Three sides are formed by an earthen, stone-faced bank standing around 1.6 metres high, which has been absorbed into an existing field fence, while the eastern side is marked by nothing more than a slight ridge in the ground. That combination, a substantial constructed bank on three sides and a barely perceptible earthen trace on the fourth, is what distinguishes this from an ordinary agricultural boundary and places it in the company of early enclosures found throughout the Irish countryside.

Enclosures of this kind are a common but poorly understood feature of the Irish archaeological record. They range in date across a broad span of prehistory and the early medieval period, and their original purposes vary considerably. Some enclosed settlements, some defined ceremonial or ritual space, and others served functions that remain genuinely unclear. The earthen, stone-faced construction technique at Moneen, in which a core of compacted earth is reveted or stabilised with stone, is typical of a long tradition of enclosure-building in Munster. At 1.6 metres, the surviving bank height is modest but legible, and the fact that it has been incorporated into a later field fence rather than demolished is part of the reason it survives at all. Farmers working the same land across successive generations often found it easier to make use of existing earthworks than to remove them, which is one of the quieter ways the past stays visible in an Irish agricultural landscape.