Located in the town of Rockton, this bridge features several pony truss spans to cross the Rock River.
Built in 1906, the bridge consists of four large 6-panel pin connected Pratt Pony Trusses. In addition, the bridge is approached by four deck girders on the north end and a single deck girder on the south end. The entire structure rests on concrete substructures.
The trusses of the bridge are of standard design. These types of trusses can be seen all around the Milwaukee Road system. However, these trusses are slightly larger than expected, possibly due to the later build date.
It is also possible that the trusses were actually fabricated earlier than 1906, possibly as far back as 1901 or 1902. However, there is no clear evidence to indicate this.
Overall, the bridge appears to be in good condition. This is the largest remaining such series of pin connected Pratt Pony Trusses on the Milwaukee Road system.
The author has ranked this bridge as being moderately significant, due to the truss design.
The photo above is an overview.
| Upstream | MILW Rock River Bridge |
| Downstream | Rockford Rail Bridge |