The remains measured just 1.1 metres by 0.85 metres, with a maximum depth of half a metre, making it a compact feature by any standard, yet its structure was coherent enough to read clearly. Two stones formed a lining, one on either side, and a crescent-shaped wall of solid iron slag, the glassy, dense by-product left behind when iron ore is smelted, completed the enclosure.

The excavation was carried out by archaeologist Breandán Ó Ríordáin as part of the Arklow bypass road scheme, under excavation licence 97E0083. No artefacts were recovered beyond fragments of slag and waste iron, which is not unusual for a site of this kind. A smelting or smithing furnace of this type would typically leave little behind other than the physical evidence of heat and metalworking residue. The crescent wall of slag is itself informative, suggesting the material had been deliberately shaped or had accumulated in a way that reflects repeated use. Without further finds or associated features, precise dating is difficult, but the construction method places it within a tradition of small-scale iron production that has a long history across rural Ireland.