This unique Double Intersection Warren Pony Truss crosses over the Union Pacific mainline in Mt. Vernon.
The bridge was built in approximately 1910 using a recycled pony truss span. It is unknown where this was originally located, although research is planned to answer the question.
In addition, the original build date of the bridge is unknown. It is likely that the only pieces of the original railroad bridge include the truss frame, which was likely built in the mid 1880s.
A number of bridges like this were constructed over double track mainlines for township and county roads. This bridge was built for the Lincoln Highway.
The main truss span is a heavily modified Double Intersection Warren Pony Truss with riveted connections.
This bridge is approached by wooden trestle, and is set onto wooden piers. These wooden piers are set on stone and concrete substructures.
Overall, the bridge remains in fair condition. Currently, this bridge is open for pedestrians. After being closed in 1996, the bridge reopened and was restored in 2001.
Historic photo of the bridge. Credit to PhotoLibrarian on Flickr, used with Creative Commons permission.
The author has ranked this bridge as being moderately significant, due to the unique history and design.
The photo above is an overview. It can be accessed from the road it carries.