Preserved in fen peat along the sloping eastern bank of a mudflat creek south of Carrigadirty Rock, the posts were never recorded on any Ordnance Survey historic map, meaning they passed entirely unnoticed by the cartographers who documented the Irish landscape over generations. That absence alone makes them worth pausing over.

The site was identified in July 1996 and catalogued by archaeologist Aidan O'Sullivan in 2001, listed under the designation 'Carrigadirty Rock 4'. O'Sullivan recorded three posts in total: two roundwood examples, meaning they were fashioned from whole branches or small trunks rather than split timber, lying horizontally in the peat, and a third that had been driven into the ground at an angle. That third post is the detail that lingers. It had been cleft, meaning worked by splitting rather than sawing, on four surfaces and shaped to a sharpened point, suggesting deliberate preparation for driving into soft ground. Fen peat, which accumulates in waterlogged, low-lying areas fed by mineral-rich groundwater, creates anaerobic conditions that can preserve organic material for centuries or even millennia, which is why wood that would otherwise rot long ago can survive here. The purpose of this small cluster of posts remains unresolved; they could relate to fishing, to a landing point, to some kind of boundary marker, or to something else entirely. A pit recorded approximately 48 metres to the east adds further texture to the immediate area without clarifying the picture.

The site sits in the intertidal zone of the Shannon estuary, roughly 80 metres east of Carrigadirty Rock and about 160 metres north of a flood relief embankment, in the townland of Newtown within the barony of Pubblebrien, County Limerick. Access to intertidal peatlands of this kind is governed by tidal conditions, and the exposed surfaces where such features appear are only visible at low water. The ground is soft, the terrain unmarked, and there are no facilities or signage. Anyone with a serious interest in the site would do well to consult the Archaeological Survey of Ireland database entry and cross-reference tidal tables before making the journey out to the estuary edge.