Near Milltown in reclaimed pastureland, what was once a D-shaped earthwork, roughly 45 metres east to west and 30 metres north to south, now survives only as a curving earthen bank tracing an arc from west-southwest to northwest. The rest is gone, absorbed into the everyday business of modern rural life.

The enclosure was recorded on the first edition of the Ordnance Survey six-inch map, produced in Ireland during the 1830s, which captured many such features before agricultural improvement and development erased them from the landscape. Enclosures of this kind are generally associated with early medieval settlement, functioning as a ringfort or similar enclosed farmstead, a rath, where families lived, kept livestock, and defined the boundary between domestic space and the wider world. The D-shape is less common than the typical circular plan and may reflect the natural contours of the ground or a later modification to an earlier form. By the time the site was formally assessed, a bungalow had been built within the interior, and reclamation of the surrounding pastureland had removed whatever earthworks once completed the circuit.