It would be easy to drive past without registering what it actually is: a bivallate rath, meaning a ringfort defended by two concentric banks and ditches rather than the more common single ring. This double-circuit arrangement suggests that whoever built and occupied it considered extra protection worth the considerable effort of construction.

The structure is impressively engineered for something made of earth and gravel. The inner bank, flat-topped and largely composed of compacted earth and gravel, rises 1.75 metres on its external face and measures 4.5 metres across at its base. Between the two banks lies the fosse, a term for the defensive ditch, which here is flat-bottomed, nearly five metres wide, and drops 1.4 metres from the crest of the outer bank. That outer bank is lower and narrower, rising to around 0.8 metres externally with a basal width of roughly three metres. The interior of the rath measures approximately 22 metres north to south and 21 metres east to west, a reasonably generous enclosure of the kind that would typically have housed a farmstead of some local standing during the early medieval period, roughly the fifth to twelfth centuries. A causeway about 2.8 metres wide crosses the fosse at the north-west, and this may well mark the original entrance point, the place where a timber gate once stood. A modern wall along the south side of the road has been built directly over the north-eastern section of the bank, quietly absorbing part of the ancient perimeter into contemporary infrastructure.