What emerged was not a straightforward story but a layered one, with the mound itself concealing evidence of activity from multiple periods. Amongst the finds was a copper-alloy brooch pin recovered from the edge of the mound, the kind of small personal object that tends to raise more questions than it answers about who was here and when.

The structure belongs to the category of ring barrow, a burial monument type typically consisting of a circular mound enclosed by a surrounding ditch or fosse. At Cooldrinagh, that enclosing fosse measured 0.7 metres wide and 0.25 metres deep, and it yielded flint flakes alongside modern pottery, an unsettling combination that hints at the site's long and complicated afterlife. When the mound material itself was removed, archaeologists encountered something older still: an earlier ditch containing cremated bone, pointing to funerary use that predated the visible mound. A funnel-shaped pit complex also came to light, producing iron slag and an unidentified iron object, suggesting that metalworking or some related activity had taken place on or near the site at some point. The excavation findings were reported by Mullins in 1996 and later compiled by Geraldine Stout.

The site sits within the broader Dublin landscape, though access and current ground conditions are not documented in the available records. Visitors interested in prehistoric funerary monuments in this part of Leinster should be aware that ring barrows are often low and unassuming at ground level, their profiles reduced by centuries of agricultural activity and, in cases like this one, by deliberate excavation. The finds from Cooldrinagh are the real measure of what was once here rather than anything visible above ground today.