Man-made underground passage in Balrobin

The following description is derived from both the published 'Archaeological Inventory of County Louth' (Dublin: Stationery Office, 1986) and the 'Archaeological Survey of County Louth' (Dublin: Stationery Office, 1991). In certain instances the entries have been revised and updated in the light of recent research. Date of upload/revision: 17 July 2007 Isolated Man-made underground passage, discovered during foundation trenching of house garden in 1980. Modern entrance appears to be close to the original one. A passage runs SE from the entrance (L 11.2m, Wth 0.6m-1m, H 0.8m). Four metres from the end of the passage there is a small chamber to the E, with constricted entrance, (Wth 0.5m, H 0.7m). This chamber is sub-circular (max. dims. 1.3m by 1.1m, H 1m). At the SE end of the first passage the width increases to 1.5m and a drop-hole in the floor gives access to a second passage, running at a lower level in a SW direction. The passage widens gradually to form a sub-circular chamber at the SW end. The overall length of passage and chamber is 8.6m (H 0.8m-1.7m). Maximum width of chamber 1.7m. The entire Man-made underground passage is drystone-built, of local greywacke slabs, with larger stones at the base of the walling.