This bridge is one of two IAIS bridges across the Rock River here. Both these are part of Vandruff Island.
Built in 1884 this bridge consists of three riveted Quadrangular Through Truss spans, set onto concrete substructures. Unlike the southern bridge, the northern bridge spans were originally built here. Since the 1884 construction, the bridge has been updated with concrete substructures and strengthened trusses.
This bridge currently consists of three 155' spans, set onto concrete substructures. It is possible that these substructures have stone components underneath. It is known that the bridge was strengthened in 1929, likely with a new floor.
While the builder of the bridge is assumed to be Lassig Bridge & Iron Works, this has not yet been confirmed.
The author has ranked this bridge as being regionally significant, due to the old age.
The photo above is an overview.
| Upstream | IAIS Rock River Bridge |
| South Channel | Vandruff Island Railroad Bridge (S) |
| Downstream | Confluence with Mississippi River |