Washington Avenue Bridge - Credit: Wikimedia Commons
The Washington Avenue Bridge is a historic lenticular truss bridge carrying Washington Avenue over the Mad River in Waterbury, Connecticut. Built in 1881, it is the oldest known surviving example of a lenticular pony truss bridge built by the Corrugated Metal Company, later known as the Berlin Iron Bridge Company, a prolific bridge maker in New England of the late 19th century. The bridge was listed on the National Register of Historic Places in 2001. Read more on Wikipedia
Source: en.wikipedia.org