The site consists of a nearly circular area, measuring approximately 34 metres north to south and 31 metres east to west, surrounded by a substantial water-filled moat or fosse. This defensive ditch varies in width from 6 to 9.5 metres at its top, narrowing to 3 to 6 metres at its base, with depths ranging from 0.5 to 1.2 metres on the interior side and 1.4 to 2.2 metres on the exterior. An earthen bank, now overgrown with vegetation, rises 1 to 1.5 metres high along the outer edge of the moat, adding an extra layer of fortification to this medieval earthwork.

The site underwent some modern alterations in 1988 when the interior was cleared and reseeded with grass, and a 4-metre-wide causeway was constructed at the south-southwest to provide access across the moat. Its strategic placement is particularly noteworthy; the remains of Boley tower house stand immediately adjacent to the southwest, suggesting this moated site may have served as an associated defensive outwork or earlier fortification. About 100 metres to the north lies the site of Lady’s Well, indicating this area held considerable importance in medieval times.

Archaeological historian Terry Barry has suggested this may be a ringwork castle, a type of fortification that emerged in Ireland following the Anglo-Norman invasion of the 12th century. These earthwork fortifications, consisting of a raised circular or oval platform surrounded by a ditch and bank, served as administrative and defensive centres for the new Norman lords. The presence of both the moated site and the nearby tower house suggests Boley was a significant settlement during the medieval period, with successive phases of fortification reflecting the changing military and social landscape of County Wexford.