One of the more mysterious bridges in Sioux Falls is located in Riverdale Park, crossing the Big Sioux River.
While its origin isn't completely clear, it is confirmed that it was built in 1888. Based on other Rock Island bridges, it seems possible that this structure was relocated to this location from somewhere in Iowa.
A number of these standardized Quadrangular Through Trusses were built on mainlines in Iowa during the 1880s. However, these mainlines would eventually be upgraded, and a number of bridges moved to other locations.
In fact, during the early 20th Century, it is approximated that 80% of Rock Island bridges would be relocated to other locations when they were replaced at their original locations.
However, there is no definitive evidence of this being the case of this structure. The only clue is the newer concrete piers, which either signified a new span at this location, or rebuilding older wooden piers.
Also, some strengthening of the bridge appears to have occurred, as seen on the bottom of the bridge.
Currently, the bridge features a large Quadrangular Through Truss. Typical of Lassig Bridge & Iron Works spans, this structure contains riveted connections and pedimented portal bracings.
In addition to the main span, the bridge is approached by trestle spans on either side. The truss is supported by concrete piers, while the approaches are supported by wooden bents.
Overall, the bridge remains in good condition. It's use as a trail should promise preservation for years to come.
The author has ranked this bridge as being moderately significant, due to the old age and possible relocation history.
The photo above is an overview. This bridge is easily accessed from the trail it carries.
| Upstream | Sertoma Park Trail Bridge |
| Downstream | Beadle Park Rail Bridge (E)/td> |