Craigmore Viaduct Craigmore Viaduct The Craigmore Viaduct () is a railway bridge near Bessbrook, County Armagh, Northern Ireland, known locally as the 18 Arches. (OS Grid ref: Jo628). Near Newry railway station. The bridge was designed by John Benjamin Macneill, an eminent Irish civil engineer, with construction beginning in 1849 for the Dublin and Belfast Junction Railway. The bridge was formally opened in 1852. It spans the valley of Camlough River. The viaduct consists of 18 arches of 60 ft span, the highest being 126 ft, making Craigmore the tallest viaduct in Ireland. It is around a quarter of a mile long
Millau Viaduct Vinci Group specialising in prestressing. It installed the cable stays and put them under tension, while the prestress division of Eiffage was responsible for prestressing the pillar heads. The steel road deck, and the hydraulic action of the road deck were designed by the Walloon engineering firm Greisch from Liège, Belgium, also an information and communication technologies (ICT) company of the Walloon Region. They carried out the general calculations and the resistance calculations for winds of up to . They also applied the launching technology. The sliding shutter technology for the bridge piers came from PERI. The bridge's construction cost