The entrance was recorded in 1984, already stopped up and inaccessible. Since then, it has effectively vanished from the visible landscape entirely, absent from Ordnance Survey historic mapping and undetectable on aerial photography.

The site sits on a ridge in hilly grassland, a position that would have made it well suited to a ringfort, the circular enclosed farmstead that was the standard unit of rural settlement in early Christian Ireland. Ringforts were often accompanied by souterrains, which were constructed beneath or just outside the enclosing bank. Whether any such enclosure ever stood here is unknown; none has been identified, and the souterrain itself survives only as a blocked threshold, its interior condition and extent a matter of guesswork. The fact that it does not appear on any historic Ordnance Survey maps suggests it was either already obscured by the time systematic surveying began in the nineteenth century, or simply overlooked by surveyors working across broad stretches of agricultural land.

What makes the Duneel souterrain quietly significant is precisely this combination of near-total invisibility and documentary fragility. A single description from 1984 is essentially all that anchors the monument to the record. The ridge it occupies continues to serve as ordinary farmland, offering no surface indication of what lies beneath.