This circular mound, known locally as a mote, rises 4 metres above its surrounding fosse, with an overall diameter stretching 82 metres. The structure features a distinctive flat top and steeply sloped sides, characteristics typical of Anglo-Norman fortifications that dotted the Irish landscape during the medieval period.

What makes this particular monument especially intriguing is its sophisticated water management system, first documented by archaeologist M.J. O’Kelly in the early 1940s. Two trenches connect the circular fosse to the nearby River Camoge; one eastern channel that once drew water from the river to fill the defensive ditch, and a western outlet that returned the water via a connecting stream. Though these channels have long since silted up, their traces remain visible, revealing how medieval engineers cleverly incorporated the natural waterway into their defensive design.

Today, the mound’s impressive outline can still be clearly seen from above, as captured in aerial photographs taken by the Archaeological Survey of Ireland in 2003. While centuries of weathering have softened its edges, the monument continues to dominate the local landscape, offering visitors a tangible connection to the strategic importance of this location in medieval Limerick. The site serves as a reminder of how these structures weren’t merely military installations, but sophisticated engineering projects that harmonised with their natural surroundings.