Man-made underground passage in Marshes Upper

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 Excavated by M. Gowen in 1982 in advance of construction work. The site consisted of two Man-made underground passages within an oval enclosure (diam. 40m by 60m) (LH007-139----). The first Man-made underground passage (LH007-083----) T-shaped in plan, consisted of a passage (L 11m, Wth 1.1-5m) running W from the original rock-cut ramp entrance at the E. At the W end of the passage is gallery (L 18m, Wth 1.3-1.7m) ran S and another section of the same gallery (L 10m, Wth 1.6-2m) ran NW. The second Man-made underground passage (LH007-084----), roughly U-shaped in plan, consisted of a simple passage (L 25m, Wth 0.6-1m, H 1.4-1.6m) curving gently N-WSW.