| 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 |
Hardin City Bridge
|
 | Exhibit Over Exhibit | Rural: Hardin County, Iowa | Metal 10 Panel Pin-Connected Whipple Through Truss, Fixed |
Total Length: 140 ft Main Span Length: 140 ft Roadway Width: 16 ft Main Spans: 1 |
1879 By: Western Bridge Works of Fort Wayne, Indiana | An extremely early, unusual, and intact example of a pre-1880 Whipple truss bridge with cast iron components. | 
| X |
Iowa Falls Bridge
Oak Street Bridge |
 | US-65 (Oak Street) Over Iowa River | Iowa Falls: Hardin County, Iowa | Concrete Open Spandrel Deck Arch, Fixed |
Total Length: 255 ft Main Span Length: 235 ft Roadway Width: 24 ft Main Spans: 1 |
1928 By: Welden Brothers Construction Company of Iowa Falls, Iowa | The beauty and historic significance of this large and impressive arch bridge were not enough to save it from demolition. | 
|
|---|
