Located near Deloit, this bridge is the fourth crossing of the Boyer River along this route.
Originally built in 1900, the bridge originally consisted of three deck girder spans. However, the center span and west approach were replaced in 1961 due to flooding and channelizing. The entire bridge rests on concrete substructures. The structure was erected by Illinois Central company forces.
There are numerous similar bridges along the route. It also appears that the bridge was raised in 1961, and the piers are a combination of older and newer concrete.
Overall, the bridge appears to be in good condition. Since 1961, little alterations have been made to the bridge.
The author has ranked the bridge as being locally significant, due to the common designs.
The photo above is an overview.
| Upstream | CN Boyer River Bridge #3 |
| Downstream | CN Boyer River Bridge #5 |