English: Borrodale viaduct. When built this was the longest unreinforced concrete span in the world and the finest example of Concrete Bobs work. Not only is it a massive span but it curves around at fair angle over a very deep gorge. As nobody seems to build in unreinforced concrete these days I assume it still is the longest single span in this material. It carried its first fare paying passengers on the 1st of April 1901. Not bad for an ex brickie. Sir Robert MacAlpine 1847 1934.
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== {{int:filedesc}} == {{Information |description={{en|1=Borrodale viaduct. When built this was the longest unreinforced concrete span in the world and the finest example of Concrete Bobs work. Not only is it a massive span but it curves around at fair