No walls survived, no wheel housing, no timber frame; just the stones themselves and the ghost of a headrace, the channel cut to divert water and build up the pressure needed to drive the mill, which appeared to extend some distance up the glen.

The site came to light in 1948, not through any deliberate excavation but during building work, when the discovery was reported to Cork Public Museum by G. Pennefather. A horizontal-wheeled mill, sometimes called a Norse or tidal mill in other contexts, is among the oldest mill types found in Ireland, operating by directing a jet of water onto a horizontal wheel set directly below the millstone, without the need for gearing. The fragments uncovered at Glenwood were noted as being similar to millstones found at Mashanaglass, a comparison recorded by Fahy in 1956, which suggests the site may belong to a broader pattern of early milling activity in the region. The glen itself, on the northern side of the Glencorra Stream roughly 120 metres northeast of its confluence with the River Funshion, would have offered exactly the kind of topography such a mill required: a narrow watercourse with enough gradient to generate the necessary flow.

The spot is now occupied by a disused electricity-generating station, a later industrial use of the same basic resource, moving water in a confined valley. The millstones, according to local knowledge, remain in the stream bed, unexcavated and largely undisturbed, sitting in the water just as the building work in 1948 left them.