintels span a total of three metres and mark what appears to be a northwest-to-southeast oriented souterrain, one of the stone-lined underground passages that were constructed throughout early medieval Ireland, most likely for storage or refuge. What makes this particular example quietly compelling is where it sits: not beside a rath or a ruined church, but dug directly into a midden, an ancient refuse heap, the accumulated domestic waste of people who lived and ate here long before the souterrain itself was built.

The deliberate choice to cut into an existing midden is the detail that lingers. Middens, composed of shell, bone, ash, and organic debris, build up slowly over generations of occupation, and the presence of one here speaks to a long, layered history of human activity on this small rise of ground. Whoever constructed the souterrain was working within a landscape already dense with the remains of earlier habitation, and may well have known it. The passage walls are lined with rubble stone, and while the lintels remain visible at the surface, the interior is partially blocked with fallen stone and impossible to access. The site was identified by M. A. Timoney, whose observations brought attention to the midden connection.