M. R. Colhoun first recorded this subterranean feature, noting its position right at the boundary where cultivated farmland begins its gentle descent southward towards the waters of Trawbreaga Bay.

Souterrains like this one are artificial underground structures that were typically built during the early medieval period in Ireland, roughly between the 6th and 12th centuries. These enigmatic passages served multiple purposes for the communities that constructed them; they provided storage for valuable goods, offered refuge during raids, and maintained consistent cool temperatures ideal for preserving food. The Drung souterrain's location at the edge of arable land suggests it was likely connected to a farmstead or small settlement, though any above-ground structures have long since vanished.

The site was officially documented as part of the comprehensive Archaeological Survey of County Donegal, compiled by Brian Lacey and his team in 1983. This survey catalogued field antiquities spanning from the Mesolithic Period through to the 17th century, creating an invaluable record of Donegal's archaeological landscape. While many souterrains across Ireland have been explored and mapped in detail, others like the one at Drung remain relatively undisturbed, preserving their mysteries beneath the Irish countryside.