| Special Bridge Conditions Legend |
| ! | Confirmed demolition date within one year or an especially historic bridge that is threatened with demolition at any level. |
| X | The bridge has been confirmed demolished or collapsed. |
| S | The bridge has been dismantled or moved to an offsite location and is not currently available for public viewing. |
| L | Most or all of the original bridge material has been demolished and replaced, including historically significant elements, but some original parts of the bridge remain. |
| Note: This website cannot guarantee the current condition of any bridge on this website. Bridges lacking these icons should not necessarily be considered condition-free. |
| Bridge Name | HSR Rating | Facility Carried / Feature Intersected | Location | Structure Type | Structure Dimensions | Construction Date / Builder or Contractor | Description | Thumbnail |
220th Street Bridge
Iowa Bridge Number 342800 |
 | 220th Street Over Railroad (Union Pacific) | Rural: Webster County, Iowa | Metal 6 Panel Rivet-Connected Howe Pony Truss, Fixed |
Total Length: 78 ft Main Span Length: 76 ft Roadway Width: 21 ft Main Spans: 1 |
By: Unknown | This rare example of a metal Howe truss bridge is an example of railroad thinking for highway bridges. | 
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Fort Dodge Railroad Bridge
Chicago Great Western Railroad Viaduct |
 | Railroad (Union Pacific) Over Des Moines River and Other Features | Rural: Webster County, Iowa | Metal 14 Panel Pin-Connected Baltimore Deck Truss, Fixed and Approach Spans: Metal Deck Girder, Fixed |
Total Length: 2582 ft Main Span Length: 220 ft Main Spans: 4 |
1903 By: Unknown | This is the second largest bridge in Iowa and is also a rare example of its type. | 
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