Measuring 5.5 metres east to west, 4 metres north to south, and standing 1.5 metres high, this oval feature contains some stone within its earthen construction. While it doesn’t appear on the 1836 Ordnance Survey 6-inch map, by the 1903 edition it was clearly marked as a circular hachured feature topped with a triangular trigonometrical symbol, suggesting its use as a surveying station during the late Victorian period.

The mound’s true origins remain uncertain; it may have been purpose-built as a trigonometrical station for the Ordnance Survey’s mapping efforts, or it could be an older feature that was later repurposed for surveying work. The presence of stone within the earthwork hints at possible earlier construction, though without excavation it’s difficult to determine whether this represents an ancient burial mound, a boundary marker, or simply a pile of field clearance stones that proved convenient for later surveyors.

Adding to the site’s archaeological interest is a hilltop enclosure located just 70 metres to the west-southwest, catalogued as DG011-047. This proximity suggests the summit of Crockaughrim may have held significance long before the Ordnance Survey arrived with their theodolites and chains. The mountain terrain would have provided commanding views across the surrounding landscape, making it an ideal location for both ancient territorial markers and modern mapping stations alike.