|This article is about the magazine story. You may be looking for the episode or the television series bridge.|
The Old Bridge is a magazine story.
Thomas sees Gordon covered in soot and dust from passing under an old bridge. When Thomas gets dirty after passing under the bridge, the Fat Controller sends some workmen to clean it. When the workmen discover a plaque which tells of the bridge's construction in the 19th century, the Fat Controller decides that the bridge deserves a special birthday.