The church had already been in a sorry state well before the quarry arrived. The Ordnance Survey Letters, compiled in the nineteenth century, noted that it was "now destroyed," its foundations so overgrown with grass and weeds that the extent of the building could not be ascertained. The quarrying operation simply finished what centuries of neglect had started.

A rescue excavation carried out in 1985, the year after the quarrying, recovered possible wall-footings of a north-south running stretch of wall immediately east of the disturbed ground, which may represent a surviving fragment of the church structure. Sixteen metres to the north, a fosse, or boundary ditch, is still visible and could be the remnant of an Early Christian enclosure once associated with the church. Similar boundary features to the south are marked on the first edition Ordnance Survey six-inch map, though whether these represent an original Early Christian enclosure or later medieval and post-medieval field boundaries is uncertain. A graveyard lies immediately to the south, and a raised platform ringfort sits roughly 105 metres to the south-south-east on the same rising ground. The parish name, Kiltinahy, preserves the memory of the site in its Irish form: Cill tSinche, meaning the Church of St Sinech, a saint otherwise largely lost to the historical record.