The river bank itself forms the fourth side of the enclosure, which means the fort was never fully enclosed by its own earthworks at all. Instead, the drop to the water did the work that a bank or wall would otherwise do, a practical arrangement that also left the site permanently vulnerable to the slow collapse of the ground beneath it.

The fort measures roughly 14.5 metres along its north-west to south-east axis and is defined by an inner bank and an intervening fosse, which is a ditch dug between two banks to add depth to a defensive line, along with a lower outer bank on the south-west and west sides. A possible entrance gap survives at the north, where the fosse has been filled in, and a second break appears at the west. What makes the interior particularly interesting is not the earthworks themselves but what sits within and around them. At the centre, right beside the eroding river scarp, there is a souterrain, an underground stone-lined passage or chamber typically associated with early medieval settlement in Ireland, often interpreted as a place of refuge or storage. About thirty metres to the north-north-east lies a bullaun stone, a large rock with one or more artificial cup-shaped hollows ground into its surface, the purpose of which is debated but which frequently appear in early ecclesiastical or ritual contexts. Roughly twenty-five metres to the north-west, there is a corn-drying kiln, a modest structure used to dry grain before milling, common across Ireland from the early medieval period onward.

The clustering of these features around a single small enclosure suggests a working agricultural and domestic complex rather than a purely defensive site. The souterrain eroding toward the river bank is a detail worth noting: the scarp is described as actively eroding, which means the archaeology here is not static.