This bridge is the oldest known rainbow arch bridge in Minnesota. It is a specific variety of rainbow arch known as the Marsh arch, where the arch reinforcement is solid, built-up beams, similar to those found in Melan arch bridges. This Marsh arch was built by the the Marsh Engineering Company, which was the company that built Marsh arch bridges under the patent awarded to inventor James Marsh. This particular bridge is abandoned in every sense of the word. Not only has it been bypassed by a new bridge, the river it crosses has itself been realigned, so that this bridge just crosses dry land today. This abandoned bridge has deteriorated. While not good for preservation, the deterioration has exposed the reinforcing, allowing visitors to see how this bridge has solid reinforcing for the arch superstructure. It should be noted that the railings on the bridge use more traditional reinforcing rods for reinforcement.
The plaque for this bridge has been stolen, but the National Register Nomination contained a description of it as outlined below.
Main PlaqueDESIGNED AND BUILT 1911
MARSH ENGINEERING CO.
DES MOINES, IOWA
BLUE EARTH CO. MINN.
ALEC. HANSEN. CO. COMMISSIONER
This bridge is tagged with the following special condition(s): Marsh
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