This particular one, sitting on the southern bank of a minor watercourse called the Monroe, might never have come to light at all had it not lain directly in the path of the M11 Gorey to Enniscorthy motorway. Topsoil monitoring in October 2016, during the motorway's construction phase, revealed two spreads of burnt stone roughly 80 metres apart, and what followed was a careful excavation of what turned out to be a genuinely ancient deposit.

Burnt mounds are among the more common prehistoric features found across Ireland, typically interpreted as the remains of cooking or heating activity, in which stones were fired and then dropped into a water-filled trough to raise the temperature. Over time, the spent, shattered stones were raked aside and accumulated into a mound. The Roperstown example, excavated in November and December 2016 by Turrell and Kavanagh, measured roughly seven metres east to west and three metres north to south, reaching a maximum depth of just 0.3 metres. No trough was found directly beneath it, though a small patch of heat-affected sand a few metres to the west may mark where a hearth once sat. A shallow pit about 25 metres to the east is the best candidate for a trough, and a sample of ash charcoal taken from it returned a radiocarbon date of 2296 to 2060 cal. BC, placing the activity here firmly in the Early Bronze Age. No artefacts of any kind were recovered, which is not unusual for sites of this type; the stones themselves, and the charcoal they left behind, are often all that survives.

The western spread was fully excavated and proved to represent the complete extent of the mound. A second, eastern feature extended beyond the road corridor and was not fully investigated, leaving one part of the Roperstown picture still, in a sense, unresolved beneath the Wexford scrubland.