The site appears on the 1938-39 Ordnance Survey map as an area enclosed by an earthen bank, measuring roughly 60 metres from north-northwest to south-southeast and 50 metres from east-northeast to west-southwest. Today, the location sits in a small, poorly drained hollow in the landscape, where a modern field drain may actually follow the original line of the western defensive ditch.

Moated sites like this one were a common feature of the Irish medieval landscape, particularly from the 13th to 14th centuries. They typically consisted of a rectangular platform surrounded by a water-filled ditch or moat, with the excavated earth piled up to form a defensive bank. These sites often housed the timber-framed halls and farm buildings of Anglo-Norman colonists or prosperous farming families who needed both status symbols and practical defences in medieval Ireland.

Whilst little remains visible at Powerstown today beyond the earthwork outline, these sites provide valuable insights into medieval settlement patterns in County Carlow. The Archaeological Inventory of County Carlow, first published in 1993, catalogued this and many other archaeological features across the county, helping to preserve knowledge of sites that might otherwise be forgotten as the landscape continues to change around them.