This historic bridge has been found officially eligible for listing in the National Register of Historic Places. While the reasons might not be apparent to a casual viewers, bridge historians will immediately see why this bridge is an important piece of transportation heritage: for a bridge of its size and type it has a lot of complexity and it is also unaltered. The bridge retains historic integrity including original ornamental railings. The superstructure is a concrete slab design, but the spans are variable depth giving each span a slightly arched appearance. The bridge's chief technological significance comes from its configuration. This is a bridge that is quite curved, and has super-elevation to compensate for this, and also has a 4% grade. These features introduce considerable complexity into the bridge design. Click on the overview drawing above for a copy of the first page of the original bridge plans and you can see all the notations that were needed to define the curve, super-elevation, and grade.
The historic Red Wing Bridge is immediately northwest of this bridge. The Red Wing Bridge is slated for demolition and replacement, and as part of this project, this historic overpass is also currently at risk for demolition and replacement by MnDOT. MnDOT's decision to demolish the Red Wing Bridge even though it has no substantial structural problems would seem to give this overpass bridge little hope of survival, despite the fact that this overpass is also in decent structural condition.
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