This beautiful truss bridge was built in 1899, during the line construction. However, it was not built at this location initially.
The original bridge at this location was a simple pile trestle. Approximately 1/5 of a mile east, a three span through girder bridge (2-45 foot spans and a 91 foot span) crossed the Boyer River.
In 1948, the Boyer River was rerouted to include a new crossing at this location. During the following two decades, the Boyer River was largely channelized, and several crossings eliminated.
Currently, this bridge features a single Pratt Through Truss main span. This span features pin connections and 5 panels.
In addition, the bridge is approached by Through Girder spans and trestle on either side. The substructures of the bridge consist of both concrete and timber.
It is believed the truss was originally constructed at Ascot, Iowa; approximately 50 miles west. A bridge there consisted of two 45' through girders and a 128'8" truss. This span was replaced in 1947.
At the current location, the truss is 126'8" long. An inspection of the bridge revealed the bridge was cut down by approximately two feet on each end. The two through girder spans were undoubtedly also built 1899, but may have come from either the former Boyer River crossing, the Ascot Bridge, or any other bridge along the route.
Overall, the bridge appears to be in good condition. The truss appears to be well maintained.
The author has ranked the bridge as being regionally significant, due to unique truss and relocation history.
The photo above is an overview.
| Upstream | CN Boyer River Bridge #4 |
| Downstream | UP Boyer River Bridge #1 |