It has been catalogued, classified, and assigned coordinates, yet anyone who made their way there hoping to find a ridge of banked soil or the outline of a ditch would find nothing. The site survives only as a record, its physical form entirely gone from the landscape.

Earthworks of this kind, which might once have been enclosures, field boundaries, burial mounds, or defensive structures, are among the most vulnerable features in the Irish archaeological landscape. They leave no stonework to anchor them against the plough, the drainage scheme, or the slow creep of intensive farming. At Knockagh, whatever once broke the surface has been levelled completely, leaving the land looking like any other field in North Tipperary. The earthwork was recorded by Jean Farrelly and Caimin O'Brien in their archaeological inventory of the county, published in 2002, but even at that point the authors could note only its absence.