| 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 |
390th Street Bridge
Iowa Bridge Number 171030 |
 | 390th Street Over Squaw Creek | Rural: Hamilton County, Iowa | Concrete T-Beam, Fixed |
Total Length: 65 ft Main Span Length: 30 ft Roadway Width: 18.4 ft Main Spans: 2 |
1917 By: Unknown | A good representative example of a standard Iowa T-beam bridge. | 
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Albright Bridge
Iowa Bridge Number 171910 |
 | Inkpaduta Avenue Over Boone River | Rural: Hamilton County, Iowa | Metal 8 Panel Pin-Connected Pratt Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed |
Total Length: 207 ft Main Span Length: 156 ft Roadway Width: 15.7 ft Main Spans: 1 |
1907 By: A. H. Austin of Webster City, Iowa | This bridge is among the longest pin-connected Pratt truss spans in the state. | 
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