Today, no trace of it can be found. The lake itself has shrunk since the surveyors passed through, and whatever once rose from the water has either subsided beneath it or been swallowed by the changing shoreline.

The island, around ten metres in diameter, was almost certainly a crannog, an artificial or partially artificial island dwelling constructed from layers of timber, stone, peat, and brushwood, typically built during the early medieval period in Ireland as a defensible homestead surrounded by water. Corrachoosaun Lough is a sub-triangular lake, roughly 600 metres east to west and 400 metres north to south at its widest, with its apex pointing south. By the time the lake was measured more recently, those dimensions had reduced slightly on the east-west axis, suggesting gradual drainage or land reclamation in the surrounding area. Whether the island was consumed by that same process, or whether it simply eroded and sank, is not recorded.