The arc, with a maximum chord of around 4.5 metres, is modest in scale, but its survival, and the careful path of large flat stones connecting it to the entrance of the enclosure, suggests something deliberately and thoughtfully arranged rather than incidentally left behind.

A rath is a roughly circular earthen enclosure, typically dating to the early medieval period in Ireland, and generally understood as a farmstead surrounded by a bank and ditch. In 1950, archaeologists Seán P. Ó Ríordáin and Máire Mac Dermott excavated this particular site and found the stone arc within the rath's interior, interpreting it as the possible wall-footings of a circular house. The causeway leading from the structure to the rath entrance is a detail that lingers; flat stones laid with evident purpose, forming a link between the domestic interior and the wider enclosure, suggest the everyday routines of whoever once lived here, moving between house and gate across that laid stone path.