- 1859: 57 miles completed from Janesville to Fond du Lac, Wisconsin by the Chicago & North Western Railway
- 1862: 65 miles completed from Fond du Lac to Fort Howard (Green Bay), Wisconsin by the Chicago & North Western Railway
- 1985: Route abandoned between Fond du Lac and Clyman and purchased for trail development
- 1988: Fond du Lac to Green Bay segment sold to Fox Valley Western Railway
- 1988: Fond du Lac to Green Bay segment sold to Fox Valley Western Railway
- 1993: FV&W purchased by Wisconsin Central, Ltd
- 1995: Chicago & North Western purchased by Union Pacific Railroad
- 1998: Janesville-Fort Atkinson segment abandoned
- 2001: Canadian National Railway acquires Wisconsin Central, Ltd
- 2003: Line through Fond du Lac abandoned
- 1989-Present: Clyman-Fond du Lac segment is used by Wild Goose State Trail
- 1995-Present: Union Pacific operates the line from Clyman to Fort Atkinson as the Clyman Industrial Lead
- 2001-Present: Canadian National operates the line between Fond du Lac and Green Bay as the Fox River Subdivision
10/25/22
The bridge crossing River Street on the Union Pacific and Wisconsin & Southern was a joint effort project between the Milwaukee Road and C&NW. In addition, the C&NWs mainline towards Evansville and Janesville split away at a 45 degree angle on this bridge, sharing abutments.
Built in 1925 to replace an earlier bridge, the structure consists of a single deck girder span, set onto stone abutments. It is currently unknown if all three tracks were built at the same time, as they have slightly different details. The 1925 plaque was only found on the northernmost (Union Pacific) track.
Overall, the bridge appears to be in fair to poor condition. A trio of tracks were constructed for this bridge, two of which are still in use.
In late 2021, it was announced five WSOR bridges would be rehabilitated or replaced using public funds in Janesville. It is believed that this is one of the five, and it is unknown if the bridge will be rehabilitated or replaced.
The author has ranked this bridge as being locally significant, due to the common design.
The photo above is an overview. The bridge can be accessed from the road it crosses.