Roughly fifteen metres across and standing three metres high, it is the kind of feature that most people would walk past without a second thought, and yet historical maps marked it simply as a moat, which raises more questions than it answers. A moat in this context most likely refers not to a water-filled ditch but to a raised mound, the sort of earthen feature associated with early Norman fortification or enclosure, though the site has not been excavated and its precise origins remain unconfirmed.

The earthwork sits to the south-east of a nearby castle, recorded separately in the Sites and Monuments Record as DU011-011006. The two features are thought to be related, and the proximity of a named earthwork to a castle site is consistent with the kind of compound arrangement found elsewhere in the Dublin landscape, where a fortified tower or hall might be accompanied by outworks, enclosures, or raised platforms serving defensive or administrative purposes. At some point, a field boundary was cut through the southern edge of the mound, truncating it and making it harder to read its original shape. That kind of incremental agricultural damage is common across Ireland's earthwork record, where land division has quietly eroded features over centuries. The record was compiled by Geraldine Stout and updated by Christine Baker, with the entry uploaded in January 2015.

The site is currently fenced off and not accessible to visitors on foot. It sits within what is evidently a working or managed agricultural landscape at Castlefarm, and any visit to the surrounding area would involve viewing the mound from the field boundary rather than approaching it closely. The feature is modest in scale and unexcavated, so there is little to see beyond the mound itself, but for anyone with an interest in the Norman or medieval shaping of the Dublin countryside, the combination of the earthwork and the adjacent castle site gives the location a certain quiet density.