The enclosure, roughly fifty metres in diameter, was already being documented as a circular feature when Ordnance Survey mappers came through in the nineteenth century, who recorded it then as a stand of trees. By the time a sketch plan and section were drawn in 1951, it appeared as a hachured circle, the conventional symbol for an earthen ring, with gaps noted in its north-western and south-western quadrants. Today, no visible trace remains at ground level.

The feature was known locally as a fort, which in an Irish context usually points to a ringfort, a type of enclosed farmstead common from the early medieval period, typically defined by one or more earthen banks and an enclosing fosse, or ditch. What makes this particular example quietly melancholy is the recorded reason for its partial disappearance. A note accompanying the 1951 survey, drawn from Ordnance Survey Field Memorandums, states plainly that a portion of the fosse was removed in making the old Powerstown Racecourse, which runs through it. The racecourse, in other words, physically cut through the ancient enclosure during its construction. A field boundary running roughly north to south appears to have further truncated what remained. The combination of these two intrusions, one agricultural and one sporting, reduced a structure that had survived for centuries to something detectable only through the faint outlines of old maps and the long memory of local place-naming.