The enclosure they recorded was modest, an embanked ring roughly fifteen metres in external diameter, sitting on a low north-south spur of ground with a stream running some thirty metres to the east. That combination, a slight elevation and a nearby water source, is exactly the kind of modest topographical advantage that made a site worth enclosing in the first place.

The term "fort" as used on early Ordnance Survey maps generally refers to a ringfort, the most common type of early medieval settlement monument in Ireland. These were typically circular areas enclosed by one or more earthen banks and ditches, used as farmsteads rather than military fortifications in any modern sense. The Corkeeran example, at fifteen metres across, would have been a small one, more a defended farmyard than anything grander. What makes it quietly notable is that it appears on no other mapping edition, suggesting the earthwork had already been reduced to near-invisibility by the mid-nineteenth century, surviving only long enough to be caught by the surveyors before disappearing entirely. Today the site is occupied by a house and farm buildings, the earthwork gone, its outline surviving only in that single cartographic record from nearly two centuries ago.