A souterrain is an underground stone-built passage or chamber, typically associated with early medieval settlement in Ireland, thought to have served as a refuge, storage space, or means of concealed escape. This one was constructed using drystone technique, meaning the walls were built without mortar, relying entirely on the careful placement of stone upon stone.

The souterrain sits beneath the southern sector of the enclosing bank of a rath, a type of circular earthwork enclosure that functioned as a farmstead during the early medieval period. The full structure measured more than 7.3 metres in length along its north-south axis, extending outward beyond the external face of the bank. Of that length, only the northern chamber survives intact, measuring roughly 2.8 metres long and 1.8 metres wide. The southern section, which accounts for about 4.5 metres of the total, has collapsed inward, its former course now readable only as a depression filled with loose stone. What makes this site a little more unusual is that a second possible souterrain has been identified in the northern sector of the interior of the same rath, suggesting this enclosure may have had more than one such underground feature, though the second remains unconfirmed.