These structures, constructed by hand from dry-laid stone and roofed with large lintels, served various purposes depending on who you ask: cold storage, refuge, or a combination of both. They are found in their hundreds across the country, sometimes beneath the earthworks of a rath or ringfort, sometimes in apparently open ground with little surface trace remaining. The one at Blackpatch falls, for now, into a category that is frustratingly common in Irish archaeology: recorded, named, mapped, but not yet richly documented in any publicly accessible form.

The place-name Blackpatch itself is quietly suggestive, though its precise origin is difficult to pin down without further local or historical sources. Mayo has a dense concentration of souterrains across its landscape, particularly in areas that were well-settled during the early Christian period, and their distribution often follows patterns of agricultural land use and ecclesiastical influence. Without more detailed excavation records or historical documentation attached to this particular site, it is not possible to say when the Blackpatch souterrain was constructed, what condition it survives in, or whether it retains its original form underground. What can be said is that its existence was noted and classified, placing it within a broader tradition of subterranean architecture that speaks to the ingenuity and, possibly, the anxieties of early medieval rural communities.