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220th Street Bridge

Iowa Bridge Number 342800

220th Street Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: July 1, 2009

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Key Facts

Facility Carried / Feature Intersected
220th Street Over Railroad (Union Pacific)
Rural: Webster County, Iowa: United States
Construction Date and Builder / Engineer
1889 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Main Span Length
76 Feet (23.2 Meters)
Structure Length
78 Feet (23.8 Meters)
Roadway Width
21 Feet (6.4 Meters)
1 Main Span(s)
NBI Number

Historic Significance Rating (HSR)
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Bridge Documentation

This six panel truss bridge is a traditionally composed riveted truss bridge in Iowa. It conforms to a standard railroad design plan and a number of bridges similar in design to this one remain in Iowa, although the exact size and configuration varies from bridge to bridge making each bridge unique in some way. 

This particular bridge has a unique history uncovered by John Marvig. This span was built in 1889 by the Minneapolis & St. Louis Railroad as one of two approach spans to a swing bridge at Carver, Minnesota. That bridge was replaced in 1917, and the two truss spans were reused as overpasses. It is not clear if this was the north or south approach, but one span ended up nearby in Minnesota, where it served until 2003. The other ended up here, where it appears to still be in good condition. Work for the erection was completed by the Minneapolis Steel Construction Company, also known as the Minneapolis Steel & Machinery Company. As part of the work, the original floor was cut out, and a new floor added. 

At the very least, the best representative examples of standard plan truss bridges such as this one should be highlighted for preservation to retain a record of this period in history. Longer spans, multi-span examples, and unaltered examples should receive preservation priority. 

In reality however, the majority of these bridges are fully capable of being rehabilitated for continued rural vehicular use and there is no reason to even consider the demolition of these bridges whether highly noteworthy or not. Many of Iowa's truss bridges are on rural dirt roads that have not been exposed to the extremely corrosive de-icing salt that bridges in other states have suffered from. As a result, they retain a comparatively high degree of structural integrity due to a striking lack of pack rust and section loss. In addition, these bridges were built with a higher quality of materials and construction than any modern bridge (contrary to what AASHTO would have you believe). These truss bridges are much more beautiful than any modern bridge. They contribute to the Iowa landscape in a positive manner and are an asset to the state. 

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

Above: Historical photo showing this span in its original location at Carver. Thanks to John Marvig for finding this photo.


Photo Galleries and Videos: 220th Street Bridge

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Maps and Links: 220th Street Bridge

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