This bridge's main span came from the structure that preceded the current Grand Ledge Railroad Bridge. Peter Schierloh, who visited the bridge, explains below:
I have a set of plans for the 1887 Grand Ledge bridge that was sent to me by the railroad that currently runs over the Stronach Bridge. The 1887 bridge shown in the plans has the same configuration as the current bridge in Grand Ledge with three deck truss spans resting on steel towers, and deck girder approach spans. I suspect the stone piers and abutments at Grand Ledge probably date back to the original 1887 bridge. The Pere Marquette must have replaced the original 1887 iron spans with new riveted steel spans at Grand Ledge sometime prior to 1909. According to the plans I have, they took one of the three 1887 pinned trusses, and the two deck girder spans and moved them to Stronach in 1909. Included in the plans are drawings of a series of modifications (mainly strengthening of the lateral bracing and replacement of the floor system on the truss) made by King Bridge Company in April of 1909. There is no mention what happened to the other two trusses.
Mr. Schierloh was contracted to do repair work on this bridge, which suggests that CSX plans to continue using the rail line and bridge for the foreseeable future.
The bridge features v-lacing on the verticals, and deck plate girder approach spans. The bridge's supports and abutments are wooden.
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